ConwayLife.com

Posted: **January 31st, 2025, 11:59 pm**

This is a 3-state rule which is designed to have many catalysts.

LifeWiki page
Catagolue C1 census
Catagolue D8_1 census
Catagolue D8_4 census
Catagolue D2_+2 census
Catagolue D2_+1 census

Pseudorandom soup:

Code: Select all

#R Stopbox
!
[[ RANDOMIZE ]]

Basic pattern collection:

Code: Select all

x = 106, y = 43, rule = Stopbox
57.3B$57.2BA$57.3B$54.3B$54.BA$54.3B$31.3B$31.BAB$28.6B$12.3B13.BAB$12.
BA.2B11.3B$12.2B.AB$14.3B6$73.B26.B$37.3B32.BAB24.BAB$37.BAB33.B26.B$
37.3B$12.3B7.3B32.B4.3B19.B4.3B$12.BAB7.BAB31.BAB3.BAB18.BAB3.BAB$.B9.
B2.B7.3B14.3B15.B4.3B2.3B2.3B9.B4.3B2.3B2.3B$BAB8.BAB25.BAB25.BA3.BAB
19.2BA2.BAB$.B9.3B25.3B25.3B2.3B19.3B2.3B$62.B.B24.B.B$62.BAB24.BAB$62.
3B5.3B16.3B$70.BAB24.3B$70.B.B24.BAB$60.3B2.3B29.B.B$60.BAB3.AB19.3B2.
3B$60.3B2.3B2.3B4.B9.BAB2.A2B$70.BAB3.BAB8.3B2.3B2.3B4.B$70.3B4.B19.B
AB3.BAB$11.3B10.3B70.3B4.B$11.BA11.BAB34.B$11.3B10.3B33.BAB25.B$37.B5.
B17.B25.BAB$36.BAB3.BAB43.B$37.B5.B!

To do:
Omniperiodic
Turing complete
Find a non-c/2 spaceship
Find a diagonal spaceship
Construct a macro-spaceship

Terminologies:
Box: refer to the common 8-cell 3x3 c/2 orthogonal spaceship.

Code: Select all

x = 3, y = 3, rule = Stopbox
3B$BA$3B!

Dot: refer to the common 9-cell 3x3 still life.

Code: Select all

x = 3, y = 3, rule = Stopbox
3B$BAB$3B!

Cross (or flower): refer to the 5-cell 3x3 still life.

Code: Select all

x = 3, y = 3, rule = Stopbox
.B$BAB$.B!

Flesh: commonly arise from large or sparse soups. Large enough flesh would grow infinitely with help of rakes.

Apparently the 1800th thread. Why I picked those perfect moments to create a thread?

Posted: **February 1st, 2025, 7:26 am**

Probably the smallest period 11 gun:

Code: Select all

x = 9, y = 21, rule = Stopbox
6.B$5.BAB$6.B13$6.3B$6.BAB$.B4.3B$BAB.3B$.B2.BAB$4.B.B!

Posted: **February 2nd, 2025, 1:32 am**

Accidental gun:

Code: Select all

x = 33, y = 19, rule = Stopbox
16.B$15.BAB$16.B3$3B12.3B12.3B$BA13.BAB13.AB$3B12.3B12.3B9$17.3B$17.B
AB$17.3B!

Once I get my computer and compile APGsearch for Stopbox, I will distribute the compiled APGsearch with C1 and D2 symmetries.

Bot idea: find some random soups in Catagolue every day, and post them along with their basic information here.

Posted: **February 2nd, 2025, 2:53 am**

Is there a still-life that is both constructible (from a collision of "boxes") and destructible (by hitting it with "boxes")?

Code: Select all

x = 84, y = 23, rule = Stopbox
37.3B$37.3B$37.BAB5$3B78.3B$2BA78.A2B$3B78.3B2$67.B$66.BAB$67.B$79.3B
$80.AB$79.3B2$12.BAB$12.3B$12.3B21.BAB$36.3B$36.3B!

