## Spaceship Eaters

For discussion of specific patterns or specific families of patterns, both newly-discovered and well-known.

### Spaceship Eaters

Post any spaceship eaters you have constructed here.

Almost Swan eater
`x = 29, y = 25, rule = B3/S239bo\$9b3o\$12bo\$11b2o9bo\$20b3o\$19bo\$19b2o2\$o\$3o\$3bo21b2o\$2b2o17b2o2b2o\$21b2o\$6bo10b2o\$5b5o6b2o\$5bo2b2o8bo7b2o\$7b2obo5b2o6b3obo\$16b2o3bob2o\$10bobo6b2o\$15b3obo4bo\$12b3o3bo4bo\$13bo7bo\$13bo6bo2\$16bo!`

I'm still working on it, updates will come soon.
Axaj

Posts: 232
Joined: September 26th, 2009, 12:23 am

### Re: Spaceship Eaters

Here are 10 glider eaters that I have made: (These are not in Dean's collection!)

`x = 77, y = 74, rule = B3/S2322bo34bo\$15bo4b3o27bo4b3o\$16bobbo31bobbo\$7bobo4b3obobo6boo20b3obobo6boo\$7boobo8bo7bo26bo7bo\$10b3o15bo34bo\$7boo4bo13boo33boo\$7bob5o3boo6bo26boo6bo\$9bo7boobbooboboobo13boo7boobbooboboobo\$8bo3boo7booboboboo14bobboo7booboboboo\$7bo3bobo10bo19bobobo10bo\$7boo3bo3boo3boobo18boobbo3boo3boobo\$15bobo4bobobo14bobbo5bobo4bobobo\$15bobobobbobboo14boo7bobobobbobboo\$14boobob4o26boobob4o\$12bo5bo28bo5bo\$12b5obobboo24b5obobboo\$17bo3boo29bo3boo\$12boobo31boobo\$12booboo30booboo9\$10bo18bo18bo18bo\$11bobooboo12bobooboo12bobooboo12bobooboo\$9b3obboboo10b3obboboo10b3obboboo10b3obboboo\$14bo18bo18bo18bo\$3boo7bobo7boo7bobo16bobo16bobo\$bbobbo6boo7bobbo6boo9boo6boo9boo6boo\$bobobbo13bobobbo16bobo16bobo\$obboobo12bobboobo18bo18bo\$boo3b3o3boo6boo3b3o3boo11b3o3boo11b3o3boo\$3b3o3bobboo8b3o3bobboo9boo3bobboo9boo3bobboo\$3bobb4o12bobb4o12bobb4o12bobb4o\$4boo17boo16b3o16b3o\$b3obb4o10b3obb4o15b4o15b4o\$bobboo3bo3boo5bobboo3bo10b5o3bo3boo5b5o3bo\$bboobboobobobbo6boobbooboboboo5bo4boobobobbo5bo4booboboboo\$4bobbobob3o9bobboboboobo8bobbobob3o9bobboboboobo\$4boobbo14boo4bo12boobbo14boo4bo\$9b3o13b3obo17b3o13b3obo\$11bo13bobbo20bo13bobbo\$26boo36boo4\$14boo17boo17boo17boo\$14bobo16bobo16bobo16bobo\$10bo5bo12bo5bo12bo5bo12bo5bo\$11bo4boboo10bo4boboo10bo4boboo10bo4boboo\$9b3oboobobo9b3oboobobo9b3oboobobo9b3oboobobo\$14bobobo14bobobo14bobobo14bobobo\$14bobbo15bobbo15bobbo15bobbo\$3boo7bobo7boo7bobo16bobo16bobo\$bbobbo6boo7bobbo6boo9boo6boo9boo6boo\$bobobbo13bobobbo16bobo16bobo\$obboobo12bobboobo18bo18bo\$boo3b3o3boo6boo3b3o3boo11b3o3boo11b3o3boo\$3b3o3bobboo8b3o3bobboo9boo3bobboo9boo3bobboo\$3bobb4o12bobb4o12bobb4o12bobb4o\$4boo17boo16b3o16b3o\$b3obb4o10b3obb4o15b4o15b4o\$bobboo3bo3boo5bobboo3bo10b5o3bo3boo5b5o3bo\$bboobboobobobbo6boobbooboboboo5bo4boobobobbo5bo4booboboboo\$4bobbobob3o9bobboboboobo8bobbobob3o9bobboboboobo\$4boobbo14boo4bo12boobbo14boo4bo\$9b3o13b3obo17b3o13b3obo\$11bo13bobbo20bo13bobbo\$26boo36boo!`

They have very long stabilisation times.

I've made a weekender eater, which uses an interesting block perturbation.

