Thread for basic questions

[Hunting]

How do you define 'small'? And as far as I know Iwona is definitely not small. Or are you saying that list is using the measure mentioned below?

I was referring solely to the patterns discovered by Rokicki. I agree, Iwona is not contained within a small bounding box, though it's not particularly large either. I didn't really attempt to answer your question about Iwona and Lidka because I don't know the answer, but I suspect it would have involved some targeted survey of combination of small patterns based on long lasting interactions which had been previously discovered.

Rokicki said he improved a few items in the list, while he also included Iwona in the list. I'm confused.

[Hunting]

Can anyone please link to the Russian Herschel Displacement article (I forgot the author)?

[wildmyron]

Can anyone please link to the Russian Herschel Displacement article (I forgot the author)?

I think you meant this article about the Pi heptomino by Nicolay Beluchenku: http://beluch.ru/life/crow/crow1.htm

Rokicki said he improved a few items in the list, while he also included Iwona in the list. I'm confused.

Iwona was already known, it's not one of Rokicki's improvements.

[Hunting]

Can anyone please link to the Russian Herschel Displacement article (I forgot the author)?

I think you meant this article about the Pi heptomino by Nicolay Beluchenku: http://beluch.ru/life/crow/crow1.htm

Rokicki said he improved a few items in the list, while he also included Iwona in the list. I'm confused.

Iwona was already known, it's not one of Rokicki's improvements.

Aha, yeah, it's Pi displacement - I somehow got it wrong.

Yeah, but his improvements are significantly different from Iwona. He also mentioned the reason he excluded arks is "not compact enough". Now I wonder what's the definition of compact?

[Entity Valkyrie 2]

What is the smallest object that has no known glider synthesis?
What is the smallest object proven to have no glider synthesis?

[GUYTU6J]

What is the smallest object that has no known glider synthesis?
What is the smallest object proven to have no glider synthesis?

1)A bunch of xs20
2)45-cell Garden of Eden

[bprentice]

Is anyone interested in exploring 1D CA rules?

Brian Prentice

[mniemiec]

What is the smallest object that has no known glider synthesis?

All still-lifes below 20 bits are solved.
All pseudo-still-lifes below 20 bits are solved; there are 41* unsolved 20-bit ones.
All quasi-still-lifes below 19 bits are solved; there are 9* unsolved 19-bit ones.
All P2 oscillators below 17 bits are solved; there are 14* unsolved 17-bit ones and 19* unsolved 18-bit ones.
All P2 pseudo-oscillators up to 22 bits are solved except 24 21-bit ones, based on a block on one of the unsolved 17-bit P2s.
All higher-period oscillators up to 21 bits are solved, except two* 20-bit P3s and one* 21-bit P4.
All higher-period pseudo-oscillators up to 24 bits are solved, except 9 24-bit pseudo-P3s (3* caterer on caterer, and 6 block on one of the unknown 20-bit P3s).

All spaceships up to 34 bits are solved, except 2* 31- 32-bit c/2 orthogonal ones, 3* 26-, 29- and 30- bit c/3 orthogonals, 3* 27-, 32-, and 33-bit c/4 diagonals, and 3* 34-bit B29s w/glider tag-along. (* see below.)

