Still Life Synthesis Thread

[get_snackeTWO]

... could someone find me a synthesis of either of these three predecessors of the induction coil (in which all gliders are coming from the bottom side of the coil)?

I cannot see immediately how to work with these predecessors, and so I need to try some more soups out. For instance, this soup suggests a 2-stage 7-glider recipe (which does not meet your requirement though):

Code: Select all

RLE xd

it's fine as long as the gliders do not pass through when mirrored.

i can't do anything to search for a recipe since my device is restricted from downloading certain files/folders (e.g., programs).

[AlbertArmStain]

Synthesis for xs29_08ehbgn96z6607426:

Code: Select all

x = 396, y = 95, rule = B3/S23
199bo$199bobo$199b2o31$60bo$60bobo$60b2o88bo$57bo90bobo$55bobo91b2o$56b
2o65bo34b2o114bobo$121bobo34b2o114b2o$122b2o24b2o125bo$149b2o$148bo124b
o$271bobo$129bo142b2o$130b2o$129b2o180bo71bobo$268bo9bobo28bobo61bobo
7b2o$269bo8b2o30b2o27bo34b2o8bo$267b3o9bo60bo33bo15bo$306b2o30b3o49bo
bo$307b2o36bo44b2o$138b2o166bo5bo31bobo32b2o$137bobo171bobo31bobo30bo
2bo$139bo172b2o32b2o30bo2bo6b2o$bobo61b2o99b2o106b2o38b2o32b2o29b2ob2o
4bobo$2b2o60bo2bo97bo2bo105bo7b2o30bo33bo33bo5bo4b3o$2bo62bobo98bobo95b
3o4b2obo7bobo26b2obo30b2obo30b2obo10bo$54b2o10bo88b2o10bo98bo3bo2bob2o
5bo27bo2bob2o27bo2bob2o27bo2bob2o9bo$54b2o99b2o108bo3bobo3bo33bobo3bo
27bobo3bo27bobo3bo$b2o266bobobobo33bobobobo27bobobobo27bobobobo$2o268b
2ob2o35b2ob2o29b2ob2o29b2ob2o$2bo122b2o5b2o$124bobo6b2o$126bo5bo3$21b
2o$21bobo$21bo20$210b2o$210bobo$210bo$99bo$99b2o$98bobo!

It didn't have a synthesis yet because someone decided to combine it into a single step, which is the worst thing people do when submitting syntheses to Catagolue

Code: Select all

x = 325, y = 99, rule = B3/S23
199bo$199bobo$199b2o13$245bo67bo$243bobo66bo5bobo$244b2o59bo6b3o3b2o$
304bo14bo$304b3o11$300bo$299bo$290bo8b3o$60bo191bo35b2o$60bobo190b2o
34b2o13bobo$60b2o88bo101b2o42bo7b2o$57bo90bobo144bo9bo$55bobo91b2o144b
3o$56b2o65bo34b2o95bo7bo10bobo$121bobo34b2o93bobo8bo9b2o$122b2o24b2o
104b2o6b3o10bo$149b2o$148bo124bo$271bobo$129bo142b2o$130b2o$129b2o$
268bo9bobo$269bo8b2o$267b3o9bo3$138b2o$137bobo$139bo$bobo61b2o99b2o
106b2o$2b2o60bo2bo97bo2bo105bo7b2o$2bo62bobo98bobo90bo4b3o4b2obo7bobo$
54b2o10bo88b2o10bo91b2o5bo3bo2bob2o5bo$54b2o99b2o101bobo4bo3bobo3bo$b
2o266bobobobo$2o268b2ob2o$2bo122b2o5b2o$124bobo6b2o$126bo5bo3$21b2o$
21bobo269b3o$21bo271bo5b2o$294bo4bobo$299bo3$300b2o$300bobo$300bo8$
316b2o$315b2o$317bo3$210b2o$210bobo101b2o$210bo103bobo$99bo214bo$99b2o
$98bobo144bo$245b2o69b3o$244bobo69bo5b3o$317bo4bo$323bo!

[yootaa]

Recently I found these reactions by QuFince:

Code: Select all

x = 215, y = 24, rule = B3/S23
170bo$171b2o$170b2o$3bobo$4b2o199bo$4bo162bo37bo$168bo36bo$2bo40bo122b
3o$obo38bobo157b3o$b2o39b2o$16bo39bo39bo39bo38bo29bo$5b2o9b3o27b2o8b3o
37b3o37b3o25bo10b3o26bobo5b2o$4bobo12bo25bobo6b2o3bo34b2o3bo34b2o3bo
24b2o7b2o3bo25bobo4bo2bo$6bo11bo27bo6bobo2bo34bobo2bo34bobo2bo24bobo6b
o2bobo27bo5bobo$18b2o34bo3b2o28bo5bo3b2o32bobo3b2o32bo2bob2o31b2ob2o$
89b2o42bo39b2o$88b2o$201b3o$92b2o37b2o70bo$91bobo36bobo69bo$5bo87bo38b
o$5b2o161bo$4bobo161b2o$167bobo!

[mniemiec]

Recently I found these reactions by QuFince: ...

Great! This converter solves two of the unsolved 19-bit quasi-still-lifes for 26 and 49 gliders respectively, leaving only six remaining unsolved:

Code: Select all

x = 255, y = 188, rule = B3/S23
121bobo$122boo$59bo62bo69bobo$43bobo11boo134boo$44boo12boo64bobo66bo$
44bo75b3obboo$122bobbo65bo$94bo26bo12bo39bo14bobo22bo18bo20bo$50boo40b
3o37b3o37b3o15boo20b3o16bobo18b3o$46boobbobo33bo4bo39bo33bo5bo33bo5bo
20boo11bo5bo$47boobo33bobo5bo34bo4bo32b3o4bo21boo9b3o4bo22boo8b3o4bo$
46bo38boo4boo33bobobboo35bobboo20bobo12bobboo21bobo6boo3bobboo$121bo5b
obo37bobo25bo11bobo25bo6bobobbobo$87bo33boo5bo39bo38boo34bo3boo$82boo
3boo31bobo$81bobobbobo72boo$83bo78boobbo$161bo3boo$165bobo$194bo$194b
oo$193bobo9$162bo$163bo$161b3o$199bo$199bo$199bo$157bobo$94bo39bo23boo
14bo20b3o16bo39bo$92b3o37b3o23bo13b3o37b3o37b3o$85bo5bo33bo5bo23boo8bo
5bo27bo11bo39bo$85b3o4bo32b3o4bo21bobo8b3o4bo25bobo5boo4bo33boo4bo$83b
oo3bobboo30boo3bobboo23bo6boo3bobboo25bobo4bobbobboo32bobbobboo$82bobo
bbobo32bobobbobo32bobbobobo29bo5bobobo35bobobo$83bo3boo32bobo3boo33bo
bboboo35booboo35booboo$77bobo42bo40boo32boo$78boo116bobo$78bo42boo75bo
$81b3o36bobo$83bo38bo$82bo76boo$158bobo$160bo15$9bo88bo94bo4bo$7bobo
88bobo31bobo59bo4boo$4boobboo88boo32boo51bobo4b3o3boo$5boo96bo29bo52b
oo$4bo42boo38boo14bobo21boo38boo17bo20boo38boo$8bobo37bo39bo14boo23bo
5boo32bo39bo39bo$8boo37bo39bo39bo5boo32bo3boo24bo9bo3boo34bo3boo$9bo
37boo38boo38boo6bo31boo3bo25bo8boo3bo34boo3bo$12bo117boo39bo24b3o12bo
39bo$11boo118bo38bo39bo39bo$11bobo75boo38bo39bo39bo37bobo$49b3o37boo
38boo38boo26b3o8bo38boo$49bo116bo6bobo15bobo5bo9b3o$50bo45boo66bobo6b
oo17boo4bo12bo32boo$46b3o47bobo5bo60boobboo3bo17bo51boo$48bo47bo6boo
63boo$47bo55bobo64bo4bo$94boo78boo$93bobo78bobo$95bo101boo$198boo$197b
o$$206b3o$205bobbo$208bo$204bo3bo$208bo$205bobo13$94bo4bo$50bo25bo16bo
4bo$51boo24bo15b3obb3o$50boo23b3o4bo$54bobo26boo$54boo26boo28bobo$55bo
57boo$113bo$$90b3o18bo$109bobo41bo$79bo30boo39bobo$77bobo45bo26boo11bo
39bo39bo$7boo38boo29boo7boo25boo9b3o27boo8b3o37b3o37b3o$8bo39bo39bo24b
obo12bo25bobo6boo3bo34boo3bo34boo3bo$7bo3boo34bo3boo27b3o4bo3boo22bo
11bo3boo22bo6bobobbo3boo29bobobbo3boo29bobobbo3boo$7boo3bo34boo3bo29bo
4boo3bo34boo3bo30bo3boo3bo30bo3boo3bo28bobo3boo3bo$11bo39bo29bo9bo39bo
39bo25bobo11bo30bo8bo$10bo39bo39bo39bo39bo27boo10bo39bo$7bobo37bobo37b
obo37bobo37bobo28bo8bobo37bobo$7boo38boo38boo38boo38boo32b3o3boo38boo$
203bo$4boo108bo87bo$4boo108boo$3o110bobo$bbo$bo7$162bo$163bo$161b3o$
199bo$199bo$199bo$157bobo$158boo35b3o$158bo$125bo29boo8bo33bo$125b3o
26bobo8b3o30bobo5boo38boo$123boo3bo27bo6boo3bo29bobo4bobbo36bobbo$122b
obobbo3boo29bobbobo3boo26bo5bobo3boo32bobo3boo$121bobo3boo3bo29bobbob
oo3bo31booboo3bo31booboo3bo$122bo8bo31boo6bo25boo12bo39bo$130bo39bo25b
obo11bo39bo$121boo4bobo37bobo28bo8bobo37bobo$120bobo4boo38boo38boo38b
oo$122bo$159boo$158bobo$160bo19$170bobboo9boo3boobo6boobboo11boo11bo
14boo$169bobobbo9bobobboboo7bo3bo11bobobo8b3o4bo7bo8bo$170bo3boboo8bo
12bo3bo15boo11bobbobo7b3o3b3o$173boobbo8boo11boo3b3o8bo5boo8bo4bobo8bo
bbo$171bobbobo11boboo8bo5bo7bobo4bo9boo5bo12bo$171boobbo12boobo8bobo
12bo3bobo15bo9bobboo$201boo15bobo13bobo9bobo$219bo14boo11bo!

