ConwayLife.com

[…]
LSSS has some bugs and is not trustworthy for negative results (see https://conwaylife.com/forums/viewtopic.php?p=117823#p117823 ). Sokwe maintains a list specifically for LSSS results here .


I had, in fact, read that post, but I assumed that that issue was canceled out by this post:


I ...

new 2c/7s, all using the same front end:
x = 107, y = 127, rule = B3/S23
2b3o13b3o22bo15bo25bo15bo$43bo15bo24b3o13b3o$2bobo13bobo21bobo13bobo
23b3o13b3o$3bo6b3o6bo23bo7bo7bo33bo$43bo7bo7bo32b3o$4bo5bobo5bo31bobo
34bo4b3o4bo$3b3o5bo5b3o23b3o5bo5b3o25b2o13b2o$b2o2bo11bo2b2o20b2obo5bo ...

Why did you triplepost?

Shuich01, in the future if your post is the most recent post in the thread and less than a week has passed, please edit it to include any new discoveries rather than making a new post. Also, I moved this discussion to the sandbox, as it's off topic in the ...

no 2c/7 w13a spaceship is found with LSSS, if it did not miss something:
longest paritals by seedcolumn:
x = 163, y = 63, rule = B3/S23
bo30bo30bo30bo29bo31bo$b3o27bobo29bo30bo28bobo29bobo$3b2o25b2obo28bobo
28bobo26b2obo32bo$bo3bo24b2ob3o27bo30bo27b2ob3o26bo3b2o$bo4b2o26b3o26b
o30bo31b3o24bobo ...

2c/7o:
x = 18, y = 78, rule = B3/S23-a5
3b3o6b3o$2bobo2b4o2bobo$6b6o$2o3b3o2b3o3b2o$2b2o3bo2bo3b2o$3bob3o2b3ob
o$8b2o$4b2ob4ob2o$6bo4bo2$6bo4bo2$4b3o4b3o$7bo2bo$6b2o2b2o$5bo2b2o2bo$
b4obo4bob4o$b2o2b2o4b2o2b2o$obo4bo2bo4bobo$8b2o2$6b2o2b2o$5bob4obo$7bo
2bo$3bobobo2bobobo$3b2o2bo2bo2b2o$5b3o2b3o ...

Speaking of doing a minor reduction to the original Caterpillar, we can just do some fine-tune to some parts, which do nothing but changing the blinkers' phase, from this:
clipboard0.png
to like this:
clipboard1.png
I am not sure if it all works, but it may help reduce a little to the original ...

The big unavoidable differences between 31c/240 leaf bugs and 17c/45 caterpillars are that

1) leaf bugs can use gliders to build trails in front of themselves, but caterpillars are too fast -- so the only option for reaching the front is some kind of relatively expensive helix.

What is the ...

Since we've managed to reduce the centipede down to the water strider and have it even fit in a LifeViewer window, and also reduced the (34,7)c/156 macroship which exceeded the caterpillar's population and bounding box, how about we set some effort back into this project? I have enough confidence ...

a spaceship emerged from 2c/7 width-25 gutter search via LSSS (for seedcolumn 08)
x = 23, y = 37, rule = B3/S23
2bo17bo$2bo17bo$bobo15bobo$2bo17bo$2bo17bo$bo4bo9bo4bo$6b2o7b2o$2o4bob
2o3b2obo4b2o$8b2o3b2o$10bobo$2b3o3bobobobo3b3o$8bobobobo$2bobo4b2ob2o
4bobo$2bobo13bobo$3bo15bo$3bo15bo$7bo7bo ...

A new 2c/7 spaceship using some well-known components:
x = 69, y = 88, rule = B3/S23
25bo17bo$25bo17bo$24bobo15bobo$bo12bo10bo17bo10bo12bo$bo12bo10bo17bo
10bo12bo$obo10bobo8bo4bo9bo4bo8bobo10bobo$bo12bo14b2o7b2o14bo12bo$bo
12bo8b2o4bob2o3b2obo4b2o8bo12bo$2bo3b4o3bo17b2o3b2o17bo3b4o3bo$6b4o23b ...

A new weekender pseudo-pushalong found from my ongoing search via LSSS:
x = 41, y = 63, rule = B3/S23
13bo13bo$12b3o11b3o$12b3o11b3o3$12bob2o9b2obo$11bo4bo7bo4bo$12bo15bo$
12bo15bo$8bo3bo3bo7bo3bo3bo$8bo3b3o11b3o3bo$9bo7bo5bo7bo$10bo6b2o3b2o
6bo$11b2o5b2ob2o5b2o$13bo5bobo5bo$10b2o2b4obobob4o2b2o ...

