Assertion: checkmate's piece | /r/HasProperty | pinned to the king
Facets:
value: by the attacking piece
type: OTHER
Source sentences:
text: Likewise, a piece that is pinned to the king cannot capture the checking piece if such a move would place the king in check from the pinning piece.
text: A piece unable to move because it would place its own king in check (it is pinned against its own king) may still deliver check to the opposing player.
text: (The blocking piece is then pinned to the king by the attacking piece.)