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A more layman explaination of LLSSS will also be nice.


I think this is especially unrealistic. I have more or less dedicated my life to the pursuit of math and CS and at this point I think it's fair to say that LLSSS is my magnum opus.

I'm probably not adding much here, but I can say that ...

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Welcome to the forums! It would help if you enclosed your patterns in [ pattern] tags. Notice that there is a "pattern" button above the text box when writing your post. Highlight the pattern in your post and click this button to surround it in [ pattern] tags. Applying this to your first ...

Period-39 glider gun:

Wonderful! I see that it uses the same reaction as a dependent reflector loop by Nora Brown, which I presume you used as the basis for your search:
x = 107, y = 65, rule = B3/S23
94b2o$90b2o2b2o$90bo$91b7o$88b3o2bo3bo4bo$11b2o6bo51b2o6bo7bo3bo3bo5bo
bo ...

Are you planning to add support for searching diagonal and oblique spaceship speeds? What about photons and oscillators?

Unfortunately, none of those types of searches work well with qfind's method.

Diagonal spaceships: memory usage in qfind limits the search width to 10 or 11, which is ...

Conjecture: There exists a strict still life that when hit by a glider in a way, emits a glider 90º relative to input and regenerates itself (ie: glider reflector) .
Had anyone checked?

There no doubt exists a strict still life composed of connected fuses that collapses into a universal ...

I don't know what LLS's --polyomino option does or doesn't do, but to disprove existence of polyomino oscillators or spaceships from considering only a finite patch I think you're going to need a weaker constraint, namely "is this a polyomino as-is" (what I would guess the option does) logically ...

well, if your ultimate goal is unattainable yet, what if you limit the width?

The problem, as I understand it, is that being a polyomino is a global constraint, but LLSSS only tends to work well with certain types of more local constraints. As Amling said, this is a task better suited for a SAT ...

The next interesting code snippet that AI could write for someone in a few minutes, would be a Golly script that takes this list and auto-dedensifies each gun by removing all the cells that it can perfectly well get along without. Anyone want to try it?

I've already written such a script at ...

The proof is quite interesting. Is the result that rule 90 has agars of all periods found in earlier litterature?


Probably, but I didn't find it in a few of the obvious places, or else I would've just cited them for it.

The first such proof was apparently by Mark A. Shereshevsky and ...

If I understand correctly, zfind doesn’t use lookup tables, so doesn’t use as much RAM. If I modified zfind specifically for my rule without lookup tables, would that work?

zfind does use lookup tables. Very large ones, in fact. qfind and Tom's ntzfind use much smaller lookup tables than the ...

Why is LLS saying this in front of all searches I run? /home/hotcrystal/logic-life-search/./lls:40: SyntaxWarning: "\ " is an invalid escape sequence. Such sequences will not work in the future. Did you mean "\\ "? A raw string is also an option.
help="""Impose a symmetry on the pattern Examples ...

TheWayOfTheCon wrote: May 18th, 2026, 12:22 am Is there a command to see all the usable parameters for the program? Or is there a list somewhere?

Run ntzfind with "c" as the only parameter.

B468S02357 wrote: May 17th, 2026, 4:17 am Are there any G3 INT rules where the r-pentomino is a 9-gen spark and the glider is a block puffer with a slope of 9?

That's so exceedingly specific that the likely answer is "not that we know of". It might help if you gave the motivation for this question.

Is there a way to modify ntzfind to use less RAM? I want to search at w11. Or is there a better search program?

Modifying ntzfind to use less RAM would require some major changes to how the lookup tables work, so it's not trivial. Any such modification I can think of would likely slow the search ...

AFAIK, Sokwe's stator reducer only works for B3/S23.

To be clear, my stator optimizer supports all Life-like rules, although Life runs more efficiently. The rule used for stator reduction is just the rule specified in the input file.


I haven't gotten lifelib to compile on my M1 MacBook in the ...

Very strange max partial result glitch when I put in a speed that is above the speed limit for this rule.

This bug was fixed a while ago. The fact that the output says "21 September 2024" indicates that you're using an outdated version. You should upgrade either by compiling from source or using ...

April fools! These were, of course, not constructed by hand. I instead used a python script with OR-Tools to convert grayscale images into still lifes.

The script:
The idea is build an OR-Tools CP-SAT model that records the average brightness of an N-by-N block in the original image and the ...

How much do they cost?

That will have to be determined at auction.


Also, can you do a loaf?

A strange request, but here you go:
#C [[ THUMBNAIL THUMBLAUNCH THUMBSIZE 2 THUMBZOOM 2 WIDTH 600 ZOOM 1 THEME 6 NOSOURCE ]]
x = 242, y = 216, rule = B3/S23
70b2obob2ob2o$66bo2bobob2obobobo ...

How long did it take to make those?

About 3 days each.


I wonder if it'd be possible to write a script that converts an image to a SL?

Could such a thing even be possible? I think only the skilled hand of a true artistic genius such as myself could capture the beauty and raw emotion of their ...

I heard that still lifes are a respected art form, and I thought to myself, "Still lifes? I'm good at those!" I wanted to get my art exhibited in a gallery, but all of the curators I talked to were clearly biased against new, lesser-known talent. They kept saying things like "I don't know who you ...

Is this p6 moderate dot sparker known?...

Here is a very intriguing P->W catalysis that actually rephases the oscillator.

The oscillator is known, and I'm almost certain I've seen it before, but I can't find where it was published. The rotor can be found at line 3575 of the knownrotors file ...

The reason I request it to be a sticky thread is to make sure that any potential new users would see it first before posting, instead of going to the wiki (a highly unlikely event).

There can still be a sticky thread, or even an announcement post that links to a few relevant wiki pages. This ...

I think we should create a locked sticky thread titled "Life & OCA FAQ" and it would consist of all the common questions of CGoL and OCA.

There's no reason for something like that to be exclusively updated by moderators. I propose instead that people use the wiki to construct such guides as ...

I don't see the point of creating an FAQ thread without anything in it, so I have changed the scope of the thread title to focus on discussion of this proposal. If anyone wants to write some questions they think would belong in an FAQ (ideally along with answers), they can do so here.

I believe ...

Why is everyone so aggressive to me lately?

I don't think Amling is being too aggressive here, but rather is trying to emphasize the importance of accurate bug reports. To provide a proper bug report, one should at least make sure that they print the exact command that caused the error and any ...