[MathAndCode]

Synthesis for xs29_08ehbgn96z6607426

I improved it.

Code: Select all

x = 1516, y = 64, rule = B3/S23
518bo$518bobo$518b2o5$489bo$488bo11bo$488b3o8bo$499b3o10$229bo$227b2o
$obo225b2o$b2o657bo816bo$bo656bobo817b2o23bobo3bo$659b2o7b2o807b2o24b
2o4bobo$668b2o825bobo6bo4b2o$461bobo1031b2o$462b2o363bobo666bo$2b2o458b
o364b2o$b2o825bo$3bo$430bo395bo154bo$431b2o234bo156bobo155b2o$241b2o187b
2o29b3o202bobo156b2o154b2o237bobo$240bo2bo219bo203bo542bobo7b2o132bo$
22b2o217bobo218bo631bo116b2o8bo131bo$22bobo205b2o10bo578bo9bobo261bo115b
o15bo125b3o$22bo207b2o456b2o132bo8b2o144b3o113b3o131bobo$688bo131b3o9b
o146bo4bo242b2o129bobo$685b2obo289bo4bobo115bo114b2o140b2o129bo$684bo
2bob2o293b2o114bobo112bo2bo140bo123bob2obobo$683bobo3bo296b2o113bobo111b
o2bo6b2o115bob2ob2o134b2obob2o$683bobobobo296bo115b2o112b2ob2o4bobo114b
2obob2o137bo$684b2ob2o294b2obo117b2o113bo5bo4b3o112bo137b2obo$827b2o153b
o2bob2o115bo111b2obo10bo111b2obo8b2o126bo2bob2o$231b2o594bo7b2o144bob
o3bo113b2obo110bo2bob2o9bo109bo2bob2o6bobo124bobo3bo$230b2o585b3o4b2o
bo7bobo143bobobobo112bo2bob2o107bobo3bo119bobo3bo7bo126bobobobo$232bo
586bo3bo2bob2o5bo146b2ob2o112bobo3bo108bobobobo119bobobobo135b2ob2o$818b
o3bobo3bo270bobobobo109b2ob2o121b2ob2o$822bobobobo271b2ob2o401b3o$823b
2ob2o678bo$1507bo$454bo$453bobo$453bobo23b2o$454bo23bo2bo1023b2o$479b
obo1022b2o$468b2o10bo1025bo$468b2o$1478b2o28bo$1477bobo27b2o5bo$1479b
o27bobo3b2o$1513bobo!

[May13]

11G synthesis of xs26_cid1u0o4ozw178611 (I found the first natural occurrence of it from apgsearch):

Code: Select all

x = 90, y = 40, rule = B3/S23
34bo$34bobo$34b2o$15bo$13bobo$14b2o4$31bo$obo27bo$b2o27b3o$bo3$82b2o$
13bobo65bo2bo$14b2o65b3o$14bo64b2o$78bo3b4o$26bo52b3o4bo$25bo55bob2obo
$25b3o54b2obo2$87bobo$23bo59bo3b2o$21bobo59b2o3bo$22b2o58bobo6$5bo$5b
2o$4bobo2$b2o$obo$2bo!

[carsoncheng]

xs11_17842sg in 5G (down from 6G), found on 2023-05-27:

Code: Select all

x = 23, y = 19, rule = B3/S23
21bo$20bo$20b3o3$12bo$11bo$11b3o$bo$2bo$3o5b2o$7bobo$9bo4$12b2o$
12bobo$12bo!

1 xs11 left for 11-in-5 (amphisbaena)

Edit: It doesn't look like it's my discovery (I didn't find it in any of my searcher runs); would anyone take credit for it?

Another edit: After a second look, I found the search instance that discovered it (that instance was mine)

[squareroot12621]

35G synthesis for xs26_4aabap3z2ld11z011 that I ripped from a couple other still lives:

Code: Select all

x = 284, y = 52, rule = B3/S23
100bo$100bobo$100b2o7$78bo$79b2o$78b2o$93bo$84bo6b2o81bo$82bobo7b2o68b
o11bobo$83b2o78bo10b2o31bo$87bo73b3o43bobo$86bo112bo7b2o$86b3o36bo71b
obo$123bobo3bo38bo29b2o$124b2o3bobo36bobo$129b2o37b2o$172b2o26b2o$135b
o25b2o9bobo26b2o$12bobo118b3o21b2o2b2o9bo27bo5b2o$12b2o36bo35bo40b3o2b
o24bo48bo2bo23b2obo32b2obo$13bo36b3o33b3o40bo3b3o22b5o44b5o21bob4o30b
ob4o$53bo35bo38bo7bo26bo48bo26bo35bo$16bo31b5o31b5o42b5o22b5o44b5o22b
5o31b5o$14b2o32bo35bo46bo26bo41b2o5bo26bo35bo$5bo9b2o20bobo11b2o32b4o
43b4o23b4o36bobo6b4o23b4o32b4o$5b2o3bo27b2o4bo5bobo3bo31bo46bo26bo38b
o9bo26bo36bo$4bobo2b2o27bo6b2o4bo3bo31bo46bo26bo48bo26bo7bo27b2o$9bob
o32b2o9b3o29b2o45b2o25b2o47b2o25b2o4b2o28bo$205b3o36b2o29bo$198b2o5bo
68b2o$42b2o155b2o5bo$41bobo154bo38b3o$43bo195bo5b3o$238bo6bo$53bo192b
o$53b2o213b2o$52bobo214b2o11b2o$268bo4b2o6b2o$273bobo7bo$273bo2$bo$b2o
$obo272b2o$274b2o$276bo!

[Chris857]

From "Re: Thread For Your Accidental Discoveries"

Another thing: 2 Arks make a puffer that creates a cool still life in the middle of the ash.