Code: Select all

x = 160, y = 137, rule = B3/S23
b3o6b3o8b3o24bo22bo26bo$bobbo5bobbo7bobbo4b3o14b4o17b3ob3o22b4o$bo8bo
10bo6bobbo10booboo3bo3bo11bo6boo17booboo3bo$bo3bo4bo3bo6bo3bo5bo10boo
bbo5b4o11boo3bobbo16boobbo5bo$bo3bobobbo3bo7bo4bo3bo9bobbo7bo3bo20bo
13bobbo7b3o$bo4bobobo11bo3bo4bo18bobbobo21b3o20bo3booboo$bbo8bobo7bobo
boo3bo20bo23bo3booboo17bobbobboo$4booboo12bo6bo47bobbobboo22bobbo$81bo
bbo$23boobo$25bo5$8b3o11boo26boo21bo19bo19bo$8bo12boo26boo21boo18boo
18boo$9bo13bo27bo14bo5bobo11bo5bobo11bo5bobo$11boo12bo4b3o20boo10boo
18boo18boo$10boo13b3o4boo18bo12bobo3boobobo8bobo3boobobo8bobo3boobobo$
26b3obobo36bo7boo10bo7boo10bo7boo$9bo23bo13b3obobbo13bo4bo5boo7bo4bo5b
oo7bo4bo5boo$b3o5bobbo13bobo18bobbo17bobbobb6o8bobbobb6o8bobbobb6o$bo
7bo15boobo13boo6bobbo$bbobb5obo14bo14boo5bo$4bo19boobo15bo4b4o26bo18b
oo$5boo20bo17boo4bobo23boo18bobo19boo$25boo18boo30bobo17bo20boo$120bo
7$booboobo8booboobo8booboboo8booboobo8booboobboo7booboo10booboo9boo13b
ooboo10booboobo$bobooboo8booboboo8bobooboo8bobooboo9bobobbobo6bobobo
10bobobobo8bobbooboo8bobobboo8boboboo$61bo3bobo8bo4b3o7bo6bo8bobo3bo7b
o3bobo9bo$bobooboo8booboboo9booboobo8booboobo7booboobbo8bo5bo8bo3b3o7b
oobbobo8booboobbo9bo$booboboo8bobooboo9booboboo8bobooboo13boo9bobobo
10bobo12boboboo12bobo10boboboo$77booboo10booboo11boo16boo10booboobo5$b
oo3boo9booboo10booboo10booboo9bobooboo8boo13boo13boobbo10boobboo9boobb
oo$bo5bo10bobobo10bobobo8bobobo10boobobo10bo13bo4boo8bo3b3o8bo3bo10bob
obbo$3bobo11bo5bo8bo4bo8bo4bo16bo7bo5boo9bobbobo8bo5bo8bo3bo11bobo$bb
ooboo9bo4boo8bo5boo8bo4bo14boo7b4obobo8boo4bo7boo4bo8boo4bo9bobb4o$bbo
3bo9bobobbo9bobo4bo9bo4bo9boobo12bobo9bo5bo8bo4bo9bo6bo8boo4bo$3bobo
11boo3bo9boobbo12bobobo8bobboo11bo3bo9bobobo11bobo12bob3o14bo$bbooboo
14boo13boo10booboo9boo14booboo10booboo9booboo10boobo16boo4$boobobboo7b
ooboo12booboo9boboo11boobbo10booboo9boboobo9boboobo9bobooboo8bobooboo$
boboo3bo7boobo14bobo10boobo10bobobb3o9bobobo8boobob3o7boobob3o7boobobo
9boobobobo$5b3o11bobboo9bo3bo15boo6bo7bo7bo5bo15bo14bo12bo16bo$bboobo
13boobbo8bo5bo7boboo4bo7bo5bo7bo7bo13boo10booboo13bo13boo$3bo16bobo8bo
7bo6boobbobbo9bo3bo8bobo3bobo9boobbo11bo12boo4bo8boobbo$3bobo13bobboo
8b3ob3o10bobbo11bobo10boobbobo10bobobo9bobo12bobb3o9bobobo$4boo13boo
13bobo13boo11booboo14bo14bo10boo15boo14bo4$boobboo9booboo11booboo10boo
boo10booboo9boo13boo14booboo9bo14boo15boobo$bobbobo10boboo12bobo12bobo
12bobobbo8bo4boo7bobo3boo9bobo10b3o4boo6bobo12bobbob3o$3boo11bo6boo7bo
3bo9bo4bo10bo4boo8boboobbo9bo3bo9bo3b3o10bo4bo8bo3boo7boo6bo$4bobo9boo
boo3bo6bo5bo8boo4bo8bo16boboo11boo3bo7bo7bo8bobb3o9boobbo12booboo$3bo
