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I found an orthogonal period 3 pushalong. Too bad no period 3 spaceship has a leading or sufficiently isolated side spark.

x = 7, y = 5, rule = B3/S23
2bo$bobo$o3bo$b2obo$6bo!

A for awesome wrote:7-cell, 3x5 methuselah lasts 1675 gens.

Code: Select all

x = 5, y = 3, rule = B3/S23
2b2o$bobo$2o2bo!

Neat! I've found a multitude of 8 and 9 cell predecessors to this particular pattern but not this 7 cell one.

4 pre-boats eat a line of cells. It is extendable.
x = 7, y = 9, rule = B3/S23
b2ob2o$obobobo$o5bo2$b5o2$o5bo$obobobo$b2ob2o!

@c0p0b0 I'm not sure how subtracting the travel time of a triggering spaceship is "complex" in the same manner as the mathematical sieves previously presented, perhaps we are working with different definitions of complex?

Yes, I think that the name you suggested for the "Diehard" would be more ...

@NotAvailableCooper: The clause you mentioned was suggested before by ssaamm.
Well, a Methuselah is defined by, essentially, the size of the original pattern versus the size of the reaction it creates, right?
You are thinking in terms of bounding boxes, which he considered to be outdated, while ...

Modified Pipsquirter 2 extends Pentoad reaction by 2 generations with sparks.

x = 31, y = 36, rule = B3/S23
23bo2bo2bo$20bo2b7o$20b3o$24bob2o$22b3o3bo$21bo4bobo$20bob2obo2b2o$20b
obo3bobo$19b2o2bob2obo$21bobo4bobo$21bobobobob2o$20b2obobobo$9b2o11bo
4bo$5b2obobo11bobob2ob2o$5b2obobob2o7b2obo3bobo ...

Phi spark moves a block over two spaces as it dissipates. Kinda fun to watch.

x = 6, y = 9, rule = B3/S23
3bo$2b3o$bobobo$bobobo$2b3o$3bo2$2o$2o!

So I was messing about with smoke recently when I found this reaction, which when supplied with the sparks shown will reappear after 11 generations flipped over. Anyone know of a p11/p22 diagonal sparker?

The pattern:
x = 11, y = 9, rule = B3/S23
3bo$5b2o$4bo2bo2bo$3b6o$o2b2ob2o2bo$2b6o$o2bo2bo ...

A more obscure topic, I know, but I didn't see any pages devoted to them. Here are a few I have found while dabbling in 8 and 9 cell patterns:

8 cell:
x = 7, y = 5, rule = B3/S23
2bo$2b2obo$o5bo$o4bo!

9 cell:
x = 4, y = 15, rule = B3/S23
3o9$3bo$3bo$3bo$bo$2bo$bo!

x = 7, y = 9, rule = B3/S23
bo ...

Hi! I'm a guy who's been playing around with GoL for 5 years and is particularly fascinated with methuselahs. I'm no expert, but I know enough to have made a video series on the basics on YouTube.

I think a methuselah is any pattern that lasts more than 1000 gens before becoming periodic, and has a population that does not keep increasing forever. Therefore a pattern that creates a switch engine does not count.
This definition I can agree with myself. There is something about interacting ...

I myself am making a tutorial series on GoL and would like to invite anyone who wants to participate in a discussion of a GoL topic, a showcase of personal discoveries or similar to contact me via my YouTube channel. The link is the first episode.
https://www.youtube.com/watch?v=EOKaLl4EoL0&list ...