stockfish - free UCI chess engine, to calculate chess moves
This manual page documents the stockfish
is an UCI chess engine, to calculate chess moves
Stockfish is a free UCI chess engine derived from Glaurung 2.1. It is not a
complete chess program, but requires some UCI compatible GUI (like XBoard with
PolyGlot, eboard, Jose, Arena, in order to be used comfortably. Read the
documentation for your GUI of choice for information about how to use
Stockfish with your GUI.
This version of Stockfish supports up to 8 CPUs, but has not been tested
thoroughly with more than 2. The program tries to detect the number of CPUs on
your computer and set the number of search threads accordingly, but please be
aware that the detection is not always correct. It is therefore recommended to
inspect the value of the "Threads" UCI parameter, and to make sure
it equals the number of CPU cores on your computer. If you are using more than
four threads, it is recommended to raise the value of "Minimum Split
Depth" UCI parameter to 6.
This version of stockfish has experimental support for PolyGlot opening books.
For information about how to create such books, consult the PolyGlot
This program does NOT follow the usual GNU command line syntax, with long
options starting with two dashes.
Communication with UCI commands is documented by "The UCI Communication
Protocol" in /usr/share/doc/stockfish/engine-interface.txt.
stockfish was written by <Romstad Tord <email@example.com>> and
Marco Costalba <firstname.lastname@example.org>.
This manual page was written by Oliver Korff <email@example.com>, for the Debian
project (but may be used by others).