Still Life Synthesis Thread

[carsoncheng]

6G amphisbaena:

Code: Select all

x = 33, y = 26, rule = B3/S23
32bo$30b2o$31b2o6$7bo$5bobo$6b2o2$10bo$10bobo$2bo7b2o$3b2o$2b2o$8bo$6b
2o$7b2o4$bo$b2o$obo!

[Chris857]

xs22_wciliczciaiczw1 in 17G based on the 8G_C2_1_stdin result, down from 25G.

Code: Select all

x = 169, y = 45, rule = B3/S23
obo$b2o5bo13bo$bo4bobo11b2o$7b2o12b2o$104bo61bo$104bobo59bobo$27bo76b
2o60b2o$27bobo$27b2o4$95b2o$94bo2bo$86b2o7b2o59b2o$86b2o68b2o2$89bo69b
o$8bo7b2o70bobo67bobo$9bo6b2o69bobobo65bobobo$7b3o77bo3bo65bo3bo$88b3o
67b3o2$86b3o67b3o$27b3o55bo3bo65bo3bo$19b2o6bo57bobobo65bobobo$19b2o7b
o57bobo67bobo$87bo69bo2$89b2o68b2o$80b2o7b2o68b2o$79bo2bo$80b2o4$8b2o
$7bobo$9bo61b2o76b2o$70bobo75bobo$72bo77bo$14b2o12b2o$15b2o11bobo4bo$
14bo13bo5b2o$34bobo!

[AbhpzTa]

xs22_wciliczciaiczw1 in 17G based on the 8G_C2_1_stdin result, down from 25G.

Code: Select all

x = 169, y = 45, rule = B3/S23
obo$b2o5bo13bo$bo4bobo11b2o$7b2o12b2o$104bo61bo$104bobo59bobo$27bo76b
2o60b2o$27bobo$27b2o4$95b2o$94bo2bo$86b2o7b2o59b2o$86b2o68b2o2$89bo69b
o$8bo7b2o70bobo67bobo$9bo6b2o69bobobo65bobobo$7b3o77bo3bo65bo3bo$88b3o
67b3o2$86b3o67b3o$27b3o55bo3bo65bo3bo$19b2o6bo57bobobo65bobobo$19b2o7b
o57bobo67bobo$87bo69bo2$89b2o68b2o$80b2o7b2o68b2o$79bo2bo$80b2o4$8b2o
$7bobo$9bo61b2o76b2o$70bobo75bobo$72bo77bo$14b2o12b2o$15b2o11bobo4bo$
14bo13bo5b2o$34bobo!

Reduced to 12G:

Code: Select all

x = 170, y = 71, rule = B3/S23
130bo$128b2o$129b2o14$128bobo$128b2o$129bo2$30bo$28b2o33b2o48b2o$29b2o
31bo2bo46bo2bo$62bobo47bobo$63bo49bo4$102bo$103b2o$76bobo23b2o63bo$64b
2o10b2o36b2o50bobo$64b2o11bo36b2o49bobobo$80bo84bo3bo$80bobo83b3o$b2o
77b2o$obo161b3o$2bo160bo3bo$5bo111b2o44bobobo$5b2o110b2o45bobo$4bobo
122b2o34bo$128b2o$130bo4$119bo$118bobo$52b2o63bo2bo$53b2o63b2o$52bo2$
103bo$103b2o$102bobo14$102b2o$103b2o$102bo!

[Chris857]

(originally posted the first three here on an older post and only just noticed)
2023-02-21:
xs22_g0gj1ug8oz11078c in 10G, down from 20G, basically directly from an invalid 8G_C2_1_stdin result.

Code: Select all

x = 86, y = 17, rule = B3/S23
56bo$57bo$55b3o25bo$16bobo64bobo$10bo5b2o65b2o$9bobo5bo51b2o3b2o$9bob
o57b2o2bo2bo$10bo62bo2bo$63b2o9b2o$8bo53bo2bo$7bobo52bo2bo2b2o$bo5bob
o53b2o3b2o$b2o5bo45b2o$obo50bobo$55bo25b3o$81bo$82bo!

xs22_c48cil6o8gozy0121 in 10G, down from 32G, from 8G_C2_1_stdin.

Code: Select all

x = 144, y = 55, rule = B3/S23
11bo$9bobo$10b2o$obo$b2o$bo3$3bo46bo$4b2o44bobo$3b2o45b2o5$142bo$141b
o$141b3o3$137b2o$137b2o$128b2o$128bo$129bo$128b2o$127bo2b2o$126bobobo
bo$127b2o2bo$129b2o$129bo$130bo$129b2o$120b2o$120b2o3$115b3o$117bo$116b
o5$27b2o45b2o$26bobo44b2o$28bo46bo3$77bo$76b2o$76bobo$67b2o$67bobo$67b
o!

xs22_c4gf98gzx19f023 in 11G, down from 34G, based on final reaction of 8G_C2_1_stdin result.

Code: Select all

x = 129, y = 29, rule = B3/S23
52bobo$11bo40b2o11bo$12bo40bo10bo$10b3o51b3o2$127bo$126bo$126b3o$30b2o
$30b2o$111b2o8b2o$111bo8bo2bo$113bo7b2o$109b4obo$109bo2bobo2bo$112bob
4o$104b2o7bo$103bo2bo8bo$104b2o8b2o$35b2o$35b2o$98b3o$100bo$99bo2$3o51b
3o$2bo10bo40bo$bo11b2o40bo$12bobo!

2023-02-23:
xs22_642hv0vh84c in 12G, down from 18G, from 8G_C2_1_stdin.

Code: Select all

x = 93, y = 85, rule = B3/S23
o$b2o$2o19$82bobo$71bo10b2o$71bobo9bo$71b2o3$48bo30bobo$47bo31b2o$22b
o24b3o30bo$23b2o$22b2o22$69b2o$68b2o$12bo30b3o24bo$12b2o31bo$11bobo30b
o3$20b2o$9bo9bobo$9b2o10bo$8bobo19$91b2o$90b2o$92bo!

xs22_5b8b5zwad1da in 10G, down from 14G, from 8G_C2_1_stdin.

Code: Select all

x = 73, y = 63, rule = B3/S23
47bo$47bobo$47b2o10$o$b2o$2o37bo$37bobo$38b2o$43bo$44bo$42b3o4$6bo$7b
2o$6b2o12$65b2o$64b2o$66bo4$28b3o$28bo$29bo$33b2o$33bobo$33bo37b2o$70b
2o$72bo10$24b2o$23bobo$25bo!

xs22_6a8obaq32ac in 14G, down from 16G, from one of the (invalid) 8G_C2_1_stdin results.

Code: Select all

x = 131, y = 115, rule = B3/S23
2bo$obo$b2o2$25bo$23bobo$24b2o11$8bo$6bobo$7b2o9$88bo$86b2o$87b2o10$91b
o$90bo$90b3o7$46bo$47b2o$41bo4b2o$42b2o$41b2o8$88b2o$87b2o$83b2o4bo$82b
2o$84bo7$38b3o$40bo$39bo10$42b2o$43b2o$42bo9$122b2o$122bobo$122bo11$105b
2o$105bobo$105bo2$128b2o$128bobo$128bo!

xs22_cikm1mkiczx121 in 10G, down from 12G, from the final reaction of the 8G_C2_1_stdin result.

Code: Select all

x = 56, y = 53, rule = B3/S23
9bo$10b2o40bo$9b2o40bo$51b3o2$o$b2o$2o4$53bobo$53b2o$54bo14$26b2o$26b
2o9$47b2o$47bobo$47bo4$51b2o$50b2o$52bo3$10b3o$12bo$11bo33b2o$45bobo$
45bo!

xs22_g88ml2z0haq452zw1 in 16G, down from 38G, from 8G_C2_1_stdin.