bb3o11bobbo7bobo4bo8bo5bo8b3o32boo7boo5bo9boobo17bo10bo$3boo4bo10bobo
9bobobboo8bobobboo10b3o11boboo11boobbo14bo11bo13boo3boo8bobo$8boo11bo
12bo13bobo16bo10boobbo10bobobo11bobo12bobo11bobobo10boo$34boo13bo16boo
13boo13bo12boo14boo14boo3$bbobboo9boo3boobo6boobboo9booboo12boobo11boo
13boo11bo14boo$bobobbo9bobobboboo7bo3bo10bobobo10bobboo11bobobo9bobbo
10b3o4bo7bo8bo$bbo3boboo8bo12bo3bo11bobbobboo6bobo3boo12boo9bobo3boo9b
obbobo7b3o3b3o$5boobbo8boo11boo3b3o9boo4bo7bo4bo9bo5boo6booboo3bo8bo4b
obo8bobbo$3bobbobo11boboo8bo5bo14bo14bo7bobo4bo14bo9boo5bo12bo$3boobbo
12boobo8bobo19b3o7bobboo8bo3bobo13bo16bo9bobboo$33boo21bo6bobo14bobo
11bobo14bobo9bobo$64bo16bo12boo15boo11bo3$boo4bo8boobboo9boobboo10bobb
3o8boo13boobb3o8b3o12b3o12boo13boobb3o$bobobobboo6bobbobo9bobobbo10bo
13bobobo10bo36boo6bobbobo9bo$5bo11bo17bo10bobbobboo11bobo9bobobboo8bob
oob3o7boboobobo8bobbobo8bobobboo$3bo3bo12bo11bo30bo5bo21bo14bo21bo$bbo
13bobo12bobbobo9bobobobbo8bo6bo8bobbobbo6boo3bobo7boo3bobbo7boo4bo9bo
3bo$bboob3o8bobobboo8boo4bo8boo3bo10boobobobo9bo3bo15bo13bo11boo13bo$
16bo3bo15boo13bo15bo11bo3bo14boo13bo9boo11boobbo$125bo12bo$$47boo$4bo
11boo14boo13bobo$4boboboo6bobo13bobo16bo$bbo6bo37bo3bo$8bo7bobboob3o7b
obboo15bo$boo14bo19bo8boo$7bobo7bo3bobo7boo19bobo$3bobobboo14bo12bobo
8bobobboo$5bo17boo8bobobboo10bo$35bo$$boo4boo7boo3bobo7boo13boobboo10b
o3bo9boo13boo13boo4bo8boo3bo9boo$bobo4bo7bo4bo9bobobboo8bobobbo10bo3bo
bo7bobo5bo6bo7boo5bo5bo8bo4bobo7bobo$5bobo9bobo4boo9bobo12bo10bobbo15b
obobo7bobo3bobo6bobobobbo7bobo15bobo$3bo19bo9bo13bo21boo7bo3bobo44boo
7bo3bo$6bo10bo3bo14bo9bobbobo10boo27b3oboobo10bo3boo8bo20bo$bbobobbo8b
obbobo10bobo11boo21bo8bobobbo38bo6bo8bobo4boo$bboobboo8boo14boobbobo
12bobo7b3obobo10boobbo14b3o9b3ob3o6boobobo10boobbo$37boo13boo13bo14bo
44bo14bobo$$47boo$bboo12boo4bo10boo12bobo11b3o12boo13boo3bo9boo3bo11bo
bo$bbobo11bo5bo11bo16bobo22bobo12bo4bobo7bo4bobo11bo$6bo10bobobobbo8bo
3bo9bo3bo10boboob3o22bobo12bobo11boo4bo$bbobbobo27bobobo14boo5bo14bobb
oob3o14boo13boo7bo4boo$7bo11bo3boo6boo6bo6boo5bo7boo3bobo8bo16bo14bo
15bo$boo35bobo11bobo22bo3bobo11bo3bo10boobbo10bo4bo$7bobo8bobobo9bo5bo
9bobo17bobo24bo30bo4boo$3bobobboo8bobo13bobo13bo18boo12bobo11bobo12bob
o13bo$5bo12bo15bo49boo12boo13boo13bobo$$oo13boo13boo8boo4b3o5b3o5b3o
11bo$o14bo14bobo4boobbo8bobo7bo15bo$bobo12bobo12b3obo9bo4bobo4bobbo4bo
10bo$10bo22bo3b3o9bo3bo7bo14boo$bbobo3b3o6bobo17bo8boo7boo6boo3bo10bo
4b3o$bbo4bo9bo4boo10bobo9bo9bo7bo3bo6bo4bobo$4bobobo10bobobo12bo9bo9bo
7bo3bo11bobo4bo$3boobboo9boobbo23bo9bo7bo3boo6b3o4bo$23b3o45bo13boo$
25bo41bo4bo13bo$72bo13bo$68b3o15bo!