Code: Select all

x = 101, y = 101, rule = B3/S23
2bobo$5bo$bo2bo$3o6$13bo$12bobo2$11bo2bo$11b2o$11bo72$88bobo$91bo$87b
o2bo$86b3o6$99bo$98bobo2$97bo2bo$97b2o$97bo!

The core reaction that produces the still life is just two R-pentominos and 4 blocks:

Code: Select all

x = 56, y = 56, rule = B3/S23
18bo$18b2o$17b2o$38b2o$38b2o3$2o$2o8$51b2o$51b2o19$54bo$53b3o$53bo16$
47b2o$47b2o!

Catagolue says that it takes 40 gliders to construct the still life, whereas this reaction requires 14 (3 for each R-pentomino and 2 for each of the blocks) leaving at most 25 gliders to clean up unwanted ash to produce a record-breaking glider synthesis. In fact, there just 16 individual objects to clean up, so even cleaning up each object individually with a single glider still produces a record-breaking synthesis. I am not going to to try to explicitly construct one, but anyone can give a try (it is slightly tedious but straightforward).

xs38_c8970v1u0ooz355ll21zx11 in 24G, down from 40G.

Code: Select all

x = 428, y = 102, rule = B3/S23
82bo$82bobo$82b2o5$2bo$obo$b2o46bo$48bo$33bo14b3o$34b2o$33b2o$50bo$48b
2o$49b2o268bo$100bo218bobo$99bo219b2o$99b3o2$325bo$325bobo$325b2o3$411b
o$411bobo$411b2o$307bo$207bo98bobo$206bobo97bobo$186b3o17bobo98bo$207b
o$339bo$313b3o22bo$213b3o122b3o$317bo$217bo99bo$217bo91bo7bo83bo$209b
o7bo91bo34bo56bo24bo$200b3o6bo99bo33bo57bo23bo$192b2o15bo133b3o79b3o$
191bo2bo116b2o90b2o$174bo17b2o9b2o6b2o98b2o9b3o78b2o$174b2o27b2o6b2o9b
3o$173bobo133b4o13bo74b4o$209b4o13bo81bo4bo12bo73bo4bo$4b2o202bo4bo12b
o81b5obo11bo73b5obo$3bobo202b5obo11bo86bobob2o86bobob2o$5bo207bobob2o
89b3o2bobob2o81b3o2bobob2o$85bobo2bo117b3o2bobob2o89bo2bobobo84bo2bob
obo$85b2o3bobo96bo18bo2bobobo95bobobo4b3o80bobobo4b3o$86bo3b2o97b2o20b
obobo4b3o87b2ob2o15b2o70b2ob2o$188bobo19b2ob2o15b2o97bo2bo$229bo2bo97b
2o$177bo52b2o$177b2o$176bobo38b2o$217b2o$221bo$221bo$221bo4$89bo$88b2o
$88bobo128bo$218bobo$218bobo$219bo$208b2o$209b2o$208bo21bo$230bo$230b
o8$204b2o$205b2o$204bo$216b2o$217b2o$216bo7$51b3o$53bo$52bo$92b3o$92b
o$93bo!

[squareroot12621]

Could this help reduce the synthesis of xs18_j9cz12315ac?

Code: Select all

x = 26, y = 13, rule = LifeHistory
21.A$8.3D10.A$10.D6.A2.3A$8.3D6.A2.3A$10.D4.5A3.A$8.3D.D4.2A3.A$13.D$
A.A3.9D5.2A$A12.D5.A.A$3A9.D6.A.3A$4.A15.A3.A$3.A.A17.A.A$4.2A18.2A!

[GUYTU6J]

I made a reduction to xs16_4aajkczx56 the other day, which affects around 110 other still lives. The count is more than those of the three jobs in this post but less than that of an earlier one here.

Review for two previous syntheses of mine.

The following edge-shooting 10G synthesis of xs16_4a9l6o8zx121 based on this soup is the longest-lived reaction I have ever used for syntheses, even when not considering the cleanup by glider_destruction.py:

Code: Select all

#C [[ ZOOM 12 X 55 Y -50 ]]
x = 150, y = 115, rule = B3/S23
123b2o5b2o$122bo2bo4bobo$123b2o6bo7$119bo9b3o$118bobo8bo$118bo2bo8bo$
119b2o$129bo18b2o$129b2o16b2o$128bobo18bo97$b2o$obo$2bo!

Previous record for those who prefer tighter history over cheaper cost:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_4a9l6o8zx121 costs 12 gliders (true).
#CLL state-numbering golly
x = 109, y = 18, rule = B3/S23
14bo$12b2o$13b2o88bo$97bobo3bobo$bo96b2o3b2o$2bo95bo$3o53bobo3b2o$
18bo38b2o2b2o43b2o$12bo3b2o39bo5bo37bo4bobo$12b2o3b2o35bo44b3o4bo$
11bobo36b2obobo39b2obo$49bobob2o39bobob2o$49bo2bo8b3o30bo2bo$3b2o
45bobo8bo33bobo$4b2o45bo10bo33bo$3bo7b2o$11bobo$11bo!

Two other soups implies faster 11G recipes:

Code: Select all

x = 105, y = 97, rule = B3/S23
89b2o$89b2o2$96bobo$96b2o$97bo2$95bo$95bo$95bo6$29bo$27bobo$28b2o$47bo
$32b3o10b2o$32bo13b2o53b2o$33bo6bo59bo2bo$23b3o14bobo57b2o2bo$25bo14b
2o56b2o2b2o$24bo74bobo$43b3o53bobo$43bo56bo$21b2o21bo$22b2o$21bo2$18b
2o$19b2o4bo$18bo5b2o$24bobo22$2o$b2o$o17$59bobo$54bo5b2o$55bo4bo5bo$
53b3o10bobo$48bo17b2o$49b2o$48b2o19b2o$68bobo$70bo4bo$74b2o$52b2o5b3o
12bobo$51bobo$53bo7$73b2o$72b2o$74bo!

(minor EDIT on June 26: it turns out to affect around 60 still lives.)

While checking soups for xs16_3123qajo, I saw this one producing a pseudo still life xs20_3pabobjo that apgsearch dissects into a block and an xs16_3123qajo when recognizing objects. The core reaction implies two syntheses: not only for xs20_3pabobjo itself, but also for cis-rotated_?-table_siamese_snake (xs20_3pabqajo).

Code: Select all

x = 135, y = 26, rule = B3/S23
34bo99bo$obo29b2o98b2o$b2o30b2o98b2o$bo$23bo99bo$21b2o98b2o$11bo10b2o
87bo10b2o$12b2o98b2o$11b2o82bo15b2o$93bobo$94b2o$16bobo97bobo$16b2o98b
2o$11bobo3bo93bobo3bo$12b2o98b2o$12bo99bo$102bo$103bo4bo$101b3o5bo$
107b3o4$103b3o$105bo$104bo!

For reference, this is the previous route for xs20_3pabqajo synthesis via xs16_3123qajo and xs20_3pabobjo.

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs20_3pabqajo costs 17 gliders (true).
#CLL state-numbering golly
x = 213, y = 33, rule = B3/S23
113bo$111b2o$112b2o4$8bo19bo81bo$6bobo18bo82bobo7bo$7b2o18b3o75bo
4b2o6b2o$106b2o11b2o$105b2o3$2bo$3bo2bobo9bobo$b3o2b2o10b2o137bo
37bo$7bo11bo41bo11b2o36b2o42bobo3b2o30bobo15b2o$62bo11bo37bo43b2o
4bo31b2o3bobo6b2o2bo$60b3o9bo37bo41b2o7bo38b2o6b2obo$72b2o36b2o39b
obo7b2o37bo10b2o$64b2o3b2obo34b2obo42bo4b2obo34b2o10b2obo$b2o61b2o
4bobo35bobo48bobo33bobo11bobo$obo66bo2b2o33bo2b2o46bo2b2o34bo10bo
2b2o$2bo66b2o36b2o49b2o48b2o7$7b2o$8b2o$7bo!