Code: Select all

x = 95, y = 89, rule = B3/S23
79bo$78bo$78b3o10$o$b2o$2o7$80bo$79bo$79b3o7bobo$89b2o$90bo8$20bo$21b
o$19b3o3$39bobo$39b2o42bo$40bo41bo$82b3o$15b3o$17bo$16bo61bo$77bo$77b
3o$10b3o$12bo41bo$11bo42b2o$53bobo3$73b3o$73bo$74bo8$4bo$4b2o$3bobo7b
3o$15bo$14bo7$93b2o$92b2o$94bo10$14b3o$16bo$15bo!

xs22_08o6l96z69a611 in 16G, down from 33G, from an unrewindable 8G_C2_1_stdin result.

Code: Select all

x = 251, y = 209, rule = B3/S23
248bobo$248b2o$218bobo28bo$218b2o$219bo10$232bobo$232b2o$233bo43$68bo
$69b2o$68b2o5$163bobo$140bo22b2o$139bo24bo$64bo74b3o$65b2o$64b2o12$82b
o$83bo$81b3o38$167b3o$167bo$168bo12$185b2o$184b2o$109b3o74bo$86bo24bo
$86b2o22bo$85bobo5$181b2o$180b2o$182bo43$17bo$17b2o$16bobo10$31bo$31b
2o$bo28bobo$b2o$obo!

xs22_08o6p56z6a9611 in 14G, down from 28G, from the final reaction of a 8G_C2_1_stdin result.

Code: Select all

x = 137, y = 53, rule = B3/S23
o$b2o$2o6$40bobo$40b2o69bo$13bo27bo70bo$11bobo96b3o$12b2o15b2o$28bo2b
o$29b2o84b2o$115b2o2$50bo$48b2o$49b2o4$125b2o$122bo2bobo$122b3o2bo$120b
2o3b2o$119bo2b3o$119bobo2bo$120b2o4$16b2o$17b2o$16bo2$130b2o$36b2o92b
2o$35bo2bo$36b2o15b2o$53bobo78b3o$25bo27bo80bo$25b2o108bo$24bobo6$65b
2o$64b2o$66bo!

[carsoncheng]

As the first strict-still-life improvement from the current run of simeks's 4G script, here is xs17_354cgs2qk in 6G (down from 7G) using a modified 6-glider version:

Code: Select all

x = 18, y = 22, rule = B3/S23
15bo$15bobo$15b2o$bo$2bo$3o4$13b2o$12b2o$14bo3$2o5bo$b2o2b2o$o5b2o3$11b
3o$11bo$12bo!

And here is xs20_2llmz122qr in 6G (down from 7G) using the same version:

Code: Select all

x = 33, y = 37, rule = B3/S23
4bo$2bobo$3b2o14$7bo$8b2o7bo$7b2o8bobo$17b2o3$17bo$16b2o$16bobo6$30b3o
$30bo$31bo2$3o$2bo$bo!

EDIT: xs16_gbap56z121 in 5G (down from 6G), after some manual reduction of a 6G result:

Code: Select all

x = 14, y = 21, rule = B3/S23
11bobo$11b2o$12bo2$6b2o$7b2o$6bo4$9b2o$8b2o$10bo2$b2o$obo$2bo2$5b3o$7b
o$6bo!

And here's a massive reduction of xs22_6996kicz6953 from 31G to 6G:

Code: Select all

x = 30, y = 39, rule = B3/S23
22bo$21bo$21b3o7$o$b2o$2o2$10bo$10bobo$10b2o9$5b2o$6b2o$5bo$11bo$10b2o
$10bobo7$27b3o$27bo$28bo!

[Chris857]

xs22_g0si52z1h8ie13zw1 in 12G, down from 44G, from a 6G 8G_C2_1_stdin result and some cleanup.

Code: Select all

x = 176, y = 111, rule = B3/S23
29$132bo$133bo$131b3o5$138b3o2$120bo$121bo$119b3o5$23bo$24bo101b2o$22b
3o9bo91b2o$33bo81bo$33b3o80bo$114b3o2$23bo106bo$24bo104bobo$22b3o103bo
bo$128bo$121b3o2bob2o$126b2o3b2o$129b2obo2b3o$130bo$54b3o71bobo$54bo
72bobo$55bo72bo2$142b3o$43b3o96bo$45bo97bo$44bo9b3o74b2o$54bo76b2o$55b
o5$137b3o$137bo$138bo2$118b3o5$125b3o$125bo$126bo!

xs22_69di4ozx124b96 in 14G, down from 22G, from the final reaction of an 8G_C2_1_stdin result.

Code: Select all

x = 206, y = 69, rule = B3/S23
63bo$61b2o$62b2o20bobo$84b2o$3bobo79bo$4b2o$4bo5$70bo$70bobo$70b2o112b
o$185bo$183b3o6$23bo$24bo178bobo$22b3o178b2o$204bo$189b2o$188bo2bo$189b
obo$186bo3bo$185bobo$180b2o3bo2bo$179bo2bo3b2o$179bobobo$174b2o4b2o2b
o$174b2o6bobo6b2o$182bo2b2o4b2o$183bobobo$179b2o3bo2bo$178bo2bo3b2o$179b
obo$176bo3bo$175bobo$175bo2bo$176b2o$162bo$62b3o97b2o$62bo98bobo$63bo
6$181b3o$181bo$15b2o165bo$14bobo$16bo5$82bo$81b2o$bo79bobo$b2o$obo20b
2o$24b2o$23bo!

[dvgrn]

xs22_g0si52z1h8ie13zw1 in 12G, down from 44G, from a 6G 8G_C2_1_stdin result and some cleanup.

10G from Seeds of Destruction:

Code: Select all

x = 91, y = 91, rule = B3/S23
23bo$24bo$22b3o65bo$88b2o$89b2o29$29bo$30bo$28b3o9bo$39bo$39b3o3$29bo$
30bo$28b3o6$60b3o$60bo$61bo3$49b3o$51bo$50bo9b3o$60bo$61bo29$2o$b2o$o
65b3o$66bo$67bo!

xs22_69di4ozx124b96[/url] in 14G, down from 22G, from the final reaction of an 8G_C2_1_stdin result.

12G from Seeds of Destruction ... really had to believe in the existence of a 1G cleanup on each side, very obstinately, to find this one. Missed it on the first pass and tried all the other glider directions first.

Code: Select all

x = 87, y = 111, rule = B3/S23
6bo$7bo$5b3o19$63bo$61b2o$62b2o20bobo$84b2o$3bobo79bo$4b2o$4bo5$70bo$
70bobo$70b2o8$23bo$24bo$22b3o22$62b3o$62bo$63bo8$15b2o$14bobo$16bo5$
82bo$81b2o$bo79bobo$b2o$obo20b2o$24b2o$23bo19$79b3o$79bo$80bo!

[Chris857]

xs24_178bqabq2sg in 16G, down from 31G.

Code: Select all

x = 202, y = 73, rule = B3/S23
95bo$96b2o$95b2o$137bo$135b2o$136b2o6$128bo$126b2o$127b2o2$90bo$88bob
o$89b2o5$24bo$22b2o$23b2o2$182bo$183bo$181b3o2$186b2o$185bo2bo$186b2o
$28b2o88b2o$28b2o88b2o70bo2bob2o$100b3o85b6obo$187bo7bo$30b3o87b3o64b
ob6o$103b2o81b2obo2bo$103b2o$195b2o$194bo2bo$195b2o2$199b3o$199bo$200b
o3$24b3o$24bo$25bo$3o$2bo$bo$132b2o$132bobo$132bo2$94b2o$95b2o$94bo6$
85b2o$86b2o$85bo$126b2o$125b2o$127bo!

[May13]

9G xs22_4a9raar9a4:

Code: Select all

x = 84, y = 38, rule = B3/S23
16bo$14bobo$15b2o3$42bo$41bo$41b3o$70bo$71bo$69b3o2$81bo$14b2o57b2o5bo
bo$14b2o57b2o5bo2bo$20bo58b2ob2o$19bobo58bobo$19bo2bo57bobo$20b2o57b2o
b2o$80bo2bo$80bobo$81bo5$17b2o$16bobo$18bo3$27b2o$27bobo$27bo2$b2o$obo
$2bo!

