https://conwaylife.com/w/api.php?action=feedcontributions&user=Hdjensofjfnen&feedformat=atomLifeWiki - User contributions [en]2019-10-23T23:15:10ZUser contributionsMediaWiki 1.33.0https://conwaylife.com/w/index.php?title=LifeWiki:News_archive&diff=64289LifeWiki:News archive2019-10-10T06:47:27Z<p>Hdjensofjfnen: /* 2019 */</p>
<hr />
<div>The following is a list of past news items that ran on the [[Main Page]]:<br />
<br />
==2019==<br />
* '''May 29''': Thomas Cabaret makes available a [https://cp4space.wordpress.com/2019/06/11/self-replicator-caught-on-video/ Passe-Science video] featuring [[self-constructing]] CA patterns, including several minutes showing details of the [[0E0P metacell]].<br />
* '''May 25''': Goldtiger997 completes a [http://conwaylife.com/forums/viewtopic.php?p=76686#p76686 glider-to-crab converter], with the help of a script implementing a universal glider synchronization [[toolkit]].<br />
* '''May 24-30''': christoph.r posts several [http://conwaylife.com/forums/viewtopic.php?p=76645#p76645 unusual breeder designs] based on c/10 technology, including [http://conwaylife.com/forums/viewtopic.php?p=76901#p76901 some variants] on a [[pufferfish]] [[breeder]].<br />
* '''May 9''': GilGil makes available a [http://conwaylife.com/forums/viewtopic.php?p=76571#p76571 huge but elegant 60-line printer] traveling at c/10, based on fleets of [[fireship]]s.<br />
* '''Apr. 21''': [http://conwaylife.com/forums/viewtopic.php?p=75278#p75278 Improvements to glider syntheses] mean that every 15-bit still life has a recipe with at most 13 gliders. The upper limit is currently 12 gliders for 14-bit still lifes, 10 gliders for 13 bits, 8 gliders for 12 bits, and 7 gliders for 11 bits.<br />
* '''Apr. 17''': [[Tanner Jacobi]] and [[Matthias Merzenich]] set several new bounding-box records with a [http://conwaylife.com/forums/viewtopic.php?p=75185#p75185 new glider gun mechanism] based on filtered MWSSes.<br />
* '''Apr. 14''': [[Michael Simkin]] completes a [[self-constructing]] puffer pattern which he calls [[Remini]] ("retro Gemini"), using a single-channel design with nothing but 1970s circuit mechanisms.<br />
* '''Apr. 10''': [[Jeremy Tan]] releases a new glider recipe database, [http://conwaylife.com/forums/viewtopic.php?p=74753#p74753 Shinjuku], specifically for tracking lowest-cost syntheses.<br />
* '''Apr. 6-7''': [[LifeViewer]] standardizes support for [[triangular neighbourhood]]s starting with Build 320.<br />
* '''Apr. 5''': An exhaustive computer search run by [[Nathaniel Johnston]] reveals that there are 14,223,867,298 strict and 15,851,861,075 pseudo [[:Category:Still lifes with 33 cells|33-bit]] [[still life]]s, including eleven pseudo still lifes that can be partitioned into [[Triple pseudo still life|three stable pieces but not two]], and none that can be partitioned into [[Quad pseudo still life|four stable pieces but not two or three]].[http://conwaylife.com/forums/viewtopic.php?p=74524#p74524]<br />
* '''Mar. 27''': The last remaining [[:Category:Strict still lifes with 14 cells|14-bit]] [[still life]], [https://catagolue.appspot.com/object/xs14_4ai3zwo9a4/b3s23 xs14_4ai3zwo9a4], appears in a [[symmetry|C1]] [[soup]] on [[Catagolue]], in a haul submitted by an anonymous user.[http://www.conwaylife.com/forums/viewtopic.php?p=74007#p74007]<br />
* '''Mar. 24''': [[apgsearch]] v5.03 gains the ability to log 'megasized' [[soup]]s with final [[population]]s exceeding 3,000.[https://gitlab.com/apgoucher/apgmera/commit/2133cb40147cbb7b70f1a5fb4709f8f3b2feb6f7] [[Apgsearch#Version_5.x|apgsearch 5.x]] can also pre-process asymmetric C1 B3/S23 soups on GPUs with CUDA support.[http://conwaylife.com/forums/viewtopic.php?p=73557#p73557]<br />
* '''Mar. 7''': A [[spider]] [[glider synthesis|synthesis]] using 574 [[glider]]s and 9 [[LWSS]]es is found by [[Martin Grant]]. [http://www.conwaylife.com/forums/viewtopic.php?p=72705#p72705]<br />
* '''Mar. 3''': A [[figure eight on pentadecathlon|period-120 oscillator]], the highest period thus far, occurs from a natural [[soup]] on [[Catagolue]].<br />
* '''Mar. 2''': Several symmetric-soup [[diehard]]s with [https://catagolue.appspot.com/object/messless_15h/b3s23 lifespans over 1500 ticks] are found by 'carybe', using [[apgsearch]].<br />
* '''Feb. 12''': A [[lightweight Schick engine]] appears from a natural (C1) [[soup]] on [[Catagolue]].<br />
* '''Feb. 9''': A [[47575M|47,575-tick 16x16 methuselah]] found by Adam Goucher via [[apgsearch]] yields a 16-cell, 47,487-tick methuselah. This discovery skips over several empty 1000-tick bins in [[Catagolue]] above the previous record 16x16 methuselah, [[Homer]].<br />
* '''Feb. 4''': A glider detection and removal upgrade in [[apgsearch]] version 4.91 gives a search speed boost of well over 50% compared to version 4.88.<br />
* '''Feb. 4''': [[Tanner Jacobi]] and [[Martin Grant]] [http://www.conwaylife.com/forums/viewtopic.php?p=69591#p69591 find a recipe], subsequently reduced to 88 gliders, for the first-ever synthesizable [[c/4]] spaceship, [[46P4H1V0]].<br />
* '''Jan. 21 - Feb. 1''': Additional (2,1)c/6 [[minstrel]]s and spaceship connections are found, bringing the number of combinations of elementary minstrels into double digits.<br />
* '''Jan. 25''': the ''[[Pattern of the Year#2018|Pattern of the Year 2018]]'' competition concludes, with [[Sir Robin]] taking first place.<br />
* '''Jan. 25''': [[LifeViewer]] [http://conwaylife.com/forums/viewtopic.php?p=68595#p68595 build 282] goes live on the LifeWiki and forums, with several enhancements including new labeling functionality.<br />
* '''Jan. 20''': [[Catagolue]] collects a record-setting longest-lived asymmetrical 16x16 [[diehard]], with a lifespan of 1058 ticks.<br />
* '''Jan. 17''': A new period-8 domino sparker, [[230P8]], is [http://conwaylife.com/forums/viewtopic.php?p=68099p68099 discovered by Arie Paap] and [http://conwaylife.com/forums/viewtopic.php?p=68104#p68104 reduced by 'Bullet51'].<br />
* '''Jan 16-18''': Four new [[minstrel]]s are found, plus a lucky connection of an existing minstrel to [[knightwave]], creating for the first time a [[grammar]] that allows for an infinite number of distinct [[elementary]] [[knightship]]s.<br />
* '''Jan 10''': A new period-24 oscillator, [[dueling banjos]], turns up in an [[apgsearch]] soup search. Uses so far include a smaller [[period-24 glider gun]], with associated improvements to p16 and p48 glider guns and a p48 LWSS gun.<br />
* '''Jan 3-7''': Record-setting [[diehard]]s are found by [[Rob Liston]] and [[Apple Bottom]] via [[apgsearch]].<br />
<br />
==2018==<br />
* '''Dec 7''': A new oblique [[camelship]], much smaller and lower population than the [[Spaceship#Adjustable_spaceships|Gemini 3 variant]] from 2010, is completed by Chris Cain.<br />
* '''Dec 2''': The value of V, the lowest number for which an oscillator can be constructed with strict [[volatility]] 1 for that or any higher period, is reduced to [http://www.conwaylife.com/forums/viewtopic.php?p=66138#p66138 3,506,909 ticks].<br />
* '''Nov 30''': Adam P. Goucher sets another new record using the latest apgsearch by finding "Homer", a [[42883M|16x16 methuselah with a lifespan of 42883 ticks]].<br />
* '''Nov 28''': An update to [[slsparse]] allows it to recognize [[45-degree MWSS-to-G]] converters in any orientation, and use unidirectional [[slow salvo]] recipes to construct them.<br />
* '''Nov 18''': Entity Valkyrie discovers a new period-13 [[FNG]] suppression mechanism, allowing the [[true]] [[period-52 glider gun]] to be reduced to less than a seventh of its previous size.<br />
* '''Nov 12''': A working [[0E0P metacell]] is announced by [[Adam P. Goucher]], along with [https://b3s23life.blogspot.com/2018/11/new-tools-for-self-construction.html several improvements] to [[slmake]], the program used to compile the metacell.<br />
* '''Oct 31''': An update to [[apgsearch]] sets another new record by finding a [[42100M|16x16 methuselah]] with a lifespan of 42,100 ticks.<br />
* '''Oct 31''': A self-constructing "loopship", a new type of spaceship with a non-[[Geminoid]] design, is completed by [[Dave Greene]].<br />
* '''Oct 30''': A [[periodic]] (p5 or p4) [http://www.conwaylife.com/forums/viewtopic.php?p=65290#p65198 quinti-Snark] is constructed by Tanner Jacobi, with the usual implications for reductions to the glider gun collection.<br />
* '''Oct 29''': [[apgluxe]] v4.56-[[lifelib|ll]]2.0.5 and [[Catagolue]] add support for [[BSFKL]] rules.<br />
* '''Oct 28''': A record-setting 39,693-tick methuselah, [[Wilma]], is discovered by [http://www.conwaylife.com/forums/viewtopic.php?t=&p=65124#p65124 Rob Liston] using a custom FPGA [[soup]] searcher.<br />
* '''Oct 27''': An [http://www.conwaylife.com/forums/viewtopic.php?p=65112#p65111 new LWSS synthesis] by [[Chris Cain]] allows for [[LWSS]], [[MWSS]], and [[HWSS]] guns with [[pseudo]] [[period]]s as low as 18. 18 is the minimum for HWSS streams.)<br />
* '''Oct 21''': [[Hartmut Holzwart]] completes a [http://www.conwaylife.com/forums/viewtopic.php?p=64968#p64968 two-dimensionally extensible wick-supporting pushalong] with a minimum width of over a thousand cells.<br />
* '''Oct 21''': New [[Orthogonoid]]s with periods 2<sup>27</sup> and 2<sup>28</sup> are [http://www.conwaylife.com/forums/viewtopic.php?p=64949#p64949 constructed] by [[Dave Greene]], followed by a 2<sup>25</sup> version by [[Adam P. Goucher]].<br />
* '''Oct 12''': A new [[:Category:Oscillators with period 14|period-14]] [[oscillator]], [[34P14.1]], is found by 'carybe'.<br />
* '''Oct 11''': Christoph R. [http://www.conwaylife.com/forums/viewtopic.php?p=64623#p64623 discovers] a [http://www.conwaylife.com/forums/viewtopic.php?p=64627#p64627 new Fireship tagalong].<br />
* '''Oct 10''': [[Dave Greene]] [http://www.conwaylife.com/forums/viewtopic.php?p=64590#p64590 completes the construction] of two new [[HashLife]]-friendly [[Demonoid]]s.<br />
* '''Oct 07''': [http://www.conwaylife.com/forums/viewtopic.php?p=64619#p64489 A complex 140-glider synthesis] of a c/2 signal traveling along a diagonal long<sup>N</sup> barge [[wire]] is completed by Martin Grant.<br />
* '''Oct 03''': A [http://conwaylife.com/forums/viewtopic.php?p=64315#p64315 p4 [[bouncer]] reflector] is constructed by Arie Paap. With the p9 reflector, this completes the set of [[colour-changing]] and [[colour-preserving]] reflectors with periods from 4 to 9.<br />
* '''Oct 02''': A p9 reflector is discovered [http://conwaylife.com/forums/viewtopic.php?f=2&t=1452&start=1750#p64309 by Matthias Merzenich and "carybe"] based on Noam Elkies' [[bouncer]] reaction. This is the first reflector capable of reflecting a p27 glider stream.<br />
* '''Oct 02''': A [[true]] p33 gun is discovered [http://conwaylife.com/forums/viewtopic.php?f=2&t=3552&p=64281#p64266 by Arie Paap and Matthias Merzenich].<br />
* '''Sep 27''': A [[true]] [[p52 gun]] is [http://conwaylife.com/forums/viewtopic.php?p=64084#p64084 completed by a collaborative effort].<br />
* '''Sep 9''': [[Dave Greene]] completes the construction of a stable [[line crosser]] with a [[repeat time]] of 501 ticks.<br />
* '''Jul 15/19''': The [[Minstrel]]s, a group of [[tagalong]]s for [[Sir Robin]], are discovered.<br />
* '''Jun 14''': The [https://b3s23life.blogspot.com/2018/06/the-meaning-of-life-is-42-but-cost-of.html construction] of a [[reverse caber-tosser]] shows that any [[glider synthesis|glider-constructible]] object can be constructed with at most 35 [[glider]]s.<br />
* '''Apr 04''': A [[p3 bumper|p3 reflector]] is discovered by Arie Paap based on Tanner Jacobi's [[bumper]] reaction. This is the first reflector capable of reflecting a p39 glider stream.<br />
* '''Mar 06''': [[Sir Robin]], the first [[elementary]] [[knightship]] in [[Conway's Game of Life|Life]], is discovered by [[Adam P. Goucher]] and [[Tomas Rokicki|Tom Rokicki]].<br />
* '''Feb 19''': The [[2-engine Cordership]] wins the 2017 [[Pattern of the Year]] competition, with [[Tanner's p46]] taking second place.<br />
<br />
==Also see==<br />
* [[LifeWiki:Did you know archive]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Long_shillelagh&diff=63834Long shillelagh2019-09-27T02:55:21Z<p>Hdjensofjfnen: /* Trivia */</p>
<hr />
<div>{{Stilllife<br />
|name = Long shillelagh<br />
|pname = longshillelagh<br />
|c = 9<br />
|bx = 6<br />
|by = 3<br />
|fc = 20.2<br />
|rulemin = B/S23<br />
|rulemax = B3678/S012345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B/S2-ci3n<br />
|isorulemax = B2in34-kr5-q678/S012345678<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xs9_312453<br />
|niemiecid = 9.7<br />
|pentadecathlonid = 9.2<br />
|viewerconfig = [[ THUMBSIZE 2 ]]<br />
}}<br />
'''Long shillelagh''' is [[:Category:patterns with 9 cells|9]]-[[cell]] [[still life]]. It is the [[long]] version of the [[shillelagh]].<br />
<br />
==[[List of common still lifes|Commonness]]==<br />