[Hunting]

What's the smallest unstable pattern that have no known glider synthesis?

[Sokwe]

What is the smallest object that has no known glider synthesis?

All spaceships up to 34 bits are solved, except 2* 31- 32-bit c/2 orthogonal ones, 3* 26-, 29- and 30- bit c/3 orthogonals, 3* 27-, 32-, and 33-bit c/4 diagonals, and 3* 34-bit B29s w/glider tag-along. (* see below.)

Code: Select all

x = 160, y = 137, rule = B3/S23
b3o6b3o8b3o24bo22bo26bo$bobbo5bobbo7bobbo4b3o14b4o17b3ob3o22b4o$bo8bo
10bo6bobbo10booboo3bo3bo11bo6boo17booboo3bo$bo3bo4bo3bo6bo3bo5bo10boo
bbo5b4o11boo3bobbo16boobbo5bo$bo3bobobbo3bo7bo4bo3bo9bobbo7bo3bo20bo
13bobbo7b3o$bo4bobobo11bo3bo4bo18bobbobo21b3o20bo3booboo$bbo8bobo7bobo
boo3bo20bo23bo3booboo17bobbobboo$4booboo12bo6bo47bobbobboo22bobbo$81bo
bbo$23boobo$25bo5$8b3o11boo26boo21bo19bo19bo$8bo12boo26boo21boo18boo
18boo$9bo13bo27bo14bo5bobo11bo5bobo11bo5bobo$11boo12bo4b3o20boo10boo
18boo18boo$10boo13b3o4boo18bo12bobo3boobobo8bobo3boobobo8bobo3boobobo$
26b3obobo36bo7boo10bo7boo10bo7boo$9bo23bo13b3obobbo13bo4bo5boo7bo4bo5b
oo7bo4bo5boo$b3o5bobbo13bobo18bobbo17bobbobb6o8bobbobb6o8bobbobb6o$bo
7bo15boobo13boo6bobbo$bbobb5obo14bo14boo5bo$4bo19boobo15bo4b4o26bo18b
oo$5boo20bo17boo4bobo23boo18bobo19boo$25boo18boo30bobo17bo20boo$120bo
7$booboobo8booboobo8booboboo8booboobo8booboobboo7booboo10booboo9boo13b
ooboo10booboobo$bobooboo8booboboo8bobooboo8bobooboo9bobobbobo6bobobo
10bobobobo8bobbooboo8bobobboo8boboboo$61bo3bobo8bo4b3o7bo6bo8bobo3bo7b
o3bobo9bo$bobooboo8booboboo9booboobo8booboobo7booboobbo8bo5bo8bo3b3o7b
oobbobo8booboobbo9bo$booboboo8bobooboo9booboboo8bobooboo13boo9bobobo
10bobo12boboboo12bobo10boboboo$77booboo10booboo11boo16boo10booboobo5$b
oo3boo9booboo10booboo10booboo9bobooboo8boo13boo13boobbo10boobboo9boobb
oo$bo5bo10bobobo10bobobo8bobobo10boobobo10bo13bo4boo8bo3b3o8bo3bo10bob
obbo$3bobo11bo5bo8bo4bo8bo4bo16bo7bo5boo9bobbobo8bo5bo8bo3bo11bobo$bb
ooboo9bo4boo8bo5boo8bo4bo14boo7b4obobo8boo4bo7boo4bo8boo4bo9bobb4o$bbo
3bo9bobobbo9bobo4bo9bo4bo9boobo12bobo9bo5bo8bo4bo9bo6bo8boo4bo$3bobo
11boo3bo9boobbo12bobobo8bobboo11bo3bo9bobobo11bobo12bob3o14bo$bbooboo
14boo13boo10booboo9boo14booboo10booboo9booboo10boobo16boo4$boobobboo7b
ooboo12booboo9boboo11boobbo10booboo9boboobo9boboobo9bobooboo8bobooboo$
boboo3bo7boobo14bobo10boobo10bobobb3o9bobobo8boobob3o7boobob3o7boobobo
9boobobobo$5b3o11bobboo9bo3bo15boo6bo7bo7bo5bo15bo14bo12bo16bo$bboobo
13boobbo8bo5bo7boboo4bo7bo5bo7bo7bo13boo10booboo13bo13boo$3bo16bobo8bo
7bo6boobbobbo9bo3bo8bobo3bobo9boobbo11bo12boo4bo8boobbo$3bobo13bobboo
8b3ob3o10bobbo11bobo10boobbobo10bobobo9bobo12bobb3o9bobobo$4boo13boo
13bobo13boo11booboo14bo14bo10boo15boo14bo4$boobboo9booboo11booboo10boo
boo10booboo9boo13boo14booboo9bo14boo15boobo$bobbobo10boboo12bobo12bobo
