## Challenge: Moving Rake Gun (AKA Rake Rake)

For discussion of specific patterns or specific families of patterns, both newly-discovered and well-known.
Gamedziner
Posts: 796
Joined: May 30th, 2016, 8:47 pm
Location: Milky Way Galaxy: Planet Earth

### Challenge: Moving Rake Gun (AKA Rake Rake)

We know that many rakes produce gliders, and that gliders can be used to make more rakes. From this knowledge, I challenge everyone to try to make rakes whose gliders interact just right to make more rakes moving in the opposite direction.

Code: Select all

``````x = 81, y = 96, rule = LifeHistory
58.2A\$58.2A3\$59.2A17.2A\$59.2A17.2A3\$79.2A\$79.2A2\$57.A\$56.A\$56.3A4\$27.
A\$27.A.A\$27.2A21\$3.2A\$3.2A2.2A\$7.2A18\$7.2A\$7.2A2.2A\$11.2A11\$2A\$2A2.2A
\$4.2A18\$4.2A\$4.2A2.2A\$8.2A!
``````

dvgrn
Moderator
Posts: 6320
Joined: May 17th, 2009, 11:00 pm
Contact:

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

Gamedziner wrote:We know that many rakes produce gliders, and that gliders can be used to make more rakes. From this knowledge, I challenge everyone to try to make rakes whose gliders interact just right to make more rakes moving in the opposite direction.
This would be a type MMM breeder -- moving objects creating moving objects creating moving objects. Does Golly's Patterns/Life/Breeders/rake-breeder.rle count?

