Morphy's mate
Morphy's mate is a checkmate against a king in the corner in which a bishop gives check along the long diagonal while a rook controls the neighboring file, and the king's own pawn blocks the last flight square.
The bishop is the checking piece in this pattern. It strikes the king on h8 along the a1-h8 diagonal and also covers g7. The rook stands on the g-file, where it takes g8 and adds a second guard to g7. The king's own pawn on h7 removes the last square, and with g7 covered nothing can step in between. That division of labor, bishop checking and rook guarding, is what separates it from Pillsbury's mate, where the rook gives the check.
The pattern grows out of attacks in which the defender's g-pawn has been exchanged or destroyed, leaving the king on h8 beside an open g-file. Once a rook controls that file, any bishop check on the long diagonal becomes a serious threat, so the attacker's task is to find a safe route for the bishop, often with a capture or a sacrifice on f6.
For the defender, the warning signs are an open g-file and an enemy bishop that can reach the long diagonal. Contesting the g-file with a rook, keeping a piece ready to block on g7, or pushing the h-pawn to give the king h7 all break the net.
The quiet piece goes in first. If the bishop checks before the rook controls the g-file, the king simply walks to g8.
Compare it with Opera mate. An opera mate is a back-rank checkmate in which a rook delivers mate on the eighth rank while a bishop guards that rook and also controls the square in front of the king.
Compare it with Battery. A battery is two of your pieces lined up on one file, rank or diagonal, with the rear piece backing up the front one so that both press on the same target.
To see how often "Morphy's mate" or a pattern like it decides your own games, book a first lesson: George Li reviews your games and writes a study plan around what he finds.
Related terms
A back rank mate is a checkmate on a player's first or eighth rank, typically by a rook or queen, delivered when the king's own pawns leave it no square to step to.
Pillsbury's mate is a checkmate in which a rook checks along the g-file while a bishop on the long diagonal covers g7 and h8, leaving a king on g8 hemmed in by its own pieces.
A mating attack is a sustained assault on the enemy king, usually built from several pieces and often with sacrifices, whose aim is checkmate rather than winning material.
A mating net is a setup in which the enemy king is surrounded by attackers and its own pieces so tightly that checkmate cannot be avoided, even if the final blow is a move or two away.
A battery is two of your pieces lined up on one file, rank or diagonal, with the rear piece backing up the front one so that both press on the same target.
A combination is a forcing sequence of moves, usually built from sacrifices and checks, in which every move leaves the opponent few or no choices and the sequence ends in a concrete gain such as mate or material.
Guides that go further
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