|View animated image|
|Number of cells||44|
|Discovered by||Richard Schank|
|Year of discovery||2014|
Pufferfish is a puffer discovered by Richard Schank in 2014. Having been found in a symmetric soup, the puffer is almost natural. It consists of a pair of b-heptominos whose debris is stabilised by a backend.
It is the first known c/2 object that doesn't have any parts of periods 2 or 4.
On December 27, 2014 Ivan Fomichev found a non-trivial (dependent) c/2 fuse of period 36 for pufferfish's exhaust, that enabled him to assemble the first wholly high-period c/2 spaceship and rake. A few days later Nico Brown found some smaller rakes.
Chris Cain found a 60-glider synthesis of a pufferfish-based spaceship in February 2015. Versions with arbitrarily increased length and population are trivially constructible at the same total cost in gliders.
- Richard Schank (November 24, 2014). "Re: Soup search results". Retrieved on November 25, 2014.
- Ivan Fomichev (December 27, 2014). "Pufferfish and companions". Retrieved on December 28, 2014.
- Nico Brown (December 29, 2014). "Re: Pufferfish and companions". Retrieved on December 29, 2014.
- Chris Cain (November 27, 2014). "Re: Soup search results". Retrieved on February 2, 2015.
- Ivan Fomichev (January 8, 2015). "Re: Pufferfish and companions". Retrieved on February 2, 2015.
- Chris Cain (February 10th, 2015). "Re: Small Spaceship Syntheses". Retrieved on June 15, 2015.