Edit: 36G xs22_amgdb871z6421:

Code: Select all

x = 113, y = 18, rule = B3/S23
51bo9bo$49bobo7b2o$50b2o4bo3b2o$54b2o$55b2o3$13bo91b2o$5b2o6bobo41b2o
5bo39bobo$4bo2bo5b2o41bo2bo3bobo37bo6bo$5b2obo48b2obo2bobo38b2o4bobo$
2b3o2bo8b2o36b3o2bo4bo36b3o2bo3b2o$bo2bobo9bobo34bo2bobo41bo2bobobo$bo
bo2b2o8bo36bobo2b2o40bobo2b2o3b2o$2ob2o47b2ob2o42b2ob2o6bobo$67b3o40bo
$67bo$68bo!

10G xs22_ca1tazwanga6:

Code: Select all

x = 25, y = 20, rule = B3/S23
20bo$20bobo$20b2o2$12b2o$11bo2bo$12b2o4bobo$18b2o$obo16bo$b2o20bo$bo
20b2o$5bo16bobo$5b2o$4bobo4b2o$10bo2bo$11b2o2$3b2o$2bobo$4bo!

8G canoe bridge canoe (xs16_ck312kozw123):

Code: Select all

x = 33, y = 33, rule = B3/S23
8bo$7bo$7b3o$23bo$22bo$22b3o3$27bo$o26bobo$b2o24b2o$2o10$2b3o$4bo$3bo
26bo$30bobo$30b2o3$10b2o$9bobo$11bo10bo$21b2o$21bobo!

12G xs18_0g88bl8z1ad11:

Code: Select all

x = 29, y = 25, rule = B3/S23
17bo4bobo$18b2o3b2o$12bo4b2o4bo$13b2o$12b2o5$17b3o6b2o$26bobo$26bo2$2b
o$obo$b2o6b3o5$15b2o$14b2o$5bo4b2o4bo$4b2o3b2o$4bobo4bo!

10G xs22_g8861ug8oz011db, down from 23G:

Code: Select all

x = 117, y = 47, rule = B3/S23
78b2o$78b2o3$75b3o$77bo$31bo44bo$30bo$30b3o4$2bo12bo$obo11bo$b2o3bo7b
3o21bo$7bo30bobo$5b3o30b2o6$90bo$89bobo$89bobo$86b2obo2b2o$86bob2o4bo$
90b4o$90bo$91bo$32bo57b2o$32bobo$32b2o5$115b2o$115b2o$30b2o79b2o$30bob
o77bobo$30bo81bo3$32b3o$32bo$33bo!

10G xs16_ok213213z65, down from 11G:

Code: Select all

x = 70, y = 29, rule = B3/S23
12bo$11bo$8bo2b3o$6b2o37bo$7b2o37bo$44b3o4$4bo15bo28b2o$2bobo15bobo26b
2o$3b2o15b2o$53b2o$53bo$3o15bobo33bo$2bo15b2o33b2o$bo17bo33bo$54bo$11b
3o41bob2obo$11bo44b2ob2o$7b2o3bo$6bobo$8bo53b2o$62b2o3$67b2o$67bobo$
67bo!

8G long^8 canoe (xs16_y3g84213zwg8421z65), down from 9G:

Code: Select all

x = 25, y = 25, rule = B3/S23
obo$b2o$bo2$15bobo$15b2o$16bo$9bobo8bo$4b2o4b2o6b2o$3bobo4bo8b2o$5bo3$
16b2o$15b2o$17bo4$14b3o$16bo$15bo$23b2o$22b2o$24bo!

8G xs16_ci52zw1248a52, down from 11G:

Code: Select all

x = 39, y = 39, rule = B3/S23
12bobo$12b2o$13bo5$24bo$23bo$23b3o4$29bo$29bobo$29b2o3$2o$b2o$o4$38bo$
36b2o$37b2o$3b2o$2bobo$4bo5$9b3o$11bo$10bo8bo$19b2o$18bobo!

Edit (27.02.2023): 4 xs22's (solved xs22_31eo0uizw23w346 using my custom component):

Code: Select all

x = 515, y = 268, rule = B3/S23
bo179bo179bo$2bo179bo179bo$3o177b3o177b3o6$11bo179bo179bo$9bobo177bobo
177bobo$10b2o9bo131bo36b2o9bo131bo36b2o9bo131bo$22bo129bo49bo129bo49bo
129bo$20b3o129b3o45b3o129b3o45b3o129b3o$12bo179bo179bo$10bobo5bo113bo
9bobo45bobo5bo113bo9bobo45bobo5bo113bo9bobo$11b2o6bo112bobo7b2o47b2o6b
o112bobo7b2o47b2o6bo112bobo7b2o$17b3o112b2o9bo53b3o112b2o9bo53b3o112b
2o9bo5$131bo179bo179bo$129b2o178b2o178b2o$6bo123b2o54bo123b2o54bo123b
2o$7b2o178b2o178b2o$6b2o3bobo172b2o3bobo172b2o3bobo$12b2o6bo171b2o6bo
171b2o6bo$12bo8b2o169bo8b2o169bo8b2o$20b2o178b2o178b2o4$25bo179bo179bo
$26b2o13bo164b2o13bo164b2o13bo$25b2o7bo4bobo163b2o7bo4bobo163b2o7bo4bo
bo$35bo4b2o71bo101bo4b2o71bo101bo4b2o71bo$33b3o76bo100b3o76bo100b3o76b
o$112b3o177b3o177b3o$21bo179bo179bo$22b2o15bo162b2o15bo162b2o15bo$21b
2o17bo160b2o17bo160b2o17bo$38b3o177b3o177b3o3$44bo179bo179bo$45bo179bo
179bo$43b3o177b3o177b3o14$82bo179bo179bo$80b2o178b2o178b2o$81b2o178b2o
178b2o9$44bobo177bobo177bobo$45b2o178b2o178b2o$45bo179bo179bo4$71b2o
178b2o178b2o$71bobo177bobo177bobo$73bo179bo179bo$72b2ob2o175b2ob2o175b
2ob2o$73bobo177bobo177bobo$72bo2bo176bo3bo175bo3bo$72b2ob2o176b3o177b
3o$73bo2bo$50b3o20bobo154b3o20b2obo153b3o19bob2o$52bo21bo157bo20bob2o
155bo19b2obo$51bo179bo179bo5$49b2o3bo174b2o3bo174b2o3bo$48bobo3b2o172b
obo3b2o172bobo3b2o$50bo2bobo174bo2bobo174bo2bobo5$40bo179bo179bo$40b2o
178b2o178b2o$39bobo177bobo177bobo$35bo179bo179bo$35b2o178b2o178b2o$34b
obo177bobo177bobo$30bo179bo179bo$30b2o178b2o178b2o$29bobo177bobo177bob
o2$25b3o177b3o177b3o$27bo179bo179bo$26bo179bo179bo10$133bo179bo179bo$
132b2o178b2o178b2o$132bobo177bobo177bobo11$10bo179bo179bo$10b2o178b2o
178b2o$9bobo177bobo177bobo$5bo140b2o37bo140b2o37bo140b2o$5b2o139bobo
36b2o139bobo36b2o139bobo$4bobo139bo37bobo139bo37bobo139bo79$310bobo$
310b2o$311bo$289bobo$290b2o$290bo2$309bo$309bobo$309b2o7$253bobo51bo$
98b2o38b2o48b2o48b2o13b2o33b2o15bobo50b2o$98bo39bo49bo49bo15bo33bo17b
2o50bo$99b3o2bo34b3o2bo44b3o2bo44b3o2bo44b3o2bo64b3o2bo$101b4o36b4o46b
4o46b4o46b4o66b4o2$99b4o36b4o46b4o46b4o46b4o7b2o57b4o$99bo2bo36bo2bo
15bo30bo2bo46bo2bo46bo2bo6bo2bo10bo45bo2b3o$102bobo37bobo11b2o34bobo
47bobo47bobo4bo2bo8b2o52bo11bo$103b2o38b2o12b2o34b2o48b2o7b3o38b2o5b2o
10b2o50b2o10bobo2b2o$252bo123bobo2b2o$107bobo36b2o48b2o48b2o5bo42b2o
71b2o6bo$107b2o37bobo47bo2bo46bo2bo46bo2bo68bo2bo$108bo38bo5b2o42b3o
47b3o47b3o69b2o$153bobo$105b3o45bo41b3o47b5o45b5o$100bo4bo89bo2bo46bo
4bo44bo4bo76b3o$100b2o4bo90b2o49bobo47bobo76bo$99bobo42b2o102b2o48b2o
17b3o58bo$143bobo171bo$145bo172bo$139b2o62b3o$138bobo5b2o55bo$140bo5bo
bo55bo110bo$146bo167b2o$202b2o73b2o35bobo$203b2o73b2o$202bo74bo$209b2o
$209bobo$209bo$312bo$311b2o$311bobo!