This soup suggests 11G for xs16_3123qajo:

Code: Select all

x = 36, y = 42, rule = B3/S23
27bo$26bo$26b3o2$10bo$o10bo21bo$b2o6b3o20bo$2o30b3o$5b2o$4b2o24bo$6bo
21b2o$29b2o$4bo$4b2o$3bobo6$33b2o$9b2o22bobo$8bobo22bo$10bo16$28b3o$
28bo$29bo!

I spent a while picking a 3G LoM inserter for the east side. If only there was a script with conflict detection to automate the placement process...

[Chris857]

Relatively edgy Chucklebait synth in 24G that I found from a soup result that will help with an oscillator synth I'm working on.

Code: Select all

x = 295, y = 113, rule = B3/S23
136bobo$136b2o$137bo7$234bo$235b2o$234b2o2$131bo$131bobo$41bo89b2o$42b
o$40b3o7$125bo$125bobo97bo$125b2o99b2o65bo$225b2o65bo$57bobo232b3o$58b
2o6bo$58bo8b2o44bobo140bo$66b2o45b2o140bobo$110bo3bo139bo2bo$108b2o145b
2o$109b2o2$278bo$277bo$277b3o$291bobo$291b2o$292bo4$244bo$88bo155bo$87b
2o155bo$87bobo136bo$227bo12b3o$225b3o$244bo25bo$244bo25bo$244bo25bo3$
92b3o$92bo$93bo2$256b2o$256b2o$269bo$268b2o$268b2o$255b2o11bo$84b2o167b
o2bo$83bo2bo165bob2o$83bobo167bo2b3o$84bo169b2o3bo$257b2o$254b2obo$254b
o2bo$255b2o$134b2o115b2o$134bobo114b2o$134bo3$37b2o$36bobo$38bo3b3o$44b
o$43bo2$128b2o6b2o$128bobo4b2o$128bo8bo23$bo$b2o$obo!

[GUYTU6J]

Relatively edgy Chucklebait synth in 24G that I found from a soup result that will help with an oscillator synth I'm working on.

The core reaction at T = 266 implies 11G xs23_4aklb88gzw6a871, merely two more than the cheapest variant mentioned on LifeWiki

Code: Select all

#C [[ X 4 Y 4 ]]
x = 39, y = 30, rule = B3/S23
obo20bobo$b2o20b2o$bo22bo9$19bo$20bo$18b3o$14b3o$16bo$15bo2$33bo$31bob
o$18b2o12b2o$18b2o$22b3o11b3o$36bo$37bo2$26b2o$25bo2bo$25bobo$26bo!

In the relevant job log I see four high-period oscillators. I assume that this new synthesis can be used elsewhere, but the p52, p80 and p102 honey farm hasslers have pairs of mutually hindering xs23_4aklb88gzw6a871.
---
xs16_4alhe8zw65 in 11G based on this soup

Code: Select all

x = 63, y = 53, rule = B3/S23
2bo$obo$b2o24$43bo16bobo$44b2o14b2o$43b2o8bo7bo$51b2o$52b2o2$47b2o$48b
2o$47bo$58b2o$31bo25b2o$32b2o25bo$31b2o$27b2o$26bobo$28bo9$45b2o$45bob
o$45bo!

Although previous record is also soup-based involving no synthesis component, its good edge-shooting clearance on one side is worth noting.

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_4alhe8zw65 costs 12 gliders (true).
#CLL state-numbering golly
x = 80, y = 69, rule = B3/S23
79bo$77b2o$78b2o12$53bo$51bobo$52b2o$70bo$70bobo$70b2o3$71bo$36bo
34bobo$37b2o9bobo20b2o$36b2o11b2o$49bo17$2bo$obo51b2o$b2o52b2o7bo$
54bo8bobo$4b2o57bobo$3bobo58bo$5bo$61b2o$60bobo$62bo9$44b3o$46bo$
45bo3$41bo$41b2o$40bobo!

When scanning soups for xs16_25a842642ac, I came across this one that actually makes the pseudo xs24_ci52zg6r0rrz11.

Code: Select all

#C [[ Y -5 ]]
x = 52, y = 44, rule = B3/S23
13b2o22b3o$12bobo$14bo20bo5bo$35bo5bo$35bo5bo$17b3o$17bo19b3o$18bo2$
36bo$19b3o14bo$19bo16bo$20bo3$2o$b2o$o10$45b3o$12bo32bo$12b2o32bo$11bo
bo4$42b3o$42bo$43bo5$49b3o$49bo$50bo!

[squareroot12621]

When scanning soups for xs16_25a842642ac, I came across this one that actually makes the pseudo xs24_ci52zg6r0rrz11.

Code: Select all

#C [[ Y -5 ]]
x = 52, y = 44, rule = B3/S23
13b2o22b3o$12bobo$14bo20bo5bo$35bo5bo$35bo5bo$17b3o$17bo19b3o$18bo2$
36bo$19b3o14bo$19bo16bo$20bo3$2o$b2o$o10$45b3o$12bo32bo$12b2o32bo$11bo
bo4$42b3o$42bo$43bo5$49b3o$49bo$50bo!

1G unpseudoifying/cleanup:

Code: Select all

x = 86, y = 102, rule = B3/S23
o$b2o$2o56$47b2o22b3o$46bobo$48bo20bo5bo$69bo5bo$69bo5bo$51b3o$51bo19b
3o$52bo2$70bo$53b3o14bo$53bo16bo$54bo3$34b2o$35b2o$34bo10$79b3o$46bo32b
o$46b2o32bo$45bobo4$76b3o$76bo$77bo5$83b3o$83bo$84bo!

[Chris857]

xs26_3lkm0uiz12430346 in 12G, down from 13G.

Code: Select all

x = 248, y = 87, rule = B3/S23
219bo$220bo$218b3o2$42bo170bo$42bobo169bo$42b2o168b3o9$121b3o117b3o4$
105bo$106bo$104b3o3$120bo119bo$119bobo117bobo$119bo2bo116bo2bo$120b2o
118b2o$39b2o$38b2o$b2o37bo$obo$2bo3$221b2o$220bobo20b3o$222bo$241bo5b
o$241bo5bo$241bo5bo2$243b3o2$210bo$210b2o$209bobo13$102bo$102b2o$101b
obo2$181b2o$180bobo$182bo16$170b2o$169bobo$171bo$202b2o$201bobo$203bo
!

[Extrementhusiast]

xs26_3lkm0uiz12430346 in 12G, down from 13G.

Code: Select all

RLE

Eight gliders:

Code: Select all

x = 17, y = 30, rule = B3/S23
6bo$4b2o$5b2o2$4bo$5bo$3b3o9$8bo$3o4bobo$2bo4bobo$bo6bo3$14b2o$14bobo$
6b2o6bo$7b2o$6bo2$12bo$11b2o$11bobo!

[Chris857]

trans-mirrored worm with tub in 10G, down from 16G.

Code: Select all

x = 129, y = 159, rule = B3/S23
2bo$obo$b2o51$21bo$19bobo$20b2o2$54bo$55b2o$54b2o2$52bo$53bo$51b3o14$
72bo$71b2o$55bobo13bobo$56b2o$56bo14$75b3o$75bo$76bo2$73b2o$72b2o$74b
o2$107b2o$107bobo$107bo51$126b2o$126bobo$126bo!

2023-07-04:

Doable:

Code: Select all

x = 57, y = 57, rule = B3/S23
14bo27bo$15bo25bo$13b3o25b3o4$18bo19bo$19bo17bo$17b3o17b3o4$20bo$2bo
15bobo33bo$obo16b2o6b3o24bobo$b2o51b2o2$8bo39bo$6bobo34bo4bobo$7b2o33b
o5b2o$20b2o13b2o5b3o$20b2o13b2o3$27b2o$27b2o2$14bo16b2o9bo$14bo9b2o5b
2o9bo$14bo9b2o16bo2$28b2o$28b2o3$20b2o13b2o$12b3o5b2o13b2o$7b2o5bo33b
2o$6bobo4bo34bobo$8bo39bo2$b2o51b2o$obo24b3o6b2o16bobo$2bo33bobo15bo$
36bo4$17b3o17b3o$19bo17bo$18bo19bo4$13b3o25b3o$15bo25bo$14bo27bo!

