Assertion: checkmate's piece | /r/CapableOf | attack the king
Facets:
Source sentences:
text: The piece that is attacking the King can be captured.
text: When a king is threatened, you should verbally say “check” to inform the opponent that their king must move or the piece threatening the king must be removed from the board.
text: When a player has their king en prise, they must move it or capture the piece attacking their king.
text: When this happens, the king must move, or the piece attacking the king must be captured.
text: - You can't take the piece that's attacking the king, or
text: So if "there is no legal moves" that the king "can make", but if a knight can get in the way of the piece that is threatening the king, then this is not checkmate.
text: If the checking piece threatens the king, the king can capture the piece if the king does not move into a new check (i.e. if the piece is not protected by another enemy piece).