Schick engine

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Schick engine
bo2bo15b$o19b$o3bo15b$4o9b2o5b$6b3o5b2o4b$6b2ob2o6b3o$6b3o5b2o4b$4o9b 2o5b$o3bo15b$o19b$bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 12 -1/2 0 THUMBSIZE 2 GPS 4 ]]
Pattern type Tagalong
Number of cells 39
Bounding box 20×11
Direction Orthogonal
Period 12
Mod 12
Speed c/2
Speed (unsimplified) 6c/12
Heat 43.2
Discovered by Paul Schick
Year of discovery 1972

Schick engine (or Schick ship) is a period-12 c/2 orthogonal spaceship found by Paul Schick in 1972. Alternatively, it may refer just to the tagalong (displayed in green) that is attached to the back of the two lightweight spaceships. The tagalong may also be attached to the back of two middleweight spaceships, two heavyweight spaceships, or a lightweight spaceship and a heavyweight spaceship.

Its eleven-cell rear spark can be perturbed by other c/2 spaceships to form a variety of puffers and thus it is a puffer engine.[1]

The Schick engine first appeared naturally on February 12th, 2019,[2] having previously emerged (along with its middleweight and heavyweight variants) from symmetric soups on Catagolue.[3][4][5] A second natural Schick engine appeared in October 2020.[6]

An 11-glider synthesis for the variant with two lightweight spaceships was found by Douglas G. Petrie in 1973.[7]

Tagalong in green

See also


  1. Robert Wainwright (March 1973). "Lifeline Volume 9". Lifeline page 5.
  2. Adam P. Goucher (February 12, 2019). Re: Soup search results (discussion thread) at the forums
  3. Richard Schank (December 14, 2014). Re: Soup search results (discussion thread) at the forums
  4. Richard Schank (March 10, 2015). Re: Soup search results (discussion thread) at the forums
  5. gmc_nxtman (March 20, 2016). Re: Soup search results (discussion thread) at the forums
  6. bubblegum (October 5, 2020). Re: Soup search results (discussion thread) at the forums
  7. Robert Wainwright (September 1973). "Lifeline Volume 11". Lifeline page 19.

External links

  • 39P12H6V0.1 at Heinrich Koenig's Game of Life Object Catalogs