12bobobbo8bo4boo7bobo3boo9bobo10b3o4boo6bobo12bobbob3o$3boo11bo6boo7bo
3bo9bo4bo10bo4boo8boboobbo9bo3bo9bo3b3o10bo4bo8bo3boo7boo6bo$4bobo9boo
boo3bo6bo5bo8boo4bo8bo16boboo11boo3bo7bo7bo8bobb3o9boobbo12booboo$3bo
bb3o11bobbo7bobo4bo8bo5bo8b3o32boo7boo5bo9boobo17bo10bo$3boo4bo10bobo
9bobobboo8bobobboo10b3o11boboo11boobbo14bo11bo13boo3boo8bobo$8boo11bo
12bo13bobo16bo10boobbo10bobobo11bobo12bobo11bobobo10boo$34boo13bo16boo
13boo13bo12boo14boo14boo3$bbobboo9boo3boobo6boobboo9booboo12boobo11boo
13boo11bo14boo$bobobbo9bobobboboo7bo3bo10bobobo10bobboo11bobobo9bobbo
10b3o4bo7bo8bo$bbo3boboo8bo12bo3bo11bobbobboo6bobo3boo12boo9bobo3boo9b
obbobo7b3o3b3o$5boobbo8boo11boo3b3o9boo4bo7bo4bo9bo5boo6booboo3bo8bo4b
obo8bobbo$3bobbobo11boboo8bo5bo14bo14bo7bobo4bo14bo9boo5bo12bo$3boobbo
12boobo8bobo19b3o7bobboo8bo3bobo13bo16bo9bobboo$33boo21bo6bobo14bobo
11bobo14bobo9bobo$64bo16bo12boo15boo11bo3$boo4bo8boobboo9boobboo10bobb
3o8boo13boobb3o8b3o12b3o12boo13boobb3o$bobobobboo6bobbobo9bobobbo10bo
13bobobo10bo36boo6bobbobo9bo$5bo11bo17bo10bobbobboo11bobo9bobobboo8bob
oob3o7boboobobo8bobbobo8bobobboo$3bo3bo12bo11bo30bo5bo21bo14bo21bo$bbo
13bobo12bobbobo9bobobobbo8bo6bo8bobbobbo6boo3bobo7boo3bobbo7boo4bo9bo
3bo$bboob3o8bobobboo8boo4bo8boo3bo10boobobobo9bo3bo15bo13bo11boo13bo$
16bo3bo15boo13bo15bo11bo3bo14boo13bo9boo11boobbo$125bo12bo$$47boo$4bo
11boo14boo13bobo$4boboboo6bobo13bobo16bo$bbo6bo37bo3bo$8bo7bobboob3o7b
obboo15bo$boo14bo19bo8boo$7bobo7bo3bobo7boo19bobo$3bobobboo14bo12bobo
8bobobboo$5bo17boo8bobobboo10bo$35bo$$boo4boo7boo3bobo7boo13boobboo10b
o3bo9boo13boo13boo4bo8boo3bo9boo$bobo4bo7bo4bo9bobobboo8bobobbo10bo3bo
bo7bobo5bo6bo7boo5bo5bo8bo4bobo7bobo$5bobo9bobo4boo9bobo12bo10bobbo15b
obobo7bobo3bobo6bobobobbo7bobo15bobo$3bo19bo9bo13bo21boo7bo3bobo44boo
7bo3bo$6bo10bo3bo14bo9bobbobo10boo27b3oboobo10bo3boo8bo20bo$bbobobbo8b
obbobo10bobo11boo21bo8bobobbo38bo6bo8bobo4boo$bboobboo8boo14boobbobo
12bobo7b3obobo10boobbo14b3o9b3ob3o6boobobo10boobbo$37boo13boo13bo14bo
44bo14bobo$$47boo$bboo12boo4bo10boo12bobo11b3o12boo13boo3bo9boo3bo11bo
bo$bbobo11bo5bo11bo16bobo22bobo12bo4bobo7bo4bobo11bo$6bo10bobobobbo8bo
3bo9bo3bo10boboob3o22bobo12bobo11boo4bo$bbobbobo27bobobo14boo5bo14bobb
oob3o14boo13boo7bo4boo$7bo11bo3boo6boo6bo6boo5bo7boo3bobo8bo16bo14bo
15bo$boo35bobo11bobo22bo3bobo11bo3bo10boobbo10bo4bo$7bobo8bobobo9bo5bo
9bobo17bobo24bo30bo4boo$3bobobboo8bobo13bobo13bo18boo12bobo11bobo12bob
o13bo$5bo12bo15bo49boo12boo13boo13bobo$$oo13boo13boo8boo4b3o5b3o5b3o
11bo$o14bo14bobo4boobbo8bobo7bo15bo$bobo12bobo12b3obo9bo4bobo4bobbo4bo
10bo$10bo22bo3b3o9bo3bo7bo14boo$bbobo3b3o6bobo17bo8boo7boo6boo3bo10bo
4b3o$bbo4bo9bo4boo10bobo9bo9bo7bo3bo6bo4bobo$4bobobo10bobobo12bo9bo9bo
7bo3bo11bobo4bo$3boobboo9boobbo23bo9bo7bo3boo6b3o4bo$23b3o45bo13boo$
25bo41bo4bo13bo$72bo13bo$68b3o15bo!