Long shillelagh is the sixty-second most common still life in [[Achim Flammenkamp's census]], less common than the [[integral with tub]] but more common than [[trans-R-bee and R-loaf]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> It is also the seventy-fourth most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref><br />
<br />
==Trivia==<br />
Two copies of this still life can position themselves in such a way so that they share two-fold C2_4 [[Symmetry#Square-grid_symmetries|rotational symmetry]]. In this orientation, they can be considered one [[strict still life]] and fit in a 6-by-6 [[bounding box]], giving the resultant still life the highest [[density]] of all still lifes fitting inside such a bounding box.<br />
<br />
==See also==<br />
*[[Cis-shillelagh]]<br />
*[[Very long shillelagh]]<br />
<br />
== References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|LongShillelagh.html}}<br />
{{LinkLexicon|lex_l.htm#longshillelagh}}<br />
{{LinkCatagolue|xs9_312453}}<br />
{{LinkNiemiec|p1.htm#p1-9|patternname=The 10 nine-bit still-lifes}}<br />
__NOTOC__<br />
<br />
[[Category:Diagonal line stabilisations]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Long_shillelagh&diff=63833Long shillelagh2019-09-27T02:54:14Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Stilllife<br />
|name = Long shillelagh<br />
|pname = longshillelagh<br />
|c = 9<br />
|bx = 6<br />
|by = 3<br />
|fc = 20.2<br />
|rulemin = B/S23<br />
|rulemax = B3678/S012345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B/S2-ci3n<br />
|isorulemax = B2in34-kr5-q678/S012345678<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xs9_312453<br />
|niemiecid = 9.7<br />
|pentadecathlonid = 9.2<br />
|viewerconfig = [[ THUMBSIZE 2 ]]<br />
}}<br />
'''Long shillelagh''' is [[:Category:patterns with 9 cells|9]]-[[cell]] [[still life]]. It is the [[long]] version of the [[shillelagh]].<br />
<br />
==[[List of common still lifes|Commonness]]==<br />
Long shillelagh is the sixty-second most common still life in [[Achim Flammenkamp's census]], less common than the [[integral with tub]] but more common than [[trans-R-bee and R-loaf]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> It is also the seventy-fourth most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref><br />
<br />
==Trivia==<br />
Two copies of this still life can position themselves in such a way so that they share two-fold C2_4 [[Symmetry#Square-grid_symmetries|rotational symmetry]]. In this orientation, they can be considered one [[strict still life]] and fit in a 6-by-6 [[bounding box]], giving it the highest [[density]] of all still lifes fitting inside such a bounding box.<br />
<br />
==See also==<br />
*[[Cis-shillelagh]]<br />
*[[Very long shillelagh]]<br />
<br />
== References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|LongShillelagh.html}}<br />
{{LinkLexicon|lex_l.htm#longshillelagh}}<br />
{{LinkCatagolue|xs9_312453}}<br />
{{LinkNiemiec|p1.htm#p1-9|patternname=The 10 nine-bit still-lifes}}<br />
__NOTOC__<br />
<br />
[[Category:Diagonal line stabilisations]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Negative_spaceship&diff=63832Negative spaceship2019-09-27T02:32:10Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Glossary}}<br />
A '''negative spaceship''' is a a type of [[signal]] traveling through a periodic [[agar]] such as [[zebra stripes]], and thus comparable to a [[spaceship]]. The leading edge of the signal removes the agar, and the trailing edge rebuilds the agar some time later. The distance between the two edges is sometimes adjustable, as shown in [[lightspeed bubble]]. The central part of the "spaceship" may consist of dying [[spark]]s or even simple [[empty space]].<br />
<br />
Below is a sample period-5 negative spaceship, found by [[Hartmut Holzwart]] in March {{year|2007}}, travelling to the left at the [[speed of light]]:<br />
<br />
{{EmbedViewer|<br />
|pname = negativespaceship<br />
|viewerconfig = #C [[ THUMBNAIL THUMBSIZE 2 THEME 6 HEIGHT 480 GPS 6 ZOOM 11 AUTOSTART ]]<br />
|position = center<br />
}}<br />
<br />
==Also see==<br />
* [[Against the grain]]<br />
* [[With the grain]]<br />
<br />
==External links==<br />
{{LinkLexicon|lex_n.htm#negativespaceship}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=101&diff=589731012019-03-11T23:18:28Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = 101<br />
|pname = 101<br />
|c = 64<br />
|bx = 18<br />
|by = 12<br />
|p = 5<br />
|m = 5<br />
|h = 17.6<br />
|v = 0.46<br />
|sv = 0.46<br />
|discoverer = Achim Flammenkamp<br />
|discoveryear = 1994<br />
|rulemin = B3/S23<br />
|rulemax = B378/S023678<br />
|rulespecial = [[DotLife]], [[Conway's Game of Life|Conway's Life]], [[DryLife]]<br />
|isorulemin = B3eijkn/S2-n3-cjq<br />
|isorulemax = B34-anw5cikn6-ik78/S01c234-anrtz5-i678<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xp5_g88bb88bb88gz11wp55pw11zckggkllkggkczx66w66<br />
|pentadecathlonid = 64P5.2<br />
|animated = yes<br />
|viewerconfig = #C [[ GPS 2 THUMBSIZE 2 ]]<br />
}}<br />
'''101''' is a period 5 [[oscillator]] that was found by [[:Category:Patterns found by Achim Flammenkamp|Achim Flammenkamp]] in August [[:Category:Patterns found in 1994|1994]]. The name was suggested by [[:Category:Patterns found by Bill Gosper|Bill Gosper]], noting that one of its [[phase]]s displays the [[period]] in binary.<br />
<br />
==External links==<br />
{{LinkWeisstein|101.html}}<br />
{{LinkLexicon|lex_1.htm#a-101}}<br />
{{LinkCatagolue|xp5_g88bb88bb88gz11wp55pw11zckggkllkggkczx66w66}}<br />
{{LinkPentadecathlonObject|64P5.2}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 5]]<br />
[[Category:Strong sparkers]]<br />
[[Category:Domino sparkers]]<br />
{{Symmetry|orthogonal4}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=339P7H1V0&diff=58915339P7H1V02019-03-08T07:53:55Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Spaceship<br />
|name = 339P7H1V0<br />
|pname = 339p7h1v0<br />
|c = 339<br />
|bx = 17<br />
|by = 96<br />
|dir = Orthogonal<br />
|p = 7<br />
|m = 7<br />
|s = c/7<br />
|z = c/7<br />
|h = 316.6<br />
|discoverer = Matthias Merzenich<br />
|discoveryear = 2017<br />
|rulemin = B3/S23<br />
|rulemax = B38/S23<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3/S23<br />
|isorulemax = B34e8/S234c<br />
|rle = true<br />
|apgcode = xq7_y033jg0gj33z0hh10ghxhg01hhz0376fi0v0v0if673zy0134707431zxsi0ab9ba0isz0oqihx7xhiqozwgg3ooxoo3ggz0bo8piq222qip8obzx8koy1ok8z0co4054x4504oczwo6mcy1cm6oz06kn9y39nk6z08cdogy1godc8z31p0hvy1vh0p13zx3dwu0uwd3zy1mu101umzy033og0go33zy1pv4e4vpz0o808oy1o808ozw1w1y11w1<br />
|viewerconfig = #C [[ ZOOM 4 TRACKLOOP 7 0 -1/7 THUMBSIZE 2 GPS 14 HEIGHT 480 WIDTH 480 ]]<br />
}}<br />
'''339P7H1V0''' is an unnamed [[c/7 orthogonal]] [[spaceship]] found by [[Matthias Merzenich]] on February 4, [[:Category:Patterns found in 2017|2017]]. It is the second known [[Spaceship#Elementary_spaceships|elementary]] c/7 orthogonal spaceship after the [[loafer]]. It pushes 2 [[blinker]]s and 2 [[beehive]]s. Its back is reminiscent of two copies of [[HighLife]]'s small period-10 oscillator.<br />
<br />
==See also==<br />
* [[Dragon]]<br />
<br />
==External links==<br />
{{LinkCatagolue|xq7_y033jg0gj33z0hh10ghxhg01hhz0376fi0v0v0if673zy0134707431zxsi0ab9ba0isz0oqihx7xhiqozwgg3ooxoo3ggz0bo8piq222qip8obzx8koy1ok8z0co4054x4504oczwo6mcy1cm6oz06kn9y39nk6z08cdogy1godc8z31p0hvy1vh0p13zx3dwu0uwd3zy1mu101umzy033og0go33zy1pv4e4vpz0o808oy1o808ozw1w1y11w1|format=extended}}<br />
<br />
{{Symmetry|orthogonal2}}<br />
<br />
[[Category:Unnamed periodic objects]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Spider&diff=58914Spider2019-03-08T07:46:24Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Spaceship<br />
|name = Spider<br />
|pname = spider<br />
|c = 58<br />
|bx = 27<br />
|by = 8<br />
|dir = Orthogonal<br />
|p = 5<br />
|m = 5<br />
|s = c/5<br />
|z = c/5<br />
|h = 53.6<br />
|discoverer = David Bell<br />
|discoveryear = 1997<br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3/S23-cy<br />
|isorulemax = B34cekq5e6c8/S234ceq5-ciqr6acn7c8<br />
|plaintext = true<br />
|rle = true<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 5 TRACKLOOP 5 0 -1/5 THUMBSIZE 2 ]]<br />
|apgcode = xq5_ug1hmgc865da808ad568cgmh1guz124w6yb6w421<br />
|pentadecathlonid = 58P5H1V0.1<br />
|eppsteinid = 18216<br />
}}<br />
'''Spider''' is an orthogonal [[c/5 orthogonal|c/5]] [[spaceship]] that was discovered by [[:Category:Patterns found by David Bell|David Bell]] in April [[:Category:Patterns found in 1997|1997]]. It is the smallest known c/5 orthogonal spaceship. Its side [[spark]]s have proven to be very useful in constructing [[puffer]]s and [[rake]]s.<br />
On March 7, 2019, forum user 'Extrementhusiast' completed the first known synthesis of spider (and thus the first synthesis of any c/5 orthogonal) using a mere 601 gliders.<br />
<br />
==See also==<br />
*[[Pre-pulsar spaceship]]<br />
*[[Snail]]<br />
<br />
==External links==<br />
{{LinkLexicon|lex_s.htm#spider}}<br />
{{LinkEppstein|18216|patternname=The Spider (glider 18216)}}<br />
{{LinkCatagolue|xq5_ug1hmgc865da808ad568cgmh1guz124w6yb6w421}}<br />
{{LinkPentadecathlonObject|58P5H1V0.1}}<br />
<br />
{{Symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Spider&diff=58913Spider2019-03-08T07:45:36Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Spaceship<br />
|name = Spider<br />
|pname = spider<br />
|c = 58<br />
|bx = 27<br />
|by = 8<br />
|dir = Orthogonal<br />
|p = 5<br />
|m = 5<br />
|s = c/5<br />
|z = c/5<br />
|h = 53.6<br />
|discoverer = David Bell<br />
|discoveryear = 1997<br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3/S23-cy<br />
|isorulemax = B34cekq5e6c8/S234ceq5-ciqr6acn7c8<br />
|plaintext = true<br />
|rle = true<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 5 TRACKLOOP 5 0 -1/5 THUMBSIZE 2 ]]<br />
|apgcode = xq5_ug1hmgc865da808ad568cgmh1guz124w6yb6w421<br />
|pentadecathlonid = 58P5H1V0.1<br />
|eppsteinid = 18216<br />
}}<br />
'''Spider''' is an orthogonal [[c/5 orthogonal|c/5]] [[spaceship]] that was discovered by [[:Category:Patterns found by David Bell|David Bell]] in April [[:Category:Patterns found in 1997|1997]]. It is the smallest known c/5 orthogonal spaceship. Its side [[spark]]s have proven to be very useful in constructing [[puffer]]s and [[rake]]s.<br />
On March 7, 2019, forum user 'Extrementhusiast' completed the first known synthesis of spider, (and, thus, any c/5 orthogonal in general), using a mere 601 gliders.<br />
<br />
==See also==<br />
*[[Pre-pulsar spaceship]]<br />
*[[Snail]]<br />
<br />
==External links==<br />
{{LinkLexicon|lex_s.htm#spider}}<br />
{{LinkEppstein|18216|patternname=The Spider (glider 18216)}}<br />
{{LinkCatagolue|xq5_ug1hmgc865da808ad568cgmh1guz124w6yb6w421}}<br />
{{LinkPentadecathlonObject|58P5H1V0.1}}<br />
<br />
{{Symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Spider&diff=58912Spider2019-03-08T07:42:03Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Spaceship<br />
|name = Spider<br />
|pname = spider<br />
|c = 58<br />
|bx = 27<br />
|by = 8<br />
|dir = Orthogonal<br />
|p = 5<br />
|m = 5<br />
|s = c/5<br />
|z = c/5<br />
|h = 53.6<br />
|discoverer = David Bell<br />
|discoveryear = 1997<br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3/S23-cy<br />
|isorulemax = B34cekq5e6c8/S234ceq5-ciqr6acn7c8<br />
|plaintext = true<br />
|rle = true<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 5 TRACKLOOP 5 0 -1/5 THUMBSIZE 2 ]]<br />
|apgcode = xq5_ug1hmgc865da808ad568cgmh1guz124w6yb6w421<br />
|pentadecathlonid = 58P5H1V0.1<br />
|eppsteinid = 18216<br />
}}<br />
'''Spider''' is an orthogonal [[c/5 orthogonal|c/5]] [[spaceship]] that was discovered by [[:Category:Patterns found by David Bell|David Bell]] in April [[:Category:Patterns found in 1997|1997]]. It is the smallest known c/5 orthogonal spaceship. Its side [[spark]]s have proven to be very useful in constructing [[puffer]]s and [[rake]]s.<br />
On March 7, 2019, forum user 'Extremeenthusiast' completed the first known synthesis of spider (and, thus, any c/5 orthogonal in general).<br />
<br />
==See also==<br />
*[[Pre-pulsar spaceship]]<br />
*[[Snail]]<br />
<br />
==External links==<br />
{{LinkLexicon|lex_s.htm#spider}}<br />
{{LinkEppstein|18216|patternname=The Spider (glider 18216)}}<br />
{{LinkCatagolue|xq5_ug1hmgc865da808ad568cgmh1guz124w6yb6w421}}<br />
{{LinkPentadecathlonObject|58P5H1V0.1}}<br />
<br />
{{Symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Trans-barge_with_tail&diff=58868Trans-barge with tail2019-03-06T06:13:20Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Stilllife<br />
|name = Trans-barge with tail<br />
|pname = transbargewithtail<br />
|c = 10<br />
|bx = 6<br />
|by = 6<br />
|fc = 21.5<br />
|rulemin = B/S23<br />
|rulemax = B35678/S012345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B/S2-in3cr<br />
