ConwayLife.com

I wonder, if one can build a spaceship out of blockic seeds and fast salvos like following: 2G+B->2G+B x = 212, y = 12, rule = B3/S23 2o98b2o98b2o$2o98b2o98b2o$6b2o98b2o$6bobo97bobo97b2o$6bo99bo99bobo$ 206bo2$4b2o124b2o$4bobo123bobo$4bo125bo79b2o$209b2o$211bo! 2G+B->2G+2B x = 17, y = 13, rule = B3/S...

dvgrn wrote:

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gencols -pat glsplit/g4c.col obj/block.life -tc 10 100 -gen 512 -filt a -leq 25 -geq 25 > glsplit/result_4blocks.col

I think if you had used "-filt ag" then you could also get codirectional gliders without much additional time.

Here you are:

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x = 12, y = 14, rule = B3/S23
2o$2o4b2o$6bobo$6bo4$5b2o$5bobo$5bo2$9b3o$9bo$10bo!

Is any additional junk allowed?

EDIT: Any restriction on the duration of the reaction?

Diagonally in which direction relative to the salvo?

A simple predecessor of house bridge boat (found in symmetrical soup).

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x = 22, y = 8, rule = B3/S23
bo18bo$2bo16bo$2o18b2o$o20bo2$2b2ob2o8b2ob2o$2bo3bo8bo3bo$3b3o10b3o!

The reason why those particular gencols searches didn't find the 5th 3:3 and the 3:4 is that collision with the 3rd block happens after the 80th generation.

I'm just using "-filt a -leq 15 -geq 15" in the batch file, instead of "-filt a -leq 10 -geq 10". So this "not_shown" message may be a sign that I'm doing something wrong with the parameters and leaving out lots of results, but I haven't figured out yet what the problem could be. That confusing "no...

Having said that, I realized, that I missed a large class of ouputs, namely gliders on parallel tracks. I'm correcting myself now. Sorry the list is unsorted and may contain duplicate collisions or patterns where a glider could not come from infinity. x = 257, y = 917, rule = B3/S23 10b2o71b2o77bo74...

The script will be embarrassingly inefficient and will take hours to run if there are many megabytes of output, but I have a spare computer and lots of spare curiosity...! What exactly are you calling gencols with for this search? This is the script I used for finding G+3blocks->2G collisions ./gen...

So... are there no G->3G reactions from 3-block constellations, according to gencols? Well, I thought about that, but it would be quite tricky to find this out without modifying gencols' code, because it cannot filter by objects, if the pattern consists of several of them. For finding those G->2G r...

3-block glider duplicator seeds. x = 214, y = 127, rule = B3/S23 159b2o$159b2o6$108b2o$108b2o2$205b2o$205b2o2$3b2o4bo49bo49bo49bo49bo$ 3b2o4bobo47bobo47bobo47bobo47bobo$9b2o48b2o48b2o48b2o48b2o$53b2o48b2o 48b2o48b2o$53b2o48b2o48b2o48b2o2$2o$2o$56b2o102b2o$56b2o2b2o98b2o$60b 2o51b2o$113b2o2$206b2o$20...

Of course, you can do that. But my idea was to use only forward gliders to support the reaction from behind , if you want to build a spaceship. Unfortunately I could find neither a free-of-cost period shifter nor glider synthesis (maybe because of my poor skills at gencols). Both of those are essent...

Due to its relatively slow velocity, this reaction may be perhaps supported by streams of forward gliders coming from both directions and colliding just in front of it. And it would mean, that there is even no need to build a burning front like that for the caterpillar, and that may make things some...

In a different subtopic, a surprising 14c/65 reaction: Very nice! It can be chained: x = 30, y = 89, rule = B3/S23 6b2o$5b2obo$6bo2b2o$6bo3bo$7bobo2$7b3o8$21b2o$20bob2o$20bob3o$25b2o$ 24b3o$27bo$27b2o$22b2o2b2o$22bo2bo$23b3o$24bo2$11bo$11bo3$5b2obo$4bobo bobo$4bo$2b2o6bo$2obobo$bobo$2bo3bo$6b3o$4b3...

A fast and compact backward MWSS with 3 hives.

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x = 15, y = 18, rule = B3/S23
2bo$obo$b2o7$3b2o4bo$2bo2bo2bobo$3b2o3bobo$9bo2$13bo$12bobo$12bobo$13b
o!

A clunky 5-block seed for a backward LWSS until a better one is found: But on the other hand the underlying reaction is quite easy to trigger, e. g. x = 421, y = 26, rule = B3/S23 18b2o37bo48bo49bo49bo49bo45bo49bo49bo$18b2o35bobo46bobo47bobo47bobo47b obo10b2o31bobo47bobo47bobo$56b2o47b2o48b2o48b2o1...

By the way, the snake would work too. I don't know though if it is easier to build it with the SUCC than the eater. x = 17, y = 10, rule = B3/S23 b5o$o4bo8b2o$5bo8b2o$o3bo$2bo$11b2o$11bobob2o$9bobob2obo$8bobo$9bo! Here is the active site: .@@@@@............. @....@........@@... .....@........@@... @...

Is this one known? MWSS from 3 blocks. x = 9, y = 9, rule = B3/S23 6bo$2o4bobo$2o4b2o5$b2o4b2o$b2o4b2o! Found with gencols (1st collision at gen 10, 2nd between 10 and 40, 3nd between 10 and 80, result taken at gen 200). No other 3 blocks collisions resulting in spaceships except the LWSS synthesis ...

Maybe there's a pure Blockic backward LWSS seed with four blocks -- I haven't tried any two-block constellations as targets yet. I've tried some glider+2 blocks collisions that result in a pi-heptomino, but none of those pi-heptominoes fit into this reaction. But a block+hive worked well. x = 13, y...

calcyman wrote:I discovered that one several years ago with ptbsearch. There's also a variant where the tub is replaced with a transparent loaf:

Or a ship.

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x = 19, y = 15, rule = B3/S23
2o15b2o$bo15bo$bobo7bo3bobo$2b2o6bo4b2o$10b3o4$10b2o$10b2o3$13b2o$12bo
bo$12b2o!

A small naturally occurring p10. I wonder, if there is something like pentadecathlon.com but for HighLife.

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x = 6, y = 2, rule = B36/S23
2obobo$b2ob2o!

knightlife wrote:This can be used to make a memory cell:

But without a way to read the state of the memory cell, it's more or less useless, isn't it?

A Spartan stable catalyst: pi -> queen bee / pi -> 2 * century. Probably already known.

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x = 23, y = 7, rule = B3/S23
21b2o$10b3o8bo$10bobo6bobo$2b2o6bobo6b2o$bobo$bo$2o!

If there were a stable reflector with recovery time <= 41, that would be enough to make a period 41 oscillator trivial. What I was thinking of is a stable glider-to-pi converter, but it seems that there is none with reasonable recovery time.

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