Glider Destruction Of Still Lives, Oscillators, Etc.

ColorfulGalaxy · Post by **ColorfulGalaxy** » July 29th, 2020, 12:44 am

There's a lot of topics about glider constructions, but I couldn't find a topic that
generally discusses glider destructions.

NOTE: For glider destruction, I mean the ones that leaves completely nothing.

1 glider to destruct a block:

Code: Select all

x = 2, y = 2, rule = LifeHistory
2A$2A5$6.3C$6.C$7.C!

1 glider to destruct a boat:

Code: Select all

x = 0, y = 0, rule = LifeHistory
2A$A.A$.A4$6.3A$6.A$7.A!

1 glider to destruct a ship:

Code: Select all

x = 3, y = 3, rule = LifeHistory
.2A$A.A$2A4$6.3A$6.A$7.A!

1 glider to destruct a toad:

Code: Select all

x = 4, y = 4, rule = LifeHistory
.2A$3.A$A$.2A4$6.3C$6.C$7.C!

CHALLENGES: Find the smallest number of gliders to destruct:

An arbitrarily but finitely long stream of gliders
An arbitrarily long canoe or snake
A Gosper Glider Gun, along with all the gliders it produced
A Galaxy
A Pentadecathlon
A French Kiss
An arbitrarily long barberpole
A blockade
A BLSE, along with all the blocks it left behind
An interchange
The ash of a 33-cell row, like this:
Code: Select all
```
x = 0, y = 0, rule = B3/S23
33o!
```
The ash of the R-pentomino, including the escaping gliders
An Ecologist
A brain

Additional Tasks： Destruct a pattern with:

Three or less salvos of gliders
Only one salvo of gliders
Gliders from only one lane

PkmnQ · Post by **PkmnQ** » July 29th, 2020, 4:55 am

For the canoe/snake, it can obviously be done in 2. One to remove the pre-block, and one to remove the remaining block.

yujh · Post by **yujh** » July 29th, 2020, 5:15 am

PkmnQ wrote: ↑
July 29th, 2020, 4:55 am
For the canoe/snake, it can obviously be done in 2. One to remove the pre-block, and one to remove the remaining block.

Nope, only one for snake(at least itself)
galaxy,1
pd,1

ColorfulGalaxy · Post by **ColorfulGalaxy** » July 29th, 2020, 5:49 am

1 glider to destruct 2 blinkers in a row:

Code: Select all

x = 5, y = 3, rule = LifeHistory
A3.A$A3.A$A3.A7$6.3C$6.C$7.C!

1 glider to destruct a Bi-block:

Code: Select all

x = 5, y = 2, rule = LifeHistory
2A.2A$2A.2A8$9.3C$9.C$10.C!

1 glider to destruct a pentadecathlon: (Can you find another way to destruct a pentadecathlon with 1 glider?)

Code: Select all

x = 0, y = 0, rule = LifeHistory
5.A4.A$3.2A.4A.2A$5.A4.A21$26.3C$26.C$27.C!

2 gliders to destruct a beacon: (Can you find a way using 1 glider?)

Code: Select all

x = 4, y = 4, rule = LifeHistory
.C$2.C$3C5$7.2A$7.A$10.A$9.2A9$19.3C$19.C$20.C!

2 gliders to destruct a traffic light: (Can you find a way using 1 glider?)

Code: Select all

x = 0, y = 0, rule = LifeHistory
BC$.BC$3C$3.B$4.B$5.B$6.B$7.B$8.B3.A$9.B2.A$10.B.A$11.B$8.3A.B.3A$13.B$12.A.B$12.A2.B$12.A3.B$17.B$18.B
$19.B$20.B$21.B$22.B$23.B$24.B$25.B$26.B$27.B$28.B$29.B$30.B$31.B$32.B$33.B$34.B$35.B$36.3C$36.CB$37.CB!

PkmnQ · Post by **PkmnQ** » July 29th, 2020, 8:47 am

yujh wrote: ↑
July 29th, 2020, 5:15 am

PkmnQ wrote: ↑
July 29th, 2020, 4:55 am
For the canoe/snake, it can obviously be done in 2. One to remove the pre-block, and one to remove the remaining block.
Nope, only one for snake(at least itself)
galaxy,1
pd,1

No, I mean the infinite extensible snake/canoe mentioned at the start of the thrwad.

gooddogtyson · Post by **gooddogtyson** » July 29th, 2020, 10:18 am

ColorfulGalaxy wrote: ↑
July 29th, 2020, 5:49 am
2 gliders to destruct a beacon: (Can you find a way using 1 glider?)
Code: Select all
x = 4, y = 4, rule = LifeHistory
.C$2.C$3C5$7.2A$7.A$10.A$9.2A9$19.3C$19.C$20.C!
2 gliders to destruct a traffic light: (Can you find a way using 1 glider?)
Code: Select all
x = 0, y = 0, rule = LifeHistory
BC$.BC$3C$3.B$4.B$5.B$6.B$7.B$8.B3.A$9.B2.A$10.B.A$11.B$8.3A.B.3A$13.B$12.A.B$12.A2.B$12.A3.B$17.B$18.B
$19.B$20.B$21.B$22.B$23.B$24.B$25.B$26.B$27.B$28.B$29.B$30.B$31.B$32.B$33.B$34.B$35.B$36.3C$36.CB$37.CB!

1 glider for beacon and 1 glider for TL

Code: Select all

x = 27, y = 14, rule = B3/S23
17bo$18b2o$17b2o$7bo$6bo$6b3o13bo$22bo$22bo$2o$o17b3o3b3o$3bo$2b2o18bo
$22bo$22bo!

wwei23 · Post by **wwei23** » July 29th, 2020, 2:10 pm

2 for the barberpole:

Code: Select all

x = 36, y = 36, rule = LifeHistory
34.A$33.A$33.3A10$22.2A$21.A.A2$19.A.A2$17.A.A2$15.A.A2$13.A.A$13.2A
11$3A$2.A$.A!