|isorulemax = B2-ae34-aejn5678/S012345678<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xs10_ggka52z1<br />
|niemiecid = 10.5<br />
|pentadecathlonid = 10.20<br />
}}<br />
'''Trans-barge with tail''' (or '''up barge with tail''') is a 10-bit [[still life]]. It makes a brief appearance at generation 6155 of the [[methuselah]] [[Ed]].<br />
<br />
==[[List of common still lifes|Commonness]]==<br />
Trans-barge with tail is the eighty-fourth most common [[still life]] in [[Achim Flammenkamp's census]], being less common than [[snorkel loop]], but more common than [[beehive on cap]].<ref>{{citeAchim|accessdate=November 3, 2009}}</ref> It is also the ninety-eighth most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref><br />
<br />
==Synthesis==<br />
On April 13, [[:Category:patterns found in 2007|2007]] [[Dean Hickerson]] found a [[:Category:patterns that can be constructed with 4 gliders|4]]-[[glider]] [[glider synthesis|synthesis]] of this still life.<ref>Dean Hickerson's [http://radicaleye.com/DRH/syntheses.html 2, 3, and 4-glider syntheses] pattern collection</ref><br />
<br />
==See also==<br />
*[[Barge]]<br />
*[[Cis-barge with tail]]<br />
<br />
==References==<br />
<references/><br />
<br />
==External links==<br />
{{LinkCatagolue|xs10_ggka52z1|patternname=Trans barge with tail}}<br />
{{LinkNiemiec|p1.htm#p1-10|patternname=The 25 ten-bit still-lifes}}<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Trans-barge_with_tail&diff=58867Trans-barge with tail2019-03-06T06:12:56Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Stilllife<br />
|name = Trans-barge with tail<br />
|pname = transbargewithtail<br />
|c = 10<br />
|bx = 6<br />
|by = 6<br />
|fc = 21.5<br />
|rulemin = B/S23<br />
|rulemax = B35678/S012345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B/S2-in3cr<br />
|isorulemax = B2-ae34-aejn5678/S012345678<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xs10_ggka52z1<br />
|niemiecid = 10.5<br />
|pentadecathlonid = 10.20<br />
}}<br />
'''Trans-barge with tail''' (or '''up barge with tail''') is a 10-bit [[still life]]. It makes a brief appearance in the evolution of the [[methuselah]] [[Ed]].<br />
<br />
==[[List of common still lifes|Commonness]]==<br />
Trans-barge with tail is the eighty-fourth most common [[still life]] in [[Achim Flammenkamp's census]], being less common than [[snorkel loop]], but more common than [[beehive on cap]].<ref>{{citeAchim|accessdate=November 3, 2009}}</ref> It is also the ninety-eighth most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref><br />
<br />
==Synthesis==<br />
On April 13, [[:Category:patterns found in 2007|2007]] [[Dean Hickerson]] found a [[:Category:patterns that can be constructed with 4 gliders|4]]-[[glider]] [[glider synthesis|synthesis]] of this still life.<ref>Dean Hickerson's [http://radicaleye.com/DRH/syntheses.html 2, 3, and 4-glider syntheses] pattern collection</ref><br />
<br />
==See also==<br />
*[[Barge]]<br />
*[[Cis-barge with tail]]<br />
<br />
==References==<br />
<references/><br />
<br />
==External links==<br />
{{LinkCatagolue|xs10_ggka52z1|patternname=Trans barge with tail}}<br />
{{LinkNiemiec|p1.htm#p1-10|patternname=The 25 ten-bit still-lifes}}<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Figure_eight&diff=58864Figure eight2019-03-05T05:52:16Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Figure eight<br />
|pname = figureeight<br />
|c = 12<br />
|bx = 10<br />
|by = 10<br />
|fc = 23.4<br />
|p = 8<br />
|m = 8<br />
|h = 16.5<br />
|v = 1.00<br />
|sv = 1.00<br />
|discoverer = Simon Norton<br />
|discoveryear = 1970<br />
|rulemin = B3/S23<br />
|rulemax = B378/S237<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-jky/S2-e3acinq<br />
|isorulemax = B2ci34cikqtyz5-k6-n78/S234-jknqr5-aci6-e7<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xp8_gk2gb3z11<br />
|pentadecathlonid = 12P8.1<br />
|animated = yes<br />
|viewerconfig = #C [[ GPS 4 THUMBSIZE 2 ]]<br />
}}<br />
'''Figure eight''' (or less frequently, '''big [[beacon]]'''<ref>{{CiteLexicon|file=lex_b.htm#bigbeacon|name=Big beacon|accessdate=June 14, 2011}}</ref> or '''lemniscate''') is a [[period]] [[:Category:Oscillators with period 8|8]] [[oscillator]] found by [[:Category:Patterns found by Simon Norton|Simon Norton]] in [[:Category:Patterns found in 1970|1970]]. With [[:Category:Patterns with 12 cells|12]] [[cell]]s in its initial [[phase]], it is the smallest known period 8 oscillator, behind [[blocker]] at [[:Category:Patterns with 15 cells|15]] cells. It is known that no period 8 oscillators exist with 10 or fewer cells.<ref>{{cite web|url=http://codercontest.com/mniemiec/p8osc.htm |title=Life Period-8 Oscillators|author=Mark Niemiec|date=1998 |accessdate=February 5, 2009}}</ref><br />
<br />
==As a building block for larger oscillators==<br />
Because it produces a domino [[spark]] in one of its phases, it is useful for constructing larger oscillators that have period that is a multiple of eight. For example, it appears in [[tumbling T-tetson]] (period 8), [[sailboat]] (period [[:Category:Oscillators with period 16|16]]), [[caterer on figure eight]] (the smallest period [[:Category:Oscillators with period 24|24]] oscillator), and [[figure eight on 36P22]] (period [[:Category:Oscillators with period 88|88]]).<br />
<br />
==As a reflector==<br />
Figure eight has the ability to act as a 90-degree [[glider]] [[reflector]] when it is combined with a [[block]], [[boat]] and [[eater 1]]. The input path (in green) and output path (in red) of the glider are shown below.<br />
<br />
[[Image:Figure_eight_reflector.PNG|framed|center|Figure eight acting as a reflector<br />{{JavaRLE|figureeightasreflector|brief}}]]<br />
<br />
==[[List of common oscillators|Commonness]]==<br />
Figure eight is the tenth most [[common]] naturally-occurring oscillator in [[Achim Flammenkamp's census]], being less common than the [[great on-off]] but more common than the [[spark coil]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> On [[Catagolue]], it is the most common period 8 oscillator, being more common than [[blocker]].<ref>{{citeCatagolueStats|October 27, 2018}}</ref><br />
<br />
==Image gallery==<br />
<gallery><br />
Image:figureeightorigin.png|One of the phases of the oscillator, which led to both of its names. <br />
</gallery><br />
<br />
==See also==<br />
*[[Kok's galaxy]]<br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|filename=Figure8.html|patternname=Figure 8}}<br />
{{LinkLexicon|filename=lex_f.htm#figure8|patternname=Figure-8}}<br />
{{LinkCatagolue|xp8_gk2gb3z11|patternname=Figure-8}}<br />
{{LinkPentadecathlonObject|12P8.1}}<br />
<br />
{{Symmetry|diagonal4}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 8]]<br />
[[Category:Moderate sparkers]]<br />
[[Category:Domino sparkers]]<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=44P12.3&diff=5885144P12.32019-03-04T03:27:10Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = 44P12.3<br />
|pname = 44p123<br />
|c = 44<br />
|bx = 14<br />
|by = 14<br />
|p = 12<br />
|m = 12<br />
|h = 38<br />
|v = 0.87<br />
|sv = 0.87<br />
|discoverer = Nicolay Beluchenko<br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-cky/S2-n3<br />
|isorulemax = B34ciqry5ac6ce8/S234cez5ckqry6ain7e8<br />
|synthesis = 142<br />
|rle = true<br />
|apgcode = xp12_xg8kmjgz4630fgmmgfgc62zy2c621<br />
|pentadecathlonid = 44P12.3<br />
|animated = yes<br />
|viewerconfig = #C [[ THUMBSIZE 3 GPS 5 ZOOM 24 HEIGHT 500 WIDTH 500 ]]<br />
}}<br />
'''44P12.3''' is an unnamed [[period]] [[:Category:Oscillators with period 12|12]] [[oscillator]], discovered by Nicolay Beluchenko.<ref name="post18959">{{LinkForumThread<br />
|p = 18959<br />
|title = Re: Soup search results<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><ref>{{CiteSummersPattern}}</ref><br />
<br />
On January 12, {{year|2019}}, [[Tanner Jacobi]] used it along with [[dueling banjos]], a [[heavyweight emulator]] variant, and [[Pipsquirter 1]] to build a period 24 [[glider gun]] which was then optimized by [[Matthias Merzenich]] the next day to be smaller than the [[period-24 glider gun|previous record holder]].<ref name="post67786" /><ref name="post67805" /><br />
<br />
==References==<br />
<references><br />
<ref name="post67786">{{LinkForumThread<br />
|p = 67786<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Tanner Jacobi<br />
|format = ref<br />
}}</ref><br />
<ref name="post67805">{{LinkForumThread<br />
|p = 67805<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
</references><br />
<br />
== External links ==<br />
{{LinkNiemiec|p12.htm#p12-lg|patternname=4 period 12 oscillators 26 bits and larger}}<br />
{{LinkPentadecathlonObject|44P12.3}}<br />
{{LinkCatagolue|xp12_xg8kmjgz4630fgmmgfgc62zy2c621}}<br />
<br />
{{Symmetry|diagonal4}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 12]]<br />
[[Category:Moderate sparkers]]<br />
[[Category:Irreflectable duoplet sparkers]]<br />
[[Category:Unnamed periodic objects]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=44P12.3&diff=5885044P12.32019-03-04T03:26:45Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = 44P12.3<br />
|pname = 44p123<br />
|c = 44<br />
|bx = 14<br />
|by = 14<br />
|p = 12<br />
|m = 12<br />
|h = 38<br />
|v = 0.87<br />
|sv = 0.87<br />
|discoverer = Nicolay Beluchenko<br />
</references><br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-cky/S2-n3<br />
|isorulemax = B34ciqry5ac6ce8/S234cez5ckqry6ain7e8<br />
|synthesis = 142<br />
|rle = true<br />
|apgcode = xp12_xg8kmjgz4630fgmmgfgc62zy2c621<br />
|pentadecathlonid = 44P12.3<br />
|animated = yes<br />
|viewerconfig = #C [[ THUMBSIZE 3 GPS 5 ZOOM 24 HEIGHT 500 WIDTH 500 ]]<br />
}}<br />
'''44P12.3''' is an unnamed [[period]] [[:Category:Oscillators with period 12|12]] [[oscillator]], discovered by Nicolay Beluchenko.<ref name="post18959">{{LinkForumThread<br />
|p = 18959<br />
|title = Re: Soup search results<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><ref>{{CiteSummersPattern}}</ref><br />
<br />
On January 12, {{year|2019}}, [[Tanner Jacobi]] used it along with [[dueling banjos]], a [[heavyweight emulator]] variant, and [[Pipsquirter 1]] to build a period 24 [[glider gun]] which was then optimized by [[Matthias Merzenich]] the next day to be smaller than the [[period-24 glider gun|previous record holder]].<ref name="post67786" /><ref name="post67805" /><br />
<br />
==References==<br />
<references><br />
<ref name="post67786">{{LinkForumThread<br />
|p = 67786<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Tanner Jacobi<br />
|format = ref<br />
}}</ref><br />
<ref name="post67805">{{LinkForumThread<br />
|p = 67805<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
</references><br />
<br />
== External links ==<br />
{{LinkNiemiec|p12.htm#p12-lg|patternname=4 period 12 oscillators 26 bits and larger}}<br />
{{LinkPentadecathlonObject|44P12.3}}<br />
{{LinkCatagolue|xp12_xg8kmjgz4630fgmmgfgc62zy2c621}}<br />
<br />
{{Symmetry|diagonal4}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 12]]<br />
[[Category:Moderate sparkers]]<br />
[[Category:Irreflectable duoplet sparkers]]<br />
[[Category:Unnamed periodic objects]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=44P12.3&diff=5884844P12.32019-03-04T03:26:23Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = 44P12.3<br />
|pname = 44p123<br />
|c = 44<br />
|bx = 14<br />
|by = 14<br />
|p = 12<br />
|m = 12<br />
|h = 38<br />
|v = 0.87<br />
|sv = 0.87<br />
|discoverer = Nicolay Beluchenko <ref name="post18959">{{LinkForumThread<br />
|p = 18959<br />
|title = Re: Soup search results<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
</references><br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-cky/S2-n3<br />
|isorulemax = B34ciqry5ac6ce8/S234cez5ckqry6ain7e8<br />
|synthesis = 142<br />
|rle = true<br />
|apgcode = xp12_xg8kmjgz4630fgmmgfgc62zy2c621<br />
|pentadecathlonid = 44P12.3<br />
|animated = yes<br />
|viewerconfig = #C [[ THUMBSIZE 3 GPS 5 ZOOM 24 HEIGHT 500 WIDTH 500 ]]<br />
}}<br />
'''44P12.3''' is an unnamed [[period]] [[:Category:Oscillators with period 12|12]] [[oscillator]], discovered by Nicolay Beluchenko.<ref name="post18959" /><ref>{{CiteSummersPattern}}</ref><br />
<br />
On January 12, {{year|2019}}, [[Tanner Jacobi]] used it along with [[dueling banjos]], a [[heavyweight emulator]] variant, and [[Pipsquirter 1]] to build a period 24 [[glider gun]] which was then optimized by [[Matthias Merzenich]] the next day to be smaller than the [[period-24 glider gun|previous record holder]].<ref name="post67786" /><ref name="post67805" /><br />
<br />
==References==<br />
<references><br />
<ref name="post67786">{{LinkForumThread<br />
|p = 67786<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Tanner Jacobi<br />
|format = ref<br />
}}</ref><br />
