Changes

A '''Pseudo-Legal Move''' is legal in the sense that it is consistent with the current [[Board Representation|board representation]] it is assigned to, and it must be member of all pseudo legal [[Move Generation|generated]] moves for that [[Chess Position|position]] and [[Side to move|side to move]]. For a test of a given but not already generated move, the moving [[Pieces|piece]] on its valid origin [[Squares|square]] of the [[Chessboard|board]] must have a valid target square according to its possible move [[Direction|directions]] and [[Distance|distances]]. The [[Occupancy|occupancy]] of the target square in conjunction with its piece [[Color|color]] (if any piece), or in case of distant sliding moves and double pawn pushes, the occupancy of squares between origin and target must be further considered, to determine the move is pseudo legal [[Quiet Moves|quiet]] or [[Captures|capture]] (including [[Promotions|promotion]]). [[En passant]] needs the target square trigger set from previous double push and special square tests. [[Castling]] requires appropriate [[Castling rightsRights|castling rights]], [[Occupancy|occupancy]]- and attacking square checks.