37P4H1V1.2

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37P4H1V1.2
x = 18, y = 18, rule = B3/S23 13b2o$13bobo$13bo$16bo$15bobo$15bobo$15bo$15bo$11bo3bo$10b3obo$9b2o$8b 2o$9bo$3o$o8bo$bo2b5o$3bo$4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 -1/4 -1/4 THUMBSIZE 2 GPS 4 ]]
Pattern type Tagalong
Spaceship
Number of cells 37
Bounding box 18 × 18
Direction Diagonal
Period 4 (mod: 4)
Speed c/4 | c/4
Heat 37.5
Kinetic symmetry /
Discovered by Hartmut Holzwart
Year of discovery 2004

37P4H1V1.2 is one of the two known period-4 c/4 diagonal spaceships with 37 cells. Excluding pseudo-objects, it is the smallest known spaceship with diagonal mirror symmetry in terms of both bounding box and minimum population.

On July 20, 2025, Goldtiger997 found a final synthesis step for this spaceship, and KtT used it to complete a 49-glider synthesis.[1][2]

See also

References

  1. ↑ KtT (July 20, 2025). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  2. ↑ shinjuku (#10748376515) (July 20, 2025). Job triggered by Adam P. Goucher at GitLab Catagolue project.