c/8 orthogonal spaceships

For discussion of specific patterns or specific families of patterns, both newly-discovered and well-known.
unname66609
Posts: 87
Joined: December 20th, 2014, 8:30 am

c/8 orthogonal spaceships

Now with several new versions of search programs out and PCs still getting more powerful, it might be time to revisit this topic:

Are there any serious search results out there? Promising intermediate results? Ideas?

kiho park
Posts: 71
Joined: September 24th, 2010, 12:16 am

Re: c/8 orthogonal spaceships

Also, you can find incomplete result at here.

- Recent search result -

Code: Select all

``````#P 0 0
#R S23/B3
..............................
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....**........................
..*...*.......................
..*.....**....................
...*...***....................
....**....*...................
....**........................
....**.....*......*...........
....*..*...*.*....**..........
.....*...*....****............
.......***...*...*............
.......**....*.***............
........*.**.**.*.............
........**..*.**..............
............*.................
...........***................
..........**.*................
........*.**..................
........*.*...................
........**....................
.........*....................
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``````
Can small adjustable spaceships overrun the speed limit of (|x|+|y|)/P = 1?

## B0 rules are the best! ##

Bullet51
Posts: 571
Joined: July 21st, 2014, 4:35 am

Re: c/8 orthogonal spaceships

kiho park wrote:That is already mentioned.
Also, you can find incomplete result at here.

- Recent search result -

Code: Select all

``````partial ship
``````
That's a diagonal partial.
Still drifting.

kiho park
Posts: 71
Joined: September 24th, 2010, 12:16 am

Re: c/8 orthogonal spaceships

Bullet51 wrote:That's a diagonal partial.
Oops. Sorry, It's recent processing WinLifeSearch search result.
Can small adjustable spaceships overrun the speed limit of (|x|+|y|)/P = 1?

## B0 rules are the best! ##

velcrorex
Posts: 339
Joined: November 1st, 2009, 1:33 pm

Re: c/8 orthogonal spaceships

No miracles today, but I may as well post a promising partial. I searched for width 16 symmetric c/8 ships and found nothing. The search (with gfind) took about 3 weeks. Here's a promising partial:

Code: Select all

``````x = 14, y = 35, rule = B3/S23
o12bo\$2o3b4o3b2o\$6b2o\$3o8b3o\$14o\$b2o2b4o2b2o\$2bo8bo\$2b3o4b3o\$bo
2bo4bo2bo2\$bo3b4o3bo\$5bo2bo\$b2o3b2o3b2o\$obo2bo2bo2bobo\$2ob3o2b3o
b2o\$b3o6b3o\$2bo8bo3\$b3o6b3o3\$bo2bo4bo2bo\$o3bo4bo3bo\$bo2bo4bo2bo\$
2b4o2b4o\$3b8o\$4bo4bo\$4bo4bo\$4b2o2b2o\$6b2o\$b2o8b2o\$o2bo6bo2bo\$bob
o6bobo\$2bo8bo!``````
You'll see which part I think is promising.
With a lot of luck, someone will invoke some arcane magic and complete this ship.
-Josh Ball.

Sokwe
Moderator
Posts: 1837
Joined: July 9th, 2009, 2:44 pm

Re: c/8 orthogonal spaceships

That's a nice looking partial pattern, although I haven't yet been able to get anything from it. There seem to be several ways for the blinkers to react to get the same outcome, which gives some hope of a solution:

Code: Select all

``````x = 30, y = 27, rule = B3/S23
2\$13bo8bo\$12bobo6bobo\$11bo2bo6bo2bo\$12b3o6b3o\$13b2o6b2o\$14bo6bo\$13b2ob
4ob2o\$14bobo2bobo\$13b4o2b4o\$14bo6bo\$11bo3bo4bo3bo\$11b2ob3o2b3ob2o\$14b
2o4b2o2\$13bo8bo\$13bo8bo2bo\$13bo8bo2bo\$11bo12bo\$10bobo11b2o\$10bobo\$13bo
!``````
-Matthias Merzenich

muzik
Posts: 4170
Joined: January 28th, 2016, 2:47 pm
Location: Scotland

Re: c/8 orthogonal spaceships

Sokwe wrote:That's a nice looking partial pattern, although I haven't yet been able to get anything from it. There seem to be several ways for the blinkers to react to get the same outcome, which gives some hope of a solution:

Code: Select all

``````x = 30, y = 27, rule = B3/S23
2\$13bo8bo\$12bobo6bobo\$11bo2bo6bo2bo\$12b3o6b3o\$13b2o6b2o\$14bo6bo\$13b2ob
4ob2o\$14bobo2bobo\$13b4o2b4o\$14bo6bo\$11bo3bo4bo3bo\$11b2ob3o2b3ob2o\$14b
2o4b2o2\$13bo8bo\$13bo8bo2bo\$13bo8bo2bo\$11bo12bo\$10bobo11b2o\$10bobo\$13bo
!``````
Old thread I know, but can I suggest a name for it? Double Loafer

muzik
Posts: 4170
Joined: January 28th, 2016, 2:47 pm
Location: Scotland

Re: c/8 orthogonal spaceships

An interesting thing to note is that the copperhead, without its block, also decays into an interchange:

Code: Select all

``````x = 23, y = 42, rule = B3/S23
4\$3b3o6b3o3\$3bo2bo4bo2bo\$2bo3bo4bo3bo\$3bo2bo4bo2bo\$4b4o2b4o\$5b8o\$6bo4b
o\$6bo4bo\$6b2o2b2o\$8b2o\$3b2o8b2o\$2bo2bo6bo2bo\$3bobo6bobo\$4bo8bo11\$7bo2b
o\$4b2obo2bob2o\$6b2o2b2o2\$7b4o\$6b6o2\$7b4o\$8b2o!
``````
However, to bomb this party entirely too prematurely, the interchanges don't appear from exactly the same predecessors. They also appear in different places relative to the spaceship.

Nevertheless, I believe that the c/8 will rely on some sort of block hauling technology.

muzik
Posts: 4170
Joined: January 28th, 2016, 2:47 pm
Location: Scotland

Re: c/8 orthogonal spaceships

No more promising reactions found, which probably is a major fault of by hand searches.

There is a way to destroy this completely, moving the blinkers down by one spot, which could make for some eaters or new speeds:

Code: Select all

``````x = 14, y = 19, rule = B3/S23
2bo8bo\$bobo6bobo\$o2bo6bo2bo\$b3o6b3o\$2b2o6b2o\$3bo6bo\$2b2ob4ob2o\$3bobo2b
obo\$2b4o2b4o\$3bo6bo\$o3bo4bo3bo\$2ob3o2b3ob2o\$3b2o4b2o2\$2bo8bo\$2bo8bo\$2b
o8bo2\$2b3o4b3o!
``````