Comma-pusher
| Comma-pusher | |||||||||
| View static image | |||||||||
| Pattern type | Tagalong Spaceship | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 53 | ||||||||
| Bounding box | 14 × 14 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 4 | ||||||||
| Mod | 2 | ||||||||
| Speed | c/2 | 2c/4 | ||||||||
| Heat | 58.0 | ||||||||
| Discovered by | Unknown | ||||||||
| Year of discovery | Unknown | ||||||||
| |||||||||
| |||||||||
| |||||||||
Comma-pusher can refer to one of six period-4 c/2 orthogonal spaceships which consist of a comma escorted from behind by two middleweight spaceships, and two other standard spaceships in front.
They functionally resemble the hivenudgers, a class of spaceships which similarly escort a pre-beehive, and the hooknudgers, which escort a hook.
As of July 2023, none of the six comma-pushers have been synthesised.
Variants
Two standard spaceships are required to be at the front of the comma to escort it. Any of the three types of spaceships can be mixed and matched at will. Unlike with big A, the middleweight spaceship offers only one valid type of support, rather than two, as the middleweight spaceship's "upper" dot spark cannot be used without the spaceship conflicting with the one behind.
| Image | Min. population | Supporting spaceships | apgcode | Cost in gliders | |
|---|---|---|---|---|---|
|
53 | LWSS | LWSS | xq4_i1hfxi1hfzocog0emwocogz0773y2773 | No synthesis known |
|
56 | LWSS | MWSS | xq4_422uw8211vzhohwsc10hogz1ef7w1w1ef7 | No synthesis known |
|
58 | LWSS | HWSS | xq4_844swo211vz2g210oo202hz3tve012w3tve | No synthesis known |
|
58 | MWSS | MWSS | xq4_06rusx6ruszggh1g8cwhhgzfg0h71xfg0h4 | No synthesis known |
|
60 | MWSS | HWSS | xq4_0onve0g8wonvez0818g033808hz1488fw38ggv | No synthesis known |
|
62 | HWSS | HWSS | xq4_0onve0g8wonvez0818g033808hz38ggvw38ggv | No synthesis known |
See also
External links
- The 6 four-spaceship comma-pushers at Mark D. Niemiec's Life Page