A way to put a tub inside of it:

Code: Select all

x = 57, y = 57, rule = B3/S23
14bo27bo$15bo25bo$13b3o25b3o4$18bo19bo$19bo17bo$17b3o17b3o4$20bo$2bo
15bobo33bo$obo16b2o6b3o24bobo$b2o51b2o2$8bo39bo$6bobo34bo4bobo$7b2o33b
o5b2o$20b2o13b2o5b3o$20b2o13b2o3$27b2o$27bobo$28bo$14bo10bo5b2o9bo$14bo9bobo3b
obo9bo$14bo9b2o5bo10bo$28bo$27bobo$28b2o3$20b2o13b2o$12b3o5b2o13b2o$7b2o5bo33b
2o$6bobo4bo34bobo$8bo39bo2$b2o51b2o$obo24b3o6b2o16bobo$2bo33bobo15bo$
36bo4$17b3o17b3o$19bo17bo$18bo19bo4$13b3o25b3o$15bo25bo$14bo27bo!

This may be the first-ever synthesis of a still life contiguously surrounded by another.

The tub-inside version of the still life in 52G.

Code: Select all

x = 418, y = 75, rule = B3/S23
358bo43bo$108bo247bobo43bobo$106bobo248b2o43b2o$107b2o6$109bo$110b2o$
109b2o33bo71bo$143bo73bo46bo$143b3o2bobo64b3o46bobo77bo71bo$148b2o102b
o11b2o79bo69bo$149bo102bobo88b3o26bo15bo26b3o$229bo22b2o116bobo15bobo
$12bo214bobo141b2o15b2o$13b2o213b2o$12b2o2$376bo7bo$12bo361bobo7bobo$
10bobo205bo156b2o2b3o2b2o$11b2o206bo40bo$217b3o39bo$259b3o115bo$359bo
18bo22bo$360bo15b3o21bo$358b3o11b2o13b2o11b3o$372b2o13b2o$365bo29bo$366b
o27bo$239b2o123b3o12b2o8bo4b3o$239bobo137bobo7bobo$240bo139bo8b2o$39b
2o86bo5b2o102bo5b2o121bo10bo5b2o9bo$38bobo85bobo3bobo101bobo3bobo121b
o9bobo3bobo9bo$39bo86b2o5bo102b2o5bo122bo9b2o5bo10bo$36bo93bo109bo129b
2o8bo$35bobo91bobo107bobo127bobo7bobo$36b2o92b2o108b2o122b3o4bo8b2o12b
3o$366bo27bo$365bo29bo$372b2o13b2o$358b3o11b2o13b2o11b3o$360bo21b3o15b
o$359bo22bo18bo$219b3o161bo$221bo39b3o$220bo40bo$262bo112b2o2b3o2b2o$
374bobo7bobo$376bo7bo3$9bo241b2o$9b2o240bobo117b2o15b2o$8bobo216b2o22b
o118bobo15bobo$3o223bobo114b3o26bo15bo26b3o$2bo212b2o11bo116bo69bo$bo
212bobo46b3o78bo71bo$216bo46bo$264bo9$357b2o43b2o$356bobo43bobo$358bo
43bo!

[May13]

xs15_0ci52zojd in 9G and xs16_0ggka23zpic in 11G:

Code: Select all

x = 267, y = 87, rule = B3/S23
254bo$253bo$253b3o27$7bo$8bo$6b3o2$obo20bo$b2o19bo187bo$bo20b3o183bobo
$202bobo4b2o$203b2o$203bo2$229bo$228bo$85bo142b3o$84bobo$71b2o5b2ob2o
2bo118b2o9b3o$22b2o47b2o4bo2b2ob2o118bobo9bo9b2o$21b2o54b2o126bo10bo7b
2o$16b2o5bo158b2o42bo$17b2o45b3o114bobo$16bo49bo116bo$65bo2$89bo$88bob
o$89bo4$90b3o$22b2o66bo$22bobo66bo$22bo185b2o$8b2o199b2o$7bobo198bo$9b
o11$181b3o$183bo$182bo7$265b2o$264b2o$266bo!

[GUYTU6J]

xs15_4a9jzx1qm in 7G based on this soup...

Code: Select all

x = 55, y = 71, rule = B3/S23
5bo$6bo$4b3o28$14bo$15b2o$14b2o24bo$38bobo$39b2o2$39bo$38bobo$39b2o11b
o$52bobo$52b2o28$b2o$obo$2bo!

...which admittedly is just slightly less messy than the existing 10G route (which I could not find in this thread).

Code: Select all

x = 85, y = 88, rule = B3/S23
84bo$82b2o$83b2o17$2bo$obo$b2o40$41bo$39b2o$40b2o2$31bo$31b2o$30bobo2b
obo$35b2o$36bo12$24b3o5b3o2$36bo$36bo$36bo2$32b3o!

Per job log, this implies xs16_4a9jzxpia4 in 10G and xs16_4a9jzxha6zx11 in 11G in addition to 450+ other still lives.

Pseudo still life xs20_2530j9a4zw6ip (one of the isomers of boat on xs15_4a9jzxpi6) in 9G based on a C2_2 soup

Code: Select all

x = 24, y = 19, rule = B3/S23
5bo$3bobo$4b2o$14bo$14bobo4bo$14b2o5bo$21bo$4bo$5bo$3b3o3$8b2o$9b2o11b
2o$8bo12b2o$17bo5bo$3o14b2o$2bo13bobo$bo!

This should be known but to take a note: a synthesis for the constellation xs12_66w3pm can be used as a 5-glider shillelagh edge-shooter similar to the 4-glider one for a snake.

Code: Select all

x = 22, y = 21, rule = B3/S23
o17bo$b2o13b2o$2o15b2o3$16bo$16bobo$2bobo11b2o$3b2o$3bo2$5bo$5b2o$4bob
o2$b2o$obo$2bo12b2o$14b2o3b3o$16bo2bo$20bo!

xs22_xmm0ehrz6a43, previously 9G converted from xs18_wmm0e96z643 in two steps, is now 6G thanks to the 4G xs13_25b8o0oo:

Code: Select all

x = 17, y = 22, rule = B3/S23
7bobo$8b2o$8bo2$10bobo$10b2o$11bo3$14bo$14bobo$14b2o$2bo3bobo$obo3b2o$
b2o4bo5$10b2o$9b2o$11bo!

Challenge: can you find a long^(-1) canoe (long ship predecessor) edge-shooter to reduce the following add-9-cell component?

This long ship ancestor occurs rarely, for instance:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs12_33ya6ako costs 4 gliders (pseudo).
#CLL state-numbering golly
x = 17, y = 12, rule = B3/S23
b2o$obo$2bo2$12b2o$12bobo$12bo2$5b2o$4bobo8bo$6bo7b2o$14bobo!

Here is an 8-glider method based on this soup:

Code: Select all

x = 25, y = 23, rule = B3/S23
obo$b2o$bo$4bo$5b2o11bo$4b2o12bobo$18b2o2$23bo$14bobo5bobo$14b2o5bo2bo
$15bo4bob2o$19bobo$3bobo12bo2bo$4b2o13b2o$4bo5$15bo$15bo$15bo!

Hours later a 7-glider approach is extracted from another soup:

Code: Select all

x = 26, y = 24, rule = B3/S23
21bo$o18b2o$b2o17b2o$2o22bo$23bobo$22bo2bo$21bob2o$20bobo$19bo2bo$20b
2o5$13bo$4b3o7b2o$6bo6b2o$5bo$17b2o$18b2o$17bo$21b2o$21bobo$21bo!

But I am expecting a 5~6G solution coming from [north/south]west. Any QuFince experts?

[Chris857]

Edgy into-the-corner synthesis of the ?-hat_siamese_shillelagh_and_block (xs19_3pm0mmzw343) variant of Eater 2 in 12G.

Code: Select all

x = 117, y = 152, rule = LifeHistory
34$25.A.A$26.2A62.A$26.A63.A.A$90.2A2$27.A$28.2A$27.2A3$22.A55.A$20.A
.A55.A.A$21.2A55.2A3$37.A$35.A.A$27.A8.2A$25.A.A$26.2A20$66.D$65.D.D$
65.D.D$64.2D.2D$64.D$65.D.2D$63.D.D.2D$63.2D20$31.A$31.2A$30.A.A4.2A$
36.A.A$23.A14.A$23.2A4.2A$22.A.A3.A.A$30.A5$21.2A$20.A.A$22.A!