Here is a highway-robbing 90-degree reflector, there might be a faster one:

Code: Select all

x = 64, y = 10, rule = Stopbox
6.3B$6.BA4B$3B3.4BAB$BAB6.3B$3B2$14.3B44.3B$14.A2B20.3B21.A2B$14.3B
21.AB21.3B$37.3B!

Do you have any ideas for "exploration targets" in this CA? I'm not sure if this forum thread is likely to get many contributions from other people.

Posted: **February 2nd, 2025, 3:00 am**

confocaloid wrote: February 2nd, 2025, 2:53 am Do you have any ideas for "exploration targets" in this CA? I'm not sure if this forum thread is likely to get many contributions from other people.

Stopbox is omniperiodic, (very likely) Turing complete and has many box-constructible patterns.

The current goal is to find a spaceship slower than c/2, and a diagonal spaceship - in fact c/2 is currently the only known speed, and every c/2 spaceships must be made of boxes.

Once I'm on my computer, I'll compile APGsearch for Stopbox.

EDIT:

confocaloid wrote: February 2nd, 2025, 2:53 am Here is a highway-robbing 90-degree reflector, there might be a faster one:
Code: Select all
x = 64, y = 10, rule = Stopbox
6.3B$6.BA4B$3B3.4BAB$BAB6.3B$3B2$14.3B44.3B$14.A2B20.3B21.A2B$14.3B
21.AB21.3B$37.3B!

This is the second smallest known highway robber:

Code: Select all

x = 69, y = 10, rule = Stopbox
3B$BAB$3B4.3B$7.BAB$7.3B2$20.3B$21.AB20.3B20.3B$20.3B21.AB21.AB$43.3B
20.3B!

The smallest highway robber is simply a dot - the first dot that "robs" the box.

Highway robbers are very easy to construct via this way, due to the nature of boxes and dots.

Heisenburp devices are easily constructed; in this example the box creates sparks to activate a reaction that creates another box, but the box isn't actually affected:

Code: Select all

x = 28, y = 16, rule = Stopbox
26.B$25.BAB$26.B$21.3B$17.B3.BAB$16.BAB2.3B$17.B2$3B$BA$3B3$3B$BA$3B!

Posted: **February 2nd, 2025, 3:32 am**

p23 gun shooting a certain p4 spaceship (made to show a way of constructing that spaceship):

Code: Select all

x = 27, y = 41, rule = Stopbox
17.B$16.BAB$4.3B10.B$4.BAB$3.5B8.3B.3B$4.A.A9.2BA.BAB$.B.2B.2B8.3B.3B
$BAB.3B$.B7$18.3B$2.3B.3B8.2B.2B$2.BAB.A2B9.A.A$2.3B.3B8.5B$18.BAB4.B
$18.3B3.BAB$18.BAB4.B$2.3B.3B8.5B$2.BAB.A2B9.A.A$2.3B.3B8.2B.2B$18.3B
7$.B$BAB.3B$.B.2B.2B8.3B.3B$4.A.A9.2BA.BAB$3.5B8.3B.3B$4.BAB$4.3B10.B
$16.BAB$17.B!

Posted: **February 2nd, 2025, 7:42 am**

Three basic logic gates could be constructed using ANDNOT gates.

Code: Select all

NOT A = 1 ANDNOT A
A AND B = A ANDNOT ( 1 ANDNOT B )
A OR B = 1 ANDNOT ( ( 1 ANDNOT A ) ANDNOT B )

Therefore:

