The Arabian Mate is a classic pattern in which a knight and a rook combine to checkmate a king trapped in the corner of the board.
The knight sits a knight’s-move from the corner — on f6 against a king on h8 — covering g8 and the square the rook stands on. The rook then delivers check from the seventh rank or the corner file, and the king is boxed in.
It’s one of the oldest mates known, dating back to the medieval Arabic form of the game, which is how it got its name. The two pieces work as a team: the knight guards, the rook strikes.
Because the knight defends the rook, the king can’t even capture its way out. Whenever an enemy king is shoved into the corner with your knight and rook nearby, check whether this picture is one move away.
It comes from shatranj, the medieval Arabic form of chess, where this knight-and-rook corner mate was a well-known finish.
The knight covers the one diagonal flight square and also defends the rook, so the king can neither run nor capture the checking piece.
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