Any ideas to make a 3G cleanup?

Code: Select all

x = 38, y = 49, rule = B3/S23
2bo$obo$b2o13$35bo$35bobo$30bo4b2o$29bo$29b3o8$34b2o$33b2o$35bo17$11b
3o$13bo$12bo!

[Chris857]

xs22_31eo0uizw23w346 in 22G, based on the final reaction of an 8G_C2_2_stdin result, down from 35G.

Code: Select all

x = 419, y = 113, rule = B3/S23
309bobo$310b2o$310bo7$299bobo$300b2o$300bo5$309bobo$310b2o$310bo15$347b
o$345bobo$346b2o4$100bobo$101b2o$101bo3$3bobo$4b2o$4bo179bobo47bobo$185b
2o47b2o118bo$185bo18bo30bo117bobo$203bobo146bo2bo$202bo2bo147b2o$203b
2o$357bo$117bo89bo148bobo$102bo13bobo87bobo136bo9bo2bo$102b2o11bo2bo86b
o2bo135bobo9b2o14bo$101bobo12b2o88b2o136bobo24bobo$345bo14b2o9bobo$20b
2o98b2o88b2o147bo2bo9bo$5bo13bo2bo74b3o19bo2bo86bo2bo146bobo$5b2o12bo
bo77bo19bobo87bobo148bo$4bobo13bo77bo21bo89bo$363b2o$23b2o98b2o88b2o147b
o2bo$3o19bo2bo96bo2bo86bo2bo146bobo$2bo19bobo97bobo87bobo148bo$bo21bo
99bo58bo30bo18bo$182b2o47b2o$181bobo47bobo9$370b2o$370bobo$370bo15$407b
o$406b2o$406bobo5$417bo$416b2o$416bobo7$407bo$406b2o$406bobo!

[May13]

7G xs14_321eg84ko, down from 9G:

Code: Select all

x = 145, y = 73, rule = B3/S23
65bobo$65b2o$66bo17$45bo$45bobo$45b2o$2bo$obo$b2o4$131bo$132b2o$131b2o
10b2o$142bobo$33bo101b2o5bo$31b2o102b2o6bo$32b2o110bo$141b3o$17bo122bo
$15bobo123bo$16b2o122b2o32$4b3o$6bo$5bo!

Failed 7G seed of xs13_321eg853:

Code: Select all

x = 27, y = 17, rule = B3/S23
7bo$6bobo6bo$6bobo6bo$7bo7bo$o$o$3o$2b2o$3b2o$2b2o4$25bo$17b2o5b2o$16b
2o6bobo$18bo!

[confocaloid]

18G chucklebait, down from 24G:

Code: Select all

x = 155, y = 87, rule = B3/S23
9bobo$10b2o$10bo3$11bobo$12b2o40bobo$12bo41b2o$55bo5$9bo$7bobo$8b2o$
54bo$52b2o$53b2o$61bo91bo$61bobo88bo$61b2o89b3o7$bo$2bo$3o2$138b2o$
138b2o4$135bo$134bobo$134bob3o$131b2obo4bo$131bobobobobo$133bobob2o$
132bobo$133bo2$136b2o$136b2o10$6b2o$7b2o$6bo$148b2o$148bobo$148bo$63b
2o$62b2o$64bo3$63b3o$63bo$64bo$58bo$57b2o$57bobo$8b2o$7bobo$9bo$57b2o$
3b3o50b2o$5bo52bo$4bo$66b2o$66bobo$66bo$11b3o$13bo$12bo!

Based on a C1 soup around T = 623:

Code: Select all

#C https://catagolue.hatsya.com/hashsoup/C1/c_HBZhB0nr7y7i116288763/b3s23
x = 16, y = 16, rule = B3/S23
bbbooobboooooooo$
bboobbbbooobbboo$
bobbobboobbbbooo$
obbbbobobobboobb$
bboboobobobbboob$
bbbbbobbobbobboo$
boobobbbobbbbooo$
bbbbooobooboboob$
ooooboobobboboob$
booooboboooobbbo$
oobobbbbbooobobo$
obbbbbboobbboobo$
oooboobobboobbob$
obbboboobboobbbb$
bobooboobbobbbbb$
obooobboboooobbo!

Previous synthesis from Catagolue:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs23_4aklb88gzw6a871 costs 24 gliders (true).
#CLL state-numbering golly
x = 251, y = 32, rule = B3/S23
240bo$241bo$239b3o6bo$248bobo$248b2o$4bobo$5b2o102bo81bobo39bo$5bo
103bobo80b2o37bobo$65bo37bo5b2o36bo39bo4bo39b2o6bo$14b2o48bobo35bo
bo41bobo37bobo6bo32b2o9bobo$4bo8bobo47bobo2b2o31bobo2b2o37bobo2bo
34bobo2bo3b2o31bobo8bobo$2bobo10bo47bo2b2obo31bo2b2obo37bo2b3o34bo
2b3o3bobo32bo8bo2b3o$3b2o59b2o36b2o42b2o38b2o51b2o3bo$18b3o44bo37b
o43bob2o38b2o51b2o$18bo44bo38bo4b2o37bo2bobo34b2obo38b2o9b2obo$bo
17bo43b2o37b2o3bobo36b2o2bo35bo2bo37bobo9bo2bo$b2o20b2o82bo79b2o
40bo10b2o$obo8b2o9b2o119b2o$10bobo11bo117bobo3b3ob3o$12bo131bo5bob
o$15b2o132bo3bo$15bobo51b2o$15bo39b2o11b2o$56b2o6b2o4bo$55bo7bobo$
65bo4$62b2o$63b2o$62bo!

[May13]

7G xs21_g88baicz1255d (down from 8G) and 8G xs21_08e1mkicz25521 (down from 10G):

Code: Select all

x = 105, y = 154, rule = B3/S23
2bo$obo$b2o13$38bo$36b2o$37b2o4$25bo$24bo$24b3o9$22bo$22bobo$22b2o72b
2o$95bo2bo$15bobo77bobobob2o$16b2o76b2obobobo$16bo80bobobo$31bo65bo2bo
$30b2o66b2o$30bobo2$98b2o$98b2o5$103b2o$102b2o$104bo69$13bo$14bo$12b3o
8$79b2o$13bo64bo2bo$13bobo63b2obo17bo$13b2o67b3o13b2o$79b2o4bo13b2o$
80bob2obo$80bobobo$81bo12b2o$94b2o2$3o$2bo$bo3$37b2o$36b2o$38bo39b2o6b
2o$78b2o6b2o$15b2o$16b2o$15bo57b2o16b2o$74b2o14b2o$73bo18bo!

[AbhpzTa]

xs38_x39u0u93z8e1ddxdd1e8 in 12G based on a D2_+1 soup, down from 69G:

Code: Select all

x = 166, y = 48, rule = B3/S23
135bo$133bobo$134b2o4$bo$2bo$3o$80bo$81b2o11bobo$80b2o12b2o$95bo2$14bo
$14bobo148bo$14b2o149bo$165bo$80b2o78b2o$80bobo77bobo$81b2o78b2o2$81b
2o78b2o$80bobo77bobo$80b2o78b2o$18b3o144bo$18bo125bo20bo$19bo122bobo
20bo$143b2o2$95bo$80b2o12b2o$81b2o11bobo37bo$80bo53b2o$133bobo5$146b3o
$148bo$147bo4$142b3o$144bo$143bo!

