“Stockfish 14 is now at least 400 Elo ahead of Stockfish 7, a top engine in 2016.”
Stockfish trained its new net on billions of positions from Leela Chess Zero, its biggest open-source rival. The two projects shared data instead of suing each other. The result wins four times more game pairs than it loses against the previous release. Volunteers with donated hardware keep lapping the corporate labs.