stockfish - free UCI chess engine, to calculate chess moves
This manual page documents the stockfish command.
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
This version of stockfish has experimental support for PolyGlot opening
books. For information about how to create such books, consult the
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 <firstname.lastname@example.org>> and
Marco Costalba <email@example.com>.
This manual page was written by Oliver Korff <firstname.lastname@example.org>, for the
Debian project (but may be used by others).
October 10, 2009