[carsoncheng]

xs11_25icz65 in 5G (down from 6G), from one of my glidercoll searchers:

Code: Select all

x = 17, y = 15, rule = B3/S23
16bo$7bo6b2o$6bo8b2o$6b3o2$b2o$obo$2bo2$6bo$6b2o$5bobo$14b3o$14bo$15b
o!

This leaves just three xs11s to reduce to 5G:
1. xs11_17842sg (long melusine)
2. xs11_321eg8o (amphisbaena)
3. xs11_xg853zca1 (long^5 snake)

[GUYTU6J]

...
And here's a massive reduction of xs22_6996kicz6953 from 31G to 6G...

I wonder, why wasn't it divided into three stages with two synchronized gliders each?
---
xs16_xok2156zc93 edge-shooter in 10G based on this soup

Code: Select all

x = 88, y = 46, rule = B3/S23
69bo$67bobo$68b2o3b2o$72bo2bo$2b3o67bobo$73bo3$69b2o$69b2o$85bo$85bobo
$85b2o2$82b2o$4b2o76b2o$3bo2bo7bobo$4b2o8b2o$15bo$6b2o$6bobo$6bo70b2o$
75bo2bo$75b2o$73b2o$72bobo$71bo$7b3o60bo$9bo60bobo$8bo62b2o12$3o$2bo$b
o8b2o$10bobo$10bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_xok2156zc93 costs 12 gliders (true).
#CLL state-numbering golly
x = 105, y = 18, rule = B3/S23
53bo$54bo2bobo$52b3o2b2o$58bo3$49b2o41bo4b2o$3bo44bobo42bo3b2o$4b
2o4bo39bo40b3o$3b2o3b2o5bobo35b2o42b2o$9b2o4b2o36bo2bo40bo2bo$16bo
38b2o42b2o$bo55b2o42b2o$b2o4b2o48bo2bo33bo6bo2bo$obo5b2o3b2o44b2o
33b2o7b2o$7bo4b2o79bobo3bo$14bo83b2o$98bobo!

very long shillelagh tail trans-tie snake (xs16_xj96zkc32z11) in 10G (three cleanup options) based on this soup

Code: Select all

x = 265, y = 61, rule = B3/S23
66bo$64b2o90bo$65b2o89bobo$156b2o5$40bo99bo99bo$34bo3b2o94bo3b2o94bo3b
2o$34bobo2b2o93bobo2b2o93bobo2b2o$34b2o98b2o98b2o$48bo99bo99bo$46b2o
98b2o98b2o$47b2o98b2o98b2o14$32b2o98b2o98b2o$26b2o4bobo91b2o4bobo91b2o
4bobo$26b2o4bo93b2o4bo93b2o4bo10$49bo99bo99bo$48b2o98b2o98b2o12b3o$48b
obo97bobo97bobo11bo$263bo8$b2o98b2o98b2o$obo97bobo97bobo$2bo99bo99bo5$
17b3o97b3o97b3o$19bo99bo99bo$18bo99bo99bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_xj96zkc32z11 costs 12 gliders (true).
#CLL state-numbering golly
x = 132, y = 37, rule = B3/S23
32bobo$32b2o$33bo7$2bo$obo$b2o12$15bo$14bo66bo39bo$14b3o62b2o38b2o
$75bo4b2o32bobo3b2o$75bobo37b2o$11b2o57bo4b2o38bo$10bobo56bo$12bo
56b3o50b2o$77bo44bobo$65b3o8bobo46bobo$67bo9b2o35bo11b2o$66bo12b2o
bo32bo4b2o6b2obo$79bob2o30b3o3b2o7bob2o$121bo!

xs16_xg84215aczca1 in 10G based on this soup

Code: Select all

x = 53, y = 57, rule = B3/S23
39bo$37b2o$38b2o$14bo$15bo$13b3o2$36bo$35bo15bo$35b3o12bo$50b3o17$43b
2o$30bo11b2o$30bo13bo$30bo$20b3o$22bo22b2o$21bo22b2o$46bo20$3o$2bo$bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_xg84215aczca1 costs 12 gliders (true).
#CLL state-numbering golly
x = 144, y = 15, rule = B3/S23
143bo$141bobo$2bo96bo36bobo3b2o$obo94bobo37b2o$b2o48bo40bobo3b2o
37bo$6bo42b2o42b2o47b2o$4b2o6bo31bobo3b2o41bo47b2o$5b2o4bo33b2o51b
2o37b2o4bo$11b3o31bo51b2o39bo$56b2o35b2o4bo37bo$52bo4bo30b2o4bo35b
2o4bo$51bobo2bo31bobo2bo36bobo2bo$4b3o45bo2bo33bo2bo38bo2bo$6bo46b
2o35b2o40b2o$5bo!

xs16_wok2156zdb in 10G based on this soup

Code: Select all

x = 260, y = 32, rule = B3/S23
233bobo$233b2o$234bo2$225bobo$226b2o$124bo101bo$122bobo$123b2o$144bo$
142b2o$143b2o89b2o$233bo2bo$234b2o$16bo$14b2o96bo99bo$15b2o95bo99bo$bo
99bo10bo88bo10bo20b3o$obo97bobo97bobo$obo97bobo5b3o3b3o83bobo5b3o3b3o$
bo99bo99bo$112bo99bo$19b2o91bo99bo$6b2o10b2o86b2o4bo93b2o4bo$5bo2bo11b
o84bo2bo96bo2bo$6b2o98b2o12b2o84b2o$121b2o$120bo2$258bo$257b2o$257bobo
!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_wok2156zdb costs 12 gliders (true).
#CLL state-numbering golly
x = 113, y = 18, rule = B3/S23
2bo103bobo$obo17bobo83b2o$b2o17b2o79bobo3bo$13bo7bo80b2o$7b3o2b2o
51bob2o33bo6bob2o$9bo2bobo50b2obo40b2obo$8bo54b2o42b2o$61bo2bo40bo
2bo$61b2o42b2o$58bo40b3o$56bobo42bo3b2o$23b3o31b2o41bo4b2o$23bo$
17b2o5bo$17bobo46bo$17bo42b3o2b2o$62bo2bobo$61bo!

22 + 128 = 150 remaining 16-cell still lives to go for 16-in-11.
The only soup for xs16_xok21e8zc93 suggests the following reaction; is it useful for a reduction?

Code: Select all

x = 51, y = 18, rule = B3/S23
49bo$50bo$44bo3bo$45bo2b2o$46b2o2$43bo$2o4b2o14bobobo3bobobo9b2o$2o4b
2o35bo2bo$16bo9bo7bo9b3o$45bobo$3b3o8bobobo3bobobo3bobobo11b3o$2bo3bo
39b2o$bo5bo8bo5bo7bo18bo$bo5bo34b3obo3bo$bo5bo14bobobo3bobobo6bo3bo2b
2o$2bo3bo34bo2bo$3b3o35bobo!

[KtT]

xs25_256o8gzy0mq1zy231ego in 20G:

Code: Select all

x = 206, y = 53, rule = B3/S23
32bobo$32b2o$33bo7$2bo$obo$b2o7$73bobo$74b2o4bo$74bo3b2o$79b2o$121bo$
15bo49bo53bobo$14bo51b2o3b2o47b2o$14b3o48b2o3bobo$72bo61bo57bo$134bob
o55bobo$11b2o121b2o56b2o$10bobo101b2o55b2o$12bo101bo56bo$78bo36b3o54b
3o17b2o$77bobo38bo6bobo47bo15b2o$78b2o37b2o6b2o3bobo41b2o4bo12bo$80b2o
bo35b2obo3bo3b2o44b2obobo$80bob2o35bob2o8bo44bob2o2bo21b2o$181b2o12b2o
6b2o$195bobo7bo$195bo4$133bo4b3o$132b2o4bo$132bobo4bo4$174b2o$175b2o$
174bo22bo$196b2o$196bobo!