Code: Select all

``````#C Rake puffer -- a type-MMM breeder
#C Creates a new rake every 60 generations.
#C Achim Flammenkamp, 1994
#C From "rake-puff.lif" in Jason Summers' "jslife" pattern collection.
x = 398, y = 405, rule = B3/S23
81b2o5b4o\$79b2ob2o3bo3bo\$79b4o8bo\$80b2o5bo2bo2\$75b2o9bo\$73b5o8b3o\$73b
2o4bo5bo3bo\$73b2o5b5o4bo\$75b2o4b4obob2o\$78b3ob2o3bo\$84bobo2\$64bo\$62b2o
24b4o\$63b2o22bo3bo\$70b4o17bo\$69bo3bo13bo2bo\$49bo23bo\$47b2o20bo2bo\$48b
2o14b2o\$63b4o\$53bo9b2ob2o\$53bo11b2o\$49bo2b2o4bobo\$49bo7bo2b2o\$49bo2b2o
4bobo\$53bo11b2o\$19bo20b2o11bo9b2ob2o\$17b2o20b4o20b4o\$18b2o19b2ob2o20b
2o\$30b3ob2o5b2o\$29b2o5bo\$28bo7b2o\$29b2o5bo\$30b3ob2o5b2o\$39b2ob2o\$39b4o
\$40b2o\$20bo2bo\$24bo\$20bo3bo\$10b2o9b4o\$9b2o5b3o\$5b3o6b2ob2o\$9b2o5b3o\$
10b2o9b4o\$20bo3bo19bo2bo\$24bo23bo\$20bo2bo7b2o11bo3bo\$33bo11b4o\$28bo7b
2o2b3o\$13b3o11bo8b2o2b3o\$13bo14bo7b2o2b3o\$14bo18bo11b4o\$31b2o11bo3bo\$
48bo80b2o5b4o\$28b3o13bo2bo79b2ob2o3bo3bo\$28bo98b4o8bo\$29bo23b2o73b2o5b
o2bo\$51b2ob2o\$51b4o16b2o\$43b3o6b2o15b2ob2o53bo7b2o\$43bo25b4o45b5o7b2o
3bobo\$44bo25b2o46bo18bo\$119b3o13b3o\$60bo3bo55bo4b2o\$60b2o5b3o55b2o\$55b
2o9bob3o\$54bo6bo8b2o\$3o5b3o3b3o36bo3bo3b8obo38bo26b4o\$o2bo4bo2bo2bo2bo
36bo3bo7b4o37b2o26bo3bo\$o7bo5bo43bo8bo40b2o8b4o17bo\$o7bo5bo102bo3bo13b
o2bo\$bobo5bobo3bobo42bo2bo57bo\$64bo6b2o21bo22bo2bo\$60bo3bo4b2ob2o18b2o
18b2o\$61b4o4b4o20b2o16b4o13b4o\$bo68b2o29bo9b2ob2o11bo3bo12bo2bo\$3o98bo
11b2o16bo16bo\$ob2o75bo17bo2b2o4bobo18bo2bo13bo3bo\$b3o73b2o18bo7bo2b2o
35b4o\$b2o75b2o17bo2b2o4bobo\$101bo11b2o6bo\$88b2o11bo9b2ob2o6bo18bobo\$
87b4o20b4o5b3o12b3ob2o3bo\$87b2ob2o20b2o18b2o4b4obob2o\$16b3o59b3ob2o5b
2o39b2o5b5o4bo\$15bo2bo58b2o5bo31bo13b2o4bo5bo3bo\$18bo57bo7b2o31bo12b5o
8b3o\$18bo30bo27b2o5bo30b3o14b2o9bo\$15bobo29b2o29b3ob2o5b2o\$48b2o37b2ob
2o45b2o5bo2bo\$87b4o20bo24b4o8bo\$88b2o22bo23b2ob2o3bo3bo\$110b3o18b2o5b
2o5b4o\$129b2ob2o\$45b2o28b2o28b2o10b3o5bo3b4o\$45b2o28b2o28b2o7bo2b3o3b
2obo3b2o\$114bobo6bo3bo\$30b3o5b3o73bo2b3o3b2obo3b2o\$30bo2bo4bo2bo9b2o
64b3o5bo3b4o\$30bo7bo12bobo42b4o8bo2bo17b2ob2o\$30bo7bo12bo32bo10bo3bo
12bo18b2o\$31bobo5bobo41bobo4b2o7bo8bo3bo\$81b2o2bo3b4o2bo2bo10b4o\$79b2o
bo5bo3b2o\$81b2o2bo3b4o2bo2bo\$31bo51bobo4b2o7bo\$30b3o51bo10bo3bo\$30bob
2o62b4o20b4o\$31b3o47b2o36bo3bo\$31b2o48bobo31bo7bo\$81bo28b7o2bo2bo\$109b
o2b3ob2o\$110b7o2bo2bo\$96b2o17bo7bo\$46b3o47bobo20bo3bo\$45bo2bo47bo23b4o
\$48bo\$48bo78b2o\$45bobo63b2o13b4o\$111bobo12b2ob2o14b2o42b2o5b4o\$111bo
16b2o14b4o39b2ob2o3bo3bo\$144b2ob2o38b4o8bo\$146b2o40b2o5bo2bo\$125bo\$
124b3o59bo\$123bob2o3bo11bo42b2o8b2o\$123bo6bo10b4o39bo9bo2bo\$60b3o5b3o
53bo14b5obo39b5o4bo2bo\$60bo2bo4bo2bo66bo6b2o39b4o3b2ob2o\$60bo7bo68bo3b
ob3o43bo4b2o\$60bo7bo69bo3b3o\$61bobo5bobo67bo32bobo\$173b3o\$145b2o26b3o
20b4o\$136b4o4b4o47bo3bo\$61bo73bo3bo4b2ob2o29b4o17bo\$60b3o76bo6b2o12bo
16bo3bo13bo2bo\$60bob2o71bo2bo19b2o21bo\$61b3o95b2o16bo2bo\$61b2o109b2o\$
171b4o13b4o\$145bo15bo9b2ob2o11bo3bo12bo2bo\$143b2o16bo11b2o16bo16bo\$
144b2o11bo2b2o4bobo18bo2bo13bo3bo\$76b3o78bo7bo2b2o35b4o\$75bo2bo78bo2b
2o4bobo15b3o\$78bo82bo11b2o\$78bo49b2o2bo15b2o11bo9b2ob2o7bo2bo14b2o\$75b
obo51bo3bo13b4o20b4o8bobo18bo\$131bo15b2ob2o20b2o4bo20b2o4b2o\$138b3ob2o
5b2o28bo18b2o6bo\$137b2o5bo32b3o17b2o7bo\$136bo7b2o52bo3bo2bo\$137b2o5bo
58bo\$138b3ob2o5b2o22bo\$147b2ob2o22bo22b2o5bo2bo\$100bo46b4o21b3o21b4o8b
o\$90b3o5b2o48b2o46b2ob2o3bo3bo\$90bo2bo4bo2bo89b2o5b2o5b4o\$90bo7bo2bo
66bo20b2ob2o\$90bo7bo30b2o28b2o8bo7b3o5bo3b4o\$91bobo5bo3bo25b2o28b2o6b
3o4bo2b3o3b2obo3b2o\$104bo69bobo6bo3bo\$101b2o71bo2b3o3b2obo3b2o\$177b3o
5bo3b4o\$91bo64b4o8bo2bo17b2ob2o\$90b3o51bo10bo3bo12bo18b2o\$90bob2o49bob
o4b2o7bo8bo3bo\$91b3o47b2o2bo3b4o2bo2bo10b4o\$91b2o46b2obo5bo3b2o\$141b2o
2bo3b4o2bo2bo\$143bobo4b2o7bo\$144bo10bo3bo\$156b4o20b4o\$106b3o70bo3bo\$
105bo2bo66bo7bo\$108bo38b2o21b7o2bo2bo\$108bo38bobo19bo2b3ob2o\$105bobo
39bo22b7o2bo2bo\$175bo7bo\$164bobo12bo3bo\$162b4o14b4o\$162bo2bo\$162bo24b
2o\$186b4o\$186b2ob2o14b2o40b2o5b4o\$177b2o9b2o14b4o37b2ob2o3bo3bo\$120b3o
54bobo24b2ob2o36b4o8bo\$120bo2bo53bo28b2o38b2o5bo2bo\$120bo\$120bo130b2o\$
121bobo70b2o39bob2o11b5o\$193bo2bo36bo5bo10bo4bo\$188b3o13b2o33bo10b3o2b
o\$187bo2bo8bo5b2o26bo5bo11bo2b2o\$121bo65b2ob2o3bo3bo4b2o28bo3bo2b2o9b
2o\$120b3o72bo4bo3bo30b3o3b2o\$120bob2o73bo\$121b3o\$121b2o82b2o47b4o\$196b
4o4b4o16bo28bo3bo\$195bo3bo4b2ob2o13b2o12b4o17bo\$199bo6b2o15b2o10bo3bo
13bo2bo\$195bo2bo40bo\$136b3o96bo2bo\$135bo2bo91b2o\$138bo70bo19b4o13b4o\$
138bo70bo9bo9b2ob2o11bo3bo12bo2bo\$135bobo81bo11b2o16bo16bo\$215bo2b2o4b
obo18bo2bo13bo3bo\$194bo20bo7bo2b2o35b4o\$192b2o21bo2b2o4bobo\$193b2o24bo
11b2o\$206b2o11bo9b2ob2o4bo13b2o\$205b4o20b4o6bo7bo4b2o\$205b2ob2o20b2o5b
3o6b3o13b3o\$196b3ob2o5b2o36bo18bo\$150b3o42b2o5bo42b5o7b2o3bobo\$150bo2b
o40bo7b2o29bo20bo7b2o\$150bo44b2o5bo31bo\$150bo45b3ob2o5b2o23b3o\$151bobo
51b2ob2o45b2o5bo2bo\$205b4o45b4o8bo\$206b2o20bo25b2ob2o3bo3bo\$229bo19b2o
5b2o5b4o\$151bo75b3o17b2ob2o\$150b3o28b2o28b2o22b3o5bo3b4o\$150bob2o27b2o
28b2o19bo2b3o3b2obo3b2o\$151b3o78bobo6bo3bo\$151b2o70bo8bo2b3o3b2obo3b2o
\$223bo11b3o5bo3b4o\$214b4o8bo2bo17b2ob2o\$202bo10bo3bo12bo18b2o\$201bobo
4b2o7bo8bo3bo\$166b3o30b2o2bo3b4o2bo2bo10b4o\$165bo2bo28b2obo5bo3b2o\$
168bo30b2o2bo3b4o2bo2bo\$168bo32bobo4b2o7bo\$165bobo34bo10bo3bo\$196b2o
16b4o20b4o\$196bobo38bo3bo\$196bo36bo7bo\$228b7o2bo2bo\$227bo2b3ob2o\$228b
7o2bo2bo\$233bo7bo\$237bo3bo\$238b4o2\$226b2o17b2o\$226bobo15b4o\$226bo17b2o
b2o14b2o\$246b2o14b4o38bo2bo\$262b2ob2o41bo6b2o\$241b2o21b2o38bo3bo4b2ob
2o\$181bo58b2o63b4o4b4o\$180b3o131b2o\$180bob2o55b2o\$181b3o77b2o\$181b2o
72b3o3bobo31bobo12b4o\$252b3o6bob2o28b3ob2o11bo2b2o\$252bo9b2o29b3ob3o
11bo2b2o\$252b3o7bo31b2ob2o12bo2bo\$295b3o3b2o9b2o\$196b3o97bo4b2o\$195bo
2bo64b2o\$198bo55b4o4b4o\$198bo54bo3bo4b2ob2o48b2o\$195bobo59bo6b2o17bo
29b2ob2o\$253bo2bo26bobo11b2o14b4o\$283b2o10b2ob2o14b2o\$295b4o\$296b2o2\$
268bobo18b4o14b2o\$269bo8bo9bo3bo12b2ob2o13b2o\$279b2o11bo12b4o13b4o\$
276b3o5b2o2bo2bo14b2o14b2ob2o\$253bo21b3o6b3o37b2o\$253bobo20b3o5b2o2bo
2bo\$253b2o24b2o11bo\$278bo9bo3bo4bo14b2o\$265b4o20b4o5b2o11bo2bo\$264bo3b
o28b2o7b3o13b2o\$260bo7bo36bo2bo8bo5b2o\$211bo43b7o2bo2bo37b2ob2o3bo3bo
4b2o\$210b3o41bo2b3ob2o29bo20bo4bo3bo\$210bob2o41b7o2bo2bo25b2o20bo\$211b
3o46bo7bo23b2o\$211b2o51bo3bo54b2o\$265b4o45b4o4b4o\$287bo18bo2bo3bo3bo4b
2ob2o\$288b2o20bo6bo6b2o\$287b2o17bo3bo2bo2bo\$226b3o12b2o28b2o23b2o9b4o\$
225bo2bo12b2o28b2o22b2o5b3o\$228bo62b3o6b2ob2o\$228bo55bo10b2o5b3o\$225bo
bo54b2o12b2o9b4o\$275b2o10b2o17bo3bo\$273b2ob2o8b4o20bo\$261b3o5bo3b4o9b
2ob2o15bo2bo\$258bo2b3o3b2obo3b2o12b2o\$258bobo6bo3bo\$258bo2b3o3b2obo3b
2o\$261b3o5bo3b4o\$273b2ob2o\$257bo17b2o22b2o\$256b2o26bo12b2ob2o\$256bobo
25bo8bo3b4o\$288b2o2bobo3b2o\$279b2o6bo2b2o3bo\$288b2o2bobo3b2o\$284bo8bo
3b4o\$284bo12b2ob2o\$299b2o\$377b2o5bo2bo\$287bo88b4o8bo\$286b2o16b4o68b2ob
2o3bo3bo\$286bobo14bo3bo70b2o5b4o\$307bo14b4o\$303bo2bo14bo3bo48bo\$325bo
47b2o\$300b3o18bo2bo47bob2o7b2o\$256b3o41bo71bobo7bo2b2o\$255bo2bo40b2o
71b2o3bo3b3o2bo\$258bo57b2o3b2o51bob3o2bo4bo\$258bo55bo6bobo57b5o\$255bob
o55bo2bo6bo58b2o\$312b2o7b3o\$313b2o46bobo20bo2bo\$361b2o25bo\$362bo3bo2bo
14bo3bo\$370bo14b4o\$315b2o5b4o40bo3bo\$313b2ob2o3bo3bo20bobo18b4o\$313b4o
8bo20b2o\$314b2o5bo2bo22bo28bo2bo\$362b2o16bo\$360b2ob2o11bo3bo\$331bobo
14b3o5bo3b4o13b4o13b4o\$331b2o12bo2b3o3b2obo3b2o30bo3bo\$332bo12bobo6bo
3bo14b2o22bo\$345bo2b3o3b2obo3b2o9bo20bo2bo\$348b3o5bo3b4o8bo\$316bobo41b
2ob2o6b2o\$316bobo19b2o22b2o24b2o3b2o\$317bo9bo8b2ob2o45bo6bobo\$325bobo
4bo3b4o27bo17bo2bo6bo\$324bo2bo5bo3b2o26bobo16b2o7b3o\$324bo6bo2bo31b2o
17b2o\$324bo2bo5bo3b2o\$325bobo4bo3b4o\$327bo8b2ob2o21bo\$286b3o49b2o20bob
o24b2o5b4o\$285bo2bo72b2o16b2o4b2ob2o3bo3bo\$288bo89b4o3b4o8bo\$288bo77bo
11b2ob2o3b2o5bo2bo\$285bobo29b2o28b2o8bo6b2obo3bo2bo5b2o\$317b2o28b2o6bo
bo4b5o4bo3bo\$356b2o4bo2bo4bo4b2o\$362b5o4bo3bo\$344bo2bo16b2obo3bo2bo5b
2o\$348bo17bo11b2ob2o\$331b2o11bo3bo9b4o16b4o\$333bo11b4o8bo3bo17b2o\$328b
o7b2o2b3o18bo\$327bo8b2o2b3o14bo2bo\$328bo7b2o2b3o\$333bo11b4o\$331b2o11bo
3bo19bo2bo\$348bo23bo\$344bo2bo12bo7bo3bo\$358b3o3bo4b4o\$334b3o21b2o5b2o\$
334bo22bo6b3o\$335bo22b2o5b2o\$358b3o3bo4b4o\$360bo7bo3bo\$349b3obo18bo\$
349b2o17bo2bo2\$377b2o\$375b2ob2o\$364b3o8b4o16b2o\$364bo11b2o15b2ob2o\$
365bo27b4o\$394b2o2\$382b2o\$376b3o3b2o9bo\$376b3o14b2o\$375bo3bo12bob2o\$
375b4o13bobo\$376b3o13b2o3\$384bo2bo\$388bo6b2o\$384bo3bo4b2ob2o\$385b4o4b
4o\$394b2o!``````
People have been building things like this for over twenty years. If the "rakes moving in the opposite direction" is really part of the requirement, I don't remember if there's an existing example, but it doesn't seem like it should be terribly difficult to cobble one together.

Gamedziner
Posts: 796
Joined: May 30th, 2016, 8:47 pm
Location: Milky Way Galaxy: Planet Earth

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

I do mean one that moves in the opposite direction.

Code: Select all