1 for French Kiss:

Code: Select all

x = 13, y = 22, rule = B3/S23
11bo$10bo$10b3o11$o$3o$3bo$2bo2b2o$2bo4bo$3b2o2bo$6bo$7b3o$9bo!

hkoenig · Post by **hkoenig** » July 29th, 2020, 2:56 pm

There are only 42 possible collisions of a Glider and a 14-bit Barberpole. Done systemtically, it shouldn't take more than a few minutes to find this:

Code: Select all

x=14, y=15
2o$obo2$2bobo2$4bobo2$6bobo2$8bobo$9b2o2$11b3o$11bo$12bo!

wwei23 · Post by **wwei23** » July 29th, 2020, 3:38 pm

hkoenig wrote: ↑
July 29th, 2020, 2:56 pm
There are only 42 possible collisions of a Glider and a 14-bit Barberpole. Done systemtically, it shouldn't take more than a few minutes to find this:
Code: Select all
x=14, y=15
2o$obo2$2bobo2$4bobo2$6bobo2$8bobo$9b2o2$11b3o$11bo$12bo!

He said an arbitrary barberpole. My thing should work for any length.
36 gliders for 33-cell row:

Code: Select all

x = 295, y = 245, rule = B3/S23
40bo$38bobo$39b2o237bo$277bo$168bo108b3o$167bo$167b3o7$293bo$292bo$
292b3o4$32bo229bo$33bo227bo$31b3o227b3o6$145b2ob2o$145b2ob2o2$37bo219b
o$35bobo219bobo$36b2o219b2o2$32bo229bo$33bo227bo$31b3o227b3o31$87bobo
115bobo$88b2o115b2o$88bo117bo14$25bo133bo$26bo131bo$24b3o131b3o5$161bo
$159b2o$160b2o2$103bo87bo$104bo85bo$102b3o85b3o66bo$86b2o119b2o49bo$
86b2o119b2o49b3o2$115b2o61b2o$94b2o18bo2bo59bo2bo18b2o$94b2o18bobo20b
3o15b3o20bobo18b2o$115bo63bo$141b2o9b2o$141b2o9b2o$75b2o141b2o$75bobo
139bobo$76b2o139b2o$107b2o3b2o31b2ob2o31b2o3b2o$107b2o3b2o3b2o26b2ob2o
26b2o3b2o3b2o$117b2o57b2o3$138b2o15b2o$137bo2bo13bo2bo$138bobo13bobo$
139bo15bo2$131b2o29b2o$109b2o19bobo2b3o19b3o2bobo19b2o$109b2o19b2o31b
2o19b2o2$109b2o19b2o31b2o19b2o$109b2o19bobo2b3o19b3o2bobo19b2o$131b2o
29b2o2$139bo15bo$138bobo13bobo$137bo2bo13bo2bo$138b2o15b2o3$117b2o57b
2o$107b2o3b2o3b2o26b2ob2o26b2o3b2o3b2o$107b2o3b2o31b2ob2o31b2o3b2o$76b
2o139b2o$75bobo139bobo$75b2o141b2o$141b2o9b2o$141b2o9b2o$115bo63bo$94b
2o18bobo20b3o15b3o20bobo18b2o$94b2o18bo2bo59bo2bo18b2o$115b2o61b2o2$
34b3o49b2o119b2o$36bo49b2o119b2o$35bo66b3o85b3o$104bo85bo$103bo87bo2$
160b2o$159b2o$161bo5$158b3o107b3o$158bo109bo$159bo109bo14$88bo117bo$
88b2o115b2o$87bobo115bobo31$31b3o227b3o$33bo227bo$32bo229bo2$36b2o219b
2o$35bobo219bobo$37bo219bo2$145b2ob2o$145b2ob2o6$31b3o227b3o$33bo227bo
$32bo229bo4$3o$2bo$bo7$167b3o$167bo$15b3o150bo$17bo$16bo237b2o$254bobo
$254bo!

1 for brain:

Code: Select all

x = 24, y = 25, rule = B3/S23
22bo$21bo$21b3o12$b3o9b3o$obob2o5b2obobo$obobo7bobobo$bob2ob2ob2ob2obo
$5bobobobo$3bobobobobobo$2b2obobobobob2o$2b3o2bobo2b3o$2b2o2bo3bo2b2o$
bo4b2ob2o4bo$bo13bo!

2 for blockade:

Code: Select all

x = 32, y = 17, rule = B3/S23
11bo$10bo$10b3o3$30bo$29bo$2o27b3o$2o3$b2o17b2o$b2o17b2o3$21b2o$21b2o!

2 for interchange:

Code: Select all

x = 30, y = 20, rule = B3/S23
bo26bo$2bo24bo$3o24b3o11$10b3o4b3o2$8bo12bo$8bo12bo$8bo12bo2$10b3o4b3o
!

2 for the other kind of interchange:

Code: Select all

x = 31, y = 20, rule = B3/S23
bo27bo$2bo25bo$3o25b3o11$10b3o5b3o2$8bo13bo$8bo13bo$8bo13bo2$10b3o5b3o
!

2 for ecologist:

Code: Select all

x = 83, y = 31, rule = B3/S23
77bo$76bo$76b3o5$81bo$80bo$80b3o4$15b2o5bo2bo$14b4o8bo$14b2ob2o3bo3bo$
16b2o5b4o4$14b2o$13b2o7b3o$14bo2bo6bo$15bo6bobo$17b2o3b2o$2o$bo$b3o18b
o2bo$26bo$22bo3bo$23b4o!

Post by **dvgrn** » July 29th, 2020, 4:45 pm

If this thread sees a lot of traffic along these lines, I'm thinking it might be a good idea to move it over to the Sandbox so it can live with all the other "challenge" or "[GAME]" threads. It seems like it might be a fun thread for people that want to look for manual solutions instead of just doing an exhaustive search with gencols.

It doesn't seem to fit too well on the Patterns board, because a thread like this isn't ever likely to be a usable resource for object cleanups. There are just too many possible objects, so it doesn't make much sense to record solutions for them one at a time. Some scripting work with gencols could produce a list (for example) of all still lifes that can be destroyed by one glider -- up to 20 bits, or whatever upper limit you want up to 34 I suppose. A very very long search run could produce a much larger list of almost all such still lifes that can be cleanly destroyed by two gliders.

However, it's not very often useful to look up pre-calculated solutions for glider destructions, because in larger patterns where this kind of thing comes up, there are usually extra constraints -- gliders have to come from a particular direction, etc.

hkoenig · Post by **hkoenig** » July 29th, 2020, 5:09 pm

What would actually be interesting are objects/patterns where it can be proved that they can't be eliminated by two or fewer Gliders.

