Jellyfish is a chess engine developed by Mike Dokken. It supports both UCI and Xboard protocols.


Development of Jellyfish started in August of 2012. It was written from scratch and is not a clone of another engine. In August of 2013 Jellyfish got an account on ICC with the handle Jellyfish and has played there occasionally. The first public version, Jellyfish 1.0, was released on November 10, 2013.

Future Changes

- add ponder
- add endgame tablebase support
- improve evaluation and search


Jellyfish 1.0 (11-10-13)
Initial release. (64-bit)

Jellyfish 1.1 (4-21-15)
Added multithreaded search.
Added support for 64-bit Windows and Linux.