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x = 18, y = 16, rule = B3/S23 5o$o4bo7b2o$o11b2ob3o$bo9b2ob4o$3b2o3b2ob2o2b2o$5bo4bo2bo$6bobobobo$7b o$7bo$6bobobobo$5bo4bo2bo$3b2o3b2ob2o2b2o$bo9b2ob4o$o11b2ob3o$o4bo7b2o $5o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 ZOOM 10 TRACKLOOP 4 -1/2 0 ]]
Pattern type Spaceship
Number of cells 76
Bounding box 18×16
Direction Orthogonal
Period 4
Mod 4
Speed c/2
Speed (unsimplified) 2c/4
Heat 90.0
Discovered by Hartmut Holzwart
Year of discovery Unknown

Hammerhead is an orthogonal c/2 spaceship found by Hartmut Holzwart[1] no later than September 1995. Alternatively, hammerhead may refer to just the front half of this spaceship (in particular the leftmost nine columns of the form shown below), which can be extended to a c/2 spaceship in a variety of ways.

Image gallery

Hammerhead may refer just to the leftmost 9 columns of generation 3, shown here in green


  1. Alan Hensel's lifep.zip pattern collection. Retrieved on March 7, 2022.

External links