To use any of the following engines, you need a chess application compatible with the Open Exchange protocol.

This package provides the following open source engines:

Stockfish 11
Stockfish 20200926
Stockfish 20200926 NNUE

Stockfish is developed by Tord Romstad, Marco Costalba, Gary Linscott and Joona Kiiiski.
The engines are compiled by Peter Österlund and Bernhard C. März.
Stockfish Engines OEX is developed by Karl Schreiner.

Stockfish Engines OEX collection is released under the terms of the GNU General Public License v3
(GNU GPL v3). The source code is available from GitHub.