LICENCES
Checkmate, GPL abusers!
Chess engine Stockfish files lawsuit against ChessBase over GPL 3 violations.
Throughout history, chess has seen fierce rivalries play out, but perhaps none like this. The open source Stockfish chess engine has filed a lawsuit against ChessBase, accusing it of violating the GPL 3 licence Stockfish is shared under, with ChessBase’s Fat Fritz 2 chess engine. This, the Stockfish team claim, is a derivative of Stockfish, but with some new lines of code and proprietary features.