``````x = 81, y = 96, rule = LifeHistory
58.2A\$58.2A3\$59.2A17.2A\$59.2A17.2A3\$79.2A\$79.2A2\$57.A\$56.A\$56.3A4\$27.
A\$27.A.A\$27.2A21\$3.2A\$3.2A2.2A\$7.2A18\$7.2A\$7.2A2.2A\$11.2A11\$2A\$2A2.2A
\$4.2A18\$4.2A\$4.2A2.2A\$8.2A!
``````

dvgrn
Moderator
Posts: 6320
Joined: May 17th, 2009, 11:00 pm
Contact:

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

Gamedziner wrote:I do mean one that moves in the opposite direction.
Okay. I've very seldom built any kind of complex rake or breeder, but here's at least a possible way to tackle the problem. Maybe the following will encourage some rake expert to chime in and set the record straight.

The rake breeder I quoted uses all backward p60 rakes, plus some block puffers to start things off. You can use some of the same construction recipes to build rakes that travel west instead of north -- but you'll have to use both forerakes and backrakes as well as block puffers. Or you could make blocks by colliding forward and backward gliders, but I think that might be overkill. Let's see how it goes.

Those long backrakes with the p20 streams thinned out by multiple Schick engines are terribly last century -- last millenium, even. Also, period 60 may be too fast, given that the output rakes will be running away backwards. Let's try using rakes from Jason Summers' jslife collection. We want to build a rake moving in this direction:

Code: Select all

