python-chess v0.13.1 Changes: * Missing *SetUp* tags in PGNs are ignored. * Incompatible comparisons on `chess.Piece`, `chess.Move`, `chess.Board` and `chess.SquareSet` now return *NotImplemented* instead of *False*. Minor new features: * Factored out basic board operations to `chess.BaseBoard`. This is inherited by `chess.Board` and extended with the usual move generation features. * Added optional *claim_draw* argument to `chess.Base.is_game_over()`. * Added `chess.Board.result(claim_draw=False)`. * Allow `chess.Board.set_piece_at(square, None)`. * Added `chess.SquareSet.from_square(square)`.