Assertion: checkmate's piece | /r/CapableOf | force checkmate
Facets:
value: easily
type: MANNER
value: on the edge of the board
type: LOCATION
Source sentences:
text: Two major pieces (queens or rooks) can easily force checkmate on the edge of the board using a technique known as the ladder checkmate.
text: If White runs out of time, Black would not win because it has no pieces to force checkmate.