[dvgrn]

xs25_256o8gzy0mq1zy231ego in 20G...

My first reaction was that 6G seemed way too expensive for the final step (just adding a boat). But I see that's how Catagolue currently does it elsewhere.

I wonder if QuFince will be able to find something better.

[mniemiec]

My first reaction was that 6G seemed way too expensive for the final step (just adding a boat). But I see that's how Catagolue currently does it elsewhere.
I wonder if QuFince will be able to find something better.

This may be optimal. I've collected many ways of doing this over the years, and most are in the 7-8 glider range (or worse, for pathological geometries). I have only one that uses 6G, and that only works on corners that could accept a boat-bit (e.g. snake, carrier, eater, etc.); this is better than any of them, as it can work in most other situations as well.

[KtT]

xs36_04aabg0s2sgz2ege12lkk8zy21 in 36G, down from 44G:

Code: Select all

x = 381, y = 65, rule = B3/S23
182bo$181bo189bo$175bo5b3o153bo31bobo$48bo124bobo153bo6bo33b2o$47bo119b
obo4b2o151bobo6b3o36bo$47b3o118b2o158b2o3bo39b2o$168bo8bo156bo39b2o$177b
obo152b3o34bo8bobo$177b2o191bo7b2o$170bobo195b3o8bo$2bo168b2o$obo168b
o202bo$b2o3bo112bo47bo51bo5b2o42bo5b2o49bo5b2o33bo5bobo$5bo112bobo45b
obo13bo35bobo5bo41bobo5bo48bobo5bo32bobo5bo$5b3o110bobo45bobo11b2o36b
obo2b3o8bo33bobo2b3o3bo45bobo2b3o33bobo2b3o$117b2obobo42b2obobo10b2o34b
2obobo10bo33b2obobo6bobo4bo37b2obobo35b2obobo$121bobo45bobo5bo43bobo9b
3o35bobo5b2o4bo42bobo38bobo$122bo47bo4b2o45bobo47bobo10b3o41bobob2o35b
obob2o$41b3o123b3o6b2o41b3o2bo44b3o2bo51b3o2bobo33b3o2bobo$119b2o45bo
16bo34bo5bobo4bo36bo5bobo6bo41bo5bobo32bo5bobo$119bobo45b3o12bo36b3o3b
2o4bobo35b3o3bobo4b2o42b3o3bo34b3o3bo$38b3o78bo49bo12b3o36bo9b2o38bo4b
o5bobo43bo40bo$40bo74b2o$39bo74bobo15bo45b3o53b2o$116bo15bobo43bo55bo
bo43b2o$45b2o85b2o45bo54bo44b2o$44b2o235bo$46bo137b2o$125bobo56bobo$125b
2o57bo$126bo$130bo$129b2o$129bobo17$80b2o$81b2o$80bo10$95b3o$97bo$96b
o!

[carsoncheng]

Here is a very promising reaction for xs15_8o651246z32, which currently costs 11 gliders:

Code: Select all

x = 83, y = 42, rule = LifeHistory
6.A$6.A$6.A2$3.3A10.3A$2.A3.A9.3A$.A5.A10.A$.A5.A7.3A$.A5.A6.2A.A$2.A
3.A10.A$3.3A6.2A.A2.A$18.A$14.2A2.2A$.2A11.6A$A2.A10.A3.A3.A$.2A12.3A
3.A.A$15.3A4.2A8$15.3D34.D3.D$6.A8.D36.D3.D$6.A8.3D34.D3.D$6.A8.D.D14.
2A18.D3.D$15.3D16.A9.2A6.D3.D$3.3A37.A$2.A3.A22.A14.2A30.A4.A$.A5.A11.
D8.A3.2A7.A2.A12.D17.A.A2.A$.A5.A12.D5.A7.2A.A2.A3.A13.D15.2A2.A.3A$.
A5.A5.D.D.2D2.D4.A2.A4.5A2.A4.A4.D.D.2D2.D6.A5.2A3.A$2.A3.A13.D5.A2.A
2.4A.2A3.A15.D6.5A2.6A$3.3A13.D8.2A5.2A20.D7.5A.A4.A$28.2A3.2A32.A4.A
.A$33.2A27.2A5.A.2A.A$.2A26.A2.3A27.2A$A2.A24.5A$.2A25.A2.A$29.2A!

The complicated active region on the right of the original seed interacts with the blinker+HF+beehive only twice, which are both shown and simplified on the description on the lower part of the RLE. Perhaps there's a way to make an alternative active region that does the job in ≤4G to constrain the whole reaction into ≤9G (which makes it no more than 10G with the cleanup glider). Maybe a spark_search or QuFince run might help.

EDIT: Solved it in 10G with a later stage of the seed:

Code: Select all

x = 44, y = 33, rule = B3/S23
41bo$40bo$17bo22b3o$15bobo$16b2o2$41bo$41bobo$12bo28b2o$13bo$11b3o$17b
o$15bobo$16b2o3$15b3o$17bo$16bo10bo$28bo2bobo$26b3o2b2o$32bo4$3o$2bo$b
o3$7b2o$6bobo$8bo!

This synthesis isn't quite optimal, though (I've identified at least two points of reduction that could bring it down to 8G)

Anyway, 4 xs15s remain.

[GUYTU6J]

These two were made four days earlier.
xs16_69m88cz6221 in 9G (three cleanup options) based on this soup, using a 2G loaf+blinker as a 1G century seed:

Code: Select all

x = 461, y = 90, rule = B3/S23
69bobo177bobo177bobo$69b2o178b2o178b2o$70bo179bo179bo7$58bo179bo179bo$
56b2o178b2o178b2o$57b2o178b2o178b2o22$56b3o177b3o177b3o2$62b2o178b2o
178b2o$61bo2bo2b2o172bo2bo2b2o172bo2bo2b2o$61bobo3bobo171bobo3bobo171b
obo3bobo$62bo4bo174bo4bo174bo4bo20$56b2o178b2o178b2o$55b2o178b2o178b2o
$57bo179bo179bo7$98b2o178b2o178b2o$98bobo177bobo177bobo$98bo179bo179bo
$b2o178b2o178b2o$obo177bobo177bobo$2bo179bo179bo10$163b2o$b3o160b2o$3b
o159bo$2bo2$438b2o$438bobo$438bo!

Previous record involves a non-trivial component:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_69m88cz6221 costs 13 gliders (true).
#CLL state-numbering golly
x = 105, y = 26, rule = B3/S23
90bo$91b2o$7bobo80b2o$7b2o$8bo$bo86bo13bo$2bo83bobo11b2o$3o43bo3bo
36b2o3bo3bo4b2o$5bobo37bobobobo39bobobobo$5b2o39b2ob2o41b2ob2o$6bo
96b2o$102b2o$94b2o8bo$45bo47bo2bo$46b2o46b2obo$45b2o49bobo$85bo10b
obo$86b2o4b2o3bo$47bo37b2o5bobo$47b2o43bo$40b3o3bobo$42bo$41bo$53b
2o$52b2o$54bo!

xs16_03lo0kcz25201 in one-glider-seed-based 10G based on this soup

Code: Select all

x = 254, y = 28, rule = B3/S23
o79bo79bo79bo$o7bo71bo7bo71bo7bo71bo7bo$o6bobo70bo6bobo70bo6bobo70bo6b
obo$8b2o78b2o78b2o78b2o$163b2o78b2o$162bo2bo76bo2bo$162bo2bo76bo2bo$
85b2o6bo69b2o8bo69b2o8bo$76b2o7bobo5bo79bo79bo$77b2o6bo7bo79bo79bo$11b
o8b2o54bo$11b2o6b2o$10bobo8bo3$239bo$237bobo$238b2o2$240b2o$239bo2bo$
240b2o$163b2o$163bobo$163bo$156b2o$155bobo$157bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_03lo0kcz25201 costs 12 gliders (true).
#CLL state-numbering golly
x = 100, y = 33, rule = B3/S23
46bo$47bo$45b3o12$38bo11bobo45bo$39b2o9b2o37bo6bobo$38b2o11bo38b2o
5b2o$89b2o2$2bo$obo85bo9bo$b2o3bo81b2o7b2o$5bo81bobo7bobo$5b3o40b
2o43b2o$47b2o42bo2bo$49bo40bob2o$54b3o32bo2bo$44b3o7bo34b2o2bo$55b
o38bo$93b2o$51b3o$53bo$52bo!

