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Pyry Virtanen

The C1 sample soup collection of the messless_10h bin in Catagolue reached its maximum limit a couple months ago. I have looked through the 499 soups (one is missing for some reason) and found that nine of them evolve to the following diehard pattern that lasts 995 ticks, or a close variation of it:...

Pyry Virtanen

A new record 12-cell diehard, it lasts 515 ticks:

Code: Select all

x = 11, y = 8, rule = B3/S23
8b3o$10bo$3bo$5bo$4bo$4bo$3bo$3o!

Edit: Nevermind, here is an even better 12-cell diehard. It lasts 541 ticks:

Code: Select all

x = 20, y = 4, rule = B3/S23
19bo$bo9bo6bo$obo8b2o5bo$bo16b2o!

Pyry Virtanen

Started a wiki page , in User namespace for now. Here are two more diehards that I think should be on that list: 9x10 that lasts 1118 ticks. It's an easy variation of the 7x11 diehard: x = 10, y = 9, rule = B3/S23 o$o$o4bo$4bobo$3bob2o$4obo3bo$5bo3bo$2o6b2o$bo! 9x12 that lasts 1143 ticks: x = 12, y...

Pyry Virtanen

Here is a 7x11 diehard that lasts 1119 ticks. It is an improved version of an older 8x11 form.

Code: Select all

x = 11, y = 7, rule = B3/S23
3o$5b2o$7bo$6bo$2ob4o3bo$2bobo5bo$3obo2bob2o!

Pyry Virtanen

Here's a stamp collection of my best diehards for most square sizes up to 31x31. Maybe someone will find it useful, either for some of the components or just as a goal to beat. I had some larger ones in the collection, but Moebius's recent 32x32 with a lifetime of 1120271 makes those obsolete. Prob...

Pyry Virtanen

Is Engineered diehards counts? It's true that pretty much every engineered diehard satisfies my bounding box criterion, but they tend to be relatively large. I try to focus on smaller diehards, let's say patterns with 30 cells or less, or alternatively patterns with bounding box areas 100 or less a...

Pyry Virtanen

I guess you won’t be counting things like a glider hitting an arbitrarily distant blinker? I set a bounding box restriction in the first post of this thread to avoid things like that. An N-cell diehard must fit into a 2Nx2N bounding box. I think this is generous enough but it rules out the glider +...

Pyry Virtanen

A new 8-cell record diehard, it lasts 176 ticks:

Code: Select all

x = 8, y = 4, rule = B3/S23
5bo$2bo2b2o$obo4bo$2bo!

It is based on a soup. It would be very doable to find the longest-lasting diehards with population counts 10 and below with a brute force search, but I don't have resources to do that.

Pyry Virtanen

I was able to improve the record 17-cell diehard by 10 ticks by using a more distant century predecessor. I also replaced the boat with a predecessor to decrease the pattern's bounding box area. Its lifespan is now 1247 ticks. x = 25, y = 27, rule = B3/S23 8bo$8bo$8bo15$o$o20bo$obo18bo$o20bo$23b2o$2...

Pyry Virtanen

Here are seven diehards with small bounding boxes that I have discovered. I have already posted most of them in other threads, but I decided to put them here too so that they can all be in the same place. The third one is new. These are the longest-lasting diehards for their bounding boxes I know ab...

Pyry Virtanen

I suggest that the list of SKOPs on the Oscillator wiki page could be expanded to include all periods from 1 to 200. Period 1 is currently missing and there are a lot of gaps after p120. Also the p136 entry is incorrect, it should be figure eight on p68 century hassler with 50 cells. The p79 entry a...

Pyry Virtanen

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Pyry Virtanen

There has been some talk about making a list of the best known small diehards, but no-one has actually posted such a list, so I'm doing it here. I don't think there's a List of Record-Breaking Diehards on the wiki yet, but there's no harm in putting together a trial version and seeing if it gets con...

Pyry Virtanen

Here is a 7x8 diehard that lasts 1001 generations, based on a recent soup. It is a predecessor of another diehard (generation 6) that has now occured six times in C1. x = 8, y = 7, rule = B3/S23 o6bo$o4b3o$obo4bo$o4bobo$o6bo$obo2b2o$bo3bo! Edit: I removed an unnecessary cell at (1, 2). And here is a...