``````x = 40, y = 19, rule = B3/S23
35b4o\$19bo2bo12bo3bo\$18bo16bo\$18bo3bo13bo2bo\$18b4o3\$obo16bo2bo\$b2o15bo
\$bo16bo3bo\$18b4o\$8bo\$8bobo\$8b2o2\$19bo2bo5b2o\$18bo8b4o\$18bo3bo3b2ob2o\$
18b4o5b2o!``````
So let's see if p60 rakes can handle doing the necessary constructions:

Code: Select all

``````x = 140, y = 61, rule = LifeHistory
50.2A66.A2.A\$49.4A69.A\$49.2A.2A64.A3.A\$51.2A15.2A49.4A13.4A\$66.2A.2A
64.A3.A\$66.4A69.A\$67.2A33.6A27.A2.A\$101.A5.A\$55.2A50.A11.A4.2A\$40.A.A
6.3A3.2A9.A34.A4.A4.A6.A.A3.2A9.2A\$41.2A6.3A14.2A35.2A4.A.A5.A3.A12.A
2.A\$41.A6.A3.A12.A.2A41.2A5.A3.A12.A2.A\$48.4A13.A.A49.A3.A11.2A.2A\$
49.3A13.2A50.A2.A13.2A\$25.3A7.A.A68.A12.A\$24.5A7.2A66.A.A\$24.3A.2A6.A
20.A2.A44.2A\$27.2A32.A6.2A28.2A18.A2.A7.2A5.4A\$57.A3.A4.2A.2A27.A.A
21.A4.2A.2A3.A3.A\$30.A.A18.4A3.4A4.4A31.A16.A3.A4.4A8.A\$23.2A6.2A17.A
3.A12.2A29.A2.A6.2A9.4A5.2A5.A2.A\$31.A14.A7.A40.3A9.2A5.3A\$41.7A2.A2.
A41.A7.3A6.2A.2A\$40.A2.3A.2A47.A3.A6.2A5.3A\$41.7A2.A2.A43.3A8.2A9.4A\$
46.A7.A63.A3.A\$50.A3.A67.A\$51.4A63.A2.A4\$15.D.D\$13.D5.D2\$12.D2.A.A2.D
\$16.2A\$12.D3.A3.D2\$13.D5.D33.A\$15.D.D35.A.A\$53.2A2\$35.4A\$19.A2.A12.A
3.A\$18.A16.A\$18.A3.A13.A2.A\$18.4A3\$A.A16.A2.A\$.2A15.A\$.A16.A3.A\$18.4A
\$8.A\$8.A.A\$8.2A2\$19.A2.A5.2A\$18.A8.4A\$18.A3.A3.2A.2A\$18.4A5.2A!``````
Nope -- one problematic glider is circled in red. How about p120?

Code: Select all

``````x = 400, y = 112, rule = B3/S23
116b4o\$115b6o\$115b4ob2o\$119b2o2\$130b2o\$129b4o\$129b2ob2o\$120b3ob2o5b2o\$
75bo43b2o5bo\$73bo3bo40bo7b2o\$78bo28bo11b2o5bo\$73bo4bo28bobo10b3ob2o5b
2o\$74b5o28b2o20b2ob2o\$129b4o\$130b2o\$115b6o\$89bo24bo5bo\$89bobo28bo\$82bo
6b2o23bo4bo\$81b2o33b2o\$81bobo2\$71bo36b4o\$71bobo23bo9bo3bo\$71b2o23b2o
13bo14b4o\$96bobo8bo2bo14bo3bo\$129bo\$125bo2bo2\$109bo4b2o\$108bobo3b2o9b
2o\$107bo3bo12bo2bo\$56b3o48bo3bo12bo2bo\$55b5o47bo3bo11b2ob2o\$55b3ob2o
46bo2bo13b2o\$58b2o49bo3\$119b2o5b4o\$60bobo54b2ob2o3bo3bo\$61b2o54b4o8bo\$
61bo56b2o5bo2bo7\$141b5o\$140bo4bo18bo2bo\$145bo22bo6b2o\$140bo3bo19bo3bo
4b2ob2o\$142bo22b4o4b4o\$152b3o4bo14b2o\$152b2o4bobo\$117b2o31b2ob2o3bobo
5bo\$113b4ob2o30bo13bo4bo3bo\$113b6o31b2o3b2o7bo3bo4b2o\$114b4o34b4o7bo4b
o5b2o\$154bo8b2o8b2o2\$130b2o\$130b4o\$129bo3bo\$130bo16b4o12b5o7b2o\$129bo
16bo3bo11bo4bo5b2ob2o\$129bob2o4bo4bo7bo16bo5b4o\$128bo4b2o2b7o2bo2bo12b
o3bo7b2o\$130b2o3b2o2b3ob2o19bo\$30bobo102bo2b6o2bo2bo\$31b2o102bo6bo7bo\$
31bo114bo3bo\$147b4o\$98bo\$98bobo\$98b2o17\$35b4o116b4o116b4o116b4o\$19bo2b
o12bo3bo99bo2bo12bo3bo99bo2bo12bo3bo99bo2bo12bo3bo\$18bo16bo102bo16bo
102bo16bo102bo16bo\$18bo3bo13bo2bo98bo3bo13bo2bo98bo3bo13bo2bo98bo3bo
13bo2bo\$18b4o116b4o116b4o116b4o3\$obo16bo2bo116bo2bo116bo2bo116bo2bo\$b
2o15bo119bo119bo119bo\$bo16bo3bo115bo3bo115bo3bo115bo3bo\$18b4o116b4o
116b4o116b4o\$8bo\$8bobo\$8b2o2\$19bo2bo5b2o109bo2bo5b2o109bo2bo5b2o109bo
2bo5b2o\$18bo8b4o107bo8b4o107bo8b4o107bo8b4o\$18bo3bo3b2ob2o107bo3bo3b2o
b2o107bo3bo3b2ob2o107bo3bo3b2ob2o\$18b4o5b2o109b4o5b2o109b4o5b2o109b4o
5b2o!``````
Good, no collision troubles this time. We could probably find a shorter period that would work just as well, but p120 has reasonable sized rakes so let's just go with that. So maybe the next step is to locate a reasonable p120 block puffer. I tried adding an HWSS to a p120 backrake and came up with this:

Code: Select all

``````x = 72, y = 32, rule = B3/S23
b6o\$o5bo\$6bo\$o4bo\$2b2o\$42b2o\$41b4o\$4b2o23bo11b2ob2o\$3b2o22b2obo3bo2bo
5b2o\$5bo19b5o4bo3bo\$25bo2bo4bo4b2o\$25b5o4bo3bo28bo2bo\$27b2obo3bo2bo5b
2o15b2o9bo\$29bo11b2ob2o11b3ob2o4bo3bo\$41b4o12b5o6b4o\$42b2o14b3o2\$34b2o
\$33b2o31b2o\$9b2o24bo19b2o8bo2b2o\$7bo4bo42b3o6b3o2bo\$13bo38bo2bobo6bo4b
o\$7bo5bo38b2o2bo7b5o\$8b6o51b2o2\$60b2o5bo2bo\$59b4o8bo\$59b2ob2o3bo3bo\$
38b2o21b2o5b4o\$35b3ob2o\$35b5o\$36b3o!``````
Having a block sitting around for a long time in a spaceship lane will probably be a problem, especially when two spaceships have to follow each other closely. We might need different recipes for those cases -- build a block from one side with two gliders, maybe, and then immediately hit it with two more gliders to make the LWSS. But at least for the first, central LWSS stream we can use the block puffer plus two gliders:

Code: Select all