`x = 51, y = 38, rule = B3/S2344boo\$44bo\$41boobo\$36boobboboboboo\$36bo3bobobobbo\$37b3obobobobboo\$39boboboboobobo\$39bobobo4bobo\$40boob4obbo\$47boo\$45boo\$9boo35bo\$4boo3b3o34bobo\$9boo36boo\$4b3o35boo\$oobboo36bobo\$3oboo38bo\$bboboo38boo\$bbo3bo27boo\$bbo3bo27boo\$bboboo38boo\$3oboo38bo\$oobboo36bobo\$4b3o35boo\$9boo36boo\$4boo3b3o34bobo\$9boo35bo\$45boo\$47boo\$40boob4obbo\$39bobobo4bobo\$39boboboboobobo\$37b3obobobobboo\$36bo3bobobobbo\$36boobboboboboo\$41boobo\$44bo\$44boo!`

The massive eaters cannot be replaced with smaller ones -- the spark would interfere.

An eater for the 2c/5 ship:

`x = 50, y = 35, rule = B3/S2334bo\$33bobo\$34bo\$\$32b5o\$32bo4bo\$35bobbo\$35boobobbo\$32bo5bobobo\$31bobo4bobbo\$31bobbobboo\$32boo\$4b3o\$b3obbo\$bb5o\$bboo\$9boo\$8bobo\$3bo3boobo37boo\$obo6bo38bo\$ob7o37bobo\$46boo\$ob7o\$obo6bo\$3bo3boobo\$8bobo\$9boo\$bboo\$bb5o\$b3obbo\$4b3o\$37boo\$37bobo\$39bo\$39boo!`

Converters are also quite useful. I completed a glider => Cordership converter a short while ago; you can read a commentary on Dave Greene's blog:

http://b3s23life.blogspot.com/2009/02/first-complete-glider-to-cordership.html

Less well-known is the reverse reaction, which transforms a Cordership back into a glider. I have built one that accepts Corderships with a 487-tick spacing:

`x = 215, y = 156, rule = S23/B337boo\$33bobobbo\$31b3oboo\$30bo\$31b3oboo\$33boboo\$56boo\$55bobo\$56bo6\$64boo60boo\$63bobo39bo20boo\$64bo40b3o\$108bo\$107boo4\$72boo60boo\$71bobo60boo\$13bo58bo\$13b3o\$16bo\$15boo26bo\$42bobo\$42boo\$80boo\$79bobo15bo\$80bo16b3o\$6bo93bo\$6b3o90boo\$9bo41bo\$8boo40bobo\$30boo18boo\$30boo56boo\$87bobo\$88bo3\$59bo\$18boo38bobo\$18boo38boo\$4boo135bo\$4boo135bo\$oo139bo\$oo142boo\$144boo12boo\$67bo71bo3b3o11boo\$66bobo71b3o15bo\$66boo73bo15b3o\$22boo116boo15b3o\$21bobbo115b3o16bo\$21bobo118bo14bobbo\$22bo117bo16b3o5boo\$142bo15bo6boo\$60bo79b3o\$58b3o5bo5boo\$35boo20bo6b3o5boo\$36bo20boo4bo\$36bobo24boo\$37boo\$156boo\$46boo107bobboo13b3o\$46boo6boo99b5o16bo\$54boo24boo73b4o9boobbo3bo\$70boo8boo65b4o9boo8boboobbo\$58boo10boo61b3o10bo5boo4bobbo\$57bobo86bo4bo10bo10boo\$58bo78boo7boob4obo5boo\$45boo92bo11bo3bo3boo\$45bo87b4obo16boboo\$46b3o84b5o18boo\$48bo9boo51bo49bo\$59bo17bo6boo25bo49bo\$56b3o17bobo5boo25bo21bobo\$56bo20bo36boo17bobo\$114boo12boo4bo\$109bo3b3o11boo4bobo\$110b3o15bo5boo\$18boo73boo16bo15b3o4bo\$18boo73boo15boo15b3o\$110b3o16bo\$112bo14bobbo\$71boo37bo16b3o\$72bo39bo15bo52bo\$69b3o38b3o67bobo\$35boo32bo109bo3bo\$35bo144bobo\$33bobo145bo14b3o\$33boo160bo3bo\$181b4o10b3obbo\$90boo33bobo52bo4bo9bo3bo\$90bo34bobbo53bo13b3o\$91b3o31bobbo50bo3bobbo9boo7boo\$93bo31bo3bo49bob3obo19boo\$115boo9bobo51b3obo\$115boo10bo\$\$37boo159bo\$37bobo155b5o\$39bo154bo\$39boo169bo\$10boo17boo49boo4boo107bo3bo9boboo\$10bo18boo49boo4boo35boo71b3o12b3o\$11b3o109boo77boo4b3o3bo\$13bo171boo14bobbo4b5o\$185boo3bo9bo5bo5bo\$19boo60boo91bo14boo8bobboo\$19boo60boobboo86b3o13bo4bo3booboob3o\$85bobo84booboo16boo3bobbo\$87bo85b3o17bobobboboo\$35boo50boo85bo18boo4boo\$36bo137bobo14bobo\$33b3o138b4o13b3o\$33bo117bo25bo14bo\$29boo119bobo\$29bo119bo3bo19booboo\$27bobo49boo69bobo19bo5bo\$27boo44boo4bo71bo14b3o4bo3bo\$12bo60bobo4b3o82bo3bo4bo\$12b3o37boo21bo6bo68b4o10b3obbo\$15bo35bobo21boo73bo4bo9bo3bo\$14boo35bo100bo13b3o\$50boo97bo3bobbo9boo\$149bob3obo\$150b3obo\$46boo\$46bo\$44bobo18boo101bo\$44boo10boo7boo98b5o\$57bo106bo\$57bobo\$52boo4boo105bo3bo\$7boo44bo20boo90b3o\$7boo44bobo18bo\$54boo16bobo80boo\$72boo81boo\$\$12boo\$12boo\$8boo\$8boo\$\$163boo\$14boo27boo118boo\$14boo14boo11boo\$31bo\$28b3o35boo\$28bo37boobboo\$70bobo\$72bo\$72boo!`

