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2c/7o partial
x = 29, y = 44, rule = B2cek/S1e2ak
3$4bo2bo4bobobo4bo2bo$3bo4bo11bo4bo$6bo6b3o6bo$5bobo6bo6bobo$10bo7bo$
7b2o5bo5b2o$12bo3bo$7bo13bo2$7bob2o7b2obo$11bo5bo$3bobo2bo11bo2bobo$3b
2obo15bob2o$2bobo2bo13bo2bobo$3bo21bo$2bo4bo13bo4bo$bo5bo13bo5bo$3bobo
17bobo$bobo2bo15bo2bobo2 ...

Level 6 c/7 partials but ima stop it for c/8 as the lowest level for c/7 is level 3
x = 58, y = 45, rule = B2cek/S1e2ak
5$17bo30bo2$15bo3bo26bo2bo$46bo2bo$16b3o27bo$13bob5obo24bo$12bo9bo24bo
bo2bo$12b2ob5ob2o30bo$10b2o11b2o23bo$17bo$12bo9bo25bo2bo$8b2o7bo7b2o
19b2o$13bo7bo$13bo3bo3bo24bo2bo ...

Wow the c/5 is weird. Doesn't look as veiny as the rest, especially with the margolus.

newer c/8 partials
x = 32, y = 32, rule = B2cek/S1e2ak
13bo$14bo$12bobo$13bo$15b2o$12bo$14bo5bo$13bobo$15bobobo$17bobo$
17bo2b2ob2o$18b2o$2bo2bo15bo$o2bo3bo17bo$b2o3bo14bo4bo$4bo2b2o13bo
$4bo22bo$8b3o17bo ...

Nice Ninedlingss it beats the old c/5 record by 284 cells lol
New d/8 partials
x = 50, y = 47, rule = B2cek/S1e2ak
11bobo$11bobo$9b2o2bo$13bo$9b4o$12b2o2bo$4bo$4bo$4bo9bo$13bo2bo4bo
$3o17bo$4b3o5bo3bo2bo$7b3o5bo5bo$6bo5bo3bo5bo$8b7o7bo$7bo6bo4bobo$
13b3o$11bo12b2o$11bo6bob2o5bo$14bo4bo3b4ob3o ...

Tempted to make the B2cek/S1e2ak rule its on forum:
It has c/2o-c/6o discovered so far and c/4d to ?


I feel like it's not worth it, mainly due to the lack of any common spaceships making it hard to construct most circuitry. Are there any level 7 rules one step from it that have common ...

Tempted to make the B2cek/S1e2ak rule its on forum:
It has c/2o-c/6o discovered so far and c/4d to ?

Here are c/8d partials:
x = 217, y = 159, rule = B2cek/S1e2ak
$150bo2$150bo$150b2o$146bobo2bo2$151bo2bo2$143bo10bo$142bobo7bo$142bo$
140b3o9bo$139bo10bo$140bo2bobo2bobobo3bo$144bo4bo$148b4o2 ...

10c/72o in B2ce/S1 might not be that far-fetched.

x = 5, y = 555, rule = B2ce/S1
bobo$bobo$2bo$2bo$2ob2o2$2ob2o$2bo$2bo$2ob2o2$2ob2o$2bo$2bo$bobo$bobo
5$bobo$bobo$2bo$2bo$2ob2o2$2ob2o$2bo$2bo$2ob2o2$2ob2o$2bo$2bo$bobo$bob
o25$bobo$bobo$2bo$2bo$2ob2o2$2ob2o$2bo$2bo$2ob2o2$2ob2o$2bo$2bo$bobo$b ...

For some reason no one from this forum or that forum has found a low level c/6 yet


Ahem?
x = 13, y = 25, rule = B2cek/S1e2akHistory
8.A$6.2A$9.A2$4.2A.A$8.A2.A$8.A2.A2$6.A2.2A.A$6.A2.A$5.A$6.A2$6.A$3.A
$.A3.A$2.3A$2A2.A.A$4.A$2.A.A3$4.A2.A$6.A2.A$5.A.2A!



Sweet lol you found a smaller c ...

level 6 (2,1)c/8 partial
x = 21, y = 32, rule = B2cek/S1e2ak
4$11bo$10bo2$10bo$9bo$9bo$8bo2bo$8bo2bo$4bo4bo2bo$4bo2b2o$4bobo$8bo$4b
o2bo$4bo$9bo$5bo5bo$4bobo2bo$5bo3bobo$7bobo$6bobo3bo$6bo5b3o$6bo2bo2bo
2$7bobo2bobobo$4bob3o2b5o!

That rule I like. For some reason no one from this forum or that ...

I've been starting a spreadsheet of spaceship speeds and their lowest level. Here are some:
[...]


I found an old thread that collects them:
https://conwaylife.com/forums/viewtopic.php?p=91501#p91501


Thanks! Here is the spreadsheet Ive been working on: https://docs.google.com/spreadsheets/d ...

Level 4 cool xp8 oscillator, ima try variations of rules like that.
x = 4, y = 4, rule = B2ce/S1e2k
obo$2bo$bo$bobo!
Level 6 ship
x = 4, y = 5, rule = B2cek/S1e2ak
3bo$b3o$o2bo$b3o$3bo!

Level 5 xp14
x = 5, y = 5, rule = B2cek/S1e2k
o3bo$o3bo2$o3bo$o3bo!

And obviously the level 2 b2k pinwheel ...