``````x = 862, y = 190, rule = B3/S23
152b2o\$150bo4bo\$156bo\$150bo5bo\$151b6o2\$164bo2bo\$168bo\$153bo10bo3bo\$
154b2o9b4o\$153b2o5b3o\$149b3o6b2ob2o\$112b2o36b2ob2o5b3o\$109b3ob2o25bo
13b2o9b4o\$109b5o24b2o24bo3bo\$110b3o26b2o27bo\$151b4o9bo2bo\$150b6o\$150b
4ob2o\$122bo31b2o\$120b2o\$121bobo2\$121b2o21b2o\$114bo7bo20b4o\$112bobo28b
2ob2o14b2o\$113b2o30b2o14b4o\$137b2o22b2ob2o\$137bobo23b2o\$137bo\$159bo\$
157bo\$153bo3bo2b2o\$92bo56bo2b3obo5bo\$90bo3bo53bob5o2bobo2b2o\$95bo51b2o
b2o5bo3b2o\$90bo4bo52bo2bo7b3o\$91b5o\$149b2o\$162b2o\$153b4o4b4o\$152bo3bo
4b2ob2o\$156bo6b2o\$152bo2bo6\$177b3o\$176b5o\$176b3ob2o\$179b2o21b2o5b4o\$
200b2ob2o3bo3bo\$84bo115b4o8bo\$82bobo93bo22b2o5bo2bo\$83b2o93b2o\$149b6o
23b2o19bo\$148bo5bo30bo12b2o8b2o\$154bo28b2o12bo9bo2bo\$148bo4bo30b2o12b
5o4bo2bo\$150b2o47b4o3b2ob2o\$202bo4b2o3\$183b2o14b3o\$182b4o12b5o6b4o\$
172bo9b2ob2o11b3ob2o4bo3bo\$172bo11b2o15b2o9bo\$168bo2b2o4bobo28bo2bo\$
168bo7bo2b2o\$168bo2b2o4bobo\$172bo11b2o\$172bo9b2ob2o\$182b4o\$183b2o9\$54b
o\$52bobo\$53b2o2\$95bo\$93b2o\$94b2o3\$19b2o118b2o118b2o118b2o118b2o118b2o\$
18b4o116b4o116b4o116b4o116b4o116b4o\$17b2ob2o115b2ob2o115b2ob2o115b2ob
2o115b2ob2o115b2ob2o\$b2o15b2o101b2o15b2o101b2o15b2o101b2o15b2o101b2o
15b2o101b2o15b2o\$2ob2o115b2ob2o115b2ob2o115b2ob2o115b2ob2o115b2ob2o\$b
4o116b4o116b4o116b4o116b4o116b4o\$2b2o118b2o118b2o118b2o118b2o118b2o\$
791b6o\$790bo5bo\$4b4o3bobo107b2o118b2o118b2o118b2o118b2o193bo\$3b2o2bo2b
o4bo104b2ob2o115b2ob2o115b2ob2o115b2ob2o115b2ob2o70b2o58b2o53bo4bo\$2b
2o2bo4bo3bo105b4o116b4o116b4o116b4o116b4o70b2o58b2o55b2o\$3bo2bo5bo3bo
105b2o118b2o118b2o118b2o118b2o228b2o\$4b2o8b2o815b4o\$14b2o805bo9b2ob2o\$
797b2o22bo11b2o\$10bo2bo116bo2bo116bo2bo116bo2bo116bo2bo116bo2bo182b2o
19bo2b2o4bobo\$b2o6bo111b2o6bo111b2o6bo111b2o6bo111b2o6bo111b2o6bo188bo
18bo7bo2b2o\$2ob2o4bo3bo106b2ob2o4bo3bo106b2ob2o4bo3bo106b2ob2o4bo3bo
106b2ob2o4bo3bo106b2ob2o4bo3bo203bo2b2o4bobo28bo2bo\$b4o4b4o108b4o4b4o
108b4o4b4o108b4o4b4o108b4o4b4o108b4o4b4o208bo11b2o15b2o9bo\$2b2o118b2o
118b2o118b2o118b2o118b2o217bo9b2ob2o11b3ob2o4bo3bo\$831b4o12b5o6b4o\$
700b2o130b2o14b3o\$699b4o\$689bo9b2ob2o\$689bo11b2o124b2o13bo\$685bo2b2o4b
obo102b2o25b2o13b2o4b2o8b3o\$685bo7bo2b2o99bo4bo25bo11bob3ob2o11bo\$685b
o2b2o4bobo28bo2bo74bo36b2obob4o3b2o3bobo\$689bo11b2o15b2o9bo67bo5bo39bo
bo3bo7b2o\$689bo9b2ob2o11b3ob2o4bo3bo68b6o40bo\$699b4o12b5o6b4o\$700b2o
14b3o131b2o5bo2bo\$849b4o8bo\$647b3o199b2ob2o3bo3bo\$649bo69bo4b2o102b2o
21b2o5b4o\$648bo18b2o47b4o3b2ob2o97b3ob2o\$665bo4bo30b2o12b5o4bo2bo97b5o
\$671bo28b2o12bo9bo2bo98b3o\$665bo5bo30bo12b2o8b2o\$666b6o23b2o19bo\$695b
2o\$695bo22b2o5bo2bo\$717b4o8bo\$717b2ob2o3bo3bo\$696b2o21b2o5b4o\$693b3ob
2o\$693b5o\$694b3o7\$735b2o\$726b4o4b4o\$725bo3bo4b2ob2o\$729bo6b2o\$665bo59b
o2bo\$663bo3bo\$668bo\$663bo4bo57b2o\$664b5o57bo7b2o\$677b3o46bo2bo5b2o\$
679bo47b3o4b2o\$678bo34bo15b2o3bo\$713bo\$713bobo\$714bo20b2o\$714bo19b4o\$
717b2o15b2ob2o\$700bo15b4o16b2o\$699bo16b2ob2o\$699b3o16b2o4\$724b4o\$723b
6o\$705bo17b4ob2o\$704b2o21b2o\$704bobo\$738b4o\$685b2o50bo3bo\$682b3ob2o53b
o\$682b5o36bo9b2o2bo2bo\$683b3o36b2o9b3o\$722bobo8b2o2bo2bo\$741bo\$737bo3b
o\$738b4o\$725b2o\$723bo4bo\$729bo\$723bo5bo\$724b6o!``````
So far so good. Just four more LWSSes to build, two from each side presumably.

