Morphy's mate

In Morphy's mate, the king is near a corner and one of its own pieces, usually a pawn, removes an escape square. The bishop gives the final check along a diagonal, while the rook controls the row or column through which the king might otherwise move away.

The Bishop in Command

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The bishop gives check along the f6-g7-h8 diagonal, which also controls g7.

The Diagonal Decides on h8

Three distinct functions close the cornered king's three neighboring squares.

1. The bishop gives check along the f6-g7-h8 diagonal, which also controls g7.
2. The rook on g1 controls g8 along the g-file without being the checking piece.
3. Black's pawn on h7 occupies the remaining escape square and helps confine its own king.

The pattern works because the rook and bishop cover complementary directions. The rook builds a straight wall, and the bishop crosses that wall diagonally to attack the king. A defending piece that blocks a nearby square ends up helping complete the checkmate pattern.

To recognize the pattern, identify which piece actually gives check. That separates it from Greco's mate, where a rook or queen normally checks and the bishop covers an escape square.