No result for 3c/7 width 18 asymmetric via LSSS.
longest partials by seedcolumn:
x = 197, y = 51, rule = B3/S23
2bo30bo30bo30bo30bo30bo29bo$bob2o27bobo28bobo28bobo27b2obo27b2obo27bob
o$2o3bo25b2ob2o26b2ob2o26b2ob2o25bo3b2o3bo21bo3b2o3bo21b2ob2o$2b4o25b
2obo9bo17bo4bo25bo4bo24b4o4b3o20b4o4b3o20bo4bo ...

xs88_xggo0ogjlk4ozc870u2qa26gv0t50ggzx5t0f8baq2qb8701zy11156 in 28G:
x = 121, y = 60, rule = B3/S23
94bo$93bo$93b3o$16bo$16bobo$16b2o$11bo$9bobo71bobo$10b2o72b2o$84bo$25b
o$23b2o66bobo$24b2o11bo53b2o$17bo18bo55bo$15bobo18b3o$16b2o64b2o$82b2o
2$30bo$7bobo19bo9b3o$8b2o19b3o7bo48b3o$8bo31bo63b2o ...

Could there be any improvement on LSSS to make full use of CPU?
I tried to improve the performance through modifying [profile.release] in Cargo.toml but it only improved little and didn't make CPU fully used

I tried to build LLSSS but it failed to compile because of an error:

error[E0599]: no function or associated item named `new` found for struct `PriorityQueue` in the current scope
--> src/llsss/ends.rs:670:60
|
670 | ... let mut queue = PriorityQueue::new();
| ^^^ function or associated ...

I tried to build LLSSS but it failed to compile because of an error:

error[E0599]: no function or associated item named `new` found for struct `PriorityQueue` in the current scope
--> src/llsss/ends.rs:670:60
|
670 | ... let mut queue = PriorityQueue::new();
| ^^^ function or associated item ...

Many of the spaceship search scripts searches diagonal spaceships by orthogonal width (or height), and there seems to be a lack of powerful and effective search scripts for diagonal spaceships by diagonal width (or height).

... and a c/6 diagonal spaceship:
x = 105, y = 105, rule = B2n3/S23-q
3bo$2b4o$o$2obo3bo$3bo4b2o$2bo2b2o4bo$2b2ob2ob2obo$3b2o3b2o2bo$11bo$4b
3ob3o4bo$4b3o5b2ob2obo$5bobo3b3o3b2o$11b2obob2o$7bo2bo2bo2b2o$8bob3o6b
o$13b3o6bo$8bo3bo7b2o$8bo3bo2b2obob4o$9b3o3bo2bo4b2o$13b2o3bo4b3o$14b
2o4b4o2bo ...

(2,1)c/6 partial:
x = 54, y = 107, rule = B2n3/S23-q
6bo$4b2obo$2bo4bob3o$b2o4bo3bo$o5bo$b4obo4bo$2b2o3b5o$4bobo3bo$5bo4bo$
4bo5bo$7b2o$7b3o2$9b3o$9b2obo$7bo$9b2ob6o$7bobobobob3o$9bo2b3o$11bobo$
10bo2bo$10bo$11bo$13bo$11b3o$13b2o$15b2o$15bo$17b4o$14b3ob2o$14bo3bob
2o$15b4ob2o$19bo$16b3obo$20bo ...

2-barreled horiship rake gun:

(2,1)c/6 partial:
x = 54, y = 107, rule = B2n3/S23-q
6bo$4b2obo$2bo4bob3o$b2o4bo3bo$o5bo$b4obo4bo$2b2o3b5o$4bobo3bo$5bo4bo$
4bo5bo$7b2o$7b3o2$9b3o$9b2obo$7bo$9b2ob6o$7bobobobob3o$9bo2b3o$11bobo$
10bo2bo$10bo$11bo$13bo$11b3o$13b2o$15b2o$15bo$17b4o$14b3ob2o$14bo3bob
2o$15b4ob2o$19bo$16b3obo$20bo ...

Does a spaceship exist, that CAN BE PROVED to have NO parents except itself? (Not the ones like Sir Robin which is not clear to have one)

an almost c/7 diagonal partial:
x = 9, y = 16, rule = B3/S23
4bo$3bobo$b2ob2o$5o2bo$5bo2bo$8bo$2bo2b3o$3bobobo$3bobo$2bo2bob2o$4b2o
$4bobo$bobo$2b5o$5bo$6bo!


Cool! How did you find it?

It did come out at an ongoing search via LSSS (and now the search ends without any positive spaceships ...

an almost c/7 diagonal partial:

Does an algorithm that can detect a spaceship's exitance in certain width instead of "really" searching for spaceships exist?