(Why two? I would suspect that most simple objects that can't be eliminated by one can be converted into an object, pattern or constellation that can. A non-simple object would be one with widely separated, discrete parts, like a Queen Bee Glider Gun.)

Moosey · Post by **Moosey** » July 29th, 2020, 7:16 pm

As a trivial consequence of the RCT, all destroyable objects can be destroyed in at most 32 gliders

Hdjensofjfnen · Post by **Hdjensofjfnen** » July 29th, 2020, 8:12 pm

Some ten-bit still lives I found lying around:

Code: Select all

x = 209, y = 33, rule = B3/S23
160bo$102b2o55bo41bo$21bo68bo12bo28b2o14bo10b3o25b2o13bo3b2o$bo18bo24b
2o11b2ob2o11b2o13bobo10bo16b2o10bobo6b2o6bobo18bo5bo12bo4bo6b3o3bobo$
2bo5bo11b3o14bo8bo12bobo12bo13bobo11b2o14bobo10bo9bo6b2o5b2o11bobo4bob
o8bo5bo15bo$3o4bobo6b2o11bo2bo3bo9bob2o9bo2bo12bo2b2o8bo14bo11b2o2bo
12bo8bob2o11bo12bobo3b2o9b2o4b3o12bo$7b2o7bobo10b4o3b3o8bo2bo9b2o14bo
2bo6bobo4b2o6bo13bob2o11bobo9bo2bo10bobo11bobo14bo18bo$5b2o10bobo28b2o
27b2o7b2o5bobo5b2o3b2o22b2o12b2o11bobo11bobo11bo19bo$4bobo11bobo10b2o
60bo12bobo49bobo11bo12b2o18b2o$5bo13b2o10b2o18b2o11b2o40bo12b2o38bo$
14b2o35bobo10bobo8b2o42bobo10b2o$15b2o34bo12bo9bobo42bo12bobo$14bo61bo
55bo14$3b2o$4bo$3bo$3b2o2b2o$4bo2bobo$3bo3bo$3b2o!

PC101 · Post by **PC101** » July 29th, 2020, 9:43 pm

1 glider destroys LWSS

Code: Select all

x = 15, y = 13, rule = B3/S23
bo$2bo$3o7$11b2o$10b2ob2o$11b4o$12b2o!

PkmnQ · Post by **PkmnQ** » July 30th, 2020, 7:27 am

How many gliders does it take to destroy an n-fold hat (is there an official term for it?)

For example, this is a 1-fold hat:

Code: Select all

x = 5, y = 4, rule = B3/S23
2ob2o$bobo$bobo$2bo!

This is a 2-fold hat:

Code: Select all

x = 7, y = 5, rule = B3/S23
4bo$2obobo$bobobo$bobob2o$2bo!

etc.

wwei23 · Post by **wwei23** » July 30th, 2020, 11:26 am

PkmnQ wrote: ↑
July 30th, 2020, 7:27 am
How many gliders does it take to destroy an n-fold hat (is there an official term for it?)

I got the first 6 in one glider:

Code: Select all

x = 26, y = 113, rule = B3/S23
7b2ob2o$8bobo$8bobo$9bo3$11b3o$11bo$12bo12$11bo$7b2obobo$8bobobo$8bobo
b2o$9bo4$11b3o$11bo$12bo10$11bo$7b2obobob2o$8bobobobo$8bobobobo$9bo3bo
4$12b3o$12bo$13bo10$11bo3bo$7b2obobobobo$8bobobobobo$8bobobobob2o$9bo
3bo7$3o$2bo$bo7$11bo3bo$7b2obobobobob2o$8bobobobobobo$8bobobobobobo$9b
o3bo3bo6$23b3o$23bo$24bo8$11bo3bo3bo$7b2obobobobobobo$8bobobobobobobo$
8bobobobobobob2o$9bo3bo3bo6$11b3o$11bo$12bo!

Man, this is something that even someone like me who is pretty inept at Life can sink their teeth into.
While working on some of the other challenges, I found two paperclip seeds, too.

Code: Select all

x = 140, y = 83, rule = B3/S23
22bo$21bo$21b3o$85bo$84bo$84b3o7$3o15b3o2$4b2o9b2o$4b2o9b2o$70b3o4b3o
2$68bo12bo$8b2ob2o55bo12bo$8b2ob2o55bo12bo2$70b3o4b3o2$3b2o13b2o$3b2o
12bo2bo$17bobo$18bo53$137b2o$137bobo$137bo!

goldenratio · Post by **goldenratio** » July 30th, 2020, 3:25 pm

REDACTED

yujh · Post by **yujh** » July 30th, 2020, 9:00 pm

Code: Select all

x = 16, y = 16, rule = B3/S23
14bo$13bo$13b3o3$9bo$8bobo$3b2obo2bo$3b2ob3o2$3b2ob3o$4bobo2bo$2bobobo
2bo$bobo3b2o$obo$2o!

Code: Select all

x = 18, y = 11, rule = B3/S23
9bo$8bobo4bo$3b2obo2bo5bobo$3b2ob3o6b2o2$3b2ob5o$4bobo4bo$2bobobobob2o
$bobo3b2obo$obo9bo$2o9b2o!

7fold

Code: Select all

x = 27, y = 35, rule = B3/S23
bo$2bo$3o23$14bo3bo3bo$10b2obobobobobobob2o$11bobobobobobobobo$11bobob
obobobobobo$12bo3bo3bo3bo3$17b3o$17bo$18bo!

8,2

Code: Select all

x = 24, y = 10, rule = B3/S23
bo$2bo$3o3$9bo3bo3bo3bo$5b2obobobobobobobobo$6bobobobobobobobobo$6bobo
bobobobobobob2o$7bo3bo3bo3bo!

9,2

Code: Select all

x = 46, y = 10, rule = B3/S23
5bo$6bo37bo$4b3o38bo$43b3o2$4bo3bo3bo3bo$2obobobobobobobobob2o12b2o8bo
$bobobobobobobobobobo13b2o7bobo$bobobobobobobobobobo22bobo$2bo3bo3bo3b
o3bo24bo!

