ConwayLife.com

MDA

Paul Tooke wrote: July 12th, 2012, 9:57 am
[…]

I don't think that it is so weird: it's an 18c/72 glide-symmetric puffer. It was first discovered by Harold McIntosh in March 1994.

[…]

MDA

An unrelated still-life emerges from an interaction involving a middleweight emulator:

Code: Select all

x = 15, y = 10, rule = B3/S23
6b4o$7bo3$2b2o2b3o2b2o$2bo2b5o2bo$3b9o$3o9b3o$o2bo7bo2bo$b2o9b2o!

MDA

Test tube baby eating test tube baby, is this P6 new?:
x = 17, y = 10, rule = B3/S23
3b2o$2bo2bo$2bo2bo$obo2bobo$2o4b2o$9b2o4b2o$9bobo2bobo$11bo2bo$11bo2b
o$12b2o!

Welcome to the forums!

The “test tube baby eating test tube baby” you posted is a p6 oscillator, but it is trivial, meaning no ...

MDA

[…]

Can someone create this?

An implementation:

x = 0, y = 0, rule = ADream
!
[[ RANDOMIZE ]]
@RULE ADream

@TABLE

n_states:5
neighborhood:Moore
symmetries:permute

var a={0,1,2,3,4}
var b=a
var c=a
var d=a
var e=a
var f=a
var g=a
var h=a

var x=a

var i={0,1,2}
var j=i
var k=i
var l=i ...

MDA

[…]

And this gun:
x = 39, y = 39, rule = B3-qr4k5cek6c/S23-a4er56aek
18b3o2$19bo$19bo$9bo19bo$8b3o17b3o$7bobobo7bo7bobobo$6bobobobo6bo6bob
obobo$5bobobobobo4bobo4bobobobobo$4b3obobob3o9b3obobob3o$5bobobobobo11b
obobobobo$6bobobobo13bobobobo$7bobobo15bobobo$8b3o17b3o$9bo9bo9bo$18b
3o$17bobobo ...

MDA

[…]

The first 10-cell p2 is pseudo, if I'm not mistaken. Does mfind also include pseudo patterns?

[…]

mfind uses an algorithm for detecting still-lives similar to the one used by apgsearch. It starts by “infecting” oscillators with a single cell, and applying rules which cause the infection ...

MDA

List of still-lives in this rule with minpop <= 10:

#C 4 bits: 1
#C 5 bits: 0
#C 6 bits: 5
#C 7 bits: 2
#C 8 bits: 8
#C 9 bits: 16
#C 10 bits: 35
x = 59, y = 413, rule = B3-qr4k5cek6c/S23-a4er56aek
bo8bob2o6bo9bobo7bo9bobo$obo7b2obo6b3o7b2obo6b3o7b2obo$bo21bo9bo9bo9bo
$22b2o9b2o5b3o10bobo ...

MDA

p430

...

The middle copperhead at the back is unnecessary:

x = 160, y = 162, rule = B3/S23
95b2o2b2o$97b2o$97b2o$94bobo2bobo6b2o2b2o$94bo6bo6b2o2b2o$83b2o22b3o2b
3o$83b2o9bo6bo5b3o2b3o$82bo2bo9b2o2b2o$82b4o10b4o7bo6bo$81bob2obo20bo
2b2o2bo$82bo2bo11b2o9b6o6b2o2b2o$96bo2bo20b2o2b2o ...

MDA

Some p2 enumeration in Haven (using mfind):

minpop-3: 1 oscillator
minpop-4: 2 oscillators
minpop-5: 0 oscillators
minpop-6: 3 oscillators
minpop-7: 5 oscillators
minpop-8: 7 oscillators
minpop-9: 21 oscillators
minpop-10: 48 oscillators

x = 70, y = 661, rule = B3-ry4acenqt5eir6-ek/S2-a3 ...

MDA

I’m confused. When I click on the link to search for dvgrn’s posts, it says they made only 11,432. Is this a bug?

Some of them are hidden to non-moderators.

A follow-up to this question, but why does Kazyan have 1,253 posts but only 1,252 visible ones?

Edit (October 23rd, 2026, 11:03 PM ...

MDA

[…]

[…] combing very carefully through the current pattern collection looking for anachronisms and obvious gaps that should be filled.

[…]

While I’m here, the oscillator stamp collection present in Golly is outdated — it lacks periods 19 and 41:

x = 6639, y = 649, rule = B3/S23 ...

MDA

mfind has been updated over the last few days with new features and a user manual.

The new features include command-line arguments and deduplication.

Link: https://github.com/HavenMDA/mfind

MDA

An accidental drifter found while minimizing a p3:

Code: Select all

x = 7, y = 10, rule = B3/S23
5b2o$6bo$bob3o$bobo$2obo$2bob2o$2o4bo$bob3o$bobo$2bo!

MDA

NNlk05 wrote: October 18th, 2026, 11:40 pm Testing out my new program...
Code: Select all
…

Is this SCP-LSSS?

