Assertion: checkmate | /r/HasProperty | other material
Facets:
value: on the board
type: LOCATION
Source sentences:
text: There are also positions in which a king and a knight can checkmate a king and a bishop, knight, or rook; or a king and a bishop can checkmate a king with a bishop on the other color of squares or with a knight, but the checkmate cannot be forced if there is no other material on the board (see the diagrams for some examples).