And, because I can't find anywhere else to post this, a conduit to transform a Herschel into an eater:

`......*.....................*.*....................*.*.....................*.................................................................................................................................................................................*..................**..*.*................*.*.***..................*...*..................**..................................................................................................................................................**....................*.*....................*.....................**...............`
What do you do with ill crystallographers? Take them to the mono-clinic!

calcyman

Posts: 1514
Joined: June 1st, 2009, 4:32 pm

### Re: Spaceship Eaters

56p6h1v0 to 2 B-heptos and a block.
`x = 34, y = 22, rule = B3/S232o30b2o\$bo30bo\$bobo26bobo\$2b2o26b2o7\$9b3o10b3o\$4b3obo7b2o7bob3o\$8bo3bo2bo2bo2bo3bo\$8bo5bo4bo5bo\$14b2o2b2o\$11bo3bo2bo3bo\$11bobo6bobo\$12b10o\$14bo4bo\$12bo8bo\$11bo10bo\$12bo8bo!`

Spider + Block shifts block and makes J-heptoplet:
`x = 31, y = 15, rule = B3/S2325b2o\$25b2o7\$6bo3b3o5b3o3bo\$3b2ob5ob2o3b2ob5ob2o\$bob2obo5bobobobo5bob2obo\$o3bobo3b5ob5o3bobo3bo\$4b3o5b2o3b2o5b3o\$bo2bob3o13b3obo2bo\$3bo23bo!`
Axaj

Posts: 232
Joined: September 26th, 2009, 12:23 am

### Re: Spaceship Eaters

Better swan eater?
`x = 29, y = 23, rule = B3/S235b2o\$6bo\$6bobo\$7b2o3\$o\$3o21b2o\$3bo20b2o\$2b2o2\$6bo10b2o\$5b5o6b2o\$5bo2b2o8bo7b2o\$7b2obo5b2o6b3obo\$16b2o3bob2o\$10bobo6b2o\$15b3obo4bo\$12b3o3bo4bo\$13bo7bo\$13bo6bo2\$16bo!`
I Like My Heisenburps! (and others)

Extrementhusiast

Posts: 1690
Joined: June 16th, 2009, 11:24 pm
Location: USA

### Re: Spaceship Eaters

Swan eater:
`x = 30, y = 21, rule = B3/S2314bo\$13bobo\$13bobo\$o10b3ob2o\$3o7bo\$3bo7b3ob2o\$2b2o9bob2o\$27b2o\$27b2o\$7bo10b2o\$6b5o6b2o\$6bo2b2o8bo7b2o\$8b2obo5b2o6b3obo\$17b2o3bob2o\$11bobo6b2o\$16b3obo4bo\$13b3o3bo4bo\$14bo7bo\$14bo6bo2\$17bo!`

EDIT:
The eater is clean enough to stop boat stretching without interference:
`x = 41, y = 35, rule = B3/S2314bo\$13bobo\$13bobo\$o10b3ob2o\$3o7bo\$3bo7b3ob2o\$2b2o9bob2o\$27b2o\$27b2o12\$29b2o\$17b3o9bobo\$17bo2b3o6bo9bo\$18bobo16b2obo\$23bo4b2o2bo3b2o2bo\$21bo6b2o2bob2o2bo\$23bob2obo3b5o\$32b2o\$24bo2b6o\$25b7o\$27b3o2\$30bo\$29bobo\$30b2o!`
knightlife

