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.

goldenratio found a final step for a synthesis of this spaceship on January 24, 2021, which bubblegum made a complete synthesis out of soon after.[1] Various improvements were posted over the next few days,[2][3][4][5] eventually making ERS1 the cheapest period-3 spaceship to synthesize as of January 27.[6]

Image gallery

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

See also


  1. bubblegum (January 24, 2021). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  2. Goldtiger997 (January 25, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  3. Tanner Jacobi (January 26, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  4. Goldtiger997 (January 26, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  5. Goldtiger997 (January 27, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  6. Adam P. Goucher. "Census". Catagolue. Retrieved on January 27, 2021.

External links

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