10,1

Code: Select all

x = 23, y = 10, rule = B3/S23
14bo$15bo$13b3o3$4bo3bo3bo3bo3bo$2obobobobobobobobobobo$bobobobobobobo
bobobobo$bobobobobobobobobobob2o$2bo3bo3bo3bo3bo!

11,1

Code: Select all

x = 30, y = 5, rule = B3/S23
4bo3bo3bo3bo3bo$2obobobobobobobobobobob2o$bobobobobobobobobobobobo3b2o
$bobobobobobobobobobobobo3bobo$2bo3bo3bo3bo3bo3bo4bo!

12,2

Code: Select all

x = 43, y = 13, rule = B3/S23
40bo$25bo15bo$26bo12b3o$24b3o2$41b2o$4bo3bo3bo3bo3bo3bo15bobo$2obobobo
bobobobobobobobobo14b2o$bobobobobobobobobobobobobo11bo$bobobobobobobob
obobobobob2o10bo$2bo3bo3bo3bo3bo3bo14bo2$39b3o!

Entity Valkyrie 2 · Post by **Entity Valkyrie 2** » August 1st, 2020, 3:31 am

Crossposting:

Entity Valkyrie 2 wrote: ↑

October 21st, 2019, 4:15 pm

PkmnQ wrote: ↑
October 21st, 2018, 3:00 am
Trying to destroy random.rle is bad for your health