Posts: 566
Joined: May 31st, 2009, 12:08 am

### Re: Spaceship Eaters

Of course, an eater1 in a slightly different location can replace the eater2, reducing the bounding box, population count and construction difficulty:

`x = 41, y = 32, rule = B3/S23o\$3o9boo\$3bo9bo\$bboo9bobo\$14boo11boo\$27boo12\$29boo\$17b3o9bobo\$17bobb3o6bo9bo\$18bobo16boobo\$23bo4boobbo3boobbo\$21bo6boobboboobbo\$23boboobo3b5o\$32boo\$24bobb6o\$25b7o\$27b3o\$\$30bo\$29bobo\$30boo!`
What do you do with ill crystallographers? Take them to the mono-clinic!

calcyman

Posts: 1514
Joined: June 1st, 2009, 4:32 pm

### Re: Spaceship Eaters

A smaller and faster eater for the 2c/5 spaceship:
`x = 40, y = 33, rule = B3/S2335bo\$34bobo\$34bobo\$33b2ob3o\$39bo\$33b2ob3o\$33b2obo\$4b3o\$b3o2bo\$2b5o\$2b2o\$9b2o\$8bobo\$3bo3b2obo\$obo6bo\$ob7o2\$ob7o\$obo6bo\$3bo3b2obo\$8bobo\$9b2o\$2b2o\$2b5o\$b3o2bo\$4b3o\$33b2obo\$33b2ob3o\$39bo\$33b2ob3o\$34bobo\$34bobo\$35bo!`

It can handle a p52 stream in a unique way (by eating pairs of spaceships as well as singles), or p53 and higher in the normal way.
knightlife

Posts: 566
Joined: May 31st, 2009, 12:08 am

### Re: Spaceship Eaters

A simpler weekender eater:
`x = 43, y = 18, rule = B3/S237bo\$5b2obo\$4bo4bo\$4b2o2bo\$2bobob2o31b2o\$o2bo35bobo\$o40bo\$obo38b2o\$b2ob2o\$b2ob2o\$obo38b2o\$o40bo\$o2bo35bobo\$2bobob2o31b2o\$4b2o2bo\$4bo4bo\$5b2obo\$7bo!`
knightlife

Posts: 566
Joined: May 31st, 2009, 12:08 am

### Re: Spaceship Eaters

`x = 24, y = 24, rule = B3/S23o\$3o\$3bo\$2b2o11b2o\$15b2o8\$11b3o\$11bo9b2o\$12bo6b3obo\$14b2o2b2o\$15bo\$19bo\$15b2o3bo\$14bobob2o\$14bobo2bob2o\$13bo4b2o\$13b2o\$13b2o!`

That was easy compared to finding one for 114p6h1v0 (impossible?)

A glider blasts through leaving only still life patterns behind:
`x = 18, y = 39, rule = B3/S23o\$b2o\$2o2\$8b2o\$6bo4bo\$5bo6bo\$4bo8bo\$4b2ob4ob2o3\$6b2o2b2o\$6b2o2b2o2\$8b2o\$7b4o\$6b2o2b2o\$6bo4bo\$8b2o\$6bo4bo\$6bo4bo\$bo14bo\$obo4bo2bo4bobo\$3bo3b4o3bo\$o16bo\$2b2o10b2o\$b3o10b3o\$6bo4bo\$4b2obo2bob2o\$4b2o2b2o2b2o\$4b2o6b2o\$5b2ob2ob2o\$5b2ob2ob2o3\$3b3o6b3o\$2bo3bo4bo3bo\$5bo6bo\$2b2o10b2o!`
knightlife

Posts: 566
Joined: May 31st, 2009, 12:08 am

### Re: Spaceship Eaters

knightlife wrote:That was easy compared to finding one for 114p6h1v0 (impossible?)

Not impossible, certainly... at least with a liberal definition of "eater". For example, you could hook up the two Herschel outputs in the following pattern to the seven asynchronous LWSS and glider inputs, and you'd have a stable 114p6h1v0-eating pattern:

