I came back to this rule and found a p28 snowflake hassler fairly quickly.
Code: Select all
x = 17, y = 17, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
10bo$10bo$8bo$4b2o2b2o$13bo$8bo4bo$2o6bo$3bo2bo$2b2o9b2o$7bo5bo$6b3o6b
2o$3bo3bo$3bo$7b2o2b2o$8bo$6bo$6bo!
There's probably a bunch of interesting stuff left in this rule—although not necessarily more interesting compared to alternative rules that one could search.
Edit: Indeed, here is a p37 oscillator:
Code: Select all
x = 22, y = 13, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
7bo6bo$7b3o2b3o$9bo2bo2$b2o5bo4bo$2bo18bo$o8b4o8bo$o18bo$8bo4bo5b2o2$
9bo2bo$7b3o2b3o$7bo6bo!
The engine can yield oscillators with other periods, such as this p25:
Code: Select all
x = 22, y = 13, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
7bo6bo$7b3o2b3o$9bo2bo$2o$2o$9bo2bo$9bo2bo$9bo2bo$20b2o$20b2o$9bo2bo$
7b3o2b3o$7bo6bo!
The p25 can support this p50 with the same engine:
Code: Select all
x = 52, y = 47, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
8b2o32b2o$8b2o32b2o3$6bo38bo$4b5o34b5o$2bobobobobo31b2obob2o$2ob3ob3o
b2o26b2ob3ob3ob2o$bo2bobobo2bo28bo2bobobo2bo$b2ob5ob2o28b2obo3bob2o$3b
o5bo32bo2bo2bo$3bo5bo32bo2bo2bo$b2ob5ob2o28b2obo3bob2o$bo2bobobo2bo28b
o2bobobo2bo$2ob3ob3ob2o26b2ob3ob3ob2o$2bobobobobo5bo18bo6b2obob2o$4b5o
7bo18bo7b5o$6bo11bo3bo6bo3bo11bo$17b2o3b3o2b3o3b2o$16bo7bo2bo7bo$3b2o
12bo2bo10bo2bo12b2o$3b2o5bo6b3o12b3o6bo5b2o$9bobo2b2o8bo2bo8b2o2bobo$
6b2obob2ob3o7bo2bo7b3ob2obob2o$9bobo2b2o8bo2bo8b2o2bobo$3b2o5bo6b3o12b
3o6bo5b2o$3b2o12bo2bo10bo2bo12b2o$16bo7bo2bo7bo$17b2o3b3o2b3o3b2o$6bo
11bo3bo6bo3bo11bo$4b5o7bo18bo7b5o$3b2obob2o6bo18bo5bobobobobo$2ob3ob3o
b2o26b2ob3ob3ob2o$bo2bobobo2bo28bo2bobobo2bo$b2obo3bob2o28b2ob5ob2o$3b
o2bo2bo32bo5bo$3bo2bo2bo32bo5bo$b2obo3bob2o28b2ob5ob2o$bo2bobobo2bo28b
o2bobobo2bo$2ob3ob3ob2o26b2ob3ob3ob2o$3b2obob2o31bobobobobo$4b5o34b5o
$6bo38bo3$8b2o32b2o$8b2o32b2o!
Here is a p77 sparker with the same engine:
Code: Select all
x = 44, y = 21, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
4b2o3b2o$4b2o3b2o$7bo$6b3o$b2o15bo6bo$b2o15b3o2b3o$20bo2bo14b2o2$6b3o
27b2o$2o10b2o6bo2bo6bob2o2b2o2b2o$3bo6b2obo6bo2bo6bob2o6bo$2b2o2b2o2b
2obo6bo2bo6b2o10b2o$6b2o27b3o2$4b2o14bo2bo$18b3o2b3o15b2o$18bo6bo15b2o
$35b3o$36bo$33b2o3b2o$33b2o3b2o!
Lastly, here is a p15 with a similar engine:
Code: Select all
x = 18, y = 13, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
11bo$9b3o$2o7bo$2o13b2o$13bo2bo$6bo2bo6b2o$6bo2bo$6bo2bo2$14b2o$2o4bo
7b2o$2o2b3o$4bo!
Either symmetric version also works.
Second edit: Here is a p51 (octuple) T factory whose engine converges to a later stage of the first engine.
