added optional alternate config for chess lib

moved chess rules to separate lib

fixed bishop + added pawn promotion + added move log

implemented bishop rules

introduced status codes for get_location to produce detailed error messages + added knight rules

completed pawn rules + bug fixes for 4-char-moves

fixed crucial bug where both players could move at the same time + added pawn rules (TODO: en passant)

(0) -10 -7 +7 +10 +30 tip

mercurial