I like this level 7 rule alot:
x = 2, y = 4, rule = B2cek3ij/S1
2o$bo$o$bo!

I'ma apgsearch it

I knew it was cool!

6c/40o
x = 12, y = 5, rule = B2cek3ij/S1
2b2o$bobo2b2o3bo$o2bo7bo$bobo2b2o3bo$2b2o!

6c/27o
x = 11, y = 8, rule = B2cek3ij/S1
3$3bobobo$2bo5bo$2bo5bo$4bobo!

12c/54o
x = 7, y ...

I've been starting a spreadsheet of spaceship speeds and their lowest level. Here are some:
2c/6o: Level 5 (3) x = 2, y = 3, rule = B2ce3n/S1
2o2$bo!

1c/10o: Level 6 (7) x = 2, y = 7, rule = B2ce3i/S12k
o$o$o$bo$o$o$o!
1c/11o: Level 6 (7) x = 11, y = 5, rule = B2ce3i4t/S02c
o9bo$2bo2bo2bo2$5bo ...

level 3 b2a rule has interesting ships:
x = 32, y = 13, rule = B2ae/S1c
2$28b2o$27bo$2b2o3b2o11b2o4bo$4bobo18bo$2bobobobo15bo2bo$23bo$25bo!


level 8 diagonal ship:
x = 5, y = 5, rule = B2cek3ir/S1e2a
obo$o$bo2bo$2bo$3b2o!
Also some cool level 7-8 oscillators in that rule.

level 6 4o/12c and ...

melwin22 wrote: October 13th, 2026, 12:54 pm This level 3 rule was mentioned on the forums a few times, but not yet in this thread.

A small rake that emits a replicator and diagonal streams of ships

Nice rule, three types of spaceships which is cool, also you can delete the replicator to just get the rake.

Level 5 spacefiller from Heav
x = 12, y = 11, rule = B2ae3er/S1e
10bo$3b2o6bo$3b2o3bo2bo$2obo4bobo$2o3b2obobo$2o6bo2bo$3bo2bo4bo$4b2o4b
o$11bo$11bo$10bo!

Stuff from that rule (All three oscillators listed are actually smaller level compounds. x = 248, y = 274, rule = B2ae3er/S1e
16$234bo$233bobo ...

Small Level 5 spaceship: This rule has two similar ships

List of the stuff in this level 5 rule: https://catagolue.hatsya.com/census/b2ces01/C1
x = 700, y = 115, rule = B2ce/S01
25$370bo47b2o$370bo12b11o23bo59b6o21bo13bo$333b8o15bo12b2o9b3o33bo42b
5o12bo4bo22bo13b2o31bo12b7o$341b2o13bo12b2o9bo34bo44bo3b2o8b2o4b2o22bo
14b4o28bo19bo ...

LuveelVoom wrote: October 10th, 2026, 4:34 pm

Hunter wrote: October 10th, 2026, 4:23 pm I think it would be cool if we start listing the minimum level for spaceships speeds, like 5s but instead of smallest spaceships its the smallest level.

"Level" refers here to "Number of transitions in rulestring"?

Yes

This rule has common 5 cell lines:


Forget about that. That level 8 rule has a c/6d ship!

x = 2, y = 5, rule = B2ce3a/S12i3a
2o2$bo2$bo!

I think it would be cool if we start listing the minimum level for spaceships speeds, like 5s but instead of smallest spaceships its the smallest level ...

Been trying random ideas. Here's a level 4 2c/4o
x = 4, y = 3, rule = B2e3i/S1e2k
4o2$o!

From a rule with a hive replicator.
Making oscillators out of this rule is easy:
x = 4, y = 6, rule = B2e3i/S1e2k
b2o3$4o2$b2o!

Different rule has a cool level 4 xp5, Looks like a sun:
x = 3, y = 3, rule ...

If I understand correctly, this would be Level 4, since S1 = S1ce:

x = 64, y = 64, rule = B2ce/S1
b6ob3obobo2bob2o4b2ob5ob3ob3o2bob2ob4obobobobo2b2o$3o2bo2bob2ob2o3b3o
2b3o2b7o3bo2bobobob2ob4ob2ob5o$2o4bo2bob2ob3o4b2obo2bo5bo2bobob2obob2o
bo3bobo$2ob3obob4o3b2obo2b2o2bo2b2o5bob4o3bo4bo3b2o2bob2o ...

Amazing ship FWKnightship, is that the only different level 2 speed known? Really cool to look at also.
On the topic of space invaders here's a cool level 3 rule mentioned by ThePlayzr which turns out has a lot of stuff. Three natural spaceships, and alot of puffers, even a rake.
x = 308, y = 489 ...

If I understand this correctly, this...
x = 0, y = 0, rule = B2-a/S2-k
!
#C [[ RANDOMIZE2 ]]
would be a "Level 2" compound, but this...

x = 0, y = 0, rule = B2-a/S12-k
!
#C [[ RANDOMIZE2 ]]
would not count, because one condition is not followed by a letter.


You have the idea right, though ...

List of lvl 2 to lvl 3 compounds.
- Level 2 -
Block Blinker:
x = 3, y = 3, rule = B0/S
$bo!
Dot:
x = 3, y = 3, rule = B/S0
$bo!
stable douplet:
x = 2, y = 2, rule = B/S1c
o$bo!

Stable domino:

x = 5, y = 7, rule = B/S1e
4$2bo$2bo!

Length 2-b2c Margolus:
x = 1, y = 3, rule = B2c/S
o2$o ...