Code: Select all

x = 810, y = 810, rule = B3/S23
764bo$762b2o$763b2o8$787bo21bo$785b2o20b2o$759bo26b2o20b2o$757b2o$758b
2o7$790bo$759bo28b2o$757b2o30b2o$758b2o4$723bo55bo$721b2o54b2o$722b2o
54b2o3$738bo$736b2o$737b2o5$723bo$721b2o$722b2o10$740bo$738b2o$739b2o
49$701bo$699b2o$700b2o6$696bo$694b2o$695b2o7$633bo$631b2o$632b2o2$730b
o$728b2o$729b2o5$693bo$691b2o$692b2o6$689bo$687b2o$688b2o$715bo$713b2o
$714b2o7$608bo$606b2o$607b2o$705bo$703b2o$704b2o3$640bo$638b2o52bo$
639b2o49b2o$691b2o3$544bo$542b2o$543b2o7$624bo$622b2o$623b2o7$582bo$
580b2o$581b2o$544bo$542b2o$543b2o7$527bo$525b2o$526b2o7$513bo$511b2o$
512b2o$622bo$620b2o$621b2o4$502bo$500b2o$501b2o113bo$614b2o$615b2o7$
595bo$593b2o$528bo65b2o$473bo52b2o$471b2o54b2o85bo$472b2o138b2o$613b2o
18$514bo$512b2o$513b2o37bo$492bo57b2o19bo$490b2o59b2o16b2o$491b2o77b2o
6$571bo$569b2o$480bo89b2o$478b2o30bo$479b2o27b2o$509b2o9$446bo$444b2o$
445b2o2$442bo$440b2o$441b2o$549bo$547b2o$548b2o36bo$584b2o$585b2o4$
445bo50bo$443b2o49b2o$444b2o49b2o4$451bo$449b2o$450b2o10bo156bo$460b2o
155b2o$461b2o25bo129b2o$486b2o$487b2o6$519bo6bo$517b2o5b2o86bo$518b2o
5b2o83b2o$611b2o4$448bo$446b2o$447b2o$572bo$570b2o$493bo77b2o$491b2o$
492b2o$460bo$458b2o$459b2o62bo$521b2o$522b2o$512bo$493bo16b2o$491b2o
18b2o$466bo25b2o$464b2o$465b2o56bo$521b2o$522b2o14bo12bo$536b2o11b2o$
537b2o11b2o2$466bo$464b2o$465b2o2$504bo$502b2o18bo$503b2o15b2o$521b2o
4$528bo$526b2o$527b2o2$479bo$477b2o$478b2o$472bo$470b2o38bo$471b2o35b
2o$509b2o3$487bo$485b2o$486b2o8$488bo$486b2o$487b2o36$493bo$491b2o$
492b2o79$242bo$240b2o$241b2o96$300bo$298b2o$299b2o116$130bo$128b2o$
129b2o4$2obob2o3b2ob2o2bob2o3b2o3b2o2bo5bo8b2o2b2obob2ob2o3b2ob2o3b2o
5b2ob2obo3b2ob2obo$ob2obo5bobo2bob2o3bo2bobobo2b3o3b3o5bo2bo2bob2obobo
4b2obobo3bo2b2o2bobob2o2bobobob2o$6bo4bo2bobo4bo2bobobo7bo5bobo2bo2bob
o5bobobo6bo3bo3bob2o2bo3b3obobo$b6o5b2obobob2ob2obo2bo4b2obo2b4ob3ob3o
bob2ob2obob6obobo2b3o4b2ob2o4bobob3o$o12bo3b2obobo2bobob2o2bob2obo8bo
3b2o2bobo2bo6bobob2obo2b3o4bob2o2bobo3bo$b2ob2obobobobo2bo3bobo2bobo2b
o7bob2ob4o2bo3bobobobo2b3obo2bo4bo2bo2b4o4bobo2b2o$2bobob2ob2obo3bo3bo
bob2o2bo2b6ob2obobo3b3ob2o2bobob3o2bob2obob3o4b2o3bob2obob2obo$2bobo7b
obobob2o3bo2b2o8bo7b3o3bo2b3obo4bobo4b2o3b4o2bo3bobobo4bo$b2obob6ob2o
2bo6b2o2b6o2bob6o4bo2bo5b4obobob2o4bo6bo2bobobobob3ob2obo$o3bobo4bo3bo
bo8bobo5bobobo5b4ob2ob4o4bobobobob5ob4obob2o2bobobo4bob2o$b4o2b2o3bobo
2bobo4b2o2bobobobobo3bo2bo3bo2bo5b3o3bo2bo7bo3bobo3bobobo3b3o$5bobo3b
2obobob2o5bobob3obobob3obo2bo3bobob4o2b2o2b2obob4o2bob2o2bo3bobo2b3o3b
4o$b5o2bo5bobo7bo2bo5bobo2bo2bob2o2b2obobo3bo8bobo3bobo2bobob2obo2b2o
2bobo4bo$o5bobo2b4ob6o2bobo2b3obob2o3b2o2bobo2bobo2bobob6obobo2b2ob2ob
obo2bob3o2bo3b3o$4o2bobobo11bobo2b2obo2bo3b3o2bobo2bo3bob2ob2o5bobob2o
5bo2bob2o5bob4o3bo$4bobobobo2b8obob3o5bob3o2bob2ob3o3bobo6b3obobo3b4ob
o3bo2b6o5bob2o$2o2bobobobobo3bo3bobo4b2obob2o3bobo3bo3b4o3b5o2bobo2b3o
3bo2b3o2bo7b5obo$obobo2bobobob2o3bobo2b2obo2b2o4bobob4o2bo5b4o3bobo2bo
5b2o2b2o3b2ob7o6bo$2bo2bobobobobob4o2bobo3bo3b4obobo4b3ob2obo5bobobobo
3b2obob2o2b2o2bobo7bob2ob2o$bobobobobobobobo3bobobob2ob3o5bo3b2o4bobob
2o2b3obobobobo2bobo3bobob2o3b2ob6obo2bo$2bo2bo2bo2bobobo2b2obob2obo4b
4ob4o2b3o3bo4bo4bobobob2obobo3bo2bo6bobo8bo$3b3o5bobobobo3bo4bob2o4bo
6bo3b4ob3ob5obo2bo3bob3obo3bobo3bo4b6o$6b5obo2bobo3bob2obobob3o2bob3ob
obo6bo2bo6bo3b2obo4bo3b2ob3ob6o$b4o5bobob2obob3obo2bo6b2o3bobobob5o2bo
bo2b2obob3o2bo2b2o4bo6bo7bob2o$bo2bob2o4bobo3bo5bobo2b4o2b2o4bo2bo3bob
2obobobobobo2bo2b2ob2o3bob4obob5ob2obo2b2o$2bobobo5bo2b2obo2b2obobobo
3bobo2b3obobo2bobo2bobobobobobobo9bobobo3bobobo2bo7b2o$3b2o2bo5bobob2o
bo2b2obobo2bo2bobo2bobobob2obobo2bobob2obo2b11obobobo3bo4bob2obo$o4b3o
4b2obo4b2o4bobobo3bo2bobobobo2bo2b2ob2obo4bobo4bo7bobob5o2bobobob6o$5o
10bob2o3b4obobob3ob2obobobobobo4bo3bob2o2bo2bo4b2ob4o2bo5b3obobo6bo$4b
ob2o4b4obob3o3bobobo5bo2bobobobob2o3bo3bobo4b7ob2o4bobo2b3o3bobob4o$3o
bo2bo3bo5bo4b3o2bobob3obob2obobobobo2bob2ob2o2b4o11b3o2bobo3b3o2bo5bo$
o2bob2o4bob5ob2o3bobo2bobo2b2obo2bobobo2b3obo4b2o4bob2o2b5o3b2o2b3o4b
2ob5o$bobo5b2obo6bob3o2bobo3bo5b2o2bobo6bob2o3b2o2bobo2bo2bo2bobo2b2o
3b4o3bo$2obob2o2bo2bo2b3o8bob3ob6o2b3o2b4ob2obob3o2bobo2b3o5bob3o2b3o
3bob2o2bo$3bobobobob2obo3b9o4bo5bobo3bobo2bobo8b2ob3o9bo3bobo2b2obo2bo
b2o2bo$3bobobobo4b4o9b3obobobobo2bo2bo2bobo2b8o6b5o6b3o2bobobobobo3b3o
$b2obo2bobob2o5bo2b2o2bo3bobob2obobobo3b2obobobo7bob4o5bob4o3bobo3bobo
2bobo$bo2bob2ob2ob2ob2obo2bo2bob3o2bo4bobob2o3bobobo2b8obo3b2o2b2obo3b
obo2bo3bob2obobob2o$2bobobo9bob2obob2o4b2ob4obobo2bo2bobobo12b2o3bo4bo
2b2ob2ob2ob2o4bobobo$b2obo2b5ob2obo2bobo4b2o2bobo4bobobo2b2obob4ob4ob
