stockfish: stockfish (UCI chess engine) stockfish: stockfish: Stockfish is a free UCI chess engine derived from Glaurung 2.1., stockfish: requireing some UCI-compatible GUI (e.g. XBoard with PolyGlot or stockfish: eboard). stockfish: It has support for Syzygybases and supports up to 128 cores. stockfish: The engine defaults to one search thread, so it is therefore stockfish: recommended to inspect the value of the Threads UCI parameter, and stockfish: to make sure it equals the number of CPU cores on your computer. stockfish: stockfish: https://stockfishchess.org/