Pyry Virtanen

Recently I have thought about the following question: Which periodic objects don't have any predecessors with a smaller or equal population other than themselves (even more distant predecessors)? At least blinker, tub and clock are like this, and probably snake as well. But are there any others? May...

Pyry Virtanen

Here is a 6x7 diehard that lasts 571 ticks: x = 7, y = 6, rule = B3/S23 obo2b2o$3o$ob2o2bo$2b3obo$2b2obo$5bo! It is a predecessor of a known diehard pattern that has occured naturally multiple times. Generation 24 seems to be the common bottleneck. I was able to get surprisingly far in optimizing it...

Pyry Virtanen

I found this 416-tick diehard consisting of a loaf and a two-glider octomino: x = 9, y = 12, rule = B3/S23 b2o$o2bo$bobo$2bo5$6bo$5b3o$7b2o$7b2o! By choosing the right predecessors you can have this 11-cell form that lasts 419 ticks: x = 8, y = 13, rule = B3/S23 3o$2bo$2bo5$6bo$6bo$6bo$6bo$6bo$7bo!

Pyry Virtanen

Here is a 5x6 diehard that lasts 269 ticks. It beats my previous record of 6x6 (or smaller) diehards by 15 ticks. x = 6, y = 5, rule = B3/S23 b2o$2o$4o$b2obo$3b3o! I also found a 10-cell polyplet predecessor for it, lasting 270 ticks: x = 5, y = 7, rule = B3/S23 2bo$bo$bo$b3o$o3bo$4bo$4bo! Imo that'...

Pyry Virtanen

I have now finally looked through all C1 diehard soups in Catagolue that last between 1000 and 1099 ticks. There are currently 415 of them. I have already analyzed and written posts about the higher bins. I found four different long lasting diehard patterns that each occured multiple times among tho...

Pyry Virtanen

Here is an 11-cell diehard in a 10x11 bounding box with a lifespan of exactly 300.

Code: Select all

x = 11, y = 10, rule = B3/S23
10bo$10bo$10bo4$o$o4bo$2obobo$5bo!

Pyry Virtanen

Here is a 3x14 diehard with 17 cells that lasts 997 ticks:

Code: Select all

x = 14, y = 3, rule = B3/S23
3o6bob2o$2b2o2bo4bobo$2bob2o2b3o!

It is a grandparent of a form I found in a C1 soup.

Pyry Virtanen

While looking through a bunch of messless_10h soups, I found this 9x10 diehard with 20 cells that lasts 1069 ticks: x = 10, y = 9, rule = B3/S23 2bo3b2o$2bo2bobo$obo2bo$bo3b2obo2$7b3o$8bo2$7b3o! Edit: I found a 9x9 version of this, it has 31 cells and lasts 1068 ticks: x = 9, y = 9, rule = B3/S23 o3...

Pyry Virtanen

I tried to find a minimal bounding box version of a 7x19 diehard I posted here earlier and came up with this 6x16 pattern. It lasts 1071 ticks before vanishing and has 28 cells. x = 16, y = 6, rule = B3/S23 6b4o5bo$2o10bo2bo$8bobo2b3o$obo2bobo7bo$2o2bo10bo$3b4o6bo! I don't know if it can be further ...

Pyry Virtanen

There was also another common pattern among the 90 diehard soups in C1 that last 1100+ ticks. Four of them evolve into the following pattern that lasts 1089 ticks: x = 14, y = 14, rule = B3/S23 3b3o2$7bo$7bo$7bo$2b2o$bobo$o$o2bo$o$bo$2bo3bo$3b3o6b2o$12b2o! In all four of the soups, the two blinkers ...

Pyry Virtanen

I have now looked through every C1 diehard in Catagolue that lasts 1100+ ticks (currently 90 of them in total). I noticed six of them evolve into the same sequence that lasts 1065 ticks, which is the generation 3 of a diehard I posted in this thread on 11th August 2022. Here are the soups: C1 messle...

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