Corner Mate in Chess: Pattern, Examples and Puzzles

Corner mate at a glance

Delivered by	A knight (check), with a rook or queen confining the king
The king	On a corner square
Key squares	For a king on h8: the heavy piece covers g8, g7 and h7, and the knight checks from f7 or g6
Compare	The Arabian mate, where the rook gives the check
Daily puzzles that use it	#13

How do you recognise a corner mate?

The king is on or near a corner, with few squares to go to.
A queen or rook can cover the squares beside the king, usually by landing on the next file with check.
A knight is one jump from a checking square. For a king on h8, those squares are f7 and g6.
Look for a first check that leaves the king only one move, into the corner. In the worked puzzle, Qg6+ leaves only Kh8 and the knight finishes with Nf7.
A pawn can seal the last escape square too, as Wikipedia notes.

Worked example from the daily puzzles

Each position comes from a real game in the open Lichess puzzle database and is checked before it is published. Set it up, look for the pattern, and only then read the solution.

Daily Chess Puzzle #13: White to play (rated 946)

Corner mate example: White to play after Kxg8

White to play. Black just played king takes on g8. It wins a rook, or so it seems. There is a forced mate here. Can you see how it starts?

Play it on Lichess before reading on: lichess.org/training/01IFr. Position (FEN): 6k1/pp6/1bpN3p/4P1p1/7q/3Q3P/PP4P1/7K w - - 0 29

Solution

Qg6+ — White: Queen to g6, check.
Kh8 — Black: King to h8.
Nf7# — White: Knight to f7, checkmate.

Queen to g6, check. The king cannot go to f7, because our queen on g6 controls that square. The king must move. King to h8. Now, knight to f7, checkmate.

Corner mate example, final position after Nf7#

Why this is a corner mate. Black's king is on h8. White's queen on g6 covers g8, g7 and h7, and the knight on f7 gives the check. No Black piece can capture the knight.

Full puzzle article, with the video: #13: Corner mate, Rook fork, Zugzwang and Pin

What are the common mistakes?

Checking in a way that lets the king run out of the corner. Before you check, make sure its only reply is into the corner.
Forgetting the knight's route. Count the jumps: the mate fails if the knight needs two moves to reach the checking square.
Defending: keeping the king on the corner with no defender for f7 or g6 (for a king on h8). The knight's check cannot be blocked, so those squares must be covered.

Corner mate FAQ

What is a corner mate?

A checkmate in which a rook or queen confines the king to a corner and a knight delivers the check. Lichess describes it as confining the king to the corner with a rook or queen and using a knight to deliver the checkmate.

How is the corner mate different from the Arabian mate?

In the Arabian mate the rook gives the check and the knight supports it. In the corner mate the rook or queen only confines the king, and the knight gives the check.

Why can't you block a knight's check?

A knight jumps over the pieces in between, so the only ways to answer its check are to capture the knight or move the king. In a corner mate neither is possible.

How can I practise a corner mate?

Work through the puzzles on this page, then try the daily puzzles linked below. RankUp Chess, an offline chess academy for kids, has a library of 5,000+ puzzles you can filter by difficulty and theme. It is free to play, with no ads and no subscription.

Related checkmate patterns

Arabian mate: A rook and a knight trap the king in a corner.
Morphy's mate: A bishop gives the mate while a rook and a pawn confine the king.
Anastasia's mate: A knight and a rook trap the king between the edge of the board and its own piece.

See every checkmate pattern

Every daily puzzle that uses a corner mate

#13: Corner mate, Rook fork, Zugzwang and Pin

Train checkmate patterns offline

RankUp Chess is an offline chess academy for kids: 5,000+ puzzles, 10 AI levels and lessons. Free to play forever, one payment unlocks it all. No ads, no subscription.

RankUp Chess. No ads, no subscription and it works offline.

See RankUp Chess

Sources. Definitions are written in our own words from Wikipedia: Checkmate pattern and Lichess puzzle themes. Puzzle positions come from the Lichess open puzzle database (CC0).