---
These are from today.
xs16_69jzx1i4ozx121 in 9G based on this soup

Code: Select all

x = 106, y = 29, rule = B3/S23
16bo$15bo$15b3o3bo$20bo$20b3o4$12bo83b3o$11bo70b2o$11b3o67bo2bo9bo5bo$
80bobo2bo8bo5bo$17bo63bo4bo7bo5bo$16b2o69bo2b2o11b2o$3o13bobo69bo2bo4b
3o4bobo$89b2o12bo7$2b2o$3b2o$2bo2$6b2o$5b2o$7bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_69jzx1i4ozx121 costs 13 gliders (true).
#CLL state-numbering golly
x = 119, y = 23, rule = B3/S23
39bo10bo$40bo7bobo$38b3o8b2o3bo$53bo$53b3o4bobo$60b2o$61bo3$2bo45b
o52b2o7bo$obo44bobo50bo2bo7b2o3b3o$b2o44bo2bo48bobo2bo5b2o4bo$5b3o
40b2o16b2o32bo4bo11bo$5bo60bobo37bo$6bo52b2o5bo40bobo$58b2o48b2o$
60bo$116bo$115b2o$110b2o3bobo$64b2o45b2o$63b2o45bo$65bo!

xs16_2eg8oge123 in 9G (three synchronized cleanup options, but in fact there is just a residual block) based on this soup

Code: Select all

x = 209, y = 36, rule = B3/S23
11bo79bo79bo$obo9bo79bo79bo$b2o7b3o33bo43b3o33bo43b3o33bo$bo44bobo77bo
bo77bobo$46b2o78b2o78b2o12$30bo79bo79bo$6b2o22b2o5bo48b2o22b2o5bo48b2o
22b2o5bo$7b2o20bobo4b2o49b2o20bobo4b2o49b2o20bobo4b2o$6bo29bobo42bo4bo
29bobo47bo29bobo$81b2o$80bobo3$26b2o78b2o78b2o$27b2o78b2o52b2o24b2o$
26bo79bo55b2o22bo$161bo3$17b2o78b2o78b2o$18b2o78b2o78b2o$17bo79bo79bo$
43b2o78b2o78b2o$42b2o78b2o78b2o$44bo79bo79bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_2eg8oge123 costs 13 gliders (true).
#CLL state-numbering golly
x = 126, y = 40, rule = B3/S23
123bobo$98bo24b2o$96bobo25bo$97b2o11$62bo$61bo$61b3o$bo52b2o47b2ob
2o$2bo50bobo46bobob2o$3o50bo4b3o41bo$11b2o5bo31b2obo4bo40b2obo$11b
obo3bo32bobo6bo39bobo16bo$11bo5b3o99bo2bobo$117b3o2b2o$4b3o8bo107b
o$6bo7b2o$5bo8bobo8$94b3o$96bo$95bo$121bo$120b2o$120bobo!

18 + 121 = 139 remaining 16-cell still lives to go for 16-in-11.
---
EDIT next day:
xs15_0o4871z8k96 in 9G based on this soup

Code: Select all

x = 31, y = 25, rule = B3/S23
6bo$7b2o$6b2o$28bobo$28b2o$29bo2$2bo13bo$obo11b2o$b2o12b2o6$19bo$13bo
4bobo$14bo3bobo$3b3o6b3o4bo$5bo$4bo2$14b2o$15b2o$14bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs15_0o4871z8k96 costs 11 gliders (true).
#CLL state-numbering golly
x = 107, y = 19, rule = B3/S23
55bo$54bo$54b3o34bo$92bo12bo$90b3o7b2o2bobo$53bo45bo2bo2bo$51b2o
45bobo2b2o$45bo6b2o45bo$46bo10b3o30bo5bo$44b3o10bo33b2o2b2o$40bo
17bo31b2o3bobo$41bo$39b3o2$50bo$obo3b2o42b2o3b2o$b2o3bobo40bobo2bo
2bo$bo4bo47bo2bo$55b2o!

Now solve xs15_31248a51246, xs15_358ge12ko and xs15_4a9la4z321 and we will complete 15-in-10.

[synperiplanar]

decently old, but a 13G synthesis for xs56_ml1u0e93z034baczgs2t53z6a87079c (final step by galoomba):

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs56_ml1u0e93z034baczgs2t53z6a87079c costs 13 gliders (true).
#CLL state-numbering golly
x = 196, y = 59, rule = B3/S23
185bo$185bobo$185b2o11$44bo141bo$44bo46b3o92bo$44bo141bo$89bo5bo$
40b3o3b3o7bo32bo5bo86b3o3b3o$56bobo30bo5bo71bo3bobo$4bo39bo11b2o
42bo64bobo3b2o13bo7bo$3bo40bo46b3o5bobo64b2o4bo13bo6bobo$3b3o38bo
8b2o44bobo84bo6bobo$53bobo44bo93bo$o6bobo43bo$b2o4b2o$2o6bo92bo$
101bobo90bo$44bo56b2o83bo6bobo$44bo46b3o72b2o4bo13bo6bobo$44bo59b
2o59bobo3b2o13bo7bo$89bo5bo8bobo60bo3bobo$40b3o3b3o40bo5bo8bo77b3o
3b3o$89bo5bo$44bo141bo$44bo46b3o92bo$44bo141bo21$137b3o$139bo$138b
o!

edit two and a half years later: what i meant is that i found the base reaction for the final step and constructed the seed but galoomba put the final step together

[GUYTU6J]

xs16_0c9jzcic32 in 9G and xs16_0dbgzcic32 in 10G:

Code: Select all

x = 285, y = 55, rule = B3/S23
7bo$8bo$6b3o$89bo$87bobo3bo$88b2o2bobo$93b2o5$b2o$b2o5b2o$7bobo$9bo72b
2o199bo$83bo198bobo$13bo67bo200bobo$12b2o67b2o197b2obo$12bobo68bo197bo
$83bo197bo$81bob2o197b2o$80bobo190bo9bo$bo78bobo189bobo7bo$b2o78bo191b
o8b2o$obo3$2b2o194bo$bobo193bobo$3bo188b2o3bo2bo72b2o5b2o$191bo2bo3b2o
72bo2bo3bo2bo$5bo186bobo78b2o5b2o$4b2o187bo$4bobo2$275bo$196b2o77b2o$
196b2o76bobo$179b3o$181bo6b3o$180bo7bo$189bo$193b2o$193bobo$193bo4$
167bo$167b2o$166bobo2$153bo$153b2o$152bobo!

Previously they were synthesized with the following component:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs17_0696o8zoge21 costs 10 gliders (true).
#CLL state-numbering golly
x = 105, y = 22, rule = B3/S23
44bo$43bo$43b3o$38bobo35bobo$39b2o36b2o15b2o$39bo37bo15bobo$93bo$
92b2o$81bo$obo76bobo21bo$b2o37bo39b2o2b3o6bo8bo$bo3b3o31bobo44bo5b
obo7b3o$5bo34b2o43bo7b2o$6bo6$86b3o10b2o$88bo9b2o$87bo12bo!

xs16_0ggkq23zc96 in 8G based on the first soup I checked

Code: Select all

x = 98, y = 33, rule = B3/S23
19bo$17b2o6bobo$18b2o5b2o$26bo$3bo$4bo$2b3o4$o$b2o$2o9$89b2o$90bo$10bo
79bob2o$10bobo78bobo$10b2o81bob2o$93b2o2bo$13bo71b2o9b2o$12b2o66b2o2bo
2bo$12bobo64bobo3b2o$8b2o71bo$7bobo$9bo!

