30P4H2V0

30P4H2V0
x = 14, y = 9, rule = B3/S23 b3o$o2bo6b3o$o4bo4bo2bo$3bobo2bo4bo$2o4bobobo$5bobo4b2o$3bo4bo$4bo5bo$ 9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 0 -1/2 THUMBSIZE 2 GPS 4 ]]
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Pattern type	Spaceship
Number of cells	30
Bounding box	14 × 9
Direction	Orthogonal
Period	4 (mod: 4)
Speed	c/2 | 2c/4
Heat	32.5
Kinetic symmetry	n
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B3/S23 – B3/S2378 # of rules 22 = 4 Isotropic rules B3/S2-cn3-eky – B34ceqt5-ijqr6-e7e/S234-ijnrw5-ijy6-ak78
Glider synthesis Fewest gliders 48† Catagolue-generated RLE synthesis Uploaded synthesis RLE 30p4h2v0_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext 30p4h2v0.cells RLE 30p4h2v0.rle
Identifiers apgcode xq4_0gggbqiezkig4igzxd547 Pentadecathlon ID 30P4H2V0.4

30P4H2V0 is a spaceship that maintains a singly skewed D2_+2 symmetry — an extremely unusual symmetry both in Life and in 2D square-grid CAs in general — in three out of its four phases.

Glider synthesis

It is one of the relatively few spaceships that can be constructed by gliders, though the best available still-life constellation seed for the final construction stage (found by Tanner Jacobi on 10 September 2015) is unusually complex.

Improvements to the synthesis have since been found.

External links

• 30P4H2V0 at Adam P. Goucher's Catagolue

• 30P4H2V0.4 at Heinrich Koenig's Game of Life Object Catalogs