2obob2ob5o3bo2bo2bo5b3o2bobo$2bobo7b2o2b3o2b4obo3bobo2b3obob3o3bo4bobo
2bobo2bo2bo10b2o2bo2b5o2b3ob2o$2bobobobobo4bo3b2o3bobo2b2obobo3bobo3b
2o2b4o3bobo2bobobo2b7o7b3o5bo4bo$b2o2bob2ob4obo2bo2b2obobobo2bobob2obo
3bobo7b4ob4o2bob2obo4b8o5b2obo2b2o2bo$o2bobo8b2obobobo2bobobobo2bobo2b
5o2b6obo8bobo2bo3bo9bob2o2bo2bobo2b2obo$b2obobob5o4bobobo2bobobo2b3obo
bo5bobo4bo3b2ob2o2bob2obo2b10obobobobo2bob2obo2bo$4bobobo4b4o2bob2obob
ob3o5bobob2obo2b2o3b3obobobobo2bobobo10b2obobob2obo2bobobo$b2obobo2b3o
5b2o5bobo4bob2obob2obobo4bo6bo3bobobo2bobo2b3ob3o4bobo4bobo2bob2o$o2bo
2b3o3b4obo6bobob4obo2bo5bob4o2bob2obobo2bo2bobo2bobo2bobo2b3obo2b4obo
3bo$bo2b2o3b3o3bobobob2obobobo5b3ob3obobo3b4obobob3o3bobobo2b2o3bobo2b
ob2obo3bo3b2ob2o$2b2o3b2o4bobobob2obobobo2b5o3bo2bobo2b3o5bobo4b4obobo
bo5bob2obo2bobobo6bob2o$5b2o2b6obobo3bobob2obo4b2obobo2b3o3b6obob2obo
4bobob5obo2bob2obobob2o5bo$2b3o2bobo6bo2bob2obo4bob2o3b2obobo3b2o9bobo
2b4o2b2o4bob3o5bobo3bo3b2o$bo3bobobob4ob3o3bobob2obobob2o3b2obob2o2b5o
b3o3b2o3bobo3b2obo4b5obob3obo3bob2o$bobo2bo2bobo2b2o3b2o3bob2ob2o2bob
2o4b2obobo4bobo2b3o2bobo2bob2obobob2obo3bobo3bo2bo2bob2o$2ob2obobo3bo
4bo3b4o8bobob4o3bo2b2o2bobobo3bobobobobo4bo2bo2bobo4b2obo3bobo$6bob5ob
2ob4o4b9obobo2bob2obobobobobo2bobo2bobobobob2obobo2b2ob4obobob3o2bo$2o
b2o2bo6bobo5b3o4bo4bo3bobobo2bo3bobob4obobobo2b2obobo2bob2o6bobobo4b2o
b2o$bobo4b6o2bob4o4bo4b2obob3obo2b3obobobo5bo2bobobo3bo2bobo2bob4obobo
b5o2bo2bo$o2bobo7bobobo5bob2o5bo2bo4b3o3bobo3b5o3bobo2bobob3o2bobobo2b
obobo5bo2bobo$2obob7o3bo3b5obo6bo3b4o3b2obobob2o5b3o2b4obo4b2o2bo2bobo
bobob2o2bob2ob2o$bob2o7b3ob3obo5bo3bob4o3bobo2bobobobo2b3o4b2o6b4o4b2o
bobobobobobobobo$o5bob2o2bo3bo5b4obobobo4b2obob3o2bobo3b2o2b3obo2bob3o
4b4o2bobob2obo3bobobo$4ob2obo7bob4obo3bobo3b2obobo5b2obobo6bo2bo2b2obo
2b3obo3bobobo4b4o3bob2o$3bobo2bo2bo3b2obo8bob4obobobob4o3bob4obobobo4b
obobo2bobo2b2obo2b4o4b2obobo$2obo2bobobobobo6b2o2b2obo3bobobobobo3bob
2o5b2obob2o3bo2bob2o2bobo2bobobo4bo2bob2obo$obobobobobobob2ob5o4bobob
2o3bo2bo2bob2obo2b3o3bobo3b2obobobo3bobo2bobobob3obobo4b2o$2bobobobobo
bo2bobo5bo2bo2bo2b3o3b3o3bo3b2o2b2obobob2obobobobo2b2o2b3obo2bo2bobob
4obo2bo$2bobobobobob2obo2b6o3bobobo9b2obo6bo2bobobobobobobobobo2b2o4b
2obobo2bo4bobob2o$b2ob2obo2bobo2b3o2bo7bo2b4o2bobo2bobob4obobo2bobobob
obob2obobo4bobo3bobobo2b2o3bobo$bo5bobo2bobo3bo3b2o2bobobo3b4ob3o2bobo
2bobob3o2bo2bo2bo4bob6obob2obobob2o2b4o2bo$2b6ob2obo2bobo3b2o2bobobob
2o5bo5bobobo2b2o3b2obobobo2b3obo7bobo2bobo3b2o4b3o$11bob3ob2o5b2obo2bo
2b4obobobobo2bob2o3bo4bobo2b2o2bobob5obo2bobo2bobo3bobo$4ob5obo13bob2o
bobo4bob2ob2obobo2bob2ob4obob2o2b2o2bobo3bo2bobobob2ob4ob2ob2o$o2bobo
3bo2b4ob2o6bo2bobob4obo7bob2obo2bo6bo2bobo2b2o2bobo2bobobobo7bo3bobo$
5bobo2b2o3bobo2bo2bob2obo2bo4bo2b2ob4obo2bobo2b3obobobo2bo5bob4obobobo
b5o3b2o$4bobob2o2bo2bo2bob4o2bo2bobob2o5bobo4bobobob2o2bobobob2obob5o
5bo2bobobo4b3o2b2o$3bo2bobo2bobob2obo5bo3b2ob2o2b5o2bob2obobobo3bobobo
b2o3bobo5b3obobo2bo3b2obo2bo2bo$3b4obob2obo4b5o2b3o6bo4bobobo2bobobo2b
3obo2bo3b3obo2b3o3b2obobob4o2bobob2o$o7bo2bobob3o5b2o4b6ob2obobobobo2b
o2b2o3bob2o2b2o4bobo4bo3b2obo6bo2bo$4ob4o2bobobo2b5o3b3obo5b2obo2b2obo
bobobo2bo2bo2b2o2b4o2b5ob2o3bobob3ob2obo$3bobo3b2o2bo2bo6b3o6b3o4bo4bo
bo2bo2bob2obobo2bo5b2o6bob3o2bobo2bo3b2o$2obo3bo2bobob2ob4obo2bob5o2bo
b2ob5o2bobobobo2bobobobob5o3bob2obo3bob2o2bobob2o2bo$obo2bob2o3bo3bo3b
obo3bo5bo2bobo5bobobobobobo4bob2obo4b4obo2bo3bo3b3o2bobobobo$3b3o3b3ob
2obo2bo3b3o2b3o2b2o2bob3obobobobo2bob3obo5b4o5bo2b2o3b3o3bobobobo2bo$
6bobo4bo2bobob3o3b2o3b2o2b2obo2bobobobo2bobo4bobob2obo3bob3ob2o3bobo3b
2o2bobob2obo$b4obob4obob2obobo2bobo2b2o4bo3bobo2bobob2obob4o3b2obo4b2o
bo2bo2b4o3b2obob2obobo2b2o$o4bo5bobobo2bobo2bobobo2b5ob2obob3obo3bo6b
3o3bobo3bobobo2bo4b3obobo2bobobobo$4obob4o2bobob2o2b3ob2o2bo5bobo2bo4b
3o2b4obo3bobo2b4o2bob2obob2o3bobob2obobobo2b2o$3bobobo2bob2o2bo2b2o9b
4obobo4b3o3b2o3bob5obobo6bo4bobob2obobo3bo2bo2bobo$2obobo2bo2bo2bobobo
2bob7o3bob2ob4o2bobo3bo2bo7bo2bob5ob4obo3bobobobo3bob2o2bo$o2bo2bob2ob
o2bobob2obobo6b2obo4bo3bo3b3o2bob6obo2b2obo4bo5b3obo3bobobobo2bob2o$bo
b4o4b4obo4bobob4obobob3obob2ob3o3b3o6bob2obo2bob2obob4o3bob4obob2obo3b
o$2o5b4o5bob3obo2bo2bo3bo4bobo3bo2b3o3b5obo4bob2obo2bobo4bobo5b2o4b2o
2bo$2b4obo2bob2obo2bo3bobo3bobo2b3obo2b2obobo3b2o6b2ob2obo4bobo3b4obob
ob2o4b3o2bob2o$2bo2bo2bobobo3b2o4bo2b4ob3o3bob2o2bo2b2o2bob5o4bo2b6ob
4o3bobobobob4o3bobo$6bobobobob2o4b2obobo7bo2bo3bobobo2bobobo2bo5bobo6b
o4bo4bobobobo3bobo2bob2o$5b2obobo2bo2bobo2bobobob2ob3o2b2o3bobob2o2bob
o5bobobobobob2obob3o5bobobo2bo2bobobo2b2o$9b2o4b2ob2o4b2ob2obo10bo7bo
5b2ob2o3b2obob2obo6b2ob2o2b2o3b2ob2o!