<ref name="post67805">{{LinkForumThread<br />
|p = 67805<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
</references><br />
<br />
== External links ==<br />
{{LinkNiemiec|p12.htm#p12-lg|patternname=4 period 12 oscillators 26 bits and larger}}<br />
{{LinkPentadecathlonObject|44P12.3}}<br />
{{LinkCatagolue|xp12_xg8kmjgz4630fgmmgfgc62zy2c621}}<br />
<br />
{{Symmetry|diagonal4}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 12]]<br />
[[Category:Moderate sparkers]]<br />
[[Category:Irreflectable duoplet sparkers]]<br />
[[Category:Unnamed periodic objects]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=44P12.3&diff=5884744P12.32019-03-04T03:26:07Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = 44P12.3<br />
|pname = 44p123<br />
|c = 44<br />
|bx = 14<br />
|by = 14<br />
|p = 12<br />
|m = 12<br />
|h = 38<br />
|v = 0.87<br />
|sv = 0.87<br />
|discoverer = Nicolay Beluchenko <ref name="post18959">{{LinkForumThread<br />
|p = 18959<br />
|title = Re: Soup search results<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
</references><br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-cky/S2-n3<br />
|isorulemax = B34ciqry5ac6ce8/S234cez5ckqry6ain7e8<br />
|synthesis = 142<br />
|rle = true<br />
|apgcode = xp12_xg8kmjgz4630fgmmgfgc62zy2c621<br />
|pentadecathlonid = 44P12.3<br />
|animated = yes<br />
|viewerconfig = #C [[ THUMBSIZE 3 GPS 5 ZOOM 24 HEIGHT 500 WIDTH 500 ]]<br />
}}<br />
'''44P12.3''' is an unnamed [[period]] [[:Category:Oscillators with period 12|12]] [[oscillator]], discovered by [[Nicolay Beluchenko]].<ref name="post18959" /><ref>{{CiteSummersPattern}}</ref><br />
<br />
On January 12, {{year|2019}}, [[Tanner Jacobi]] used it along with [[dueling banjos]], a [[heavyweight emulator]] variant, and [[Pipsquirter 1]] to build a period 24 [[glider gun]] which was then optimized by [[Matthias Merzenich]] the next day to be smaller than the [[period-24 glider gun|previous record holder]].<ref name="post67786" /><ref name="post67805" /><br />
<br />
==References==<br />
<references><br />
<ref name="post67786">{{LinkForumThread<br />
|p = 67786<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Tanner Jacobi<br />
|format = ref<br />
}}</ref><br />
<ref name="post67805">{{LinkForumThread<br />
|p = 67805<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
</references><br />
<br />
== External links ==<br />
{{LinkNiemiec|p12.htm#p12-lg|patternname=4 period 12 oscillators 26 bits and larger}}<br />
{{LinkPentadecathlonObject|44P12.3}}<br />
{{LinkCatagolue|xp12_xg8kmjgz4630fgmmgfgc62zy2c621}}<br />
<br />
{{Symmetry|diagonal4}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 12]]<br />
[[Category:Moderate sparkers]]<br />
[[Category:Irreflectable duoplet sparkers]]<br />
[[Category:Unnamed periodic objects]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Acorn&diff=58773Acorn2019-03-01T02:31:31Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Methuselah<br />
|name = Acorn<br />
|pname = acorn<br />
|c = 7<br />
|bx = 7<br />
|by = 3<br />
|l = 5206<br />
|f = 633<br />
|mcps = 8<br />
|discoverer = Charles Corderman<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
}}<br />
'''Acorn''' is a [[methuselah]] found by [[:Category:Patterns found by Charles Corderman|Charles Corderman]]. It was discovered no later than [[:Category:Patterns found in 1971|1971]]<ref name=Lifeline2>[[Lifeline Volume 2]], p. 6</ref>, though its exact year of discovery is unknown. Its maximum population, 1057, occurs in generation 4408.<ref name=Lifeline3>[[Lifeline Volume 3]], p. 12</ref> Also, it is composed of 2 or 3 sparks, depending on how the left side is looked at. Despite this, 4 gliders are required for synthesis. The left spark can be flipped to create another [[isomer]] that evolves the same way, and the left spark can also be changed into a [[V spark]] pointing left.<br />
<br />
==Stable pattern==<br />
The stable pattern that results from the acorn has 633 [[cell]]s and covers an area of 215 by 168 cells; it consists of 41 [[blinker]]s (including four [[traffic light]]s), 34 [[block]]s, 30 [[beehive]]s (including one [[honey farm]]), 13 [[glider]]s, eight [[boat]]s, five [[loaf|loaves]], three [[ship]]s, two [[barge]]s, two [[pond]]s and a [[mango]].<ref>{{cite web|url=http://pentadecathlon.com/lifeNews/2005/02/new_methuselah_records.html |title=New Methuselah Records |author=Koenig, H. |date=February 21, 2005 |accessdate=January 24, 2009}}</ref> An [[eater 1]] is temporarily formed at the north side in generation 2661, but does not survive after generation 3925. Although the final population (including the number of escaping gliders) is the same as that of [[multum in parvo]], these two are unrelated in any other way.<br />
<br />
<gallery><br />
Image:Acorn_final.png|Generation 5206<br />
</gallery><br />
<br />
== Name == <br />
The name was coined by [[Robert Wainwright]] "after seeing its final [[census]]",<ref name=Lifeline2/> which he called "oak tree",<ref name=Lifeline3/> apparently alluding to the proverb "From little acorns mighty oaks do grow".<br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|filename=Acorn.html}}<br />
{{LinkLexicon|filename=lex_a.htm#acorn}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Coe%27s_p8&diff=58712Coe's p82019-02-27T03:58:09Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Coe's p8<br />
|pname = coesp8<br />
|c = 17<br />
|bx = 12<br />
|by = 8<br />
|fc = 32.1<br />
|p = 8<br />
|m = 4<br />
|h = 12.5<br />
|v = 0.90<br />
|sv = 0.90<br />
|discoverer = Tim Coe<br />
|discoveryear = 1997<br />
|rulemin = B3/S23<br />
|rulemax = B3678/S2378<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B3aijnr/S2-cn3-cen<br />
|isorulemax = B2in34ceiqtyz5-cin678/S234-aknry5eknry6-k78<br />
|synthesis = 5<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xp8_wgovnz234z33<br />
|pentadecathlonid = 17P8.2<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 4 THUMBSIZE 2 ]]<br />
}}<br />
'''Coe's p8''' is a [[period]]-[[:Category:Oscillators with period 8|8]] [[oscillator]] that was found by [[Tim Coe]] on August 19, [[:Category:Patterns found in 1997|1997]].<ref>{{CiteSummersPattern|name=all-osc}}</ref> In terms of its [[:Category:patterns with 17 cells|17]] [[cell]]s, it is tied with [[smiley]] as third-smallest known period-8 oscillator. It consists of two [[block]]s hassling an unnamed object, similar to [[blocker]]. The unnamed object is a [[hive]] predecessor that looks like two linked [[glider]]s. The spark created by the block eating can support the [[bumper]], but the [[blocker]] would be smaller for that purpose.<br />
<br />
==[[List of common oscillators|Commonness]]==<br />
Coe's p8 is about the forty-seventh most [[common]] naturally-occurring oscillator in [[Achim Flammenkamp's census]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> On [[Catagolue]], it is the third most common period 8 oscillator, being less common than the [[blocker]] but more common than [[smiley]].<ref>{{citeCatagolueStats|October 27, 2018}}</ref><br />
<br />
==Synthesis==<br />
In August, [[:Category:patterns found in 2004|2004]] [[Mark Niemiec]] found a [[:Category:patterns that can be constructed with 16 gliders|16]]-[[glider]] [[Glider synthesis|synthesis]] of this oscillator.<ref>{{CiteSummersPattern|name=jslife}}</ref> In October, [[:Category:patterns found in 2010|2010]] Martin Grant found an [[:Category:patterns that can be constructed with 8 gliders|8]]-glider synthesis, based on a [[predecessor]] discovered by Lewis Patterson.<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=279&p=3538|title=ConwayLife Forums - Thread For Your Accidental Discoveries|accessdate=Oct 3, 2010}}</ref> The best synthesis known as of July 2017 uses 5 gliders and was found by gmc_nxtman and Mark Niemec on July 8, 2017.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?f=2&t=576&start=1250#p46259|title=ConwayLife Forums - Thread for your unsure discoveries|accessdate=Jul 8, 2017}}</ref><br />
==See also==<br />
*[[Achim's p8]]<br />
*[[Blocker]]<br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkLexicon|lex_c.htm#coesp8}}<br />
{{LinkCatagolue|xp8_wgovnz234z33|patternname=Tim Coe's p8}}<br />
{{LinkPentadecathlonObject|17P8.2}}<br />
<br />
{{Symmetry|osc=turn180}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 8]]<br />
[[Category:Weak sparkers]]<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Coolout_Conjecture&diff=58639Coolout Conjecture2019-02-25T01:42:20Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Pattern<br />
|name = Coolout Conjecture<br />
|pname = cooloutconjecture<br />
|type = Problem<br />
|c = 8<br />
|bx = 6<br />
|by = 2<br />
|discoverer = Richard Schroeppel<br />
|discoveryear = 2001<br />
|rle = true<br />
}}<br />
The '''Coolout Conjecture''' is a conjecture proposed by [[Richard Schroeppel]] before 1992, and disproven by counterexample in 2001. The conjecture has been stated as:<br />
<br />
:''Given a partial Life pattern that's internally consistent with being part of a [[still life]] (i.e. each cell can be stabilized individually by a boundary cell), is there always a way to add a stabilizing boundary?<br />
<br />
or alternatively,<br />
<br />
:''If a configuration <tt>C</tt> is locally stable over a rectangle <tt>R</tt>, does there exist a configuration <tt>C*</tt> such that:''<br />
:# ''<tt>C*</tt> is locally equal to <tt>C</tt> over <tt>R</tt>; and''<br />
:# ''<tt>C*</tt> is globally stable?''<br />
<br />
In August 2001, Schroeppel published the following 6x2 pattern as a counterexample to the conjecture:<br />
<br />
<center>{{LV:Viewer|x = 6, y = 2, rule = B3/S23:P6,2<br />
2o2b2o$ob2obo!<br />
[[ THEME 6 GRID GRIDMAJOR 0 VIEWONLY THUMBNAIL ]]}}</center><br />
<br />
The row above the top edge must have six consecutive OFF cells; if it does not, the ON cells in the second and/or fifth columns will turn OFF. However, six consecutive OFF cells prevent the OFF cells in the third and fourth columns from being stabilized: without an ON neighbor above the top row, they will turn ON.<br />
<br />
By similar logic, this pattern can be shown to be a counterexample to the conjecture:<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?f=12&t=2703&hilit=coolout&start=75#p44437|title=Re: Random posts|author=BlinkerSpawn|date=June 16, 2017|accessdate=July 2, 2017|work=ConwayLife.com forums}}</ref><br />
<br />
<center>{{LV:Viewer|x = 5, y = 2, rule = B3/S23:P5,2<br />
2ob2o$obobo!<br />
[[ THEME 6 GRID GRIDMAJOR 0 VIEWONLY THUMBNAIL ]]}}</center><br />
<br />
Similarly to the original counterexample, the cells in the top row allow the center OFF cell to turn on if they are OFF and turn OFF the flanking ON cells if they are ON.<br />
Some other counterexamples have also been found<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?f=7&t=2919&start=0|title=Coolout Conjecture Counterexamples|author=wwei23|date=June 24, 2017|accessdate=July 2, 2017|work=ConwayLife.com forums}}</ref>, including this one:<br />
<br />
<center>{{LV:Viewer|x = 6, y = 2, rule = B3/S23:P6,2<br />
2ob3o$2o2bo!<br />
[[ THEME 6 GRID GRIDMAJOR 0 VIEWONLY THUMBNAIL ]]}}</center><br />
<br />
It has been shown via a small brute-force search that a 2-by-5 rectangle is the smallest bounding box that allows a counterexample to exist.<br />
<br />
== References ==<br />
<references /><br />
<br />
{{Symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Coolout_Conjecture&diff=58638Coolout Conjecture2019-02-25T01:38:38Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Pattern<br />
|name = Coolout Conjecture<br />
|pname = cooloutconjecture<br />
|type = Problem<br />
|c = 8<br />
|bx = 6<br />
|by = 2<br />
|discoverer = Richard Schroeppel<br />
|discoveryear = 2001<br />
|rle = true<br />
}}<br />
The '''Coolout Conjecture''' is a conjecture proposed by [[Richard Schroeppel]] before 1992, and disproven by counterexample in 2001. The conjecture has been stated as:<br />
<br />
:''Given a partial Life pattern that's internally consistent with being part of a [[still life]] (i.e. none of its cells die in the next generation), is there always a way to add a stabilizing boundary?<br />
<br />
or alternatively,<br />
<br />
:''If a configuration <tt>C</tt> is locally stable over a rectangle <tt>R</tt>, does there exist a configuration <tt>C*</tt> such that:''<br />
:# ''<tt>C*</tt> is locally equal to <tt>C</tt> over <tt>R</tt>; and''<br />
:# ''<tt>C*</tt> is globally stable?''<br />
<br />
In August 2001, Schroeppel published the following 6x2 pattern as a counterexample to the conjecture:<br />
<br />
<center>{{LV:Viewer|x = 6, y = 2, rule = B3/S23:P6,2<br />
2o2b2o$ob2obo!<br />
[[ THEME 6 GRID GRIDMAJOR 0 VIEWONLY THUMBNAIL ]]}}</center><br />
<br />