`#C unfinished sample eater for 114p6h1v0x = 154, y = 130, rule = B3/S2373bobo\$76bo\$76bo\$73bo2bo\$74b3o4\$78bobo\$77bo\$77bo\$77bo2bo\$77b3o7\$78bobo\$77bo\$77bo\$77bo2bo\$77b3o20\$67b2o16b2o\$68bo16bo\$68bobo12bobo\$69b2o5b2o5b2o\$76b2o3\$72b2o6b2o\$72b2o6b2o2\$64bo24bo\$64b3o20b3o\$67bo18bo\$35bo30b2o18b2o30bo\$35b3o78b3o\$38bo76bo\$37b2o76b2o\$50bo52bo\$48b3o52b3o\$47bo58bo\$47b2o56b2o3\$21bo11b2o26bo30bo26b2o11bo\$19b3o11b2o24b3o12b2o2b2o12b3o24b2o11b3o\$18bo39bo15b2o2b2o15bo39bo\$18b2o38b2o34b2o38b2o7\$28b2o94b2o\$28b2o26b2o13b2o8b2o13b2o26b2o\$bo54b2o13b2o8b2o13b2o54bo\$obo148bobo\$obo148bobo\$bo150bo2\$31b2o88b2o\$32bo88bo\$31bo90bo\$31b2o29b3o24b3o29b2o\$64bo24bo\$63bo26bo\$53b3o42b3o\$55bo42bo\$54bo44bo4\$76b2o\$74bo4bo\$73bo6bo\$72bo8bo\$72b2ob4ob2o3\$74b2o2b2o\$74b2o2b2o2\$76b2o\$75b4o\$74b2o2b2o\$74bo4bo\$76b2o\$74bo4bo\$74bo4bo\$69bo14bo\$68bobo4bo2bo4bobo\$71bo3b4o3bo\$68bo16bo\$70b2o10b2o\$69b3o10b3o\$74bo4bo\$72b2obo2bob2o\$72b2o2b2o2b2o\$72b2o6b2o\$73b2ob2ob2o\$73b2ob2ob2o3\$71b3o6b3o\$70bo3bo4bo3bo\$73bo6bo\$70b2o10b2o!`

This would probably be more of a converter than an eater, I suppose, since you could get any number of signals out of the thing during the cleanup stage. The pattern would take thousands of ticks to recover, but I'm not in any particular hurry -- at least until someone shows me a 114p6h1v0-gun. We still seem to be a long way from finding a construction recipe for anything that big.

Should really fire up gencols or ptbsearch to look for better base reactions in cases like this, I suppose -- but it's too much fun drawing in various catalysts by hand and then, usually, watching everything blow up.

I wouldn't be surprised if it was possible to place, say, a sacrificial block or beehive in the path of the spaceship, and add various catalysts to get a fairly clean glider or Herschel out of the resulting mess, and route that signal around to rebuild the "bait" still life and maybe shoot down one or two leftover pieces of junk. Here's a sample where you'd have to rebuild a beehive and clean up three other objects:

`#C 114p6h1v0 + beehive -> 2 R-pentominoes, 2 beehives and a boatx = 20, y = 41, rule = B3/S2314bo\$13bobo\$13bobo\$14bo3\$2o8b2o\$2o6bo4bo\$7bo6bo\$6bo8bo\$6b2ob4ob2o3\$8b2o2b2o\$8b2o2b2o2\$10b2o\$9b4o\$8b2o2b2o\$8bo4bo\$10b2o\$8bo4bo\$8bo4bo\$3bo14bo\$2bobo4bo2bo4bobo\$5bo3b4o3bo\$2bo16bo\$4b2o10b2o\$3b3o10b3o\$8bo4bo\$6b2obo2bob2o\$6b2o2b2o2b2o\$6b2o6b2o\$7b2ob2ob2o\$7b2ob2ob2o3\$5b3o6b3o\$4bo3bo4bo3bo\$7bo6bo\$4b2o10b2o!`

Still might not be worth finishing a construction along these lines, but it'd be a big improvement over the LWSS cleanups in the blueprint above.

dvgrn
Moderator

Posts: 4476
Joined: May 17th, 2009, 11:00 pm

### Re: Spaceship Eaters

dvgrn wrote:Not impossible, certainly... at least with a liberal definition of "eater".

I had a feeling a positive result would show up, that's why I added the question mark. I know it inspires me when I am told something is impossible or can't be done.

If the definition is "eater = eat it in n tics or less" then eating a 114p6h1v0 is truly impossible for sufficiently small n. My idea of n in this case was around 100 or even 200, but I didn't specify. I like your solution.

My next question is:
How few blocks does it take to create a "one-time eater" or vanish reaction for the 114p6h1v0?

4?
`x = 25, y = 85, rule = B3/S2313b2o\$13b2o19\$23b2o\$23b2o\$5b2o\$5b2o5\$2o\$2o21\$13b2o\$11bo4bo\$10bo6bo\$9bo8bo\$9b2ob4ob2o3\$11b2o2b2o\$11b2o2b2o2\$13b2o\$12b4o\$11b2o2b2o\$11bo4bo\$13b2o\$11bo4bo\$11bo4bo\$6bo14bo\$5bobo4bo2bo4bobo\$8bo3b4o3bo\$5bo16bo\$7b2o10b2o\$6b3o10b3o\$11bo4bo\$9b2obo2bob2o\$9b2o2b2o2b2o\$9b2o6b2o\$10b2ob2ob2o\$10b2ob2ob2o3\$8b3o6b3o\$7bo3bo4bo3bo\$10bo6bo\$7b2o10b2o!`