ColorfulGalaxy · Post by **ColorfulGalaxy** » August 6th, 2020, 6:52 am

Code: Select all

x = 55, y = 55, rule = LifeHistory
16.A12.A$9.2A24.2A$8.3A3.2A14.2A3.3A$14.2A.2A8.2A.2A$16.A12.A4$2.A40.A$.2A40.2A$.2A40.2A4$
2.2A38.2A$2.2A38.2A$A3.A36.A3.A$3.A38.A$3.A38.A9$3.A38.A$3.A38.A$A3.A36.A3.A$2.2A38.2A$2.2A
38.2A4$.2A40.2A$.2A40.2A$2.A40.A4$16.A12.A$14.2A.2A8.2A.2A$8.3A3.2A14.2A3.3A$9.2A24.2A$16.A
12.A7$52.2A$52.A.A$52.A!

I tried to destruct Karel's Big Cake using gliders, but end up finding the glider passing
straight through the cake without any harm!

Can you find a way to destruct Karel's Big Cake with gliders?

yujh · Post by **yujh** » August 6th, 2020, 8:12 am

ColorfulGalaxy wrote: ↑
August 6th, 2020, 6:52 am
Code: Select all
x = 55, y = 55, rule = LifeHistory
16.A12.A$9.2A24.2A$8.3A3.2A14.2A3.3A$14.2A.2A8.2A.2A$16.A12.A4$2.A40.A$.2A40.2A$.2A40.2A4$
2.2A38.2A$2.2A38.2A$A3.A36.A3.A$3.A38.A$3.A38.A9$3.A38.A$3.A38.A$A3.A36.A3.A$2.2A38.2A$2.2A
38.2A4$.2A40.2A$.2A40.2A$2.A40.A4$16.A12.A$14.2A.2A8.2A.2A$8.3A3.2A14.2A3.3A$9.2A24.2A$16.A
12.A7$52.2A$52.A.A$52.A!
I tried to destruct Karel's Big Cake using gliders, but end up finding the glider passing
straight through the cake without any harm!

Can you find a way to destruct Karel's Big Cake with gliders?

Karel's P177
Best 1g:

Code: Select all

x = 60, y = 82, rule = B3/S23
2bo$obo$b2o34$30bo12bo$23b2o24b2o$22b3o3b2o14b2o3b3o$28b2ob2o8b2ob2o$
30bo12bo4$16bo40bo$15b2o40b2o$15b2o40b2o4$16b2o38b2o$16b2o38b2o$14bo3b
o36bo3bo$17bo38bo$17bo38bo9$17bo38bo$17bo38bo$14bo3bo36bo3bo$16b2o38b
2o$16b2o38b2o4$15b2o40b2o$15b2o40b2o$16bo40bo4$30bo12bo$28b2ob2o8b2ob
2o$22b3o3b2o14b2o3b3o$23b2o24b2o$30bo12bo!

My attempt:16g

Code: Select all

x = 468, y = 118, rule = B3/S23
24bo232bo155bo25bo$22bobo231bo157bo25bo$23b2o231b3o153b3o23b3o3$222b2o
198b2o$221bo2bo19b3o174bo2bo$222b2o11b2o185b2o$235bobo4bo5bo$202bo33b
2o4bo5bo$200bobo39bo5bo$201b2o$244b3o218bo$465bobo$217b2o198b2o46b2o$
216bo2bo196bo2bo26b2o$217bo2bo31bo164bo2bo25b2o4bo$218b2o31bobo164b2o
31bobo$250bo2bo196bo2bo$208b3o39bobo197bobo$251bo163b2o34bo$206bo5bo
48bo153b2o44bo$116bo89bo5bo47bobo197bobo$115bo90bo5bo47bobo197bobo$
115b3o143bo199bo$208b3o2$401b2o$400bobo$402bo$208b2o$207bobo$207b2o3$
259b2o$52bo12bo192bobo$45b2o24b2o185b2o$44b3o3b2o14b2o3b3o391bo$50b2ob
2o8b2ob2o397bobo$52bo12bo399b2o2$257b3o$206bo199bo$38bo40bo125bobo47bo
5bo143bobo$37b2o40b2o124bobo47bo5bo143bobo$37b2o40b2o125bo48bo5bo144bo
44b2o$216bo199bo34b2o$215bobo39b3o155bobo$214bo2bo196bo2bo$38b2o38b2o
134bobo31b2o164bobo31b2o$38b2o38b2o135bo31bo2bo164bo4b2o25bo2bo$36bo3b
o36bo3bo166bo2bo168b2o26bo2bo$39bo38bo170b2o150b2o46b2o$39bo38bo321bob
o$221b3o178bo$265b2o$219bo5bo39bobo$219bo5bo4b2o33bo$219bo5bo4bobo$
231b2o11b2o198b2o$221b3o19bo2bo196bo2bo$244b2o198b2o$39bo38bo$39bo38bo
$36bo3bo36bo3bo127b3o215b3o23b3o$38b2o38b2o131bo215bo25bo$38b2o38b2o
130bo217bo25bo4$37b2o40b2o$37b2o40b2o$38bo40bo4$52bo12bo$50b2ob2o8b2ob
2o$44b3o3b2o14b2o3b3o$45b2o24b2o$52bo12bo12$3o$2bo$bo20$93b2o$93bobo$
93bo!