The row above the top edge must have six consecutive OFF cells; if it does not, the ON cells in the second and/or fifth columns will turn OFF. However, six consecutive OFF cells prevent the OFF cells in the third and fourth columns from being stabilized: without an ON neighbor above the top row, they will turn ON.<br />
<br />
By similar logic, this pattern can be shown to be a counterexample to the conjecture:<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?f=12&t=2703&hilit=coolout&start=75#p44437|title=Re: Random posts|author=BlinkerSpawn|date=June 16, 2017|accessdate=July 2, 2017|work=ConwayLife.com forums}}</ref><br />
<br />
<center>{{LV:Viewer|x = 5, y = 2, rule = B3/S23:P5,2<br />
2ob2o$obobo!<br />
[[ THEME 6 GRID GRIDMAJOR 0 VIEWONLY THUMBNAIL ]]}}</center><br />
<br />
Similarly to the original counterexample, the cells in the top row allow the center OFF cell to turn on if they are OFF and turn OFF the flanking ON cells if they are ON.<br />
Some other counterexamples have also been found<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?f=7&t=2919&start=0|title=Coolout Conjecture Counterexamples|author=wwei23|date=June 24, 2017|accessdate=July 2, 2017|work=ConwayLife.com forums}}</ref>, including this one:<br />
<br />
<center>{{LV:Viewer|x = 6, y = 2, rule = B3/S23:P6,2<br />
2ob3o$2o2bo!<br />
[[ THEME 6 GRID GRIDMAJOR 0 VIEWONLY THUMBNAIL ]]}}</center><br />
<br />
It has been shown via a small brute-force search that a 2-by-5 rectangle is the smallest bounding box that allows a counterexample to exist.<br />
<br />
== References ==<br />
<references /><br />
<br />
{{Symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Edna&diff=58267Edna2019-02-20T04:53:59Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Methuselah<br />
|name = Edna<br />
|pname = edna<br />
|c = 149<br />
|bx = 20<br />
|by = 20<br />
|l = 31192<br />
|f = 3602<br />
|mcps = 157<br />
|discoverer = Erik de Neve<br />
|discoveryear = 2010<br />
|plaintext = true<br />
|rle = true<br />
}}<br />
'''Edna''' is a [[methuselah]] with a lifespan of 31192 [[generation]]s, discovered by Erik de Neve on January 10, [[:Category:patterns found in 2010|2010]], using [[User:Nathaniel|Nathaniel Johnston]]'s [[soup]] search script,<ref>{{Cite web|url=http://www.conwaylife.com/soup/methuselahs.asp?rule=B3/S23|title=Online Life-Like CA Soup Search|accessdate=February 1, 2010}}</ref> being the first such pattern to be found with a longevity greater than that of [[Lidka]]. At the time, it was the second longest-lived known methuselah to fit within a 20&times;20 [[bounding box]] after [[Fred]], but new patterns which last longer, such as [[Wilma]], have now surfaced.<br />
<br />
The pattern is named after Methuselah's wife, Edna.<br />
<br />
==Stable pattern==<br />
The stable pattern that results from Edna (excluding 58 escaping [[glider]]s) has 3312 [[cell]]s and consists of 231 [[block]]s, 229 [[blinker]]s (including 20 [[traffic light]]s), 140 [[beehive]]s (including six [[honey farm]]s), 50 [[boat]]s, 50 [[loaf|loaves]], 12 [[pond]]s, 11 [[ship]]s, 11 [[tub]]s, two [[long boat]]s, one [[barge]], one [[eater 1]], one [[mango]], one [[ship-tie]], and one [[toad]].<br />
<br />
==Image gallery==<br />
<gallery><br />
Image:edna_2.png|A 26-[[cell]] form of Edna with lifespan 31082<br/>{{JavaRLE|edna26|brief}}<br />
Image:Sittingmouse.png|Generation 31192 of Edna (excluding escaping gliders)<br />
</gallery><br />
<br />
==See also==<br />
*[[List of long-lived methuselahs]]<br />
<br />
==References==<br />
<references/><br />
<br />
==External links==<br />
*[http://www.nathanieljohnston.com/index.php/2010/01/31192-generation-methuselah-found-in-conways-game-of-life/ Edna] on Nathaniel Johnston's blog<br />
*[http://blog.usefuldreams.org/?p=78 Edna] on Erik de Neve's blog<br />
<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Reflectorless_rotating_oscillator&diff=58266Reflectorless rotating oscillator2019-02-20T04:02:12Z<p>Hdjensofjfnen: /* Non-totalistic rules */</p>
<hr />
<div>{{Glossary}}<br />
A '''reflectorless rotating oscillator''' (or '''looping spaceship''') - abbreviated as '''RRO''' - is a pattern that rotates itself after a certain number of [[generation]]s. There is the additional constraint that two non-interacting copies of the pattern could be combined into an [[oscillator]] with a [[period]] equal to exactly half of that of the component oscillators. This is like the [[pi orbital]], but without the stabilisation.<br />
<br />
Such patterns have long been proven to exist (see [[universal constructor]]), but none were explicitly constructed in [[Life]] until the arrival of Adam P. Goucher's [[0E0P metacell]]. One of the isotropic-rule RROs listed below can be simulated using a matching arrangement of 0E0P metacells, and the result will closely resemble the chosen RRO. However, 0E0P metacells have an unalterable orientation, so the pattern after N generations never exactly matches a rotated copy of the original until the pattern returns to its original configuration. To rectify this, four disjoint copies of the resulting oscillator, each one quarter-phase apart, can be arranged into a configuration which undergoes a 90-degree rotation every quarter of its period. This still retains the loopability constraint necessary for a classical RRO.<br />
<br />
Alternatively, the term may refer to any statorless oscillator that rotates itself after a certain number of generations. The term "statorless rotating oscillator" is sometimes used to refer to these, as opposed to "classical" RROs. [[Blinker]]s or [[monogram]]s could technically be considered to be degenerate rotating oscillators, turning 90 degrees on every half-period. Rotationally symmetric objects such as [[clock II]] (or any oscillator where period = 4*mod, such as [[pinwheel]] and [[sixty-nine]]) are certainly rotating oscillators. However, most such patterns have stator cells, and more importantly they do not fulfill the additional constraint of allowing for two or more non-interacting copies of the rotor, so they are definitely not "loopable" RROs.<br />
<br />
Special-purpose true RROs could be constructed using known universal-constructor technology, which would be much simpler and lower population than a single-loop pseudo-RRO or multi-loop true RRO based on 0E0P metacells. A universal constructor-based RRO has no limit on the number of independent patterns that can orbit a single point.<br />
<br />
==Other rules==<br />
<br />
===Outer-totalistic rules===<br />
<br />
There is only one known [[elementary]] reflectorless rotating oscillator in an outer-totalistic [[Life-like cellular automaton]]. It exists in B02348/S0123, and has a period of 272. It is technically not a classical RRO, because two copies combined into a half-period oscillator interact but do not interfere with each other.<br />
<br />
<gallery><br />
File:Xp272 757w9.png|Reflectorless rotating oscillator in B02348/S0123.<br />{{LinkCatagolue|xp272_757w9|rule=b02348s0123|style=brief}}<br />Twofold: {{LinkCatagolue|xp136_w1ee5jzzgzca778|rule=b02348s0123|style=brief}}<br />
</gallery><br />
<br />
===Non-totalistic rules===<br />
Multiple reflectorless rotating oscillators have been found in [[non-totalistic]] rules, especially recently:<br />
* dmqwerty425 discovered a period-420 reflectorless rotating oscillator in B2i34ik7/S23-a4ikn5j7 on Catagolue in November 2016.<ref name="post37225" /><br />
* dani discovered a period-184 reflectorless rotating oscillator in B3/S23-a4i5i6ci in July 2017.<ref name="post46748" /><br />
* Rhombic discovered a period-72 reflectorless rotating oscillator in B2e3-a4a/S1c23-aky in August 2017.<ref name="post48366" /><br />
* Saka discovered a period-68 reflectorless rotating oscillator in B3-n4rtw5i/S23-n4q5i in August 2017.<ref name="post48513" /><br />
* 2718281828 discovered a number of loopable RROs, with 2-, 3-, 4-, 5-, and even 6-fold loopability, in July 2018.<ref name="post62035" /><br />
<br />
<gallery><br />
File:Xp420 59qkxs.png|Reflectorless rotating oscillator in B2i34ik7/S23-a4ikn5j7.<br />{{LinkCatagolue|xp420_59qkxs|rule=b2i34ik7s23-a4ikn5j7|style=brief}}<br />
</gallery><br />
<br />
===Larger than Life===<br />
One reflectorless rotating oscillator has been found in a [[Larger than Life]] rule, discovered by Dean Hickerson with a period of 552. He placed eight copies in a circle, yielding a period-69 oscillator. [[Dave Greene]] noticed that twelve copies can orbit a central point with period 46.<ref name="post43299" /><br />
<br />
<gallery><br />
File:Deanhickersons p552 RRO.png|Dean Hickerson's period-552 reflectorless rotating oscillator in the [[Larger than Life]] rule R7,C0,M1,S65..114,B65..95,NM.<br>{{LinkCatagolue|code=xp552_0gsuvvvvvuszevvv33133vvvezw377777733|rule=r7b65t95s65t114|style=brief}}<br />
File:Deanhickersons p552 RRO 12fold p46.png|Dave Greene's 12-fold, period-46 version of Dean Hickerson's period-552 RRO. apgcode unknown.<br />
</gallery><br />
<br />
==Classification==<br />
A method for classifying RROs by the amount of times they can fit into a single loop in a way that evenly divides the period has been discussed;<ref name="post47086" /> by this logic, patterns such as the p160 oscillator in [[tlife]], the p32 in B378/S23, the p88 in B36ce7c/S23-y, and the natural gun in [[Pedestrian Life]] could be classed as reflectorless rotating oscillators with a ''loopability'' of 1.<br />
<br />
==References==<br />
<references><br />
<ref name="post37225">{{LinkForumThread<br />
|f = 11<br />
|t = 1638<br />
|p = 37225<br />
|title = Soup search results in rules other than Conway's Life<br />
|format = ref<br />
}}</ref><br />
<ref name="post43299">{{LinkForumThread<br />
|f = 12<br />
|t = 2853<br />
|p = 43299<br />
|title = Abstract Art<br />
|format = ref<br />
}}</ref><br />
<ref name="post46748">{{LinkForumThread<br />
|f = 7<br />
|t = 2036<br />
|p = 46748<br />
|title = Thread for basic questions<br />
|format = ref<br />
}}</ref><br />
<ref name="post48366">{{LinkForumThread<br />
|f = 11<br />
|t = 1971<br />
|p = 48366<br />
|title = Miscellaneous Discoveries in Other Cellular Automata<br />
|format = ref<br />
}}</ref><br />
<ref name="post48513">{{LinkForumThread<br />
|f = 11<br />
|t = 376<br />
|p = 48513<br />
|title = Thread for Your Accidental Discoveries that Aren't in CGOL<br />
|format = ref<br />
}}</ref><br />
<ref name="post62035">{{LinkForumThread<br />
|f = 11<br />
|t = 3447<br />
|p = 62035<br />
|title = Reflectorless Rotating Oscillators (RRO)<br />
|format = ref<br />
}}</ref><br />
<ref name="post47086">{{LinkForumThread<br />
|format = ref<br />
|title = Re: Thread for basic non-CGOL questions<br />
|p = 47086<br />
|author = muzik<br />
|date = July 22, 2017<br />
}}</ref><br />
</references><br />
==External links==<br />
{{LinkLexicon|lex_r.htm#reflectorlessrotatingoscillator}}<br />
{{LinkForumThread|f=2|t=393|title=Rotary oscillators?}}<br />
<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Cthulhu&diff=58265Cthulhu2019-02-20T03:59:16Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Stilllife<br />
|name = Cthulhu<br />
|pname = cthulhu<br />
|type = strict<br />
|c = 45<br />
|bx = 11<br />
|by = 13<br />
|discoverer = Adam P. Goucher<br />
|discoveryear = 2016<br />
|rulemin = B/S23<br />
|rulemax = B378/S012345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B/S2-n3jnqr<br />
|isorulemax = B2ikn34cejqtwz5-qry6-ik78/S012345678<br />
|synthesis = 12<br />
|rle = true<br />
|viewerconfig = #C [[ THUMBSIZE 2 HEIGHT 480 ]]<br />
|apgcode = xs45_69e0u1u0e96zwcq3ob6z047065<br />
}}<br />
'''Cthulhu''' is a 45-cell [[still life]].<br />
<br />
One form of this still life (systematically called '''trans-Cthulhu''') was found in the [[ash]] of a random [[soup]] by [[:Category:Patterns found by Adam P. Goucher|Adam P. Goucher]] on May 3, [[:Category:Patterns found in 2016|2016]]<ref name="calcymanhaul" />, despite it being an unusually large for a natural still life. 'BlinkerSpawn' found a 15-[[glider]] [[glider synthesis|synthesis]] of Cthulhu on the same day,<ref name="15synthesis" /> which [[Mark Niemiec]] improved to [[:Category:Patterns that can be constructed with 12 gliders|12]] gliders on May 6.<ref name="mniemiec1" /><br />
<br />
Cthulhu is one of the largest known still lives to have occurred [[natural]]ly, and once ''the'' biggest; its title was taken by [[professor]] in July 2016 followed by the [[cloverleaf interchange]] in August of that year. As of February 2019, however, Cthulhu is still the largest fully [[symmetry|asymmetric]] natural still life.<br />
<br />
==cis-Cthulhu==<br />
[[File:cis-Cthulhu.png|left|frame|cis-Cthulhu<br />{{rawRLE|ciscthulhu}}]]<br />
The "tentacles" of Cthulhu are made of a [[sidewalk]] connected to the main body of the object (mainly comprising of a [[long]]³ [[hat]] stabilized by two [[bun]]s). Reflecting the sidewalk produces the [[Pattern naming|cis]]-version of Cthulhu, shown to the left; Mark Niemiec found a 13-glider synthesis on May 6.<ref name="mniemiec1" /><br />
