Assertion: checkmate | /r/HasProperty | forced
Facets:
value: without using either method
type: MANNER
value: from positions with different material
type: OTHER
Source sentences:
text: Checkmates are possible with the defending king on any square at the edge of the board, but can be forced only from positions with different material or if the defending king is in a corner controlled by the bishop or on a square on the edge next to a corner, but mate adjacent to the corners not controlled by the bishop is only two moves deep (with the same material), so is not generally encountered unless the defending side plays inaccurately.
text: Checkmate can be forced without using either method to complete the mate.
text: Insufficient material (no checkmates are possible or no checkmates can be forced):
text: The reason that checkmate can be forced is that the pawn gives the defender a piece to move and deprives him of a stalemate defense (Müller & Lamprecht 2001:19–20).