MDA

An improved version:

#include <stdio.h>

#define MINPOP 4
#define PERIOD 1

#define DIM ((2 * PERIOD) + MINPOP)

#define DIAG_WIDTH ((2 * MINPOP) - 1)

int testing = 0;

int depth = 0;
int found = 0;
int layers[DIAG_WIDTH] = {0};
int pattern[DIM][DIM] = {0};

char rule[274] = {0};

int ...

MDA

A few months ago, I had the idea to write an oscillator enumerator for INT rules (in C).

I finished a working version of the code today. It may be buggy, but I've tried finding some 20-bit still-lives with it and did not output any unstable patterns.

Sample output:

#C Result 0 ...

MDA

I had an idea like this one quite recently. My idea was to imagine the INT rulespace as a globe with two poles. To center the globe around a given rule, make it a pole.

Including the poles, the globe should have exactly 102 parallels, representing distance from the rule at the pole. For example, if ...

MDA

[…]

Another puffer,corderizeable:

…

Corderized (14 engines, 26c/500o):

x = 530, y = 423, rule = B3aceiq4qtz5jr6ein7e/S2-ci3-aeky4ciqtz5aein6-k7c8
59bo58bo92bo106bo92bo58bo$59bo58bo92bo106bo92bo58bo$37b2o20bo58bo92bo
106bo92bo58bo20b2o$36bobo20bo58bo92bo106bo92bo58bo20bobo$35b5o450b5o ...

MDA

yyh_baboon wrote: October 16th, 2026, 7:24 pm
[…]

managed to cut a few cells off the oscillator:
Code: Select all
…

What about this?:

Code: Select all

x = 7, y = 16, rule = B3/S23-q4i
2o3b2o$obobobo$2bobo$2b3o$2b3o7$2bobo$2b3o2$2b3o$2bobo!

MDA

atanisaduts wrote: October 15th, 2026, 4:43 pm oscillator (can't be bothered to find period)
Code: Select all
…
[…]

The pattern you posted isn’t an oscillator, since it collapses around generation 1750.

MDA

[…]

The climber says to the crawler "You know, I had to learn to crawl before I cud . . ."

[…]

The climber says to the crawler "You know, I had to learn to crawl before I cud . . ."

otismo, the forum rules state that you should

[...]

[...] not post multiple messages consecutively ...

MDA

MDA wrote: October 7th, 2026, 11:32 am
MDA wrote: September 23rd, 2026, 9:40 am The two most recent users have spam pages listed as their websites. […]

[…]

Some problems with spam again. […]

Some problems with spam again. The two users in question are kevinflame47 and iciclecanon.

MDA

Considering the simplicity of CGOL's rules, it's possible that before Conway, some group of kids, or group of cavemen, independently came up with the concept of Life or something similar as a game. So maybe some common patterns in Life, or related CA, would not have been discovered by Conway or ...

MDA

TheWayOfTheCon wrote: October 12th, 2026, 2:48 pm
[…]

[*]UnbelixiumFan (probably not spelled right)

[…]

[*]Period1Glidergun
[/list]

[…]

It’s “UnbihexiumFan”, not “UnbelixiumFan”. The “G” in “Gun” in “Period1GliderGun” is capitalized.

What about derbil0, B468S02357, 1and0nlycordershippr, Anivec, J5L, LuveelVoom, and Aleph, to name a few?

MDA

[...]

Baits which leave a LOT of debris:

x = 21, y = 100, rule = B3/S23-q4i
11bo$11b3o$14bo$13b2o4bo$18bo$18b3o2$9b2o2b2o$5b2o2bo3b2o$5bobob2o$7b
o2bo$7b2o32$16bo$15bo$15b3o2$3bo6b2o$2bobo5b2o$2bobo$3bo$3o11b2o$o13b
obo$16bo$16b2o23$7bo$6bobo$7bo8$12bo$11bo$11b3o2$6b2o$6b2o5$3bo$2bobo
$3bo ...

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Search found 307 matches

Re: Any already known archives of a very common B356/S23 puffer?

Re: Thread For Your Accidental Discoveries

Re: Thread for your unsure discoveries

Re: Rule request thread

Re: Conductive (B3-qr4k5cek6c/S23-a4er56aek)

Re: mfind - a work-in-progress oscillator enumerator for INT

Re: Conductive (B3-qr4k5cek6c/S23-a4er56aek)

Re: c/10 constructions

Re: MDA’s Miscellany of Moore Rules

Re: Thread for your miscellaneous posts and discussions

Re: Suggested patterns for Golly

Re: mfind - a work-in-progress oscillator enumerator for INT

Re: Thread For Your Accidental Discoveries

Re: NNlk05's Big-Bag-'o'-Scripts™

Re: mfind - a work-in-progress oscillator enumerator for INT

mfind - a work-in-progress oscillator enumerator for INT

Re: 2¹⁰²: a macrocosm of rules, accessible in your browser

Re: Baboon's Spaceship (among other things) Hub

Re: Tables (B3/S23-q4i)

Re: Oscillator Discussion Thread

Re: Suggested LifeWiki edits

Re: Thread for your miscellaneous posts and discussions

Re: CA shower thoughts

Re: TheWayOfTheCon's box of the sand

Re: Tables (B3/S23-q4i)