<br />
<br style="clear:left" /><br />
<br />
==References==<br />
<references><br />
<ref name="calcymanhaul">{{cite web<br />
|url = https://catagolue.appspot.com/haul/b3s23/C1/72d138642a55725c7bef6abfc7e59483<br />
|title = Haul<br />
|author = Adam P. Goucher<br />
|work = Catagolue<br />
|date = May 3, 2016<br />
|accessdate = May 5, 2016<br />
}}</ref><br />
<ref name="15synthesis">{{cite web<br />
|url = http://www.conwaylife.com/forums/viewtopic.php?p=30605#p30605<br />
|author = BlinkerSpawn<br />
|title = Re: Soup search results<br />
|work = ConwayLife.com forums<br />
|date = May 3, 2016<br />
|accessdate = May 5, 2016<br />
}}</ref><br />
<ref name="mniemiec1">{{cite web<br />
|url = http://www.conwaylife.com/forums/viewtopic.php?p=30674#p30674<br />
|author = Mark Niemiec<br />
|title = Re: Soup search results<br />
|work = ConwayLife.com forums<br />
|date = May 6, 2016<br />
|accessdate = May 6, 2016<br />
}}</ref><br />
</references><br />
<br />
==External links==<br />
{{LinkCatagolue|xs45_69e0u1u0e96zwcq3ob6zx56074|patternname=cis-Cthulhu}}<br />
{{LinkCatagolue|xs45_69e0u1u0e96zwcq3ob6z047065|patternname=trans-Cthulhu}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=User:Hdjensofjfnen&diff=58264User:Hdjensofjfnen2019-02-20T02:29:33Z<p>Hdjensofjfnen: </p>
<hr />
<div>Hi! Hdjensofjfnen here, an amateur Life enthusiast who is usually fascinated in other non-totalistic cellular automata.<br />
Current rule interests include [http://conwaylife.com/forums/viewtopic.php?f=11&t=3779 Eatsplosion] and [http://conwaylife.com/forums/viewtopic.php?f=12&t=3512 B2ce3-ajnr/S12-ak3-a].</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=User:Hdjensofjfnen&diff=58237User:Hdjensofjfnen2019-02-19T02:13:15Z<p>Hdjensofjfnen: </p>
<hr />
<div>Hi! Hdjensofjfnen here, an amateur Life enthusiast who is usually fascinated in other non-totalistic cellular automata.</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Octagon_2&diff=58233Octagon 22019-02-19T00:46:14Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Octagon 2<br />
|pname = octagon2<br />
|c = 16<br />
|bx = 8<br />
|by = 8<br />
|fc = 29.3<br />
|p = 5<br />
|m = 5<br />
|h = 16<br />
|v = 0.80<br />
|discoverer = Arthur Taber<br />
|discoverer2 = Sol Goodman<br />
|discoveryear = 1971<br />
|rulemin = B3/S23<br />
|rulemax = B3578/S023678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3aij/S2ckn3nqy<br />
|isorulemax = B2-ae34-ew56-n78/S01c234-ar5-j678<br />
|synthesis = 6<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xp5_idiidiz01w1<br />
|pentadecathlonid = 16P5.1<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 2 THUMBSIZE 2 ]]<br />
}}<br />
'''Octagon 2''' was the first known [[period#Oscillators|period]] [[:Category:Oscillators with period 5|5]] [[oscillator]], discovered in [[:Category:Patterns found in 1971|1971]] independently by [[:Category:Patterns found by Sol Goodman|Sol Goodman]] and [[:Category:Patterns found by Arthur Taber|Arthur Taber]]; the name is due to the latter. Its discovery was first reported in [[Lifeline Volume 1]].<br />
<br />
In December 2014, forum user flipper77 discovered via a symmetric [[apgsearch]] soup that four pre-traffic lights could hassle the octagon, turning it into a period 4 oscillator.<ref name="post15094" /><br />
<br />
==[[List of common oscillators|Commonness]]==<br />
Octagon 2 is about the twenty-sixth most [[common]] naturally-occurring oscillator in [[Achim Flammenkamp's census]], being about as common as [[unix]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> On [[Catagolue]], it is the most common period 5 oscillator, being more common than [[fumarole]].<ref>{{citeCatagolueStats|October 27, 2018}}</ref><br />
<br />
==See also==<br />
*[[Octagon 4]]<br />
*[[Period_5_oscillators#Smallest|Smallest period five oscillators]]<br />
*[[Period_5_oscillators#Highest_volatility|Largest volatility period five oscillators]]<br />
<br />
==References==<br />
<references><br />
<ref name="post15094">{{LinkForumThread<br />
|format = ref<br />
|title = Re: Soup search results<br />
|p = 15094<br />
|author = flipper77<br />
|date = December 18, 2014<br />
}}</ref><br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|OctagonII.html}}<br />
{{LinkLexicon|lex_o.htm#octagonii}}<br />
{{LinkCatagolue|xp5_idiidiz01w1}}<br />
{{LinkPentadecathlonObject|16P5.1}}<br />
<br />
{{Symmetry|full}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 5]]<br />
[[Category:Weak sparkers]]<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Octagon_2&diff=58232Octagon 22019-02-19T00:44:16Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Octagon 2<br />
|pname = octagon2<br />
|c = 16<br />
|bx = 8<br />
|by = 8<br />
|fc = 29.3<br />
|p = 5<br />
|m = 5<br />
|h = 16<br />
|v = 0.80<br />
|discoverer = Arthur Taber<br />
|discoverer2 = Sol Goodman<br />
|discoveryear = 1971<br />
|rulemin = B3/S23<br />
|rulemax = B3578/S023678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3aij/S2ckn3nqy<br />
|isorulemax = B2-ae34-ew56-n78/S01c234-ar5-j678<br />
|synthesis = 6<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xp5_idiidiz01w1<br />
|pentadecathlonid = 16P5.1<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 2 THUMBSIZE 2 ]]<br />
}}<br />
'''Octagon 2''' was the first known [[period#Oscillators|period]] [[:Category:Oscillators with period 5|5]] [[oscillator]], discovered in [[:Category:Patterns found in 1971|1971]] independently by [[:Category:Patterns found by Sol Goodman|Sol Goodman]] and [[:Category:Patterns found by Arthur Taber|Arthur Taber]]; the name is due to the latter. Its discovery was first reported in [[Lifeline Volume 1]].<br />
<br />
In December 2014, forum user flipper77 discovered that four pre-traffic lights could hassle the octagon, turning it into a period 4 oscillator.<ref name="post15094" /><ref name="post47857" /><br />
<br />
==[[List of common oscillators|Commonness]]==<br />
Octagon 2 is about the twenty-sixth most [[common]] naturally-occurring oscillator in [[Achim Flammenkamp's census]], being about as common as [[unix]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> On [[Catagolue]], it is the most common period 5 oscillator, being more common than [[fumarole]].<ref>{{citeCatagolueStats|October 27, 2018}}</ref><br />
<br />
==See also==<br />
*[[Octagon 4]]<br />
*[[Period_5_oscillators#Smallest|Smallest period five oscillators]]<br />
*[[Period_5_oscillators#Highest_volatility|Largest volatility period five oscillators]]<br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|OctagonII.html}}<br />
{{LinkLexicon|lex_o.htm#octagonii}}<br />
{{LinkCatagolue|xp5_idiidiz01w1}}<br />
{{LinkPentadecathlonObject|16P5.1}}<br />
<br />
{{Symmetry|full}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 5]]<br />
[[Category:Weak sparkers]]<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Octagon_2&diff=58231Octagon 22019-02-19T00:43:26Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Octagon 2<br />
|pname = octagon2<br />
|c = 16<br />
|bx = 8<br />
|by = 8<br />
|fc = 29.3<br />
|p = 5<br />
|m = 5<br />
|h = 16<br />
|v = 0.80<br />
|discoverer = Arthur Taber<br />
|discoverer2 = Sol Goodman<br />
|discoveryear = 1971<br />
|rulemin = B3/S23<br />
|rulemax = B3578/S023678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3aij/S2ckn3nqy<br />
|isorulemax = B2-ae34-ew56-n78/S01c234-ar5-j678<br />
|synthesis = 6<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xp5_idiidiz01w1<br />
|pentadecathlonid = 16P5.1<br />
|animated = true<br />
|viewerconfig = #C [[ GPS 2 THUMBSIZE 2 ]]<br />
}}<br />
'''Octagon 2''' was the first known [[period#Oscillators|period]] [[:Category:Oscillators with period 5|5]] [[oscillator]], discovered in [[:Category:Patterns found in 1971|1971]] independently by [[:Category:Patterns found by Sol Goodman|Sol Goodman]] and [[:Category:Patterns found by Arthur Taber|Arthur Taber]]; the name is due to the latter. Its discovery was first reported in [[Lifeline Volume 1]].<br />
<br />
In December 2014, forum user flipper77 discovered that four pre-traffic lights could hassle the octagon, turning it into a period 4 oscillator.<ref name="post15094" /><br />
<br />
==[[List of common oscillators|Commonness]]==<br />
Octagon 2 is about the twenty-sixth most [[common]] naturally-occurring oscillator in [[Achim Flammenkamp's census]], being about as common as [[unix]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> On [[Catagolue]], it is the most common period 5 oscillator, being more common than [[fumarole]].<ref>{{citeCatagolueStats|October 27, 2018}}</ref><br />
<br />
==See also==<br />
*[[Octagon 4]]<br />
*[[Period_5_oscillators#Smallest|Smallest period five oscillators]]<br />
*[[Period_5_oscillators#Highest_volatility|Largest volatility period five oscillators]]<br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkWeisstein|OctagonII.html}}<br />
{{LinkLexicon|lex_o.htm#octagonii}}<br />
{{LinkCatagolue|xp5_idiidiz01w1}}<br />
{{LinkPentadecathlonObject|16P5.1}}<br />
<br />
{{Symmetry|full}}<br />
[[Category:Sparkers]]<br />
[[Category:Sparkers with period 5]]<br />
[[Category:Weak sparkers]]<br />
__NOTOC__</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Heptapole&diff=58229Heptapole2019-02-18T23:24:11Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Heptapole<br />
|pname = heptapole<br />
|f1 = Muttering moat<br />
|family = Barberpole<br />
|c = 13<br />
|bx = 10<br />
|by = 10<br />
|p = 2<br />
|m = 1<br />
|h = 14<br />
|v = 0.70<br />
|rotor = Pole 7<br />
|discoveryear = 1970<br />
|rulemin = B3/S23<br />
|rulemax = B35678/S2345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B3c/S2ae3n<br />
|isorulemax = B2ckn34-r5678/S1e2345678<br />
|synthesis = 16<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|animated = yes<br />
|viewerconfig = #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]<br />
|apgcode = xp2_31a08zy01050ko<br />
|pentadecathlonid = 13P2.2<br />
}}<br />
The '''heptapole''' (or '''septapole''') is the [[barberpole]] of length 7. Currently, it is the longest barberpole to have emerged [[natural]]ly.<br />
<br />
==See also==<br />
*[[Bipole]]<br />
*[[Tripole]]<br />
*[[Quadpole]]<br />
*[[Pentapole]]<br />
*[[Hexapole]]<br />
*[[Octapole]]<br />
<br />
==External links==<br />
{{LinkWeisstein|filename=Heptapole.html}}<br />
{{LinkLexicon|filename=lex_h.htm#heptapole}}<br />
{{LinkCatagolue|xp2_31a08zy01050ko}}<br />
{{LinkPentadecathlonObject|13P2.2}}<br />
<br />
{{Symmetry|diagonal2|osc=flip}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Orion_2&diff=58215Orion 22019-02-18T18:56:14Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Spaceship<br />
|name = Orion 2<br />
|pname = orion2<br />
|type = Tagalong<br />
|c = 32<br />
|bx = 13<br />
|by = 13<br />
|dir = Diagonal<br />
|p = 4<br />
|m = 2<br />
|s = c/4<br />
|z = c/4<br />
|h = 25.0<br />
|discoverer = Jason Summers<br />
|discoveryear = 1999<br />
|rulemin = B3/S23<br />
|rulemax = B378/S23678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-y/S2-in3-cq<br />
|isorulemax = B2n34ceqt5acij6cin78/S234centw5-q678<br />
|plaintext = true<br />
|rle = true<br />
|animated = true<br />
|viewerconfig = #C [[ TRACKLOOP 4 -1/4 -1/4 THUMBSIZE 2 GPS 4 ]]<br />
|apgcode = xq4_xe3a1zx8e705d4q2cz361<br />
|pentadecathlonid = 32P4H1V1.1<br />
}}<br />
'''Orion 2''' is a [[c/4 diagonal|c/4]] diagonal [[spaceship]] that was found by [[:Category:Patterns found by Jason Summers|Jason Summers]] in May [[:Category:Patterns found in 1999|1999]]. It consists of a [[glider]] plus a [[tagalong]] and is a smaller variant of [[Orion]]. At the time of its discovery, it superseded [[Canada goose]] as the smallest diagonal spaceship other than the glider; this title has since been taken by [[crab]].<br />
<br />
== External links ==<br />
{{LinkCatagolue|xq4_xe3a1zx8e705d4q2cz361}}<br />
{{LinkPentadecathlonObject|32P4H1V1.1}}<br />
<br />
[[Category:Glide symmetric spaceships]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=B-heptomino&diff=58134B-heptomino2019-02-15T09:39:34Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Methuselah<br />
|name = B-heptomino<br />
|pname = bheptomino<br />
|c = 7<br />
|bx = 4<br />
|by = 3<br />
|l = 148<br />
|f = 28<br />
|mcps = 7<br />
|discoverer = John Conway<br />
|discoveryear = 1970<br />
|synthesis = 2<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
}}<br />
The '''B-heptomino''' (or B-heptaplet, if the top-left cell is shifted one cell left) is a very common [[methuselah]] that evolves into three [[block]]s, two [[glider]]s and a [[ship]] after 148 generations. Compare with [[Herschel]], which appears at generation 20 of the B-heptomino's evolution. B-heptominoes acquired particular importance in [[:Category:Patterns found in 1996|1996]] due to [[:Category:Patterns found by David Buckingham|David Buckingham]]'s work on [[B track]]s.<br />
