🕶️ The logo of this libre chess engine, a fish on a marble floor 📚️ Stockfish is a libre, multi-platform chess AI (an AI specialized in this type of game), derived from Glaurung 2.1. It is ranked among the best in the world (estimated power of 4039 Elo for v.16, ranked 1st out of 106 candidates in the "CCRL 40/2 - All engines (best versions only)" of February 28, 2024), communicating with the UCI protocol (the most common protocols are CECP aka Winboard/Xboard, and UCI). Its algorithm is "alpha-beta pruning". Another superb gift to the Open Source community!