Code: Select all

x = 36, y = 114, rule = Stopbox
9.3B6.3B$9.BA7.B$9.3B6.3B$21.B.B$21.B.B$21.3B6$19.3B$19.BAB$19.3B$19.
3BAB$19.BAB.B$19.3B.B$19.3B$19.BAB$19.3B2$21.B$20.BAB$21.B7$23.B$22.B
AB$23.B8$.3B15.3B$.BA16.B$.3B15.3B.B$21.BAB$21.3B5$10.3B6.3B$10.BA7.B
$10.3B6.3B.B$21.BAB$21.3B6$19.3B$19.BAB$19.3B$19.3BAB$19.BAB.B$19.3B.
B$19.3B$19.BAB$19.3B2$21.B$20.BAB$21.B10$7.3B8.3B$.B7.A8.BA$BAB.9B5.3B
$.B2.BA2BA2BAB8.B.B$4.9B8.BAB$21.3B4$9.3B6.3B3.3B6.3B$9.BA7.B7.B7.AB$
9.3B6.3B3.3B6.3B$21.B.B$21.BAB$21.3B6$23.3B$23.BAB$23.3B$21.BA3B$21.B
.BAB$21.B.3B$23.3B$23.BAB$23.3B2$23.B$22.BAB$23.B!

This proves Stopbox Turing complete via a predicted computer, like Conway's Life or Eppstein.

Posted: **February 2nd, 2025, 9:50 am**

Should this thread be for StopBoxINT as well?

Posted: **February 2nd, 2025, 10:12 am**

hotcrystal0 wrote: February 2nd, 2025, 9:50 am Should this thread be for StopBoxINT as well?

No - in fact I won't allow Stopbox variants to appear here.

Posted: **February 2nd, 2025, 1:58 pm**

Is there a thread for Stopbox variants?

Posted: **February 2nd, 2025, 9:51 pm**

unname4798 wrote: February 2nd, 2025, 1:58 pm Is there a thread for Stopbox variants?

No, but I normally post modifications of Stopbox in my rules thread.

Posted: **February 3rd, 2025, 6:53 am**

Oops, the previous OR gate I posted uses an elementary reaction that's nor ANDNOT. This is the correct gate (although larger):

Code: Select all

x = 44, y = 42, rule = Stopbox
7.3B8.3B$.B7.A8.BA$BAB.9B5.3B$.B2.BA2BA2BAB8.B.B$4.9B8.BAB$21.3B4$24.
3B14.3B$26.B15.AB$17.B6.3B14.3B$16.BAB2.B.B$17.B3.BAB$21.3B4$24.3B6.3B
$26.B7.AB$24.3B6.3B$21.B.B$21.BAB$21.3B6$23.3B$23.BAB$23.3B$21.BA3B$21.
B.BAB$21.B.3B$23.3B$23.BAB$23.3B2$23.B$22.BAB$23.B!

Posted: **February 3rd, 2025, 7:20 am**

1-tick advancer:

Code: Select all

x = 65, y = 28, rule = Stopbox
37.A3$63.B$24.A37.BAB$18.A44.B$38.A$53.B$52.BAB2.5B$53.B3.BABAB$57.5B
$3B7.3B$2BA7.BA14.A$3B7.3B17.A$36.A10.A2.A2.A2.A4$25.A7$3B7.3B$2BA7.B
A$3B7.3B!

Posted: **February 3rd, 2025, 7:36 am**

confocaloid wrote: February 3rd, 2025, 7:20 am 1-tick advancer:
Code: Select all

Smaller 1-tick advancer:

Code: Select all

x = 43, y = 21, rule = Stopbox
10.3B$10.BAB$10.3B27.3B$40.2B$3B15.16B6.3B$BA16.BA2BA2BA2BABABAB$3B15.
16B12$3B37.3B$BA38.B$3B37.3B!

EDIT:

p59:

Code: Select all

x = 9, y = 23, rule = Stopbox
3B$BAB$B.B2$4.B$3.BAB$4.B10$4.B$3.BAB$4.B2$6.B.B$6.BAB$6.3B!

Posted: **February 4th, 2025, 1:10 am**

Strange p2:

Code: Select all

x = 9, y = 9, rule = Stopbox
3BA.A3B$BAB3.BAB$3B3.3B$A3.B3.A$3.BAB$A3.B3.A$3B3.3B$BAB3.BAB$3BA.A3B!