<br />
This pattern often arises with the cell at top left shifted one space to the left, producing a seven-bit [[polyplet]] that shares the same eight-bit descendant but is not technically a heptomino at all. This alternate form is shown as the input for [[elementary]] [[converter]] patterns such as [[BFx59H]] and [[BRx46B]]. Many conduits produce this form of B, so it can be used when marking the position of an output B-heptaplet.<br />
<br />
The B-heptomino is considered a failed [[puffer]] or failed [[spaceship]], since on its own it travels at c/2 for only a short time before being affected by its own trailing debris. However, it can be stabilized into a c/2 puffer or into a [[clean]] c/2 rake or spaceship. See, e.g., [[puffer 2]], [[backrake 2]], [[ecologist]], or [[pufferfish]].<br />
<br />
== In other rules ==<br />
The B-heptomino is a stable puffer in many rules.<br />
<br />
* In B3/S23-e4e, it evolves into a (16,5)c/74 [[oblique spaceship]].<br />
* In B3/S23-a, it is a glide-symmetric 10c/20 spaceship.<br />
* In B34ej5y6n/S23, it is an oblique [[Infinite growth#Quadratic|quadratic]] [[replicator]], one of only a few known.<br />
* In B36n/S2-i36c7c, it evolves into a glide-symmetric 9c/70 diagonal spaceship.<br />
<br />
==Image gallery==<br />
<gallery><br />
Image:BheptominoGen20.png|Generation 20 of the B-heptomino<br />
Image:BheptominoFinal.png|Generation 148 of the B-heptomino<br />
Image:Bparent.png|A 6-cell parent of the B-heptomino<br />
</gallery><br />
<br />
==See also==<br />
*[[C-heptomino]]<br />
*[[Conduit 1]]<br />
*[[Lifeline Volume 1]]<br />
*[[Omniperiodic]]<br />
*[[Transparent debris effect#Transparent block reaction|Transparent block reaction]]<br />
<br />
==External links==<br />
{{LinkWeisstein|B-Heptomino.html}}<br />
{{LinkLexicon|lex_b.htm#bheptomino}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Hook_with_tail&diff=58133Hook with tail2019-02-15T07:18:44Z<p>Hdjensofjfnen: /* Commonness */</p>
<hr />
<div>{{Stilllife<br />
|name = Hook with tail<br />
|pname = hookwithtail<br />
|c = 8<br />
|bx = 5<br />
|by = 4<br />
|fc = 20.5<br />
|rulemin = B/S23<br />
|rulemax = B35678/S012345678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B/S2-in3nr<br />
|isorulemax = B2ikn34-ajnr5678/S012345678<br />
|synthesis = 4<br />
|synthesisRLE = true<br />
|plaintext = true<br />
|rle = true<br />
|apgcode = xs8_32qk<br />
|pentadecathlonid = 8.5<br />
}}<br />
'''Hook with tail''' (or '''snake eater''') is an [[:Category:Strict still lifes with 8 cells|8]]-[[cell]] [[still life]]. consisting of a [[hook]] with a [[tail]]. It was for a long time the smallest still life without a well-established name; it is now a vital component of the smallest known [[heavyweight spaceship]] [[gun]], where it acts as a [[rock]].<br />
<br />
Note that, despite its name, this pattern is not truly a [[bookend]] with a tail. <br />
<br />
==[[List of common still lifes|Commonness]]==<br />
Hook with tail is the sixty-ninth most common still life in [[Achim Flammenkamp's census]], being less common than [[loaf siamese loaf]] but more common than [[long integral]]<ref>{{citeAchim|accessdate=November 8, 2009}}</ref> It is also the eightieth most common object on [[Adam P. Goucher]]'s [[Catagolue]], making it the rarest of the 8-bit still lifes.<ref>{{citeCatagolueStats|June 24, 2016}}</ref><br />
<br />
==Synthesis==<br />
On April 29, [[:Category:patterns found in 2007|2007]] [[Dean Hickerson]] found a [[:Category:patterns that can be constructed with 4 gliders|4]]-[[glider]] [[glider synthesis|synthesis]] of this still life.<ref>Dean Hickerson's [http://radicaleye.com/DRH/syntheses.html 2, 3, and 4-glider syntheses] pattern collection</ref><br />
<br />
==See also==<br />
*[[Cis-hook with tail]]<br />
*[[Claw with tail]]<br />
*[[Long hook with tail]]<br />
<br />
==References==<br />
<references/><br />
<br />
==External links==<br />
{{LinkWeisstein|HookwithTail.html}}<br />
{{LinkLexicon|lex_h.htm#hookwithtail}}<br />
{{LinkCatagolue|xs8_32qk}}<br />
{{LinkNiemiec|p1.htm#p1-8|patternname=The 9 eight-bit still-lifes}}<br />
<br />
[[Category:Eaters]]<br />
__NOTOC__<br />
<br />
[[Category:Diagonal line stabilisations]]</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Pony_express&diff=58132Pony express2019-02-15T06:57:30Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Puffer<br />
|name = Pony express<br />
|pname = ponyexpress<br />
|c = 287<br />
|bx = 74<br />
|by = 124<br />
|dir = Diagonal<br />
|p = 1152<br />
|s = c/12<br />
|discoverer = Apple Bottom<br />
|discoveryear = 2015<br />
|rle = true<br />
|animated = true<br />
|apgcode = yl1152_1_275_a3591abbc6ddbf461332c01353cae282<br />
|viewerconfig = #C [[ THUMBSIZE 2 AUTOSTART GPS 60 TRACK 1/12 1/12 WIDTH 480 HEIGHT 480 ZOOM 3 ]]<br />
}}<br />
'''Pony express''' was the first completely [[natural]] [[infinite growth]] pattern to emerge from soup that was neither the [[block-laying switch engine]] nor the [[glider-producing switch engine]], instead being a combination of both of these. It was found by Apple Bottom using [[Adam P. Goucher]]'s [[apgsearch]] script on September 16, [[:Category:Patterns found in 2015|2015]], but was not added to the [[Catagolue]] census until September 28.<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=23022#p23022|author=Apple Bottom|work=ConwayLife.com forums|title=Re: apgsearch v2.2|accessdate=November 3, 2018|date=September 27, 2015}}</ref><ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=23059#p23059|author=Adam P. Goucher|work=ConwayLife.com forums|title=Re: Soup search results|accessdate=November 3, 2018|date=September 28, 2015}}</ref><br />
<br />
==Gallery==<br />
<gallery><br />
File:Ponyexpress samplesoup gen5000.png|Generation 5000 of the soup the pony express was first found in, excluding escaped gliders.<br />
</gallery><br />
<br />
==References==<br />
<references /><br />
<br />
==External links==<br />
{{LinkCatagolue|yl1152_1_275_a3591abbc6ddbf461332c01353cae282}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Dueling_banjos&diff=58131Dueling banjos2019-02-15T06:55:26Z<p>Hdjensofjfnen: /* Related patterns */</p>
<hr />
<div>{{Oscillator<br />
|name = Dueling banjos<br />
|pname = duelingbanjos<br />
|c = 62<br />
|bx = 25<br />
|by = 20<br />
|p = 24<br />
|m = 24<br />
|h = 33<br />
|v = 0.86<br />
|sv = 0.86<br />
|discoverer = Apple Bottom<br />
|discoveryear = 2019<br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-k/S23<br />
|isorulemax = B34e6c7c8/S234cz5e6ikn7e8<br />
|synthesis = 19<br />
|synthesisRLE = true<br />
|rle = true<br />
|apgcode = xp24_cc0f9x21hxh12x9f0cczy3699d303d996zzy0o8a6y56a8o<br />
|viewerconfig = #C [[ AUTOSTART GPS 12 LOOP 24 THUMBSIZE 3 ZOOM 16 HEIGHT 480 ]]<br />
}}<br />
<br />
'''Dueling banjos''' is a [[period]] [[:Category:Oscillators with period 24|24]] [[oscillator]] found (in tetramer form, via [[apgsearch]]) by [[Apple Bottom]] on January 10, {{year|2019}}. It consists of two [[B-heptomino]]s being [[hassle]]d by two [[eater 1]]s and two [[block on table]]s.<br />
<br />
[[Matthias Merzenich]] provided a monomer form which has cis-in, cis-out and trans isomers depending on the relative positions of the two [[block]]s.<ref name="post67718" /><br />
<br />
[[Mark Niemiec]] posted a 19-glider synthesis of the oscillator on January 13th.<ref name="post67832" /><br />
<br />
==Related patterns==<br />
<br />
Starting from an initial p24 gun by [[Tanner Jacobi]],<ref name="post67786" /> Matthias Merzenich found a way to adjust the [[sparker]]s ([[HW emulator]], [[44P12.3]] and [[pipsquirter 1]]) to produce a [[true]] period gun with a slightly smaller bounding box than the previous record-holder, [[p24 gun]].<ref name="post67805" /> The population is somewhat larger, but this is not considered for most record-keeping purposes. The 44P12.3 and the pipsquirter 1 can each be placed in two possible orientations, allowing for the optimized P48 [[LWSS]] gun below.<ref name="post67883" /><br />
<br />
<br />
{{EmbedViewer<br />
|viewerconfig = #C [[ AUTOSTART GPS 6 LOOP 2400 THUMBLAUNCH THUMBSIZE 3 THEME 6 ZOOM 10 HEIGHT 400 ]]<br />
|pname = duelingbanjosp24gun<br />
|position = left<br />
|caption = Period 24 gun based on dueling banjos<br /><br />
}}<br />
<br />
{{EmbedViewer<br />
|viewerconfig = #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 3 THEME 6 ZOOM 10 WIDTH 480 HEIGHT 480 ]]<br />
|pname = duelingbanjostetramer<br />
|position = right<br />
|caption = Original dueling banjos tetramer from [[Catagolue]]<br /><br />
}}<br />
<br />
{{EmbedViewer<br />
|viewerconfig = #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 6 WIDTH 480 HEIGHT 480 ]]<br />
|pname = p48lwss<br />
|position = center<br />
|caption = Period 48 LWSS gun using three of the<br />dueling banjos p24 glider guns<br /><br />
}}<br />
<br />
==References==<br />
<references><br />
<ref name="post67718">{{LinkForumThread<br />
|p = 67718<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
<ref name="post67786">{{LinkForumThread<br />
|p = 67786<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Tanner Jacobi<br />
|format = ref<br />
}}</ref><br />
<ref name="post67805">{{LinkForumThread<br />
|p = 67805<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
<ref name="post67832">{{LinkForumThread<br />
|p = 67832<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Mark D. Niemiec<br />
|format = ref<br />
}}</ref><br />
<ref name="post67883">{{LinkForumThread<br />
|p = 67883<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Adam P. Goucher<br />
|format = ref<br />
}}</ref><br />
</references><br />
<br />
==External links==<br />
{{LinkCatagolue|xp24_cc0f9x21hxh12x9f0cczy3699d303d996zzy0o8a6y56a8o|patternname=Cis-in-Dueling banjos}}<br />
{{LinkCatagolue|xp24_330f9x21hxh12x9f033zy3699d303d996zzy0o8a6y56a8o|patternname=Cis-out-Dueling banjos}}<br />
{{LinkCatagolue|xp24_330f9x21hxh12x9f0cczy3699d303d996zzy0o8a6y56a8o|patternname=Trans-Dueling banjos}}<br />
{{LinkCatagolue|xp24_y3cc0f9x21hxh12x9f0cczwccy6699d303d996y6ccz3113wggyjggw3113z61w4f847yh748f4w16z68w2fhieyheihf2w86zc88cyrc88czw33y6699rc0cr996y633zy3330f9x488x884x9f033|patternname=Dueling banjos (four-fold variant)}}<br />
<br />
{{symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Dueling_banjos&diff=58130Dueling banjos2019-02-15T06:55:09Z<p>Hdjensofjfnen: /* Related patterns */</p>
<hr />
<div>{{Oscillator<br />
|name = Dueling banjos<br />
|pname = duelingbanjos<br />
|c = 62<br />
|bx = 25<br />
|by = 20<br />
|p = 24<br />
|m = 24<br />
|h = 33<br />
|v = 0.86<br />
|sv = 0.86<br />
|discoverer = Apple Bottom<br />
|discoveryear = 2019<br />
|rulemin = B3/S23<br />
|rulemax = B38/S238<br />
|rulespecial = [[Conway's Game of Life|Conway Life]]<br />
|isorulemin = B3-k/S23<br />
|isorulemax = B34e6c7c8/S234cz5e6ikn7e8<br />
|synthesis = 19<br />
|synthesisRLE = true<br />
|rle = true<br />
|apgcode = xp24_cc0f9x21hxh12x9f0cczy3699d303d996zzy0o8a6y56a8o<br />
|viewerconfig = #C [[ AUTOSTART GPS 12 LOOP 24 THUMBSIZE 3 ZOOM 16 HEIGHT 480 ]]<br />
}}<br />
<br />
'''Dueling banjos''' is a [[period]] [[:Category:Oscillators with period 24|24]] [[oscillator]] found (in tetramer form, via [[apgsearch]]) by [[Apple Bottom]] on January 10, {{year|2019}}. It consists of two [[B-heptomino]]s being [[hassle]]d by two [[eater 1]]s and two [[block on table]]s.<br />
<br />
[[Matthias Merzenich]] provided a monomer form which has cis-in, cis-out and trans isomers depending on the relative positions of the two [[block]]s.<ref name="post67718" /><br />
<br />
[[Mark Niemiec]] posted a 19-glider synthesis of the oscillator on January 13th.<ref name="post67832" /><br />
<br />
==Related patterns==<br />
<br />
Starting from an initial p24 gun by [[Tanner Jacobi]],<ref name="post67786" /> Matthias Merzenich found a way to adjust the [[sparker]]s ([[HW emulator]], [[44P12.3]] and [[pipsquirter 1]]) to produce a [[true]] period gun with a slightly smaller bounding box than the previous record-holder, [[p24 gun]].<ref name="post67805" /> The population is somewhat larger, but this is not considered for most record-keeping purposes. The 44P12.1 and the pipsquirter 1 can each be placed in two possible orientations, allowing for the optimized P48 [[LWSS]] gun below.<ref name="post67883" /><br />
<br />
<br />
{{EmbedViewer<br />
|viewerconfig = #C [[ AUTOSTART GPS 6 LOOP 2400 THUMBLAUNCH THUMBSIZE 3 THEME 6 ZOOM 10 HEIGHT 400 ]]<br />
|pname = duelingbanjosp24gun<br />
|position = left<br />
|caption = Period 24 gun based on dueling banjos<br /><br />
}}<br />
<br />
{{EmbedViewer<br />
|viewerconfig = #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 3 THEME 6 ZOOM 10 WIDTH 480 HEIGHT 480 ]]<br />
|pname = duelingbanjostetramer<br />
|position = right<br />
|caption = Original dueling banjos tetramer from [[Catagolue]]<br /><br />
