Spider is an orthogonal c/5 spaceship that was discovered by David Bell in April 1997. It is the smallest known c/5 orthogonal spaceship. Its side sparks have proven to be very useful in constructing puffers and rakes.
On March 7, 2019, Martin Grant found a 601-glider synthesis of spider, making it the first c/5 orthogonal spaceship to be synthesized. Optimizations have since been found to reduce the glider count.
- ↑ Martin Grant. Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Jeremy Tan. Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- 58P5H1V0.1 at Heinrich Koenig's Game of Life Object Catalogs