- Any piece that is attacked, but which cannot escape capture by moving away,
- capturing the attacking piece, or interposing the attacking piece is
- considered to be mated, and is removed from the board.
- Note that such a move does not need to be played: if a piece is attacked
- but not mated, it is not removed.
+ If a piece is attacked and no orthodox move can prevent its (normal) capture,
+ it is considered to be mated and is removed from the board.
+ If such an orthodox move exists, it doesn't have to be played
+ (it could even be illegal because normal captures are forbidden):
+ the piece is not captured.