Code: Select all
x = 48, y = 48, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
11b2o22b2o5$20bo6bo$20b3o2b3o$7b2o13bo2bo13b2o$7b2o30b2o$10bo26bo$9b2o
9bo6bo9b2o$o18b3o4b3o18bo$o19bo6bo19bo3$22bo2bo$20b3o2b3o$20bo6bo2$11b
o24bo$5b2o3b3o3b2o12b2o3b3o3b2o$6bo4bo4bo14bo4bo4bo$6b2o7b2o14b2o7b2o
3$6b2o7b2o14b2o7b2o$6bo4bo4bo14bo4bo4bo$5b2o3b3o3b2o12b2o3b3o3b2o$11b
o24bo2$20bo6bo$20b3o2b3o$22bo2bo3$o19bo6bo19bo$o18b3o4b3o18bo$9b2o9bo
6bo9b2o$10bo26bo$7b2o30b2o$7b2o13bo2bo13b2o$20b3o2b3o$20bo6bo5$11b2o22b
2o!
Monomerization unfortunately does not look likely.
Third edit: Here is a p21 oscillator with a completely different engine.
Code: Select all
x = 20, y = 13, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
7b2o$10bo$3bo5b2o5bo$b3o12b3o$bo16bo$5bo3b2o3bo$2ob4o2b2o2b4ob2o$5bo3b
2o3bo$bo16bo$b3o12b3o$3bo5b2o5bo$9bo$11b2o!
Fourth edit: Here is a p19 oscillator.
Code: Select all
x = 21, y = 10, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
17bo$3bo13b3o$b3o15bo$bo15bo$3bo12b5o$5o12bo$3bo15bo$bo15b3o$b3o13bo$
3bo!
Fifth edit: Here is a p11 oscillator.
Code: Select all
x = 17, y = 17, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
7bo$7b3o$9bo4$7bobo$b2o3bo3bo4b2o$bo13bo$2o4bo3bo3b2o$7bobo4$7bo$7b3o
$9bo!
Sixth edit: Here is a p49 oscillator.
Code: Select all
x = 16, y = 8, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
2o$2o$3bo$2b3o$3bo$2o$2o12b2o$14b2o!
Seventh edit: Here is a p22 snowflake factory (turned into a sparker here).
Code: Select all
x = 14, y = 12, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$4bo$3b3o2bo$4bo2b3o$2o5b3o$2o6bo4bo$13bo$11bo$11b2o!
The snowflake can be destroyed in a way that makes sparks that rephases the part that creates it to p32.
Code: Select all
x = 13, y = 16, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$3b2o$2b3o$3b2o$2o$2o4$11b2o$7bo3b2o$7b3o$9bo!
Eighth edit: Two copies of the snowflake factory engine (and some blocks) make a p56 oscillator.
Code: Select all
x = 15, y = 24, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$3bo2bo$3bo2bo$3bo2bo$2o$2o$12b2o$3b2o7b2o$3b2o$10b
2o$10b2o2$13b2o$13b2o$8bo2bo$8bo2bo$8bo2bo$13b2o$6b2o5b2o$7bo$4b2o!
Also, a Z-pentomino can rephase the period of a single engine to 23.
Code: Select all
x = 14, y = 9, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$3bo$2b3o7b2o$3bo8bo$2o9b2o$2o!
Ninth edit: A Z-pentomino in a different place changes the period to 28.
Code: Select all
x = 11, y = 15, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$4bo$2bob2o$4bo$2o$2o4$9bo$7b3o$7bo!
Also, two blocks placed in the proper way double the period of the p22 snowflake factory to 44.
Code: Select all
x = 13, y = 13, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$4b2o$4b2o$4b2o$2o$2o3$5bo6bo$5b2o4b2o!
Alternatively, we can use two copies of the engine.
Code: Select all
x = 20, y = 21, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$3bo$2b3o$3bo$2o$2o2$7b2o2b2o2$18b2o$18b2o$16bo$15b
3o$16bo$18b2o$11b2o5b2o$12bo$9b2o!
Furthermore, there is a period-tripling reaction to p66.
Code: Select all
x = 12, y = 13, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$4bo$2bob2o$4bo$2o$2o3$4b2o4b2o$4b2o4b2o!
Lastly, I found an interesting (albeit not ostensibly useful) transparent reaction.
Code: Select all
x = 18, y = 22, rule = B2ci3aik4c5ry6a7e/S1e2aei3-cnry4eiyz5aeir6ei8
9b2o$7bo$2o5b2o$2o$4bo$2bob2o$4bo$2o$2o2$7bo2bo$7bo2bo2$16b2o$16b2o$13b
o$12b2obo$13bo$16b2o$9b2o5b2o$10bo$7b2o!
I am tentatively considering myself back.