Posted: **February 4th, 2025, 2:12 am**

confocaloid wrote: February 2nd, 2025, 2:53 am Is there a still-life that is both constructible (from a collision of "boxes") and destructible (by hitting it with "boxes")?
Code: Select all
x = 84, y = 23, rule = Stopbox
37.3B$37.3B$37.BAB5$3B78.3B$2BA78.A2B$3B78.3B2$67.B$66.BAB$67.B$79.3B
$80.AB$79.3B2$12.BAB$12.3B$12.3B21.BAB$36.3B$36.3B!
[...]

So far I can't seem to find any still-life that is both constructible and destructible. It might be necessary to resort to periodic stationary technology for "destructible" box reflectors, box duplicators, and so on. Is there a p22 box duplicator using this oscillator?

Code: Select all

x = 127, y = 37, rule = Stopbox
91.3B$91.BAB$91.B.B4$54.3B$54.BAB$54.B.B4$124.3B$124.3B$124.BAB15$
117.3B$31.3B24.3B26.3B27.A$32.AB24.A28.A29.3B2.3B$31.3B24.3B2.3B21.3B
2.3B22.A2B2.2BA$58.A2B2.2BA21.A2B2.2BA22.3B2.3B$3B55.3B2.3B21.3B2.3B
29.A$BA63.A28.A27.3B$3B60.3B26.3B!

Posted: **February 4th, 2025, 2:53 am**

Period 41 oscillator from Catagolue D8_1 census:

Code: Select all

x = 33, y = 33, rule = Stopbox
11.3B5.3B$11.BAB5.BAB$11.3B.3B.3B$15.BAB$15.3B2$12.3B3.3B$12.BAB3.BAB
$12.3B3.3B3$3B27.3B$BAB3.3B15.3B3.BAB$3B3.BAB15.BAB3.3B$6.3B15.3B$2.3B
23.3B$2.BAB23.BAB$2.3B23.3B$6.3B15.3B$3B3.BAB15.BAB3.3B$BAB3.3B15.3B3.
BAB$3B27.3B3$12.3B3.3B$12.BAB3.BAB$12.3B3.3B2$15.3B$15.BAB$11.3B.3B.3B
$11.BAB5.BAB$11.3B5.3B!

This is the first ever p46 oscillator to appear in any Catagolue census:

Code: Select all

x = 26, y = 26, rule = Stopbox
12.3B$13.AB$2.3B7.3B$2.BAB$2.3B7.3B$12.BAB$12.3B5$19.3B.3B$B.B.3B12.B
AB.BAB$BAB.BAB12.3B.B.B$3B.3B5$11.3B$11.BAB$11.3B7.3B$21.BAB$11.3B7.3B
$11.BA$11.3B!

Reduced:

Code: Select all

x = 22, y = 22, rule = Stopbox
12.3B$13.AB$2.3B7.3B$2.BAB15.B$2.3B7.3B4.BAB$12.BAB5.B$12.3B6$B.B.3B$
BAB.BAB$3B.3B5$4.B$3.BAB$4.B!

EDIT:
Period 47 from D2_x:

Code: Select all

x = 17, y = 17, rule = Stopbox
10.4B$10.BABA.2B$10.4B.AB$7.2B.B3.3B$7.BA.BABA$5.4BA3B$5.BAB$3.5B$3.B
AB$5.A$6B$BAB.AB$3B.2B$BAB.A$3.B$.BAB$.3B!

Posted: **February 4th, 2025, 4:48 am**

b-engine wrote: February 4th, 2025, 2:53 am Reduced [p46]:
Code: Select all
x = 22, y = 22, rule = Stopbox
12.3B$13.AB$2.3B7.3B$2.BAB15.B$2.3B7.3B4.BAB$12.BAB5.B$12.3B6$B.B.3B$
BAB.BAB$3B.3B5$4.B$3.BAB$4.B!