It has better clearance for the p69 synth I just completed than the second-best that I am aware of (for the standard eater 2) which didn't fit by like a single wayward cell on the edge of its envelope.

Code: Select all

x = 111, y = 81, rule = LifeHistory
5.3B$5.4B61.2B$6.4B59.4B$7.4B57.4B$8.4B55.4B$7.6B53.4B$7.7B51.4B$7.8B
49.4B$8.8B47.4B$9.8B45.4B$.2B7.8B40.2B.4B$4B7.8B38.7B$.4B7.8B36.7B$2.
4B7.8B34.7B$3.4B7.8B32.7B$4.4B7.8B30.7B$5.4B6.9B28.7B$6.4B6.9B26.7B$5.
6B6.9B24.7B$6.6B6.9B22.7B$7.6B6.9B20.7B$8.6B6.9B18.7B$9.6B6.9B16.7B$10.
6B6.9B14.7B$11.6B6.9B12.7B$12.6B6.9B10.7B$13.6B6.9B8.7B$14.6B6.9B6.7B
$15.6B6.9B4.7B$16.6B6.9B2.7B$17.6B6.16B$18.6B6.14B$19.6B6.12B$20.6B6.
10B40.B19.2B$21.6B6.9B38.5B14.3B2CB$22.6B5.10B37.5B13.2D2BC.CB$23.6B3.
12B36.B2C3B12.2D3BC2B$24.6B.15B34.B2C3B12.7B2.B$25.23B32.6B5.2B2D4.2B
C3B.3B$26.20BCB32.5B5.3B2DB2.3BC4BD4B$27.18BCBC31.6B5.6B2.3BC3BDBD3B$
27.18BCBC2B28.11B.6B2.7BDBD3B$27.17B2CB2CB27.6BC13B3C3B3CB2D2B$27.17B
C5B28.5B2C17BD8B$28.9B2.6BCB2C26.9B2C15BCB3DB2D2B$28.10B2.3BCBCB2C25.
8BCBC16BC3BDB2DB$27.11B.4B2C2B27.3BD4B2C15B2.C3B2.3B$26.11B.4B32.2BDB
D3BC15B4.2B4.B$25.16B33.2BDBD17B$24.11B.4B33.4BD17B$23.11B.4B34.16B.4B
$22.11B.4B36.11B2.B$21.11B.4B37.11B$20.11B.4B40.7B$19.11B.4B42.6B$18.
11B.4B44.4B$17.11B.4B45.4B$16.11B.4B47.2B$15.11B.4B$14.11B.4B$13.11B.
4B$12.11B.4B$11.11B.4B$10.11B.4B$9.11B.4B$8.11B.4B$7.11B.4B$6.11B.4B$
5.4B.6B.4B$4.4B2.5B.4B$3.4B2.5B3.2B$2.4B2.5B$2.3B2.5B$6.5B$5.4B$4.4B$
3.4B$2.4B$.4B$4B$.2B!

Found from this soup.

Code: Select all

x = 31, y = 31, rule = B3/S23
16b3o2bo2bo2b4o$17bo5b2o4bo$16bo3b5ob2o2bo$15b4o2b3ob2o$21b3o3bobo$15b
o4b4o2bo2bo$16bobo2bobob2o2bo$16b2o2bo2b2o3b3o$17bob2obo3bob3o$15b2o2b
2ob2ob2obo$16bobo2b3ob2o3bo$15b2o3bob2o5b2o$17b3o3bobobob2o$15b5ob3ob
2o3bo$15b2ob3o2bobobobo$bobo4b3o2bobobo2b3o4bobo$bobobobo2b3ob2o$o3b2o
b3ob5o$2obobobo3b3o$2o5b2obo3b2o$o3b2ob3o2bobo$2bob2ob2ob2o2b2o$3obo3b
ob2obo$3o3b2o2bo2b2o$bo2b2obobo2bobo$bo2bo2b4o4bo$bobo3b3o$4b2ob3o2b4o
$o2b2ob5o3bo$bo4b2o5bo$4o2bo2bo2b3o!

Octohash found two ways to make the one spark. The beehive one seemed easier/faster than the pure blockic one for the synth I was doing. P.S. Tried the pure blockic way to get the spark, but it seems there might not be the clearance to get the LOM inserted in time without crashing into one of the blocks.

Code: Select all

x = 135, y = 109, rule = LifeHistory
22$75.A39.A$75.A.A37.A.A$75.2A38.2A$72.2A38.2A$72.2A38.2A$35.A39.D2A
37.D2A$34.A.A35.2AD.2A34.2AD.2A$31.2A.A36.D2AD36.D2AD$29.2A.A36.2D.D
36.2D.D$31.A39.D39.D$72.2A.2A35.2A.2A$72.2A.2A35.2A.2A$30.A39.D$29.3A
37.3D$29.A2.A36.D2.D$30.3A37.3D$31.A39.D2$36.2D38.2D$33.2D2.D35.2D2.D
$31.3D.D2A33.3D.D2A$30.D4.A.A32.D4.A.A$31.3D.DA34.3D.DA$33.D.2D36.D.
2D30$69.2A38.2A$69.2A4.2A32.2A4.2A$74.AD.A2.A33.AD.A2.A$69.2A3.D2A2.A
29.2A3.D2A2.A$69.2A2D.D4.3A27.2A2D.D4.3A$69.2D.D36.2D.D$71.D39.D$76.
2A38.2A$75.A2.A36.A2.A$70.D5.2A38.2A$69.3D$69.D2.D$70.3D$71.D2$76.2D$
73.2D2.D$71.3D.D2A$70.D4.A.A$71.3D.DA$73.D.2D!

Edit: and an alternative initial boat synth that I think is slightly slower to insert, but gives more balanced clearance.

Code: Select all

x = 229, y = 121, rule = LifeHistory
15$29.A.A107.3B$30.2A62.A44.4B61.2B$30.A63.A.A43.4B59.4B$94.2A45.4B
57.4B$142.4B55.4B$31.A109.6B53.4B$32.2A107.7B51.4B$31.2A108.8B49.4B$
142.8B47.4B$143.8B45.4B$26.A55.A52.2B7.8B40.2B.4B$24.A.A55.A.A49.4B7.
8B38.7B$25.2A55.2A51.4B7.8B36.7B$92.B43.4B7.8B34.7B6.B$40.B50.A.A43.
4B7.8B32.7B6.3B$39.A.A49.2AB44.4B7.8B30.7B6.4B$39.B2A50.A46.4B6.9B28.
7B6.4B$31.A8.A99.4B6.9B26.7B6.4B$29.A.A11.BA94.6B6.9B24.7B6.4B$30.2A
12.BA94.6B6.9B22.7B6.4B$43.3A95.6B6.9B20.7B6.4B$142.6B6.9B18.7B6.4B$
143.6B6.9B16.7B6.4B$144.6B6.9B14.7B6.4B$145.6B6.9B12.7B6.4B$146.6B6.
9B10.7B6.4B$147.6B6.9B8.7B6.4B$148.6B6.9B6.7B6.4B$149.6B6.9B4.7B6.4B$
150.6B6.9B2.7B6.4B$151.6B6.16B6.4B$152.6B6.14B6.4B$153.6B6.12B6.4B$
154.6B6.10B6.4B$155.6B6.9B5.4B$156.6B5.10B3.4B$157.6B3.12B.4B$158.6B.
17B$159.23B$70.D89.20BCB$69.D.D89.18BCBC$69.D.D89.18BCBC2B$68.2D.2D
88.8B2.7B2CB2CB$68.D92.8B3.6BC5B$69.D.2D89.9B2.2B.3BCB2C$67.D.D.2D89.
10B4.BCBCB2C$67.2D92.11B5.2C2B$160.11B$159.4B.7B$158.4B2.5B$157.4B2.
5B$156.4B2.5B$155.4B2.5B$154.4B2.5B$153.4B2.5B$152.4B2.5B$151.4B2.5B$
150.4B2.5B$149.4B2.5B$148.4B2.5B$147.4B2.5B$146.4B2.5B$145.4B2.5B$
144.4B2.5B$143.4B2.5B$142.4B2.5B$141.4B2.5B$140.4B2.5B$139.4B2.5B$
138.4B2.5B$27.A109.4B2.5B$27.2A4.2A101.4B2.5B$26.A.A3.A.A101.3B2.5B$
34.A105.5B$139.4B$138.4B$137.4B$136.4B$25.2A108.4B$24.A.A107.4B$26.A
108.2B!