It looks like the one-sided insertion mechanism in the space-rake maker that toroidalet found can just barely build an LWSS as close in front of an existing LWSS as we're going to need for the tightest-packed pair of spaceships in the space rake:

Code: Select all

``````x = 62, y = 22, rule = B3/S23
57b4o\$57bo3bo\$57bo\$58bo2bo\$23b2o\$22b2o\$15bo8bo\$15b2o\$14bobo8\$b2o\$obo\$
2bo\$38b2o\$37b2o\$39bo!``````
But maybe it would be good to go have a close look at that space-rake maker. It actually builds the LWSSes in a very different order that what I've outlined here, creating an ecologist first and then adding the final spaceship afterwards that turns it into a space rake. So there are a couple of LWSSes that will need four synchronized gliders to build using the above outline, where they might only need three gliders apiece with a different build order.

Anyone else care to contribute to (or complete) this interesting experiment?

wildmyron
Posts: 1347
Joined: August 9th, 2013, 12:45 am

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

Here is an almost entirely unoptimised solution. I went with the original synthesis method (although in a different order) because getting the B in place simultaneously with an LWSS to stablisie it seemed far to tricky with the available rakes. Some of the rakes are altered to allow them to be packed in closer together, aside from that I went with a fairly naive construction.

Code: Select all

