Edge-repair spaceship 1

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Edge-repair spaceship 1
8bo7b$7b4o5b$2bo3bo3b2ob2ob$b4o5bo2b2ob$o3bo7bo2bo$bobo2bo9b$5bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 3 0 -1/3 THUMBSIZE 2 GPS 3 HEIGHT 400 ]]
Pattern type Spaceship
Number of cells 26
Bounding box 16×7
Direction Orthogonal
Period 3
Mod 3
Speed c/3
Speed (unsimplified) c/3
Heat 20.7
Discovered by David Bell
Year of discovery 1992

Edge-repair spaceship 1 is a c/3 orthogonal edge-repair spaceship that was found by David Bell in 1992. It was the first edge-repair spaceship to be discovered, though the usefulness of its edge-repair property was not recognized until July 1997. This edge repair spaceship can be used to perturb various debris from puffers to create puffers or spaceships of different periods. Edge repair spaceships can also remove some stationary objects, most notably, two edge-repair spaceships can delete a block. The edge-repair component of this ship is used in much of the known c/3 technology, although one sometimes has to use a different ship to allow the edge-repair component to be accessible.

The extremely similar 25P3H1V0.2, also found by Bell in 1992, is displayed below. It is notable because it contains a minimum of only 25 cells, making it tied with 25P3H1V0.1 as the smallest c/3 spaceship.[1] 25P3H1V0.2 also retains its edge-repair property. A 30-glider synthesis of this ship was found by Martin Grant on December 15, 2017.[2]

Image gallery

RLE: here
From left to right, edge-repair spaceships delete a Herschel, pre-beehive, block, and tumbler
Download RLE: click here

See also


  1. c3.rle from Stephen Silver's January 12, 2004 'ships' collection.
  2. Martin Grant (December 15, 2017). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums

External links

  • 26P3H1V0.1 at Heinrich Koenig's Game of Life Object Catalogs
  • 25P3H1V0.2 at Heinrich Koenig's Game of Life Object Catalogs