[GUYTU6J]

xs16_8o6512koz32 in 10G:

Code: Select all

x = 43, y = 32, rule = B3/S23
3bobo$4b2o$4bo6$22b2o$21bobo$23bo2$27bo$26b2o$12b2o12bobo$13b2o$12bo$
28b2o$28bobo$8bo19bo$bo6b2o$b2o4bobo$obo7$41bo$40b2o$40bobo!

At T=62 the following 8-cell beehive predecessor occurs, with a lifespan of 74 ticks that is only two less than that of the procrastinator:

Code: Select all

x = 4, y = 5, rule = B3/S23
b3o$3bo$3bo$2bo$2o!

...
Edit 2: 10G xs15_0g8it246z23 (better cleanup):

Code: Select all

x = 95, y = 67, rule = B3/S23
91bobo$91b2o$92bo17$2bo$obo$b2o59bo$40bobo18bobo$4b2o35b2o18bobo$3bobo
35bo20bo$5bo3$63bobo$51bo11b2o$52bo11bo$50b3o10$56b3o$37bo18bo$37b2o
13b2o3bo$36bobo12bobo$53bo19$92b3o$92bo$93bo!

...

Now reduced to 9G; the extra circled southeastbound glider below is caught as a boat-bit in xs21_32qkg8o0ok8zy065, implying 11G xs16_0g8jt246z23.

Code: Select all

x = 64, y = 71, rule = B3/S23
3bobo$bo5bo2$o2bobo2bo$4b2o$o3bo3bo2$bo5bo$3bobo4$60bobo$60b2o$61bo14$
36bo$36bobo$36b2o2$39b2o$30bo8bobo$28b2o9bo$29b2o2$22bo$23bo8bo$21b3o
6bobo$17bo13b2o$17b2o$16bobo$29b2o$30b2o$29bo23$61b3o$61bo$62bo!

Previous record for the xs16 uses a rather complex component:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_0g8jt246z23 costs 12 gliders (true).
#CLL state-numbering golly
x = 119, y = 18, rule = B3/S23
71bo$2bo68bobo$obo61bobo4b2o$b2o62b2o$65bo$6bo52bo$6bobo51bo6bo$6b
2o50b3o6bobo$67b2o40b2o$9bo44b2o53b2o$9bobo41bobo62bo$9b2o44bo16b
2o31b3o8b3o$62b2o8bobo32bo7bo$20b3o38bo2bo7bo33bo5b2o2bo$5b3o12bo
39bob3o47bob3o$7bo13bo39bo51bo$6bo55bo51bo$61b2o50b2o!

Henceforth, a total of 11 + 49 = 60 still lives are pending reduction for the 16-in-11 target. One year ago the count was 250.

---

Filler content: the 5G carrier tie ship (xs12_08o653z32) recipe includes a 4-glider bookend-tie-ship length-3 induction coil ancestor, but its very delayed surface formation (even more so than the R-mango/dove precursor in xs22_xrb079icz3521) can only inspire reduction of xs26_y3g8o653zxoie032z653 to 8G. This is two directional in a rare antiparallel style.

Code: Select all

x = 19, y = 17, rule = B3/S23
11bo$9b2o$10b2o$15bo$13b2o$14b2o$o4bo$obo2bobo$2o3b2o5b2o3b2o$11bobo2b
obo$13bo4bo$3b2o$4b2o$3bo$7b2o$8b2o$7bo!

Its cost ties with that of its predecessor:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs21_y2c8a52zg8o6513z11 costs 8 gliders (true).
#CLL state-numbering golly
x = 74, y = 21, rule = B3/S23
73bo$71b2o$72b2o2$25bobo42bo$25b2o41b2o$26bo36bobo3b2o$64b2o$64bo$
6bobo9bo$6b2o9bo$7bo9b3o45bo$64bobo$2bo60bobo$obo60bo$b2o57b2ob2o$
61bo$59bobo$3b3o52bobo$3bo55bo$4bo!

A 2-stage 7-glider synthesis component converting half-blockade (xs8_33w66) to xs25_660u1le0ehrzy01 based on this soup

Code: Select all

x = 27, y = 25, rule = B3/S23
16b2o$16b2o3$3b2o12b2o$4b2o11b2o$3bo7b3o$11bo$2o10bo$b2o5b2o$o7bobo$8b
o7$25bo$24b2o$24bobo2$8bo$8b2o$7bobo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs25_660u1le0ehrzy01 costs 16 gliders (true).
#CLL state-numbering golly
x = 123, y = 27, rule = B3/S23
14bo$13bo54bo$13b3o50b2o$67b2o2$obo61bo$b2o62bo6b2o43b2o$bo61b3o6b
2o43b2o2$59bobo10b4o41b4o$60b2o9bo4bo39bo4bo$60bo10bobobo40bobobo$
70b2ob2o42b3o2$64b2o51b3o$12b2o49bobo50bo2bo$12bobo50bo50b2o$12bo$
70b3o$26b2o44bo3b2o38bo$10b3o13bobo42bo3b2o39b2o3bo$12bo13bo50bo
37bobo2b2o$11bo108bobo$72b3o7b2o$74bo7bobo32bo$73bo8bo33b2o$116bob
o!

[Chris857]

xs18_bdzdbzbd in 13G, down from 14G. And xs24_bdzdbzbdzdb in 18G.

Code: Select all

x = 192, y = 50, rule = B3/S23
2b2o48b2o58b2o58b2o$3bo49bo59bo59bo$2bo49bo59bo59bo$2b2o48b2o58b2o58b
2o2$2b2o48b2o58b2o58b2o$2bo49bo59bo59bo$3bo49bo59bo59bo$2b2o48b2o58b2o
58b2o2$52b2o58b2o58b2o$2o49bobo59bo59bo$b2o49bo59bo59bo$o111b2o58b2o2$
172b2o$114b2o56bobo$113b2o58bo$115bo15$34b2o$35b2o$34bo2$73b3o$65b3o5b
o116b2o$65bo8bo114b2o$66bo124bo2$34b3o113b3o$36bo115bo5b3o$35bo115bo8b
o$159bo2$189b3o$189bo$190bo!

[GUYTU6J]

1-stage 6-glider synthesis component adding 14 cells to an exposed pre-block, shown below converting fishhook to xs21_wo86168e1e8z321 or xs21_17871686178c. ...

The domino can be replaced by other fast components. ...

I made a small collection for these domino + domino → domino reactions, categorized by environment the domino is in.

Code: Select all

x = 67, y = 112, rule = LifeHistory
45.C$46.C$19.C.C22.3C$19.2C$2.C17.C$3.C$.3C$60.C$58.2C$59.2C4$50.2D$A
.A37.A.A7.D2.D$.2A5.2D31.2A5.2D2.2D10.2C$.A39.A22.C.C$64.C$58.C$57.2C
$57.C.C2$3A37.3A$2.A39.A$.A39.A5$2.3A37.3A$4.A39.A$3.A39.A8$14.C$13.C
$13.3C$51.C.C$52.2C$52.C2$16.C$15.C$15.3C2$50.D4.C$49.D.D.2C$8.2D38.D
.D3.2C$8.D39.D$A.A6.D6.C23.A.A6.D7.2C$.2A5.2D5.2C24.2A5.2D7.C.C$.A13.
C.C23.A15.C6$3A37.3A$2.A39.A$.A39.A5$2.3A37.3A$4.A39.A$3.A39.A12$16.C
$16.C.C24.C15.C$16.2C23.C.C15.C.C$42.2C15.2C4$52.2D$51.D2.D$10.D6.C
32.D2.D$9.D.D.D2.2C31.D.2D$A.A6.D2.2D2.C.C21.A.A6.D$.2A5.2D31.2A5.2D$
.A39.A3$62.2C$62.C.C$23.C38.C$3A19.2C16.3A$2.A19.C.C17.A$.A39.A5$2.3A
37.3A$4.A39.A$3.A39.A!

