After a bit of transition-tailoring, I've found this rule: B2-m3-o/S2m3-p4-m5H
It doesn't have stable ash, but it does have p2 ash, so this is fine.
It has a lot less activity than CGoL, but it does contain some chaotic patterns that can persist for quite a long time (compared to everything else).
Examples:
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x = 32, y = 32, rule = B2-m3-o/S2m3-p4-m5H
2obo2b4o3bo3bo3b8ob2o$2bob3o3b10obobo5bo$4b2o2b3o4b3o4bo3b3o2bo$2bob2o
bo2bobob2obo2b7obobo$2o2bob3obobo3b2o3b2o2bobo$bob3ob3o3bo2b2o3bo3b3o
2b2o$3obo2b4ob3o2bo2b2ob3ob5o$b2obo2b6o2b3o2bo3b3obo2bo$bobob10obobo7b
3o$2ob2o2b3o2bo3b2obob5ob3o$3ob2o2bo2bo2bob3obo4bob4o$bob2ob5o2b2obob
2o5b2ob2o$o10bobob4obo2bo4bo$4b2ob2o2b3o5b3o2bo2b2o2bo$3o2b5o3b2obo2b
2ob2obobo$ob2o2bobob2obo6b2obobo2bob2o$2bo4bobo2bo5bo2bo5bobobo$b2o2bo
bo3b2obo7b2o3bob3o$bo2bo2b2o2bo2bobob2o7bobo$bobo3b2o2b2obobob2o2bob4o
bo$obobo2bobo3bo3bobo2b2obo3bo$b2obobob3obobo3bobobobo2bo2bo$5b2o2b2o
2b2ob2o5b2o6bo$4bo2bo4bobo4bo8bo2bo$2ob3o2bobob2o5bo4b2obo$obo2bob3obo
b2o6b9o$bobo2b3o2bobo3b4o3bo2bob3o$3bo2b2obob6o2bo4b2o2bobo$2o2bo2bobo
b3obob3ob2o3bob4o$b2o4bob5o3b3o3bo4b4o$o3bob3o4b2o2b2ob3o2b4ob2o$2o2bo
b7obob2o2bo2bobo3bobo!
Code: Select all
x = 32, y = 32, rule = B2-m3-o/S2m3-p4-m5H
b2obobo5b3o2b2o5bobo3b2o$bo2b5o2bobo2b3obob2obob2obo$ob3o3b3o2b2o3b2ob
o2b2o2bobo$b3o5bobobob3o3b2obobo2bo$bo2bo2b2obobob4o2bob3ob3ob2o$b2obo
4bob3obobo2b2ob3o3bo$3bo5bob2obob2o4bob2o3bo$2b2ob3ob3o4bo2b3o4bo2b2o$
ob4o2bo4bo3bo5b4o4bo$2bo5bobob2obob3o2b2ob4o2bo$3obo3bo4b2ob3o3bob5o2b
o$bo2b2o3bobo3bobobo2bobo2b2obo$obo3b2ob3ob2o3bobo2bo2bo2b2o$2obo2b2o
8b2obo2bo2b2o2b3o$obobob2ob4o2b2ob8ob2obo$4b2o3bo2bo2bo3b2o2b2ob2ob3o$
bo2bo3bob2o2b2o2bobo2bob4o$2bo4bo3b3o2b4o2b2o3bo2b2o$o2bo5b3ob2obo3bo
5bo4bo$2ob2ob2o6bob3obobo3bo3b2o$3obob2ob3o2b2o2b2o3bo5bobo$2ob2o2b2o
4b2o2b2obo4bo2bob2o$2o4bo2b7o3b3o2b4o$5b2o2b2o6bo2bob2ob7o$o2b2obobob
2obobob3o2bo2b5obo$b2obo2bobob4o2b2ob2o2b4obobo$4bo3b6obo3b3o4bobo2bo$
o2b2o6b4ob2o2b2obo2b4obo$o2b3o3bo4b5ob3ob2obobobo$3bobob2obob2obob2o2b
2obo5bo$3bobob2o2b2o2b2o2bo2bobobob2obo$bo2b2o3bo2bob5o2bo5bobo!
Glider reflections:
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x = 598, y = 34, rule = B2-m3-o/S2m3-p4-m5H
302bo89bo$303bo89bo$202bo100bo89bo$94bo108bo99bo89bo$o94bo107bo99bo89b
o$bo93bo107bo277bo91bo$bo93bo107bo278bo91bo$bo93bo386bo91bo$bo480bo91b
o$482bo91bo15$356b3o82b3o$355b2o83b2o151b3o$358b2o83b2o151b2o$258b3o
333b2o$257b2o$152b3o105b2o265b3o$55b2o94b2o373b2o$55bo98b2o373b2o$55bo
$55bo!
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x = 508, y = 32, rule = B2-m3-o/S2m3-p4-m5H
o$bo$bo134bo$bo135bo$bo135bo179bo$137bo180bo$137bo180bo149bo$318bo150b
o$318bo150bo$469bo$469bo10$12b4o$16bo2$14bo3$190b4o$190bo161b3o$351b2o
$354b2o148b3o$503b2o$506b2o!
I've not tried to search sparky oscillators or other things. I feel like if these things are found, the rule will be turing-complete.
Is anyone interested in exploring that rule or close relatives? Looks like B2o3-o/S2m part is responsible for a glider, and S3m4p5 part is responsible for keeping structures active for a longer time.