``````x = 663, y = 262, rule = B3/S23
623b2o\$619b4ob2o\$619b6o\$620b4o2\$635b2o\$633b2ob2o\$619bo9bo3b4o\$618bo11b
o3b2o\$618b3o7bo2bo\$578b5o47bo3b2o\$577bo4bo46bo3b4o\$582bo50b2ob2o\$577bo
3bo19bo18b2o13b2o\$579bo20bo17bo4bo\$600b3o21bo\$618bo5bo\$619b6o4\$611bo2b
o\$596b2o17bo\$249b6o340b2o14bo3bo13bo2bo\$248bo5bo342bo14b4o17bo\$254bo
374bo3bo\$248bo4bo376b4o\$250b2o357b3o\$263b4o\$262bo3bo341bo2bo14b2o\$258b
o7bo306bo34bobo18bo\$253b7o2bo2bo308b2o48b2o4b2o\$208b3o41bo2b3ob2o312b
2o48b2o6bo\$207b5o29bobo9b7o2bo2bo296b2o58b2o7bo\$207b3ob2o28b2o15bo7bo
292b3ob2o58bo3bo2bo\$210b2o30bo19bo3bo292b5o64bo\$263b4o293b3o\$622b2o5bo
2bo\$252b2o367b4o8bo\$223bobo22b4ob2o366b2ob2o3bo3bo\$223b2o23b6o369b2o5b
4o\$224bo24b4o2\$483b6o\$221b3o160b4o94bo5bo\$221bo21b2o138b6o99bo159b2o\$
222bo18b2ob2o137b4ob2o92bo4bo156b4ob2o\$241b4o16b2o124b2o95b2o158b6o\$
237bo4b2o15b2ob2o233b4o144b4o\$207bo28bobo20b4o135b2o96bo3bo\$208bo26bo
24b2o135b4o84b3o4bo7bo159b2o\$206b3o28b2o158b2ob2o82b10o2bo2bo158b2ob2o
\$390bo2bo5b2o41b3o40bo3b3ob2o149bo9bo3b4o\$250bobo3b4o83bo46bo3bo46b5o
42b6o2bo2bo143bo11bo3b2o\$248bo4bo2bo2b2o80bo3bo32bo10bo4b2o45b3ob2o45b
o7bo142b3o7bo2bo\$248bo3bo4bo2b2o84bo31bobo9bo3bo49b2o50bo3bo102b5o47bo
3b2o\$189b5o53bo3bo5bo2bo80bo4bo31b2o10bo2bo5b2o65bobo28b4o101bo4bo46bo
3b4o\$188bo4bo54b2o8b2o82b5o50b2ob2o64b2o139bo50b2ob2o\$193bo54b2o147b4o
66bo18b2o114bo3bo19bo18b2o13b2o\$188bo3bo205b2o82b4ob2o115bo20bo17bo4bo
\$190bo59bo2bo106bo22b6o93b6o55bo81b3o21bo\$254bo6b2o97bobo19bo5bo94b4o
57b2o97bo5bo\$250bo3bo4b2ob2o96b2o26bo59bobo92b2o99b6o\$251b4o4b4o119bo
4bo60b2o2b3o\$260b2o122b2o63bo2bo\$453bo23b2o\$359bo115b2ob2o156bo2bo\$
358b2o16b4o95b4o16b2o143bo\$358bobo14bo3bo50bobo34b3o6b2o15b2ob2o126b2o
10bo3bo13bo2bo\$379bo14b4o32b2o35bo25b4o107bo18b2o12b4o17bo\$279b5o91bo
2bo14bo3bo33bo36bo25b2o109b2o18bo28bo3bo\$278bo4bo18bo2bo35bobo53bo206b
2o49b4o\$283bo22bo6b2o27b2o28b3o18bo2bo87bo3bo\$278bo3bo19bo3bo4b2ob2o
26bo29bo111b2o5b3o\$280bo22b4o4b4o56b2o106b2o9bob3o141b3o3b2o\$312b2o74b
2o3b2o83bo6bo8b2o139bo3bo2b2o9b2o\$386bo6bobo27b5o49bo3bo3b8obo139bo5bo
11bo2b2o\$255b2o49bo17b3o58bo2bo6bo26bo4bo50bo3bo7b4o146bo10b3o2bo\$251b
4ob2o39b2o6bo3b3o11b5o56b2o7b3o31bo54bo8bo95b2o45bo5bo10bo4bo\$177bo73b
6o40bob2o3bo3bob3o10b3ob2o56b2o35bo3bo157b3ob2o46bob2o11b5o\$178bo73b4o
43b2o4bo6b2o12b2o96bo59bo2bo96b5o63b2o\$176b3o120bo6b5obo175bo6b2o88b3o
\$275bo32b4o172bo3bo4b2ob2o149b2o5bo2bo\$275bobo31bo77b2o5b4o87b4o4b4o
149b4o8bo\$75b3o197b2o108b2ob2o3bo3bo96b2o150b2ob2o3bo3bo\$74b5o306b4o8b
o54b3o193b2o5b4o\$74b3ob2o205b4o12b5o7b2o71b2o5bo2bo54b5o\$77b2o21b2o5b
4o162bo10bo3bo11bo4bo5b2ob2o135b3ob2o\$98b2ob2o3bo3bo161bobo4b2o7bo16bo
5b4o139b2o21b2o5b4o121b5o\$98b4o8bo159b2o2bo3b4o2bo2bo12bo3bo7b2o161b2o
b2o3bo3bo120bo4bo18bo2bo\$99b2o5bo2bo158b2obo5bo3b2o19bo117bo54b4o8bo
25bo99bo22bo6b2o\$270b2o2bo3b4o2bo2bo133bo44bo9b2o5bo2bo27b2o92bo3bo19b
o3bo4b2ob2o\$47b6o52bo166bobo4b2o7bo118b6o6b3o42b4ob3o41b2o95bo22b4o4b
4o\$46bo5bo39b3o5bo3bo2bo165bo10bo3bo117bo5bo16b3o31bo3b5o10bo159b2o\$
52bo39bo2bo3b2o7bo176b4o123bo15b5o30b3o7bo8b3o85b2o\$46bo4bo48b2o6bo
297bo4bo16b3ob2o30bo2b3o5bo5bo3bo80b4ob2o53bo\$48b2o44b2o5b2o4b2o290b5o
4b2o10bo10b2o33bob2o6b5o4bo80b6o14b5o31bo4bob2o7b4o\$71bo34bo291bo4bo
15bob2o44b5o4b5obob2o81b4o14bo4bo35bo4bo6bo2b2o\$44bo24b2o32b2o298bo14b
o3bo45b3o2b2o3b2o3bo77b2o27bo34bo4bo8bo2b2o\$42b4o24b2o326bo3bo15b2o60b
obo75b3ob2o10bo10bo3bo18bo13b2o5b2o8bo2bo\$41b2o38b2o14b3o300bo157b5o
12b2o10bo20bobo29b2o\$41bo3bo34b4o12b5o6b4o200bobo144b2o14b3o82b3o12b2o
32b2o\$42b4o24bo9b2ob2o11b3ob2o4bo3bo201b2o101b2o4b2o2bo31b4o12b5o6b4o\$
43bo26bo11b2o15b2o9bo201bo102b2o4bo2bo18b3o11b2ob2o11b3ob2o4bo3bo71bo\$
50b2o14bo2b2o4bobo28bo2bo314bo23b3ob2o5b2o15b2o9bo70bo56b4o12b5o7b2o\$
47b2ob2o14bo7bo2b2o342bobo23b2o5bo28bo2bo72bo44bo9bo3bo11bo4bo5b2ob2o\$
48bobo15bo2b2o4bobo342bobo23bo7b2o149b2o11bo16bo5b4o\$49bo20bo11b2o336b
o2bo23b2o5bo147b3o5b2o2bo2bo12bo3bo7b2o\$70bo9b2ob2o336b2o25b3ob2o5b2o
140b3o6b3o19bo\$80b4o63bo309b2ob2o140b3o5b2o2bo2bo\$81b2o65bo308b4o144b
2o11bo\$146b3o309b2o144bo9bo3bo\$185bo429b4o\$185bobo\$185b2o\$26bo2bo116bo
2bo116bo2bo116bo2bo116bo2bo\$17b2o6bo111b2o6bo111b2o6bo111b2o6bo119bo\$
11bo4b2ob2o4bo3bo106b2ob2o4bo3bo106b2ob2o4bo3bo106b2ob2o4bo3bo115bo3bo
\$9b2o6b4o4b4o108b4o4b4o108b4o4b4o108b4o4b4o116b4o\$10b2o6b2o118b2o118b
2o118b2o\$483bo134bo2bo\$bo482b2o136bo6b2o\$b2o480b2o133bo3bo4b2ob2o\$obo
616b4o4b4o\$17b2o118b2o118b2o369b2o\$16b2ob2o115b2ob2o115b2ob2o\$17b4o
116b4o116b4o296b5o60bo\$18b2o118b2o118b2o296bo4bo59bo3b3o\$561bo58bo3bob
3o\$556bo3bo60bo6b2o\$17b2o539bo48bo14b5obo\$16b2ob2o14b2o70b2o46b2o118b
2o118b2o209bo6bo10b4o\$17b4o13b4o69b2o45b4o116b4o116b4o208bob2o3bo11bo\$
18b2o13b2ob2o115b2ob2o115b2ob2o115b2ob2o209b3o\$34b2o118b2o118b2o118b2o
180b2o30bo\$575bobo51b2o\$577bo49b2ob2o\$529b2o63bo16b2o14b4o\$528b4o62bob
o12b2ob2o14b2o\$374b2o142bo9b2ob2o61b2o13b4o\$372b2ob2o141bo11b2o78b2o\$
360b3o5bo3b4o138bo2b2o4bobo\$357bo2b3o3b2obo3b2o139bo7bo2b2o\$357bobo6bo
3bo50b2o58b3o19b2o9bo2b2o4bobo28bo2bo\$357bo2b3o3b2obo3b2o14b3o30b2o59b
o18b2o14bo11b2o15b2o9bo61b2o\$360b3o5bo3b4o12b5o6b4o18bo60bo21bo13bo9b
2ob2o11b3ob2o4bo3bo37b2o18b4ob2o\$310b2o43bo16b2ob2o11b3ob2o4bo3bo125b
4o12b5o6b4o36b2o19b6o\$87b3o219bobo42b2o18b2o15b2o9bo126b2o14b3o49bo19b
4o9bo2bo\$89bo221bo42bobo41bo2bo71bo102b3o55bo\$88bo382bo3bo75b2o22b5o
50bo3bo\$125b2o270bo78bo77bo20b3ob2o50b4o\$31bo92b2o258bo11bo2bo71bo4bo
72b2o4b2o21b2o34b2o10b3o\$31b2o93bo262b2o9bo71b5o4b2o19b2o44b2o6bo56b2o
9b2ob2o\$30bobo346b3o7bo2b2o6bo78bo4bo14b3ob2o27b2o13b2o7bo58bo10b3o\$
339b6o32b2o2bo8b5o4b2o84bo13b5o25bo2b2obo5bo6bo3bo2bo75b4o\$338bo5bo31b
2obo2bo8b3o4bo80bo5bo14b3o23bob2o2bobo6bo11bo76bo3bo\$344bo32bo7b2o8b2o
83b6o40b2ob2ob2o100bo\$338bo4bo34b2obo2b3o143b3o14b2o5bo2bo72bo2bo\$340b
2o37b2o149b3o13b4o8bo\$392b2o5b4o143b2ob2o3bo3bo58b6o\$367b3o20b2ob2o3bo
3bo122b2o21b2o5b4o57bo5bo\$366b5o19b4o8bo119b3ob2o94bo\$366b3ob2o19b2o5b
o2bo120b5o89bo4bo\$369b2o152b3o92b2o\$569b2o\$560b4o4b4o\$559bo3bo4b2ob2o\$
563bo6b2o\$499bo59bo2bo\$497bo3bo\$502bo\$497bo4bo57b2o\$392bo2bo102b5o57bo
7b2o\$396bo6b2o46b2o58b3o46bo2bo5b2o\$392bo3bo4b2ob2o46b2o59bo47b3o4b2o\$
393b4o4b4o46bo60bo34bo15b2o3bo\$340b2o60b2o143bo\$117b3o219bobo205bobo\$
119bo211b5o5bo54bo151bo20b2o\$118bo211bo4bo59bo3b3o146bo19b4o\$215b2o
118bo58bo3bob3o148b2o15b2ob2o\$61bo152b2o114bo3bo60bo6b2o130bo15b4o16b
2o\$61b2o153bo115bo48bo14b5obo130bo16b2ob2o\$60bobo317bo6bo10b4o131b3o
16b2o\$191b2o187bob2o3bo11bo\$182b4o4b4o187b3o\$181bo3bo4b2ob2o187bo\$185b
o6b2o209b2o153b4o\$121bo59bo2bo216b2ob2o151b6o\$119bo3bo162b2o80bo16b2o
14b4o134bo17b4ob2o\$124bo54b2o104b4o79bobo12b2ob2o14b2o134b2o21b2o\$119b
o4bo54b2o8b2o84bo9b2ob2o78b2o13b4o151bobo\$120b5o53bo3bo5bo2bo62bo20bo
11b2o95b2o186b4o\$179bo3bo4bo2b2o60bobo15bo2b2o4bobo75b2o159b2o50bo3bo\$
179bo4bo2bo2b2o60b2ob2o14bo7bo2b2o69bo3b2o157b3ob2o53bo\$181bobo3b4o64b
2o14bo2b2o4bobo28bo2bo38bobo3bo156b5o36bo9b2o2bo2bo\$248bo26bo11b2o15b
2o9bo37b2o39b2o121b3o36b2o9b3o\$168b2o77b4o24bo9b2ob2o11b3ob2o4bo3bo74b
4ob2o159bobo8b2o2bo2bo\$166bo24b2o53bo3bo34b4o12b5o6b4o74b6o179bo\$131bo
35bobo20b4o52b2o38b2o14b3o71b2o13b4o9bo2bo163bo3bo\$130b2o36bo4b2o15b2o
b2o52b4o24b2o73b3o22b2o31bo163b4o\$130bobo39b4o16b2o55bo24b2o32b2o39b5o
23bo26bo3bo150b2o\$153bo18b2ob2o99bo34bo37b3ob2o50b4o148bo4bo\$152bo21b
2o77b2o44b2o5b2o4b2o38b2o42b2o2b3o78b2o80bo\$152b3o96bo4bo48b2o6bo74b2o
2b2o2b2o2b3o79b2o73bo5bo\$149bo107bo39bo2bo3b2o7bo80bob2o2b3o78bo76b6o\$
148b2o101bo5bo39b3o5bo3bo2bo79b2o11b4o\$138bo9bobo29b4o68b6o52bo93bo3bo
\$137bo41b6o223bo\$137b3o39b4ob2o118b2o5bo2bo89bo2bo\$138b2o43b2o118b4o8b
o230b2o5b4o\$91bo75bo135b2ob2o3bo3bo75b6o147b2ob2o3bo3bo\$91b2o73b2o26b
4o84b2o21b2o5b4o74bo5bo147b4o8bo\$90bobo48b2o23bobo11bo12bo3bo81b3ob2o
111bo148b2o5bo2bo\$138b3ob2o39bo4b2o7bo81b5o106bo4bo87b3o\$138b5o36bo3bo
3b4o2bo2bo83b3o109b2o88b5o64bo\$139b3o35bobo6bo3b2o290b3ob2o58bo3bo2bo\$
178bo3b2o3b4o2bo2bo288b2o58b2o7bo\$181bobo4b2o7bo348b2o6bo\$156b2o5bo2bo
26bo3bo349b2o4b2o\$155b4o8bo26b4o333bobo18bo\$155b2ob2o3bo3bo13b2o348bo
2bo14b2o\$157b2o5b4o11bo4bo\$185bo346b3o\$153bo25bo5bo367b4o\$96b2o54b2o
26b6o366bo3bo\$93b3ob2o52bob2o7b2o332b3o21bo14b4o17bo\$93b5o53bobo7bo2b
2o330bo21b2o14bo3bo13bo2bo\$94b3o54b2o3bo3b3o2bo331bo21b2o17bo\$153bob3o
2bo4bo368bo2bo\$160b5o\$161b2o342bo\$503b2o9b3o\$140bobo20bo2bo337b2o8bo
27b6o\$103b2o35b2o25bo347bo25bo5bo\$103bobo35bo3bo2bo14bo3bo379bo\$103bo
45bo14b4o334bo38bo4bo\$145bo3bo350bo3bo38b2o13b2o\$125bobo18b4o355bo26b
3o12bo8b2ob2o\$125b2o373bo4bo26bo12bobo4bo3b4o\$121b2o3bo374b5o27bo10bo
2bo5bo3b2o\$121bobo30b2o388bo6bo2bo\$121bo30bo4bo386bo2bo5bo3b2o\$110bobo
45bo386bobo4bo3b4o\$110bobo39bo5bo388bo8b2ob2o\$110bobo40b6o399b2o\$139b
2o27b2o\$139bobo25b4o372b4o\$112b5o22bo27b2ob2o370b6o\$111bo4bo43bo2bo5b
2o371b4ob2o\$116bo34bo8bo3bo381b2o\$111bo3bo36bo2b2o2bo4b2o\$113bo37bo3b
2o3bo3bo\$156bo3bo2bo5b2o\$167b2ob2o\$167b4o\$168b2o2\$157b2o\$153b4ob2o\$
153b6o\$154b4o!``````
The latest version of the 5S Project contains over 226,000 spaceships. There is also a GitHub mirror of the collection. Tabulated pages up to period 160 (out of date) are available on the LifeWiki.