The two c/2 ships and the smallest c/4 diagonal ship were synthesized by Goldtiger997 (see here, here, and here). Also, the following 33-cell c/2 ship and 34-cell 2c/5 ship do not yet have known syntheses:

Code: Select all

x = 41, y = 13, rule = B3/S23
3b3o23bo$3bo2bo3b3o15b3o$3bo6bo2bo13bo3bo$3bo6bo16b2ob2o5bo$4bobo3bo
26b2o$11bobo12b4obo5bob2o$7b2o18bo2bo2b3o2bo$2b3o2b2o24b3o$bo2bo32bo$
4bo32bob2o$o3bo$4bo$bobo!

[mniemiec]

The two c/2 ships and the smallest c/4 diagonal ship were synthesized by Goldtiger997 (see here, here, and here). Also, the following 33-cell c/2 ship and 34-cell 2c/5 ship do not yet have known syntheses:

Code: Select all

x = 41, y = 13, rule = B3/S23
3b3o23bo$3bo2bo3b3o15b3o$3bo6bo2bo13bo3bo$3bo6bo16b2ob2o5bo$4bobo3bo
26b2o$11bobo12b4obo5bob2o$7b2o18bo2bo2b3o2bo$2b3o2b2o24b3o$bo2bo32bo$
4bo32bob2o$o3bo$4bo$bobo!

Thanks for the synthesis links. After examining the synthesis for 31P8H4V0, I found a few improvements that reduce the cost from 189 to 182 gliders (See Small Spaceship Synthesis thread)

The 33-bit block-dragger has syntheses; here are my 12-glider one from 2015-09-01 (top),
which improved your 13-glider one from 2009-09-22 (bottom):

Code: Select all

x = 132, y = 102, rule = B3/S23
77bo$40boo33bobobboo$41bo34boo3bo15bo$oo39bobo37bobo11boo$boo39boo38b
oo12boo$o3boo$4bobo70bo$4bo70bobo$76boo5$89boo$49bobo37boo$49boo34boo$
50bo34boo$52bo$52boo$51bobo3$98b3o$98bo22b3o$99bo21bobbo3b3o$121bo6bo
bbo$50boo69bo6bo$51boo69bobo3bo$50bo78bobo$125boo$80b3o37b3obboo$79bo
bbo36bobbo$82bo39bo$78bo3bo35bo3bo$82bo39bo$79bobo37bobo22$74bo$72bobo
$73boo25bo$98boo$99boo$$74bo5bo$72bobo5boo$73boo4bobo$84b3o$84bo$85bo
3$92bo$90boo$91boo3$84bo9boo$84boo7boo$83bobo9bo$89bo$88boo$88bobo4$
101b3o$101bo$102bo$$121b3o$121bobbo3b3o$121bo6bobbo$121bo6bo$122bobo3b
o$129bobo$125boo$80b3o37b3obboo$79bobbo36bobbo$82bo39bo$78bo3bo35bo3bo
$82bo39bo$79bobo37bobo!

I was unaware of 34P5H2V0.1; it's not on the Wiki. I will add it to my list. Do you have any information about who found it, and when?