no...3?
`x = 24, y = 45, rule = B3/S239b2o\$9b2o9\$11b2o\$9bo4bo\$8bo6bo\$7bo8bo\$7b2ob4ob2o3\$9b2o2b2o\$9b2o2b2o2\$11b2o\$10b4o\$9b2o2b2o\$2o7bo4bo7b2o\$2o9b2o9b2o\$9bo4bo\$9bo4bo\$4bo14bo\$3bobo4bo2bo4bobo\$6bo3b4o3bo\$3bo16bo\$5b2o10b2o\$4b3o10b3o\$9bo4bo\$7b2obo2bob2o\$7b2o2b2o2b2o\$7b2o6b2o\$8b2ob2ob2o\$8b2ob2ob2o3\$6b3o6b3o\$5bo3bo4bo3bo\$8bo6bo\$5b2o10b2o!`
knightlife

Posts: 566
Joined: May 31st, 2009, 12:08 am

### Re: Spaceship Eaters

dvgrn wrote:I wouldn't be surprised if it was possible to place, say, a sacrificial block or beehive in the path of the spaceship, and add various catalysts to get a fairly clean glider or Herschel out of the resulting mess, and route that signal around to rebuild the "bait" still life and maybe shoot down one or two leftover pieces of junk

This sacrificial loaf does a very good job even without catalysts...
`x = 18, y = 46, rule = B3/S238bo\$7bobo\$7bo2bo\$8b2o8\$8b2o\$6bo4bo\$5bo6bo\$4bo8bo\$4b2ob4ob2o3\$6b2o2b2o\$6b2o2b2o2\$8b2o\$7b4o\$6b2o2b2o\$6bo4bo\$8b2o\$6bo4bo\$6bo4bo\$bo14bo\$obo4bo2bo4bobo\$3bo3b4o3bo\$o16bo\$2b2o10b2o\$b3o10b3o\$6bo4bo\$4b2obo2bob2o\$4b2o2b2o2b2o\$4b2o6b2o\$5b2ob2ob2o\$5b2ob2ob2o3\$3b3o6b3o\$2bo3bo4bo3bo\$5bo6bo\$2b2o10b2o!`
knightlife

Posts: 566
Joined: May 31st, 2009, 12:08 am

### Re: Spaceship Eaters

30P5H2V0 eater.
`x = 19, y = 25, rule = B3/S238bo\$7bobo\$8bo2\$6b5o\$5bo4bo\$4bo2bo\$bo2bob2o\$obobo5bo\$bo2bo4bobo\$4b2o2bo2bo\$9b2o3b2ob2o\$13bo\$12b2ob2o\$b2o10bo3bo\$2bo13bo\$2bobo7bo\$3b2o5bo\$9b2ob3o\$8b2o\$9b2obo\$3b2o5bo\$2bobo7b3o\$2bo10b2o\$b2o!`
Call me "Dannyu NDos" in Forum. Call me "Bak Shinhwan"(박신환) in Wiki.
David

Posts: 211
Joined: November 3rd, 2009, 2:47 am
Location: Daejeon, South Korea

### Re: Spaceship Eaters

I made wickender with tagalong eater, but not complete.
`x = 51, y = 88, rule = B3/S234bo41bo\$3bobo39bobo\$3bobo39bobo\$b3ob2o37b2ob3o\$o49bo\$b3ob2o37b2ob3o\$3bob2o37b2obo10\$2b2o43b2o\$bobo43bobo\$bo47bo\$2o47b2o9\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$7bobo10bobo5bobo10bobo\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$9bo3b4o3bo9bo3b4o3bo\$13b4o8bo8b4o\$9b4o4b4o2b5o2b4o4b4o\$22bobobobo\$11bo6bo13bo6bo\$12b2o2b2o6bobo6b2o2b2o\$21bo2bobo2bo\$21bo2bobo2bo\$21bobo3bobo3\$21b2o5b2o\$21b2o5b2o2\$23b2ob2o\$22bobobobo\$22bobobobo\$24bobo\$22b2o3b2o13\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$7bobo10bobo5bobo10bobo\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$9bo3b4o3bo9bo3b4o3bo\$13b4o8bo8b4o\$9b4o4b4o2b5o2b4o4b4o\$22bobobobo\$11bo6bo13bo6bo\$12b2o2b2o6bobo6b2o2b2o\$21bo2bobo2bo\$21bo2bobo2bo\$21bobo3bobo3\$21b2o5b2o\$21b2o5b2o2\$23b2ob2o\$22bobobobo\$22bobobobo\$24bobo\$22b2o3b2o!`
Call me "Dannyu NDos" in Forum. Call me "Bak Shinhwan"(박신환) in Wiki.
David

