Pufferfish spaceship

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Pufferfish spaceship
#C Pufferfish-based spaceship #C http://conwaylife.com/wiki/Pufferfish_spaceship x = 51, y = 32, rule = B3/S23 7bo7bo18bo7bo$6b3o5b3o16b3o5b3o$5bo2b2o3b2o2bo14b2obo5bob2o$5bo3bo3bo 3bo15b2obo3bob2o$6b2ob2ob2ob2o14bob2o7b2obo$6b2obo3bob2o13bobo2bobobob o2bobo$8bo5bo15bobo3b2ob2o3bobo$9b2ob2o17b3obo5bob3o$4b2o2bo5bo2b2o13b 3o7b3o$4b2o2bo5bo2b2o13b2o9b2o$32bo11bo$8bobobobo16b2o11b2o$8b2o3b2o 16b2o11b2o2$35b2o3b2o$19bo10bo4b2o3b2o$3bo14b3o8b3o14bo$2b3o3b2o3bobob 2obo7b2obo13b3o$b2o2bo2b2o9bo8b3o13b2obo$b4obo6bo3bobo8b3o13b2o$2o5bo 7b2o2b2o7b4o14b2o$bo16bo2bo6bo2bo11bo2b2o$bob3o2bo4bobo2b2o7b2o14bo4bo $bobo3b2o4bobo2b2o3bo4bobo11bo2bobo$b2o6bo2bo7bo2bo4b3o10b2o3b2o$o5bob o4bobo4bob2o16bo$b2o2bo2bo4bo6bob2o12bo4b2o$b2o3b2o7b2o3b2ob2o2b2o6b6o $24bo4bo4bobobobo7b3o$30bo3bo2bo9bo$30bo4bo10bo$29bo17bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 TRACKLOOP 72 0 -1/2 GPS 12 WIDTH 640 HEIGHT 640 ]]
Pattern type Spaceship
Number of cells 235
Bounding box 51×32
Direction Orthogonal
Period 36
Mod 36
Speed c/2
Speed (unsimplified) 18c/36
Heat 211.7
Discovered by Ivan Fomichev
Year of discovery 2014

A pufferfish spaceship (or puffership) is, generally, any spaceship constructed using pufferfish. The simplest would be to delete the puffed blocks with middleweight or heavyweight spaceships. The term may refer specifically to the extensible c/2 period-36 spaceship constructed by Ivan Fomichev in December 2014[1], the first such spaceship to contain no period-2 or period-4 parts. (The first two or three rows might be considered to be period 2 or 4, but they are directly dependent on following rows for support.)

The pattern consists of two adjacent pufferfish puffers, plus four copies of a nontrivial period-36 c/2 fuse for pufferfish exhaust, discovered using a randomized soup search. Nico Brown found additional puffership spaceship variants two days later.[2] Chris Cain found a 60-glider synthesis of an elongated pufferfish spaceship in February 2015.[3] More expensive syntheses of shorter pufferships were created by various Discord users in August 2020.[4][5][6] As of October 2020, the shortest and cheapest known puffership synthesis uses 51 gliders and was found by Dave Greene.[7]


  1. Ivan Fomichev (December 27, 2014). "Pufferfish and companions". Retrieved on September 15, 2018.
  2. Nico Brown (December 29, 2014). "Pufferfish and companions". Retrieved on September 15, 2018.
  3. Chris Cain (February 5, 2015). "Re: Small Spaceship Syntheses". Retrieved on September 15, 2018.
  4. Adam P. Goucher (August 10, 2020). Message in #cgol on the Conwaylife Lounge Discord server
  5. Dave Greene (August 10, 2020). Message in #cgol on the Conwaylife Lounge Discord server
  6. Goldtiger997 (August 11, 2020). Message in #cgol on the Conwaylife Lounge Discord server
  7. Dave Greene (October 12, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums

External links