[Kazyan]

Here is a solution to one of the p3s in that list:

Code: Select all

x = 551, y = 82, rule = B3/S23
365bo$363bobo$364b2o46bo$407bobo2bobo$407b2o3b2o5bobo$408bo10b2o$420bo
2$414bo$349bo64bobo$350bo63b2o$348b3o2$381bo$380bo$380b3o34bo$416bo$
416b3o2$519bo$414bo102bobo9bo$378bo33b2o104b2o7bobo$376bobo4bo29b2o
113b2o$377b2o4bobo134bo10b2o$383b2o135bo10b2o$520bo2$104bo$103bo289b2o
152bo$97bo5b3o288bo151bobo$95bobo293b3o135b2o15bobo$89bobo4b2o292bo
138bo17bo$90b2o297bobo138bobo$90bo8bo290b2o4b2o$99bobo290b2o2b2o133bob
o14b2o$99b2o291bo138bo4b2o5b2o3bobo$92bobo298bo2b2o135bobobo5b2o3bo$
93b2o297b2o2bo135b2o2bo$93bo303bo4b2o133b3o$145b2o48b2o48b2o48b2o101bo
2bo2bo134bo$146bo49bo49bo49bo100b2o2bo2bo$143b3o47b3o47b3o47b3o106b2o$
92bo49bo49bo7bo41bo49bo$91bobo47bobo11bo35bobo5bo41bobo47bobo$92b2o48b
2o5bo3b2o37b2o5b3o40b2o4b2o42b2o4b2o$94b2o48b2o3bobo2b2o38b2o7b3o38b2o
2b2o44b2o2b2o116b3o$94bo49bo4b2o43bo8bo40bo49bo121bo$10bo84bo49bo49bo
2b2o4bo40bo2b2o45bo2b2o117bo$11bo82b2o48b2o5bo42b2o2bo45b2o2bo45b2o2bo
$9b3o138b2o47bo49bo49bo$150bobo45b2o48b2o50bo3bobo$299b2o3b2o63bo$255b
obo47bo63b2o$151b2o102b2o111bobo$151bobo102bo48b2o$151bo153bobo$241b3o
12b2o47bo$29bo213bo12bobo$28bo213bo9bo3bo$28b3o221b2o$251bobo$24b2o
352b2o40b2o$23bobo353b2o39bobo$25bo352bo41bo4$422b2o$422bobo$422bo10$
2o$b2o$o!

[mniemiec]

Here is a solution to one of the p3s in that list: ...

Very nice! Repositioning one glider in the key step eliminates the debris blinker,
eliminating the need for 1 cleanup glider:

Code: Select all

x = 74, y = 70, rule = B3/S23
14bo$12bobo$13boo46bo$56bobobbobo$56boo3boo5bobo$57bo10boo$69bo$$63bo$
63bobo$63boo3$obo27bo$boo26bo$bo27b3o34bo$65bo$65b3o3$63bo$27bo33boo$
25bobo4bo29boo$26boo4bobo$32boo4$42boo$43bo$40b3o$39bo$38bobo$39boo4b
oo$41boobboo$41bo$42bobboo$41boobbo$46bo4boo$47bobbobbo$46boobbobbo$
51boo4$65b3o$65bo$66bo4$18bo$18boo$17bobo8$27boo40boo$28boo39bobo$27bo
41bo4$71boo$71bobo$71bo!

[Hunting]

Is it possible to apply the SL enumeration script to LeapLife?

[gameoflifemaniac]

Can we make a true SSS breeder with current technology?

[toroidalet]

In 2010, Paul Tooke built a similar device, but it uses sqrt-layers, so it only grows at t^3/2. Still, it would be fairly easy to add a slow-enough gun (Simkin's with a few semi-snarks?), write a glider-pair script, and maybe rebuild the whole thing with modern technology to make it smaller and cheaper.

[gameoflifemaniac]

So what is the easiest synthesizable SS linear growth pattern?

[Naszvadi]

Is anyone interested in exploring 1D CA rules?

