A knightship is a spaceship of type (2m,m)/n (that is, a spaceship that moves two cells horizontally for every one cell it moves vertically).
Alternatively and in a looser sense, 'knightship' is colloquially used to refer to any oblique spaceship; we refrain from using this broader definition here.
Knightships must be asymmetric and their period must be at least 6, which makes searching for them using programs like lifesrc very difficult.
An elementary would-be knightship, dubbed "almost knightship" was found by Eugene Langvagen on March 23, 2004, which would be a period-6 knightship if it weren't for two cells that are incorrect in its sixth generation.
- "PLife Home Page". Retrieved on May 22, 2009.
- Dave Greene. Re: Shrinking Gemini: Four Ideas (discussion thread) at the ConwayLife.com forums