Posts: 211
Joined: November 3rd, 2009, 2:47 am
Location: Daejeon, South Korea

### Re: Spaceship Eaters

David wrote:I made wickender with tagalong eater, but not complete.
`x = 51, y = 88, rule = B3/S234bo41bo\$3bobo39bobo\$3bobo39bobo\$b3ob2o37b2ob3o\$o49bo\$b3ob2o37b2ob3o\$3bob2o37b2obo10\$2b2o43b2o\$bobo43bobo\$bo47bo\$2o47b2o9\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$7bobo10bobo5bobo10bobo\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$9bo3b4o3bo9bo3b4o3bo\$13b4o8bo8b4o\$9b4o4b4o2b5o2b4o4b4o\$22bobobobo\$11bo6bo13bo6bo\$12b2o2b2o6bobo6b2o2b2o\$21bo2bobo2bo\$21bo2bobo2bo\$21bobo3bobo3\$21b2o5b2o\$21b2o5b2o2\$23b2ob2o\$22bobobobo\$22bobobobo\$24bobo\$22b2o3b2o13\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$7bobo10bobo5bobo10bobo\$8bo12bo7bo12bo\$8bo12bo7bo12bo\$9bo3b4o3bo9bo3b4o3bo\$13b4o8bo8b4o\$9b4o4b4o2b5o2b4o4b4o\$22bobobobo\$11bo6bo13bo6bo\$12b2o2b2o6bobo6b2o2b2o\$21bo2bobo2bo\$21bo2bobo2bo\$21bobo3bobo3\$21b2o5b2o\$21b2o5b2o2\$23b2ob2o\$22bobobobo\$22bobobobo\$24bobo\$22b2o3b2o!`

I'd call that a complete eater; if the second ship is also eaten, it's just two stage. In fact, a eater like this (but for a simpler ship, like a glider or *WSS) would be a great flip flop.
Axaj

Posts: 232
Joined: September 26th, 2009, 12:23 am

### Re: Spaceship Eaters

In fact, a eater like this (but for a simpler ship, like a glider or *WSS) would be a great flip flop.

There is an eater like this for the glider, which fits within a 4 * 2 bounding box. I leave it as an exercise to the reader to find it.

And it has been used as a flip flop in a binary counter, and in Dean Hickerson's Fibonacci pulse dividers.
What do you do with ill crystallographers? Take them to the mono-clinic!

calcyman

Posts: 1514
Joined: June 1st, 2009, 4:32 pm

### Re: Spaceship Eaters

calcyman wrote:
In fact, a eater like this (but for a simpler ship, like a glider or *WSS) would be a great flip flop.

There is an eater like this for the glider, which fits within a 4 * 2 bounding box. I leave it as an exercise to the reader to find it.

And it has been used as a flip flop in a binary counter, and in Dean Hickerson's Fibonacci pulse dividers.

You mean the snake? That produces its ship rather close to the snake; I was thinking something larger that makes something easier to utilize.
Axaj

Posts: 232
Joined: September 26th, 2009, 12:23 am

### Re: Spaceship Eaters

I was thinking something larger that makes something easier to utilize.

Here's one I prepared earlier:

`x = 108, y = 101, rule = B3/S23o\$boo\$oo64\$66bo\$67boo\$66boo\$77boo\$77boo8\$104bo\$103bobo\$103bobo\$84boo16booboo\$65boo17boo\$65boo35booboo\$102boobo\$107bo\$106boo\$\$70boo\$71bo26boo\$68b3o27boo4boo\$68bo6boo27bobo\$74bobo29bo\$74bo31boo\$73boo23boo\$98boo3\$93bo\$92bobo\$93bo!`
What do you do with ill crystallographers? Take them to the mono-clinic!

calcyman

Posts: 1514
Joined: June 1st, 2009, 4:32 pm

### Re: Spaceship Eaters

Axaj wrote:I was thinking something larger that makes something easier to utilize.

Boat-bits caught by snakes are surprisingly easy to make use of -- there have been at least half a dozen different mechanisms built into various patterns. Calcyman mentioned a couple, but there are other Herschel pulse dividers, and a "self-constructing" Herschel conduit, a way to catch a glider and turn it into a pi-heptomino and then a clean Herschel with another couple of following gliders, and some other non-Herschel-related reactions that can successfully test for the presence of a boat-bit.