The second one on first row, being a 4-glider carrier synthesis itself, directly suggests 7-glider syntheses for xs15_8ljgzxpi6 and xs18_259a4ozy1116413.

Code: Select all

x = 68, y = 23, rule = B3/S23
15bobo37bobo$15b2o38b2o$16bo39bo4$6bo19bo19bo$7bo18bobo18bo$5b3o18b2o
17b3o19bo$65b2o$2o38b2o24b2o$b2o38b2o$o39bo$7b2o38b2o$6bobo37bobo$8bo
11bo27bo$20bobo$20b2o2$50b2o11b2o$20b2o29b2o9b2o$19b2o29bo13bo$21bo!

There is a candidate active region that is a tub-with-tail predecessor on its own, for which I have not found a suitable synthesis:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs12_8k871zzy733 costs 4 gliders (pseudo).
#CLL state-numbering golly
x = 14, y = 15, rule = B3/S23
o$b2o$2o5$12b2o$11b2o$13bo3$2b2o5bo$bobo4b2o$3bo4bobo!
#C [[ STOP 45 ]]

This could have worked:

Code: Select all

x = 10, y = 15, rule = B3/S23
4bo$5bo$3b3o3$2o$b2o$o2$7b3o$7bo$8bo$4b2o$3bobo$5bo!
#C [[ PASTEMODE 6 PASTET 10 PASTE 2o! 6 6 ]]

Inspired by a soup, this works but without clearance:

Code: Select all

x = 20, y = 14, rule = B3/S23
18bo$17bo$3bobo11b3o$4b2o$4bo5$4bobo$5b2o2bobo$bo3bo3b2o$obo7bo$2o!

[confocaloid]

xs28_39c8a6z2552s0cczw321 in 30G if I counted correctly:

Code: Select all

x = 1315, y = 57, rule = B3/S23
799bo$799bobo$799b2o102bo$904bo$902b3o$917bo190bo$192bo723bo191bobo97b
o$193bo722b3o189b2o97bo$191b3o1013b3o$893b2o98b2o98b2o$892bo2bo96bo2bo
96bo2bo$892bobo97bobo97bobo$893bo99bo16b2o81bo16b2o84b2o98b2o$290bo
718bo2bo96bo2bo83b2o13b2o83b2o5b2o$288bobo8b2o98b2o98b2o98b2o98b2o98b
2o98b2o98b2o9b2o87b2o9b2o90b2o7bobo88bo2bo4bo$289b2o8b2o98b2o98b2o98b
2o98b2o98b2o98b2o98b2o98b2o93b4o3bobo7bo82b4o3bobobo3bo$106b2o98b2o98b
2o98b2o98b2o98b2o98b2o77b3o18b2o98b2o98b2o98b2o85bo4bo2bo91bo4bo2bo2bo
4b3o$106b2o5b2o91b2o5b2o84b2o5b2o5b2o73bobo8b2o5b2o5b2o84b2o5b2o5b2o
84b2o5b2o5b2o84b2o5b2o5b2o72bo11b2o5b2o5b2o84b2o5b2o5b2o84b2o5b2o5b2o
84b2o5b2o5b2o78b2o2bobobo91b2o2bobobo$113b2o98b2o84b2o12b2o74b2o8b2o
12b2o84b2o12b2o84b2o12b2o84b2o12b2o71bo12b2o12b2o84b2o12b2o84b2o12b2o
84b2o12b2o82bobobobo93bobobobo$389bo808bo3b2o94bo3b2o$12b2o478b3o97b3o
97b3o97b3o97b3o97b3o97b3o$6b2o4bobo382b2o98b2o98b2o98b2o98b2o98b2o98b
2o98b2o$5bobo4bo96b2o98b2o98b2o86b2o10b2o86b2o10b2o86b2o10b2o86b2o10b
2o86b2o10b2o86b2o10b2o86b2o10b2o86b2o10b2o202b2o$7bo101b2o98b2o98b2o
98b2o98b2o98b2o98b2o98b2o98b2o98b2o98b2o201b2o$191b3o1120bo$193bo8b2o
98b2o98b2o98b2o15bo82b2o98b2o98b2o98b2o98b2o98b2o$16b2o174bo8bobo87b3o
7bobo97bobo97bobo15bobo79bobo97bobo97bobo97bobo97bobo97bobo$16bobo182b
2o90bo7b2o86b2o10b2o98b2o16b2o80b2o98b2o98b2o98b2o98b2o98b2o$16bo182b
2o91bo6b2o89b2o7b2o98b2o98b2o98b2o98b2o98b2o98b2o98b2o$2o196bobo5b2o
90bobo5b2o81bo8bobo5b2o90bobo5b2o90bobo5b2o90bobo5b2o12bo77bobo5b2o90b
obo5b2o90bobo5b2o90bobo5b2o$b2o195b2o5bobo90b2o5bobo90b2o5bobo90b2o5bo
bo90b2o5bobo90b2o5bobo11bo78b2o5bobo90b2o5bobo90b2o5bobo90b2o5bobo$o
204b2o98b2o98b2o98b2o98b2o98b2o12b3o83b2o98b2o98b2o98b2o$203b2o98b2o
98b2o98b2o98b2o5bo92b2o5bo92b2o5bo92b2o5bo92b2o5bo92b2o5bo$202bobo97bo
bo97bobo97bobo97bobo4bobo90bobo4bobo90bobo4bobo90bobo4bobo90bobo4bobo
90bobo4bobo$202b2o98b2o98b2o98b2o98b2o5bobo90b2o5bobo90b2o5bobo90b2o5b
obo90b2o5bobo90b2o5bobo$610bo99bo99bo99bo99bo99bo$105b2o598b2o98b2o98b
2o98b2o98b2o$105bobo596bo2bo96bo2bo96bo2bo96bo2bo96bo2bo$99b3o3bo598bo
2bo96bo2bo3b2o91bo2bo3b2o91bo2bo3b2o91bo2bo3b2o$101bo414b2o187b2o98b2o
4b2o92b2o4b2o92b2o4b2o92b2o4b2o$100bo415bobo$516bo2$99b2o498b2o$98bobo
497bobo15b2o$100bo499bo14b2o$617bo$1089b2o$722b2o365b2o$722bobo$722bo
2$994b2o$993b2o$982bo12bo$982b2o$981bobo!

Based on this soup for xs27_j1u069mggkcz11y066:

Code: Select all

#C https://catagolue.hatsya.com/object/xs27_j1u069mggkcz11y066/b3s23
#C https://catagolue.hatsya.com/hashsoup/C1/c_MX3JiDOVXTJ852599229/b3s23
#C Soup c_MX3JiDOVXTJ852599229 was found on 2023-01-07 at 08:46:57 UTC and is owned by TechnobladeNeverDies
x = 16, y = 16, rule = B3/S23
bobbobboooboobbo$
oooboobobobbobob$
oobobooooboooobb$
bboooobbboooboob$
bobooooooobobbbb$
oobbbobboobobooo$
bbboboboooobobbo$
bobbbobobooboobo$
obooooboooobbobo$
obboobobbbobobbb$
obooooobooobobbo$
ooobobbboboooooo$
bobbobbobooooboo$
bbbbbobooboobbob$
obboooobooboobbo$
bbooobobbboobbbb!
#C [[ ZOOM 4 STOP 466 ]]

Edit: processed in j4811638578.

[Chris857]

Something I ran across that doesn't seem to have been mentioned on the forum: the second synthesis of canoe at https://conwaylife.com/patterns/canoe_synth.rle (the anti-parallel one) is not rewindable.

Code: Select all

x = 19, y = 26, rule = B3/S23
3$3bo$4b2o$3b2o7$12b2o$11b2o$13bo2$9bobo$10b2o$10bo2$10b2o$9b2o$11bo!