Even smaller:

Code: Select all

x = 12, y = 27, rule = Stopbox
2.B$.BAB$2.B5$2.3B$2.BAB5.B$2.3B4.BAB$10.B7$B.B.3B$BAB.BAB$3B.3B5$4.B
$3.BAB$4.B!

EDIT: Minimal form?

Code: Select all

x = 9, y = 23, rule = Stopbox
2.B$.BAB$2.B$2.3B$2.BAB2.B$2.3B.BAB$7.B7$B.B.3B$BAB.BAB$3B.3B5$4.B$3.
BAB$4.B!

Also, there are similar p43 and p40:

Code: Select all

x = 9, y = 20, rule = Stopbox
2.B$.BAB$2.B$2.3B$2.BAB2.B$2.3B.BAB$7.B7$4.3B$4.BAB$B.B.3B$BAB$B.B.B$
3.BAB$4.B!

Code: Select all

x = 9, y = 19, rule = Stopbox
2.B$.BAB$2.B$2.3B$2.BAB2.B$2.3B.BAB$7.B7$4.3B$B.B.BAB$BAB.3B$B.B.B$3.
BAB$4.B!

Posted: **February 4th, 2025, 10:17 am**

P20-powered 4c/8 gun, and an eater for the spaceships:

Code: Select all

x = 51, y = 24, rule = Stopbox
10.3B25.3B$10.BAB25.BAB$10.3B9.3B13.3B$22.BAB$.3B18.3B22.4B$.2AB43.B2.
A$4B43.4B$B2A44.A2.B$3B44.4B13$22.B$21.BAB$22.B!

EDIT:
The first semi-natural spaceship that's not period 2^n:

Code: Select all

x = 16, y = 9, rule = Stopbox
3B$BA$3B2.3B.3B$5.BA2.2BA$3.5B.3B$3.A2.A6.3B$3.4B.3B2.2BA$8.2BA2.3B$8.
3B!

Catagolue

Posted: **February 5th, 2025, 10:18 pm**

b-engine wrote: February 4th, 2025, 10:17 am [...] The first semi-natural spaceship that's not period 2^n: [...]

It can reflect a box 180 degrees (with 2-cell lane difference), it can delay a box by 13, 14 or 15 ticks, and it can duplicate a box, all without permanent change or damage to the spaceship. I don't know if this would be useful for something, though, since a box cannot catch up to the spaceship of the same speed moving in the same direction:

Code: Select all

x = 54, y = 88, rule = Stopbox
3B$BA$3B2.3B.3B$5.BA2.2BA$3.5B.3B$3.A2.A6.3B$3.4B.3B2.2BA$8.2BA2.3B$
8.3B12$3B$BA$3B2.3B.3B$5.BA2.2BA$3.5B.3B$3.A2.A6.3B$3.4B.3B2.2BA$8.2B
A2.3B$8.3B11$3.BAB$3.3B$3.3B9$15.B.B$15.BAB$15.3B10$27.BAB$27.3B$27.
3B9$39.B.B$39.BAB$39.3B10$51.BAB$51.3B$51.3B!

Posted: **February 6th, 2025, 12:37 am**

Rakes are common, and boxes could annihilate or eat other boxes, therefore it's possible for such spaceship made of these components to appear in Catagolue.

Code: Select all

x = 41, y = 20, rule = Stopbox
3B$BA$3B11$18.3B$18.BA14.3B$18.3B13.BA$34.3B$36.A.3B$38.BA$38.3B!

However no known spaceships with period above 12 had occurred.

EDIT:
Fixed the RLE.

-

This semi-natural p75 has a semi-natural tetramer, both from D8_1 census:

Code: Select all

x = 14, y = 14, rule = Stopbox
.3B$.BAB$.3B$2A3$3B$BAB$3B2$11.3B$5.3B3.BAB$5.BAB2.A3B$5.3B2.A!

EDIT 2:
The D8_1 census reached the 30 million objects milestone! Thanks to the sole contribution of myself.