simsim314
Posts: 1734
Joined: February 10th, 2014, 1:27 pm

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

Now we could ask, can we make a Rake of rakes of rakes, or more general can we make something relatively simple that shoots Rake^N ? Probably something recursive...

muzik
Posts: 3774
Joined: January 28th, 2016, 2:47 pm
Location: Scotland

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

That would be cubic growth, which isn't very possible in a 2D automata like this.
Bored of using the Moore neighbourhood for everything? Introducing the Range-2 von Neumann isotropic non-totalistic rulespace!

dvgrn
Moderator
Posts: 6320
Joined: May 17th, 2009, 11:00 pm
Contact:

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

simsim314 wrote:Now we could ask, can we make a Rake of rakes of rakes, or more general can we make something relatively simple that shoots Rake^N ? Probably something recursive...
This idea has come up a couple of times recently. Rake^(N+1)s are really painfully exponentially harder to build than rake^N's, especially above N=2 where you either have rake outputs crashing into each other, or getting suppressed, or you have to build in some kind of rake-thinning mechanism at each level as Calcyman mentioned. So this looks to me like a challenge that's very much worth avoiding...!

muzik
Posts: 3774
Joined: January 28th, 2016, 2:47 pm
Location: Scotland

### Re: Challenge: Moving Rake Gun (AKA Rake Rake)

Unless you can get some sort of moving caber tosser type growth of course, a concept which does not seem very search-friendly.
Bored of using the Moore neighbourhood for everything? Introducing the Range-2 von Neumann isotropic non-totalistic rulespace!