Morphy's Mate

In the final position of Morphy's Mate, a bishop checks the cornered king along the long diagonal while a rook controls the file next to the king to cut off any escape. The name is often mixed up with Pillsbury's Mate, which uses the same two pieces, and sources draw the boundary slightly differently. On this site we classify by the representative final position: if the bishop delivers the last check it is Morphy's, if the rook does it is Pillsbury's.

Below is the representative position. The white bishop on b2 checks the h8 king along the a1-h8 diagonal and mates. The escape squares g8 and g7 are controlled by the rook on g1, and h7 is occupied by Black's own pawn.

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How often does it show up

Of the 212,300 puzzles in this site's database, 314 (0.1%) carry the Morphy's mate tag (counted August 2026). 49.0% sit below rating 1200 and 13.1% at 1900 or above.

6.7% carry the sacrifice tag, against 44.4% for Anastasia's mate and 23.5% for the Opera mate. Named mates do not share one profile on that axis. 44.6% are tagged mate in one, so a large share of these are single-move finishes once the position is reached.

Why it is mate

The h8 king has only three adjacent squares, and all of them fail.

• g8: attacked by the rook on g1 along the g-file.
• g7: attacked by the rook, and swept by the bishop's diagonal as well.
• h7: occupied by Black's own pawn.

What about blocking? The bishop's checking line runs six squares from b2 to h8, so a defender with a spare piece could interpose. Here Black has no such piece, and nothing attacks the bishop on b2 either. So the check cannot be blocked or removed, the rook covers both g8 and g7, the defender's own pawn seals h7, and two white pieces are enough to cover all three escape squares.

The long diagonal cuts both ways

Checking from far away is the strength of this pattern, but the same geometry defines how it fails: the longer the checking line, the more squares where something can stand in the way.

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A single knight on e5 turns h8 into a safe square. But the defender has a condition to meet too: a blocker that nobody defends blocks nothing for long. The knight above is unprotected, so with White to move, Bxe5 brings the check back along the same diagonal - and in this position that capture is itself checkmate. So the defender should block with a defended piece, and the attacker should check from a square where the bishop cannot be taken.

The attack: herd with the rook, finish with the bishop

The bishop delivers the check in the final position, but a rook check is the usual tool for building that position. While the king still stands on g8 the long diagonal does not touch it, so in practice the attack often runs: check on the g-file to drive the king into the h8 corner, then the bishop check to finish. Below is the last move after the herding is done. Use ▶ to replay it.

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The bishop steps from c1 to b2 and checks the h8 king from the far end of the diagonal. The rook does not move - control of the g-file was secured during the herding phase. If the rook leaves that post, g8 opens and the mate disappears, so give the rook no other job until the end.

A surviving f7 pawn changes everything

In the representative position Black had only the king and the h7 pawn. Straight out of castling there would normally also be an f7 pawn and an f8 rook - and with those on the board, driving the king to the corner and playing the same bishop check produces a different result.

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f6 lies on the diagonal running from b2 to h8. Black breaks the check by pushing a pawn one square. It is Black's only legal move here, and it is enough. The f8 rook cannot help: its route to f6 runs through f7, where its own pawn stands.

This is exactly where the two patterns diverge in practice. In Pillsbury's Mate that same f7 pawn is an accomplice: it occupies one of the king's escape squares, and when the rook checks down the g-file the pawn cannot get near the checking line to help. In Morphy's Mate the identical pawn becomes a defensive resource in one move. The difference comes from how pawns move. A pawn advances along its own file, so it cannot step into the g-file to block a rook check, but it can step onto a diagonal that crosses its file. A long diagonal is cut by filling any one of the five squares between bishop and king.

So when you play for Morphy's Mate, first check whether the defender can occupy a square on the diagonal. Watch f6 in particular: pawns, knights, and rooks can all reach it.

Where the name comes from

The pattern is named after Paul Morphy (1837-1884), but the checkmate was never actually played in the Morphy game the name refers to - a position that could have led to it arose, and a different continuation was chosen. Morphy himself is better known for a real-game example of the Opera Mate, where the rook mates on the back rank. So rather than "a mate Morphy played often", it is more accurate to understand this as the rook-and-bishop pattern that carries Morphy's name.

Defending against it

• Do not leave the long diagonal open. A defended pawn or piece on the diagonal means there is no check at all. When you move a pawn off that diagonal, count the line that opens behind it.
• Fight for the g-file. Putting your own rook on it and forcing a trade makes both the herding and the finish much harder.
• Treat the h7 pawn deliberately. In this pattern it takes away the king's own escape square, but pushed one square early, it frees that square instead. Which is better depends on where the attacker's pieces are aimed.

Versus Pillsbury's Mate

The roles are reversed: in Morphy's the bishop checks and the rook controls the file, in Pillsbury's the rook checks and the bishop controls the corner. In a real attack the two shapes can appear in one sequence - a rook check drives the king into the corner, and the bishop ends it. See the comparison table on the Pillsbury's Mate page for details.

References

• Chessfox, Morphy's Mate - definition and origin (the mate never occurred in the game it was named after; the Opera Mate connection). https://chessfox.com/morphys-checkmate/
• DailyChess, Morphy's Mate - definition (bishop checks, rook controls the file). https://www.dailychess.com/checkmate-pattern/morphys-mate
• Statistics produced by scripts/analyze-theme-stats.mjs --theme morphysMate; the run is recorded in docs/data/morphysMate-stats.md.

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Related: Pillsbury's Mate · Balestra Mate · All tactics