EDIT 3:

confocaloid wrote: February 4th, 2025, 2:12 am So far I can't seem to find any still-life that is both constructible and destructible. It might be necessary to resort to periodic stationary technology for "destructible" box reflectors, box duplicators, and so on.

Similar period-20 technologies are possible and easier, provided that p20 oscillators are more common, easier to construct, and smaller. These are the reactions between a box and a p20:

Code: Select all

#C 1. Eating a box
#C 2. Shift a box 4 cells towards the catalyst
#C 3. Eating a box, but produce a spark with more clearance
#C 4. Reflecting a box 180°
x = 79, y = 31, rule = Stopbox
66.3B$66.3B$3B20.3B40.BAB$BAB20.3B$B.B20.BAB19.3B$45.3B$45.BAB20$9.3B
20.3B19.3B18.3B$9.B2A20.B2A19.B2A18.B2A$9.4B19.4B18.4B17.4B$10.2AB20.
2AB19.2AB18.2AB$10.3B20.3B19.3B18.3B!

Posted: **February 7th, 2025, 1:21 am**

b-engine wrote: February 6th, 2025, 12:37 am [...] Similar period-20 technologies are possible and easier, provided that p20 oscillators are more common, easier to construct, and smaller. These are the reactions between a box and a p20: [...]

Here is a statorless p80 box loop with five boxes and four p20 90-degree reflectors. The reflector (found while looking for a box duplicator) is "strange" in in that one of two boxes from which it's made participates in a 2-to-2 reaction with the incoming box (and is replaced by a new box from the 2-to-2 reaction):

Code: Select all

x = 79, y = 79, rule = Stopbox
62.B.B.B$62.B3.B$62.5B$64.3B$64.BAB7$62.BAB$5B8.3B17.3B26.3B$2.2BA8.B
19.2BA26.5B$B.3B6.3B.B17.3B26.B3.B$2.B8.A2B48.B.B.B$3B8.5B7$64.3B$64.
3B$64.BAB8$12.BAB$12.3B$12.3B27$66.2B8.3B$12.B.B.B50.A8.B$12.B3.B6.3B
37.5B6.3B.B$12.5B6.A2B37.A2B8.A2B$14.3B6.3B37.3B8.5B$14.BAB7$12.BAB$
12.3B$12.5B$12.B3.B$12.B.B.B!

Posted: **February 7th, 2025, 1:29 am**

confocaloid wrote: February 7th, 2025, 1:21 am Here is a statorless p80 box loop with five boxes and four p20 90-degree reflectors. The reflector (found while looking for a box duplicator) is "strange" in in that one of two boxes from which it's made participates in a 2-to-2 reaction with the incoming box (and is replaced by a new box from the 2-to-2 reaction):
...

Technically you could say that the box in the p20 that participated in the two-to-two reaction is swapped with the incoming box.

The p20 and p22 produces this spark (shown below, ignoring the box produced in generation 6), and the box produced before the spark dissipate is the reason why they exist.

Code: Select all

x = 3, y = 4, rule = Stopbox
A$3B$BA$3B!

Posted: **February 7th, 2025, 1:54 am**

confocaloid wrote: February 7th, 2025, 1:21 am [...] The reflector (found while looking for a box duplicator) [...]

More p20 components, including several 90-degree box reflectors, several box duplicators with two 90-degree outputs, 180-degree box reflectors, and a spark-producing interaction:

