Difference between revisions of "X66"

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{{Spaceship
{{Spaceship
|name         = x66
|name             = x66
|pname       = x66
|pname           = x66
|c           = 34
|c               = 34
|bx           = 9
|bx               = 9
|by           = 11
|by               = 11
|dir         = Orthogonal
|dir             = Orthogonal
|p           = 4
|p               = 4
|s           = c/2
|m                = 4
|h           = 31
|s               = c/2
|discoverer   = Hartmut Holzwart
|z                = 2c/4
|discoveryear = 1992
|h               = 31
|synthesis    = 13
|discoverer       = Hartmut Holzwart
|synthesisRLE = true
|discoveryear     = 1992
|life105     = true
|rulemin          = B3/S23
|life106      = true
|rulemax          = B378/S2378
|plaintext   = true
|rulespecial     = [[Conway's Game of Life|Conway Life]]
|rle         = true
|isorulemin      = B3-cy/S2-n3-ceky
|animated    = true
|isorulemax      = B34ejkq5-ajk6-ai78/S234-ajkqw5-iqy6-a78
|synthesis        = 12
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|animated         = true
|viewerconfig     = #C [[ TRACKLOOP 4 -1/2 0 THUMBSIZE 2 GPS 4 ]]
|apgcode          = xq4_0oorxroozdjio404oijd
|pentadecathlonid = 34P4H2V0.23
|eppsteinid      = 10240
}}
}}
'''x66''' is a [[period]] [[:Category:Spaceships with period 4|4]] [[spaceship]] with [[speed]] [[c/2 orthogonal|c/2]] that was found by [[:Category:Patterns found by Hartmut Holzwart|Hartmut Holzwart]] in July [[:Category:Patterns found in 1992|1992]]. One of the symmetric halves can alternatively be escorted by a [[heavyweight spaceship]]. Its name refers to the fact that every [[cell]] (alive or dead) has at most 6 live [[Moore neighbourhood|neighbours]] (in contrast to spaceships based on [[lightweight spaceship]]s, [[middleweight spaceship]]s, or heavyweight spaceships). In fact, this spaceship was found via a search with this restriction. From this follows that the spaceship is stable also in Life-like rules allowing birth or survival for a cell with 7 or 8 neighbors.
'''x66''' is a [[period]] [[:Category:Spaceships with period 4|4]] [[spaceship]] with [[speed]] [[c/2 orthogonal|c/2]] that was found by [[:Category:Patterns found by Hartmut Holzwart|Hartmut Holzwart]] in July [[:Category:Patterns found in 1992|1992]]. One of the symmetric halves can alternatively be escorted by a [[heavyweight spaceship]]. Its name refers to the fact that every [[cell]] (alive or dead) has at most 6 live [[Moore neighbourhood|neighbours]] (in contrast to spaceships based on [[lightweight spaceship]]s, [[middleweight spaceship]]s, or heavyweight spaceships). In fact, this spaceship was found via a search with this restriction. From this follows that the spaceship is stable also in Life-like rules allowing birth or survival for a cell with 7 or 8 neighbors.


x66 was first synthesized on January 11, 2015, requiring 166 gliders. After the emergence of this spaceship in a symmetrical soup on March 8, 2015,<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=17556#p17556|title=Re: Soup search results|author=flipper77|date=March 8, 2015|accessdate=March 18, 2016}}</ref> this was drastically reduced to 13 gliders.
x66 was first synthesized on January 11, {{year|2015}}, requiring 162 gliders.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=15974#p15974|title=Re: Small Spaceship Syntheses|author=Martin Grant|date=January 11, 2015|accessdate=March 18, 2019}}</ref> After the emergence of this spaceship in a symmetrical soup on March 8, 2015,<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=17556#p17556|title=Re: Soup search results|author=flipper77|date=March 8, 2015|accessdate=March 18, 2016}}</ref> this was drastically reduced to 13 gliders,<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=17570#p17570|title=Re: Soup search results|author=Chris Cain|date=March 8, 2015|accessdate=March 18, 2019}}</ref> and then to 12 gliders in {{year|2018}}.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=55127#p55127|title=Re: Small Spaceship Syntheses|author=2718281828|date=January 15, 2018|accessdate=March 18, 2019}}</ref>


Half of x66 can be supported by a [[heavyweight spaceship]].
Half of x66 can be supported by a [[heavyweight spaceship]]. Since the heavyweight spaceship is glide symmetric, it can support two halves at once, or one half alongside a [[sidecar]].


==Image gallery==
==Image gallery==
Line 42: Line 51:
{{LinkEppstein|10240}}
{{LinkEppstein|10240}}
{{LinkCatagolue|xq4_0oorxroozdjio404oijd|patternname=x66}}
{{LinkCatagolue|xq4_0oorxroozdjio404oijd|patternname=x66}}
{{LinkPentadecathlonObject|34P4H2V0.23}}


{{Symmetry|orthogonal2}}
{{seminatural}}
{{DISPLAYTITLE:x66}}
{{DISPLAYTITLE:x66}}
__NOTOC__

Revision as of 19:39, 26 June 2019

x66
2bo$2o$o2b3o2bo$o4b3o$b3o2b2o2$b3o2b2o$o4b3o$o2b3o2bo$2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 -1/2 0 THUMBSIZE 2 GPS 4 ]]
View animated image
View static image
Pattern type Spaceship
Number of cells 34
Bounding box 9 × 11
Direction Orthogonal
Period 4
Mod 4
Speed c/2 | 2c/4
Heat 31
Discovered by Hartmut Holzwart
Year of discovery 1992

x66 is a period 4 spaceship with speed c/2 that was found by Hartmut Holzwart in July 1992. One of the symmetric halves can alternatively be escorted by a heavyweight spaceship. Its name refers to the fact that every cell (alive or dead) has at most 6 live neighbours (in contrast to spaceships based on lightweight spaceships, middleweight spaceships, or heavyweight spaceships). In fact, this spaceship was found via a search with this restriction. From this follows that the spaceship is stable also in Life-like rules allowing birth or survival for a cell with 7 or 8 neighbors.

x66 was first synthesized on January 11, 2015, requiring 162 gliders.[1] After the emergence of this spaceship in a symmetrical soup on March 8, 2015,[2] this was drastically reduced to 13 gliders,[3] and then to 12 gliders in 2018.[4]

Half of x66 can be supported by a heavyweight spaceship. Since the heavyweight spaceship is glide symmetric, it can support two halves at once, or one half alongside a sidecar.

Image gallery

File:X66 half.png
Half of x66 supported by a heavyweight spaceship
RLE: here

See also

References

  1. ↑ Martin Grant (January 11, 2015). "Re: Small Spaceship Syntheses". Retrieved on March 18, 2019.
  2. ↑ flipper77 (March 8, 2015). "Re: Soup search results". Retrieved on March 18, 2016.
  3. ↑ Chris Cain (March 8, 2015). "Re: Soup search results". Retrieved on March 18, 2019.
  4. ↑ 2718281828 (January 15, 2018). "Re: Small Spaceship Syntheses". Retrieved on March 18, 2019.

External links


Retrieved from "https://conwaylife.com/w/index.php?title=X66&oldid=62079"