}}<br />
<br />
{{EmbedViewer<br />
|viewerconfig = #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 6 WIDTH 480 HEIGHT 480 ]]<br />
|pname = p48lwss<br />
|position = center<br />
|caption = Period 48 LWSS gun using three of the<br />dueling banjos p24 glider guns<br /><br />
}}<br />
<br />
==References==<br />
<references><br />
<ref name="post67718">{{LinkForumThread<br />
|p = 67718<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
<ref name="post67786">{{LinkForumThread<br />
|p = 67786<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Tanner Jacobi<br />
|format = ref<br />
}}</ref><br />
<ref name="post67805">{{LinkForumThread<br />
|p = 67805<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Matthias Merzenich<br />
|format = ref<br />
}}</ref><br />
<ref name="post67832">{{LinkForumThread<br />
|p = 67832<br />
|title = Re: Oscillator Discussion Thread<br />
|author = Mark D. Niemiec<br />
|format = ref<br />
}}</ref><br />
<ref name="post67883">{{LinkForumThread<br />
|p = 67883<br />
|title = Re: Execution of Old Guns by Variable-Speed Firing Squad<br />
|author = Adam P. Goucher<br />
|format = ref<br />
}}</ref><br />
</references><br />
<br />
==External links==<br />
{{LinkCatagolue|xp24_cc0f9x21hxh12x9f0cczy3699d303d996zzy0o8a6y56a8o|patternname=Cis-in-Dueling banjos}}<br />
{{LinkCatagolue|xp24_330f9x21hxh12x9f033zy3699d303d996zzy0o8a6y56a8o|patternname=Cis-out-Dueling banjos}}<br />
{{LinkCatagolue|xp24_330f9x21hxh12x9f0cczy3699d303d996zzy0o8a6y56a8o|patternname=Trans-Dueling banjos}}<br />
{{LinkCatagolue|xp24_y3cc0f9x21hxh12x9f0cczwccy6699d303d996y6ccz3113wggyjggw3113z61w4f847yh748f4w16z68w2fhieyheihf2w86zc88cyrc88czw33y6699rc0cr996y633zy3330f9x488x884x9f033|patternname=Dueling banjos (four-fold variant)}}<br />
<br />
{{symmetry|orthogonal2}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=PT8P&diff=58129PT8P2019-02-15T06:52:14Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Conduit<br />
|name = PT8P<br />
|pname = pt8p<br />
|type = elementary<br />
|conduitfor = pi<br />
|c = 15<br />
|m = T<br />
|step = 8<br />
|spartan = no<br />
|rle = false<br />
|viewerconfig = #C [[ LOOP 9 ZOOM 16 GPS 2 PAUSE 2 T 8 PAUSE 2 WIDTH 480 HEIGHT 480 THUMBSIZE 2 ]]<br />
}}<br />
'''PT8P''' is a small [[pi]] conduit. It can be replaced with many different periodical versions. It can be used to form a closed loop, the [[gourmet]], [[popover]], [[pi portraitor]], or [[Tanner's p46]].</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Gourmet&diff=58128Gourmet2019-02-15T06:48:17Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Gourmet<br />
|pname = gourmet<br />
|f1 = Shuttle<br />
|c = 66<br />
|bx = 20<br />
|by = 20<br />
|p = 32<br />
|m = 8<br />
|h = 6.3<br />
|v = 0.60<br />
|sv = 0.60<br />
|discoverer = David Buckingham<br />
|discoveryear = 1978<br />
|rulemin = B3/S23<br />
|rulemax = B368/S23678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B3-cekq/S2-n3-ky<br />
|isorulemax = B34cekwyz5ak67c8/S234cejknwz5-cjny678<br />
|plaintext = true<br />
|rle = true<br />
|animated = true<br />
|apgcode = xp32_wg4cx178kc0c4gozwdl8y0kksy1ggoz311y82lmzw31460652sgx641<br />
|pentadecathlonid = 66P32.1<br />
}}<br />
'''Gourmet''' is a [[period]] [[:Category:Oscillators with period 32|32]] [[oscillator]] that was discovered by [[:Category:Patterns found by David Buckingham|David Buckingham]] on March 4, [[:Category:Patterns found in 1978|1978]].<ref>{{CiteHickersonOscillators}}</ref> It consists of four [[cis-boat with tail]]s and four [[aircraft carrier]]s [[hassle|hassling]] a [[pi-heptomino]].<br />
<br />
Despite gourmet's similarity with [[Tanner's p46]], the latter was not discovered until 2017.<br />
<br />
==Image gallery==<br />
{|<br />
|-<br />
|[[Image:gourmet_gen1.png|framed|left|Generation 1 reveals that the object being hassled is a pi-heptomino]].<br />
|[[Image:alternate_gourmet.png|framed|left|An alternate form of gourmet using [[beacon]]s and [[snake]]s instead of aircraft carriers<br/>{{JavaRLE|Alternategourmet}}]]<br />
|}<br />
<br />
==See also==<br />
*[[PT8P]]<br />
*[[Pi orbital]]<br />
*[[Pi portraitor]]<br />
*[[Popover]]<br />
*[[Tanner's p46]]<br />
<br />
==References==<br />
<references/><br />
<br />
==External links==<br />
{{LinkWeisstein|Gourmet.html}}<br />
{{LinkLexicon|lex_g.htm#gourmet}}<br />
{{LinkCatagolue|xp32_wg4cx178kc0c4gozwdl8y0kksy1ggoz311y82lmzw31460652sgx641}}<br />
{{LinkPentadecathlonObject|66P32.1}}<br />
<br />
{{Symmetry|osc=turn90}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Gourmet&diff=58127Gourmet2019-02-15T06:47:26Z<p>Hdjensofjfnen: </p>
<hr />
<div>{{Oscillator<br />
|name = Gourmet<br />
|pname = gourmet<br />
|f1 = Shuttle<br />
|c = 66<br />
|bx = 20<br />
|by = 20<br />
|p = 32<br />
|m = 8<br />
|h = 6.3<br />
|v = 0.60<br />
|sv = 0.60<br />
|discoverer = David Buckingham<br />
|discoveryear = 1978<br />
|rulemin = B3/S23<br />
|rulemax = B368/S23678<br />
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]]<br />
|isorulemin = B3-cekq/S2-n3-ky<br />
|isorulemax = B34cekwyz5ak67c8/S234cejknwz5-cjny678<br />
|plaintext = true<br />
|rle = true<br />
|animated = true<br />
|apgcode = xp32_wg4cx178kc0c4gozwdl8y0kksy1ggoz311y82lmzw31460652sgx641<br />
|pentadecathlonid = 66P32.1<br />
}}<br />
'''Gourmet''' is a [[period]] [[:Category:Oscillators with period 32|32]] [[oscillator]] that was discovered by [[:Category:Patterns found by David Buckingham|David Buckingham]] on March 4, [[:Category:Patterns found in 1978|1978]].<ref>{{CiteHickersonOscillators}}</ref> It consists of four [[cis-boat with tail]]s and four [[aircraft carrier]]s [[hassle|hassling]] a [[pi-heptomino]].<br />
Despite gourmet's similarity with [[Tanner's p46]], the latter was not discovered until 2017.<br />
<br />
==Image gallery==<br />
{|<br />
|-<br />
|[[Image:gourmet_gen1.png|framed|left|Generation 1 reveals that the object being hassled is a pi-heptomino]].<br />
|[[Image:alternate_gourmet.png|framed|left|An alternate form of gourmet using [[beacon]]s and [[snake]]s instead of aircraft carriers<br/>{{JavaRLE|Alternategourmet}}]]<br />
|}<br />
<br />
==See also==<br />
*[[PT8P]]<br />
*[[Pi orbital]]<br />
*[[Pi portraitor]]<br />
*[[Popover]]<br />
*[[Tanner's p46]]<br />
<br />
==References==<br />
<references/><br />
<br />
==External links==<br />
{{LinkWeisstein|Gourmet.html}}<br />
{{LinkLexicon|lex_g.htm#gourmet}}<br />
{{LinkCatagolue|xp32_wg4cx178kc0c4gozwdl8y0kksy1ggoz311y82lmzw31460652sgx641}}<br />
{{LinkPentadecathlonObject|66P32.1}}<br />
<br />
{{Symmetry|osc=turn90}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Snark&diff=58068Snark2019-02-14T05:59:27Z<p>Hdjensofjfnen: Not necessary, really. I think it says on the eater page that it functions as a one-time reflector</p>
<hr />
<div>{{Reflector<br />
|name = Snark<br />
|pname = snark<br />
|type = Stable<br />
|c = 52<br />
|bx = 23<br />
|by = 17<br />
|a = 90<br />
|p = 43<br />
|discoverer = Mike Playle<br />
|discoveryear = 2013<br />
|synthesis = 22<br />
|synthesisRLE = true<br />
|rle = true<br />
|viewerconfig = #C [[ WIDTH 600 HEIGHT 600 X 3 Y -3 THUMBSIZE 2 ZOOM 20 GPS 30 LOOP 128 ]]<br />
}}<br />
The '''Snark''' is a 90° [[Stable reflector|stable glider reflector]] discovered by [[Mike Playle]] in April 2013.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=7819#p7819|title=Just the place for a Snark!|author=Mike Playle|date=April 25, 2013|accessdate=March 27, 2016}}</ref> It is made up of two [[Eater_1|eaters]], a [[block]] and a [[31.4]], the heart of the Snark. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the [[population]] and the [[bounding box]]. Another commonly-used stabilization of the catalyst is 34 bits, and many other variants are available. For a color-changing one, see the reflector in the [[stable reflector]] article, or use a [[bouncer]] (periodic).<br />
<br />
{{EmbedViewer<br />
|position = center<br />
|viewerconfig = #C [[ THEME 6 GRID GRIDMAJOR 0 ZOOM 8 HEIGHT 480 THUMBLAUNCH THUMBSIZE 2 ]]<br />
|pname = snarkcatalystvariants<br />
|caption = four Snark catalyst variants --<br /><div align="left"><br />
<pre>Top: original variant by Mike Playle<br />
Left: Shannon Omick (better clearance on a diagonal)<br />
Right: Heinrich Koenig (better clearance on a different diagonal)<br />
Bottom: Simon Ekström (better clearance on two diagonals)</pre></div><br />
}}<br />
<br />
The base reaction was discovered by [[Dietrich Leithner]] about 1998, but it consumed another block.<ref>{{Cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=335#p1939|title=Re: Incomplete search patterns - try to complete|author=Adam P. Goucher|date=February 17, 2010|accessdate=May 8, 2013}}</ref> A [[catalyst]] that could replace the block was found with [[Bellman]], a program for searching catalytic reactions developed by [[Mike Playle]].<br />
<br />
Given its small [[repeat time]], the snark made [[oscillator]]s of previously unknown periods of [[:Category:Oscillators with period 43|43]] and [[:Category:Oscillators with period 53|53]] trivial.<ref>{{cite web|url=<br />
http://conwaylife.com/forums/viewtopic.php?p=7820#p7820|title=Re: Just the place for a Snark!|author=Matthias Merzenich|date=April 25, 2013|accessdate=March 27, 2016}}</ref><br />
It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. <ref>{{cite web|url=<br />
http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1082&start=25#p7901|title=Re: Just the place for a Snark!|author=Dave Greene|date=June 8, 2013|accessdate=April 5, 2017}}</ref><br />
<br />
[[File:p4_snark.png|200px|thumb|center|The [[period 4 reflector]] with repeat time 52 was used for p52+4n glider streams before the [[snark]] was discovered.]]<br />
<br />
== References ==<br />
<references/><br />
<br />
== External links ==<br />
{{LinkLexicon|lex_s.htm#snark}}</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=User:Hdjensofjfnen&diff=22131User:Hdjensofjfnen2016-03-09T23:51:31Z<p>Hdjensofjfnen: Created page with "Hi, I'm Hdjensofjfnen. There's not much about me on this user page but you can look for my account on Wikipedia with the same name."</p>
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<div>Hi, I'm Hdjensofjfnen. There's not much about me on this user page but you can look for my account on Wikipedia with the same name.</div>Hdjensofjfnenhttps://conwaylife.com/w/index.php?title=Lightweight_spaceship&diff=22130Lightweight spaceship2016-03-09T23:49:52Z<p>Hdjensofjfnen: </p>
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<div>{{Spaceship|name=Lightweight Spaceship|bx=5|by=5|h=11|pname=lwss|dir=Orthogonal|p=4|s=c/2|c=9|discoverer=John Conway||discoveryear=1970|life105=true|life106=true|plaintext=true|rle=true|animated=true|synthesis=3|synthesisRLE=true|rulespecial=[[Conway's Game of Life|Conway Life]], [[HighLife]]|rulemin=B3/S23|rulemax=B3468/S2378}}<br />
The '''lightweight spaceship''' (or '''LWSS''' for short or '''small fish'''<ref>{{cite web|url=http://www.argentum.freeserve.co.uk/lex_s.htm#smallfish |title=Small fish |work=The Life Lexicon |publisher=Stephen Silver |accessdate=June 10, 2009}}</ref>) is the smallest orthogonally moving [[spaceship]], and the second most common spaceship (after the [[glider]]). Random soups will emit one LWSS for approximately every 615 gliders.<ref>{{cite web|url=http://wwwhomes.uni-bielefeld.de/achim/moving.html |title=Spontaneous appeared Spaceships out of Random Dust |publisher=Achim Flammenkamp |date=December 9, 1995|accessdate=August 18, 2011}}</ref> It moves orthogonally at [[c/2 orthogonal|c/2]] and has [[period]] [[:Category:Spaceships with period 4|4]]. It was found by [[John Conway]] in [[:Category:Patterns found in 1970|1970]]. Interestingly, if two LWSS collide, they produce two gliders.<br />
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==Tagalong==<br />
In April [[:Category:Patterns found in 1992|1992]], [[David Bell]] found a [[tagalong]] for two lightweight spaceships (or two [[middleweight spaceship]]s or two [[heavyweight spaceship]]s). It can be extended indefinitely by attaching it to the back of itself.<br />
Interestingly, a [[hivenudger]] with symmetric rear (that is, both rear spaceships being of same "weight") can pull this tagalong.<br />
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[[Image:LWSS_tagalong.png|framed|center|Tagalong for two lightweight spaceships<br />{{JavaRLE|lwsstagalong}}]]<br />
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==See also==<br />
*[[Heavyweight spaceship]]<br />
*[[Infinite LWSS hotel]]<br />
*[[Middleweight spaceship]]<br />
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==References==<br />
<references /><br />
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==External links==<br />
{{LinkWeisstein|LightweightSpaceship.html}}<br />
{{LinkLexicon|lex_l.htm#lwss}}<br />
[[Category:Glide symmetric spaceships]]</div>Hdjensofjfnen