Previous record via 17~19-cell intermediates:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_0ggkq23zc96 costs 12 gliders (true).
#CLL state-numbering golly
x = 148, y = 15, rule = B3/S23
58bo33b2o3bobo$obo10bo44bobo32b2o2b2o$b2o8b2o45b2o32bo5bo42bo$bo
10b2o37bo49bo39b3o$50bobo47bobo41bo$51bobo47bo41bo$12b2o38b2o38b3o
7b3o39b3o$12bobo45bo33bo9bo41bo$12bo37b6o3b2o32bo6b4o33b2o3b4o$50b
o2bo2bo2bobo38bo2bobo30bobo3bo2bobo$55b2o47b2o32bo7b2o$11bo5b2o$
10b2o5bobo121b3o$10bobo4bo123bo$142bo!

xs16_0mp3zha6z11 in 9G based on this soup

Code: Select all

x = 26, y = 32, rule = B3/S23
25bo$23b2o$24b2o4$12b3o3$2o$2o3$5b2o$4bobo$6bo2$7b2o$7bobo$7bo2$16b2o$
15b2o$17bo$6b3o$8bo$7bo3$13b2o$13bobo$13bo!

Previous record uses the longer xs17_31248c2c84ko.
xs16_178c2dik8 in 9G based on this soup

Code: Select all

x = 93, y = 34, rule = B3/S23
24bo$22b2o$5bobo15b2o$6b2o$obo3bo$b2o7bo$bo8bobo$10b2o6$83bo$83b3o$86b
o$5bo79b2o$5bo78bo$5bo77bob2o$84bo2bo$85bobo$86bo6$8bobo80bo$8b2o80bo$
9bo80b3o2$8b2o77b2o$8bobo76b2o$8bo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_178c2dik8 costs 12 gliders (true).
#CLL state-numbering golly
x = 145, y = 22, rule = B3/S23
132b2o2bobo$131bobo3b2o$44bo88bo3bo$44bobo$40bo3b2o93bo$41bo97bobo
$39b3o8bobo86b2o$6bo43b2o42bo$5bo45bo42bobo$5b3o82bo3b2o48bo$obo
86bobo42bo7b2o$b2o37b2o43b2obobo39b2obobo7b2o$bo37bobo42bobobo40bo
bobobo$39bo44bo2bobo6bo32bo2bobo$38b2o43b2o3bo6b2o31b2o3bo$95bobo
4$142bo$141b2o$141bobo!

xs16_31246116853 in 9G based on this soup

Code: Select all

x = 33, y = 34, rule = B3/S23
30bobo$30b2o$31bo6$o21bobo$b2o19b2o$2o21bo$10bo$11bo$9b3o2$3bo$bobo$2b
2o7$2b2o$3b2o$2bo$28bo$27b2o$b2o24bobo$2b2o$bo5bo$7b2o$6bobo!

Previous record:

Code: Select all

#C [[ GRID MAXGRIDSIZE 14 THEME Catagolue ]]
#CSYNTH xs16_31246116853 costs 12 gliders (true).
#CLL state-numbering golly
x = 148, y = 24, rule = B3/S23
133bo7bo$131b2o6b2o$132b2o6b2o$obo11bo130b3o$b2o9b2o131bo$bo11b2o
123b2o6bo$46b2o50b2o32b2o3b2o$47bo51bo33bo5bo$46bo51bo33bo$12bo33b
2o50b2o32b2o$12bobo33bo51bo33bo$12b2o34bo51bo33bo$46b2o50b2o32b2o$
46bo9bo41bo32bo$14b2o31bo8bobo40bo32bobo$13b2o31b2o8b2o40b2o33b2o$
15bo36b2o39bobo$51bo2bo39b2o$52b2o40bo$97bo$96b2o$90b2o4bobo$89bob
o$91bo!

128 to go for 16-in-11, that is, 2 + 3 + 128 = 133 to go for n-in-(n-5) where 9 ≤ n ≤ 16. Hopefully the modern glider collision searches and component transfer searches could help with the goal.

[carsoncheng]

xs11_xg853zca1 (long^5 snake) in 5G, down from 6G:

Code: Select all

x = 41, y = 30, rule = B3/S23
bo12bo$2bo11bobo$3o11b2o4$10b2o$9b2o$11bo15$38b3o$38bo$39bo2$5b3o$7bo
$6bo!

Two still lifes (xs11_17842sg, xs11_321eg8o) left for 11-in-5.

Other syntheses from the same round of searching:
xs12_312312ko in 5G, down from 6G:

Code: Select all

x = 18, y = 22, rule = B3/S23
8bo$8bobo$8b2o5bo$15bobo$2bo12b2o$3b2o$2b2o8$13bo$12b2o$12bobo3$3o$2b
o$bo!

Simple 3G fast component applying a dock with loaf, reduces xs21_031e8z8kid1156 from 6G to 5G:

Code: Select all

x = 17, y = 21, rule = B3/S23
15bo$14bo$14b3o5$6b2o$5b2o$7bo2$3o$2bo$bo3$4b3o$6bo$5bo6b2o$11b2o$13b
o!

Finally, xs13_c9jz39c in 5G, down from 7G:

Code: Select all

x = 21, y = 15, rule = B3/S23
19bo$18bo$18b3o2$obo6bo$b2o7bo$bo6b3o6$11bo4bo$11b2o2b2o$10bobo2bobo!

EDIT: Unrelated to the 5-glider searching, here is xs16_8kih3zx11da in 11G, down from 13G:

Code: Select all

x = 72, y = 69, rule = B3/S23
bo$2bo$3o10$48bo$48bobo$15bobo30b2o$16b2o$16bo$48bobo$48b2o$49bo7$44b
o$45b2o$44b2o4$44bobo2bo$45b2o2bobo$45bo3b2o4$46bo$47bo$45b3o3$45b2o$
46b2o$45bo16$23bo$23b2o$22bobo3$70b2o$69b2o$71bo!

EDIT on April 11: Yesterday I found a 4-glider synthesis of xs11_bdz352:

Code: Select all

x = 26, y = 17, rule = B3/S23
2bo$obo$b2o2$7bo$7b2o3bo$6bobo2b2o$11bobo7$24bo$23b2o$23bobo!

This reduces many things involving snakes, such as xs12_31230f9 from 7G to 6G:

Code: Select all

x = 70, y = 17, rule = B3/S23
2bo$obo$b2o2$7bo$7b2o3bo43b2obob2o$6bobo2b2o43bob2obobo$11bobo48bo
3$62b2o$61bobo3bo$63bo3bobo$67b2o$24bo$23b2o$23bobo!

And also some other pseudo still lifes such as xs13_0bdz6952:

Code: Select all

x = 70, y = 17, rule = B3/S23
2bo61bo$obo62b2o$b2o61b2o2$7bo59bo$7b2o3bo43b2obob2o4bobo$6bobo2b
2o43bob2obobo3b2o$11bobo48bo7$24bo$23b2o$23bobo!

And unrelated to these reductions, here is xs13_358gzxo9a4 from 8G to 7G with a direct reduction of the reaction:

Code: Select all

x = 81, y = 39, rule = B3/S23
55bobo$55b2o$56bo6$51bo$52b2o$51b2o$2bo36bo$obo35bobo$b2o35bo2bo
11b2o$5b3o31b2o13b2o$5bo47bo$6bo10$57b2o$57bobo$57bo8$79b2o$78b2o$
80bo!

Another EDIT on April 11: xs15_4a9la4z321 in 10G, down from 11G:

Code: Select all

x = 56, y = 64, rule = B3/S23
54bo$53bo$53b3o27$bo$2bo$3o6$37bo$36b2o$36bobo$22b3o$24bo15b3o$23bo16b
o$41bo3$24b2o$25b2o$24bo4$19bo16bo$19b2o15b2o$18bobo14bobo2b2o$40bobo$
40bo5$41b3o$41bo$42bo!

Two xs15s remain (xs15_31248a51246, xs15_358ge12ko)