Code: Select all

x = 297, y = 143, rule = Stopbox
142.3B$142.3B$142.BAB8$172.3B$172.3B$172.BAB8$202.3B$202.3B$202.BAB2$
135.3B$135.ABA$135.6B$138.ABA$138.3B2$232.3B$232.3B$232.BAB2$175.3B$
175.ABA$172.6B$172.ABA$172.3B$78.3B$78.3B181.3B$78.BAB181.3B$262.BAB
6$204.3B$205.AB$12.3B27.3B27.3B124.3B2.3B85.3B$12.3B27.3B27.3B124.BA
91.3B$12.BAB27.BAB27.BAB124.3B90.BAB6$234.3B$78.3B153.A2B$78.3B148.3B
2.3B$78.BAB148.2BA$229.3B2$258.3B$258.ABA$255.6B$255.ABA$255.3B6$285.
6B$285.A2.2BA$283.8B$283.A2B2.A$283.6B4$2.3B2.3B23.5B25.3B$2.A4.BA24.
2ABA26.B2A$10B20.8B25.4B$.AB4.A23.AB2A29.2AB$3B2.3B22.5B29.3B4$232.3B
$232.3B$232.BAB8$262.3B$262.3B$262.BAB8$292.3B$292.3B$292.BAB6$228.3B
$228.BA$228.3B4.3B$236.AB$235.3B6$258.3B$258.2BA$258.3B4.3B$265.A2B$
265.3B6$289.3B$289.BA$289.3B2.3B$295.AB$294.3B!

Posted: **February 7th, 2025, 9:23 pm**

Pseudorandom gun powered by a "replicator in a tube":

Code: Select all

x = 52, y = 11, rule = Stopbox
50B$BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BABAB$50B2$23.A$48B.
2B$BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BA2BAB.AB$48B.2B$49.3B$49.
BAB$49.3B!

EDIT:
This is a trivial p176 found in a D8_1 soup (from Catagolue):

Code: Select all

x = 31, y = 31, rule = Stopbox
10.3B5.3B$10.BAB5.BAB$10.B2.B3.B2.B$11.BAB3.BAB$7.3B.3B3.3B.3B$7.BAB11.
BAB$7.3B3.5B3.3B$4.3B7.BAB7.3B$4.BAB7.3B7.BAB$4.3B17.3B$3B25.3B$BA.2B
7.3B.3B7.2B.AB$2B.AB6.2BAB.BA2B6.BA.2B$2.3B.B4.BA5.AB4.B.3B$6.3B2.2B.
3B.2B2.3B$6.BAB5.BAB5.BAB$6.3B2.2B.3B.2B2.3B$2.3B.B4.BA5.AB4.B.3B$2B.
AB6.2BAB.BA2B6.BA.2B$BA.2B7.3B.3B7.2B.AB$3B25.3B$4.3B17.3B$4.BAB7.3B7.
BAB$4.3B7.BAB7.3B$7.3B3.5B3.3B$7.BAB11.BAB$7.3B.3B3.3B.3B$11.BAB3.BAB
$10.B2.B3.B2.B$10.BAB5.BAB$10.3B5.3B!

Decomposed into a p16 and a p22:

Code: Select all

x = 46, y = 27, rule = Stopbox
28.3B3.3B$28.BAB3.BAB$24.3B.3B3.3B.3B$24.BAB11.BAB$24.3B3.5B3.3B$21.3B
7.BAB7.3B$21.BAB7.3B7.BAB$.3B17.3B17.3B$.BAB$B2.B15.3B7.3B.3B7.3B$BAB
16.BAB6.2BAB.BA2B6.BAB$3B.3B12.3B.B4.BA5.AB4.B.3B$4.BAB16.3B2.2B.3B.2B
2.3B$4.3B16.BAB5.BAB5.BAB$7.3B13.3B2.2B.3B.2B2.3B$7.BAB9.3B.B4.BA5.AB
4.B.3B$7.3B9.BAB6.2BAB.BA2B6.BAB$11.3B5.3B7.3B.3B7.3B$9.2B.AB$9.BA.2B
7.3B17.3B$9.3B9.BAB7.3B7.BAB$21.3B7.BAB7.3B$24.3B3.5B3.3B$24.BAB11.BA
B$24.3B.3B3.3B.3B$28.BAB3.BAB$28.3B3.3B!

EDIT 2: Apparently the D8_1 census had reached beyond the milestone of 60 million objects.

ConwayLife.com

Stopbox

Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox

Re: Stopbox