Edit:7g

Code: Select all

x = 204, y = 83, rule = B3/S23
2bo162bo$obo50bo112bo$b2o48bobo110b3o24bo$52b2o138bo$190b3o$169b2o$
169b2o3$150bobo$151b2o$151bo$182bo$182bobo$182b2o18b2o$202b2o2$198bo$
177b2o20bo$177b2o18b3o3$202b2o$202b2o2$158b2o$157bo2bo7bo$158bobo7bo$
159bo8bo2$157bo$156bobo$155bo2bo$156b2o4$81bo12bo$74b2o24b2o$73b3o3b2o
14b2o3b3o$79b2ob2o8b2ob2o$81bo12bo4$67bo40bo$66b2o40b2o$66b2o40b2o4$
67b2o38b2o$67b2o38b2o$65bo3bo36bo3bo$68bo38bo$68bo38bo9$68bo38bo$68bo
38bo$65bo3bo36bo3bo$67b2o38b2o$67b2o38b2o4$66b2o40b2o$66b2o40b2o$67bo
40bo4$81bo12bo$79b2ob2o8b2ob2o$73b3o3b2o14b2o3b3o$74b2o24b2o$81bo12bo!

Edit2: another 7g

Code: Select all

x = 264, y = 104, rule = B3/S23
213bo$214bo$212b3o8$obo$b2o$bo199bo14bo$202bo14bo$200b3o12b3o3$205bo
20b3o20b2o$204bobo42b2o$204bobo$205bo2$73bo157b2o$71bobo156bo2bo$72b2o
157b2o$218b2o$218bobo$219b2o3b3o2$257b2o$257b2o2$229bo$228bobo30b3o$
228b2o31bo$262bo2$257b2o$257b2o3$261b3o$261bo$262bo15$101bo12bo$94b2o
24b2o$93b3o3b2o14b2o3b3o$99b2ob2o8b2ob2o$101bo12bo4$87bo40bo$86b2o40b
2o$86b2o40b2o4$87b2o38b2o$87b2o38b2o$85bo3bo36bo3bo$88bo38bo$88bo38bo
9$88bo38bo$88bo38bo$85bo3bo36bo3bo$87b2o38b2o$87b2o38b2o4$86b2o40b2o$
86b2o40b2o$87bo40bo4$101bo12bo$99b2ob2o8b2ob2o$93b3o3b2o14b2o3b3o$94b
2o24b2o$101bo12bo!

P138

Code: Select all

x = 79, y = 89, rule = B3/S23
5bo$6b2o$5b2o3$10bo$11bo$9b3o7$76bo$76bobo$76b2o4$55bo$20bo32b2o$21bo
32b2o$19b3o$11bobo$12b2o19bo$12bo18bobo$32b2o$56bo$56bobo$56b2o$21bobo
$22b2o$22bo21$16b3o39bo$18bo38b2o$17bo8b2o29bobo$27b2o$26bo$50b2o$50bo
bo$50bo5$13b2o$12bobo$14bo$53b2o$53bobo$53bo9b2o$b2o60bobo$obo60bo$2bo
16b2o$14b2o2bobo$15b2o3bo48b2o$14bo53b2o$70bo3$67b3o$67bo$68bo3$60b3o$
60bo$61bo!

ColorfulGalaxy · Post by **ColorfulGalaxy** » August 6th, 2020, 8:55 am

2 gliders to destruct a Beethoven. Can you find a way using only one?

Code: Select all

x = 32, y = 31, rule = LifeHistory
.A5.A$A.A3.A.A$A.A3.A.A$.A5.A2$3.3A11$15.3C$15.C$16.C10$29.3C$29.C$30.C!

yujh · Post by **yujh** » August 6th, 2020, 9:06 am

ColorfulGalaxy wrote: ↑
August 6th, 2020, 8:55 am
2 gliders to destruct a Beethoven. Can you find a way using only one?
Code: Select all
x = 32, y = 31, rule = LifeHistory
.A5.A$A.A3.A.A$A.A3.A.A$.A5.A2$3.3A11$15.3C$15.C$16.C10$29.3C$29.C$30.C!

Code: Select all

x = 14, y = 10, rule = B3/S23
bo5bo$obo3bobo$obo3bobo$bo5bo2$3b3o2$11b2o$11bobo$11bo!

gameoflifemaniac · Post by **gameoflifemaniac** » August 9th, 2020, 3:49 pm

Tumbler in 1G:

Code: Select all

x = 13, y = 10, rule = B3/S23
5bo5bo$4bobo3bobo$4bo2bobo2bo$6bo3bo$6b2ob2o3$3o$2bo$bo!

ColorfulGalaxy · Post by **ColorfulGalaxy** » August 10th, 2020, 4:10 am

2 gliders to destruct a cis-mirrored professor. Can you find a way using only one?

Code: Select all

x = 38, y = 35, rule = LifeHistory
.2A3.2A$A2.A.A2.A$2A.A.A.2A$3.A.A$2A.A.A.2A$2A.A.A.2A$3.A.A$3.A.A$2A.
A.A.2A$A2.A.A2.A$.2A3.2A9$20.3C$20.C$21.C11$35.3C$35.C$36.C!

3 gliders to destruct a technician (the other two are not shown here). Can you find a way using less?

Code: Select all

x = 22, y = 24, rule = LifeHistory
5.A$4.A.A$4.2A$2.2A$.A3.3A$A2.2A3.A.A$.2A4.A.2A$3.A.A.A$3.A3.A$4.3A$6.
A.A$7.2A10$19.3C$19.C$20.C!
NOTE: The blockade can be killed with two other gliders.

2 gliders to destruct a trans-mirrored professor. Can you find a way using only one?

Code: Select all

x = 47, y = 42, rule = LifeHistory
.2A3.2A$A2.A.A2.A$2A.A.A.2A$3.A.A$2A.A.A$2A.A.A.2A$3.A.A.2A$3.A.A$2A.
A.A.2A$A2.A.A2.A$.2A3.2A13$22.3C$22.C$23.C14$44.3C$44.C$45.C!

2 gliders (synchronous) to destruct a clover leaf interchange. Can you find a way using only one?

Code: Select all

x = 42, y = 51, rule = LifeHistory
4.A3.A$3.A.A.A.A$3.A.A.A.A$.2A2.A.A2.2A$A4.A.A4.A$.4A3.4A2$.4A3.4A$A4.
A.A4.A$.2A2.A.A2.2A$3.A.A.A.A$3.A.A.A.A$4.A3.A$14.3C$14.C$15.C32$30.3C
$30.C$31.C!

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