Brian Prentice

#metoo

[toroidalet]

Here's a relatively small one, but we'd have to replace those syringes:

Code: Select all

x = 164, y = 165, rule = B3/S23
137bo$136bobo$9bo126bobo$9b3o125bo$12bo$11b2o119b2o7b2o$131bo2bo5bo2bo
$132b2o7b2o2$137bo$2o5b2o127bobo$2o5b2o127bobo$137bo$4b2o$4b2o4$27b2o$
17bo3b2o4b2o$16b2o4b3o$15b2o8bo5b2o$16b5o2bobo5b2o$18b3o3bo$156bo$155b
obo$155bobo$156bo2$151b2o7b2o$70bo79bo2bo5bo2bo$70b3o78b2o7b2o$66bo6bo
$65bobo4b2o82bo$65bobo87bobo$63b3ob2o20bo65bobo$62bo24b3o66bo$56bo6b3o
b2o17bo$56b3o6bob2o17b2o$59bo$46bo11b2o$34bobo7b3o36b2o$35b2o6bo38bo2b
o$35bo7b2o38b2o$28b2o$29bo$29bob2o$30bo2bo$31b2o$46b2o$46b2o23b2o$71bo
$72b3o$74bo2$54bo3b2o$53bobo3bo$49b2obobo3bo$49b2obo4bo$53b5obo$45b2ob
ob2obo4b2o$45bob2obo2bob2o$38b2o12b2obob3o$38b2o19bo2$96b2o$53b2o41bob
o$53b2o43bo$98bobo$99b2o$50b2o$50b2o2$53b2o$53b2o$129b2o$129bo$127bobo
$127b2o$123bo$122bobo$122bobo$123bo4$36b2o$35bobo8b2o$35bo12bo$34b2o9b
2ob2o$44b2o2bo63b2o$43b2o2b2o2bo61bo18b2o$43bo4b2obo61bobo16bobo$50bo
63b2o18bo$134b2o2$127b2obo$42b2o83b2ob3o$42b2o89bo$127b2ob3o$128bobo$
128bobo$129bo3$32b2o68b2ob2o2b2o14b2o$32b2o69bobo2bobo14bobo$103bo2b2o
19bo$104bobo20b2o$29b2o72b2obo2bo$29b2o75bobobo$103b4o2bo$32b2o69bo3b
2o$32b2o54b2o5b2o8bo$88b2o5b2o7b2ob2o$107b2o$37b3o30bo20b2o11b2o$39bo
29bobobo17b2o11bo10b2o$38bo32bo2bo30bo9b2o7b2o$104b2o18bo$21b3o46bo51b
obo$21bo2bo45bo51b2o$23b2o45b2o$70bo3bo$19bo2bo41b2o4bob2o$15b2o3b2o
42b2o4b3o29b2o$14bobo6b2o77b2o$14bo7b3o21bo$13b2o8bo22b2o$20bo2bo21bob
o$21b2o52b2o48b2o$76bo41bo6bobo$24b2o47b3o41bobo5bo17b2o$24b2o24b2o5b
2o14bo43bobo23b2o$50b2o5b2o59bo$119b3o$21b2o30b2o66bo21b3o$21b2o30b2o
88bo2bo$145b2o3$30b2o$30b2o4b2o3bo100b2obo$34b3o4b2o99bo2bo$26b2o5bo8b
2o99b3o$26b2o5bobo2b5o$34bo3b3o3$158bo$37b2o117bobo$38bo118b2o$35b3o
122b2o$35bo124bobo$162bo$162b2o$154b2o$154b2o2$151b2o$151b2o3$154b2o$
154b2o!

[Sokwe]

The 33-bit block-dragger has syntheses; here are my 12-glider one from 2015-09-01 (top),
which improved your 13-glider one from 2009-09-22 (bottom)

Oops.

I was unaware of 34P5H2V0.1; it's not on the Wiki. I will add it to my list. Do you have any information about who found it, and when?

At least I remember this one. I found it on August 8, 2015. This information can be found in the jslife-moving collection (specifically, under velocity-2c5/ships-2c5-unique.rle).

[gameoflifemaniac]

Were any algorithms faster than HashLife or QuickLife ever proposed?

[Macbi]

Were any algorithms faster than HashLife or QuickLife ever proposed?

There was something called HashHashLife proposed by calcyman, but I don't understand how it's supposed to work.

[gameoflifemaniac]

Not including infinite families, how many distinct p2 rotor types are there?

[hkoenig]

You are going to need to define what you mean by "distinct p2 rotor types".

I've cataloged 7811 distinct P2 rotors in sizes from 2 to 118 bits, although lots of them are a single object supporting disjoint rotors.

[Moosey]

Were any algorithms faster than HashLife or QuickLife ever proposed?

There was something called HashHashLife proposed by calcyman, but I don't understand how it's supposed to work.

Obvious basic question then:
Does anyone know how HashHashLife was supposed to work?