This next part will be old hat to some people, and I may be wandering away from "something larger" into "something way too large", but here goes anyway: back in October 1996, Paul Callahan came up with a stable flip-flop circuit that produced a Herschel or glider output for every two glider inputs. Here are a couple of variants:

`#C asynchronous toggle memory:  Paul Callahan, 17 October 1996x = 299, y = 323, rule = B3/S23o\$b2o\$2o8\$10bo\$11b2o\$10b2o83\$o\$b2o\$2o8\$10bo\$11b2o\$10b2o37\$297bo\$296bobo\$297bo12\$296b2o\$290b2o4b2o\$290b2o4\$291b2o\$291b2o2b2o\$282b2o11bobo\$282bobo12bo\$284bo12b2o\$284b2o6\$283b2o\$283bobo\$285bo\$285b2o5\$183bo\$184b2o\$183b2o90b2o\$275b2o2\$266b2obo\$266bob2o\$284b2o\$284bo\$282bobo\$193bo88b2o\$194b2o\$193b2o72bo\$204b2o61b3o\$204b2o52bo11bo\$239b2o17b3o8b2o14bo\$240bo20bo22bobo\$239bo20b2o23bo\$239b2o\$230b2o\$230bobo\$203b2o26bo\$203b2o2\$242b2o36b2o\$211b2o29b2o36bobo\$211b2o69bo\$273b2o7b2o\$273bo\$274b3o\$276bo2\$251b2o\$198b2o50bobo\$198b2o50bo\$202b2o45b2o\$201bobo\$201bo\$200b2o\$213b2o\$213b2o3\$215b2o\$215b2o15\$272b2o\$272b2o9\$287b2o\$287b2o10\$267b2o\$268bo\$265b3o\$265bo4\$283b2o\$283bobo\$285bo\$285b2o5\$183bo\$184b2o\$183b2o90b2o\$275b2o2\$266b2obo\$266bob2o\$284b2o\$284bo\$282bobo\$193bo88b2o\$194b2o\$193b2o72bo\$204b2o61b3o\$204b2o52bo11bo\$239b2o17b3o8b2o14bo\$240bo20bo22bobo\$239bo20b2o23bo\$239b2o\$230b2o\$230bobo\$203b2o26bo\$203b2o2\$242b2o36b2o\$211b2o29b2o36bobo\$211b2o69bo\$273b2o7b2o\$273bo\$274b3o\$276bo2\$251b2o\$198b2o50bobo\$198b2o50bo\$202b2o45b2o\$201bobo\$201bo\$200b2o\$213b2o\$213b2o3\$215b2o\$215b2o!`

It's big and slow, but Spartan (easily glider-constructible). There's a third version that uses an Fx77 conduit instead of the Fx119, but it's even slower to recover.

Nowadays there are slightly faster Herschel-based flip-flops, such as

`#C Herschel period doubler by Paul Callahan, 2 October 1997,#C attached to a Stephen Silver reflector -- recovery in 497 ticks.x = 263, y = 210, rule = B3/S23bo\$2bo\$3o117\$174bo\$174b3o\$177bo23b2o\$176b2o23bo\$199bobo\$157bo37b2o2b2o\$126bo4bo9bo15b3o35b2o\$127bo3b3o5b3o18bo\$125b3o6bo3bo20b2o11b2o\$133b2o3b2o32b2o8\$147b2o52b2o\$147b2o34b2o16bobo\$135b2o45bobo18bo\$134bo2bo44bo20b2o\$129b2o4b2o44b2o4b2o\$128bobo25bo3b2o23bo2bo\$128bo26bobo3bo23b2o\$127b2o26b2o3bo33b2o\$137b2o20bo12b2o20b2o\$137bo17b5obo10bo\$138b3o14bo4b2o11b3o\$140bo15b3o16bo\$158bob2o\$159bobo2\$204b2o\$204bo\$183b2o17bobo\$184bo17b2o\$184bobo\$185b2o3\$204b2o\$204bo\$202bobo11b2o\$202b2o12bo\$214bobo\$210b2o2b2o\$210b2o4\$209b2o\$209b2o4b2o\$215b2o8\$221b2o\$221bo\$219bobo\$219b2o5\$233bo\$223b2o6b3o\$223bo6bo\$221bobo6b2o\$221b2o\$261bo\$260bobo\$208b2o50bobo\$207bobo51bo\$207bo12b2o11b2o\$206b2o12b2o11b2o5\$209b2o\$208bobo\$208bo\$207b2o\$218b2o21b2o\$218b2o22bo\$239b3o\$239bo!`

But obviously, useful stable flip-flop patterns with glider inputs are still fairly big and slow. There are lots of smaller period doublers that are periodic -- i.e., patterns including oscillators as well as still lifes. Some examples are given here (LifeNews). But I'm afraid that's getting _really_ far afield from the original subject.

EDIT Apr 2017: If anyone does a search and ends up here, there's been a lot of progress on period-doubling "flip-flops" in the past several years, starting with Guam's semisnark. See also the Stable Signal Converters thread for mechanisms that could easily be blocked off to make spaceship eaters.

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