A corner mate is a checkmate in which a rook or queen confines the king to the corner of the board and a knight delivers the mate. The king is usually on the edge of the board, in the corner or close to it, boxed in by its own pawns. Every puzzle on this page ends in a corner mate, comes from a real game and is close to your puzzle rating.
Take a black king on h8 with its own pawn on h7. The king has only two other squares, g8 and g7, and both are on the g-file. A white rook on an open g-file covers them both. Now a white knight lands on f7 and gives check. The king cannot move, a knight check cannot be blocked, and nothing can capture the knight on f7. That is mate.
Here is a full position. White has a king on c1, a rook on g1, a knight on e5 and pawns on a2, b2, f2 and h2. Black has a king on h8, a rook on a8 and pawns on a7, b7 and h7. White plays 1.Nf7#. The rook covers g7 and g8 along the open file, the pawn on h7 takes the king's last square, and the knight is not next to the king, so the king cannot take it. The black rook on a8 cannot reach f7 either.
Notice how little each piece does. The rook never gives check. It only builds the fence. The knight does not need support, because a knight checks from two squares away and the king can never capture it.
Several mates use a knight near the corner, and the difference is which piece gives the final check. In a corner mate the knight gives it and the rook or queen only guards squares. In an Arabian mate it is the other way round: the rook gives check right next to the king and the knight defends it and covers another square. In a smothered mate the knight needs no helper at all, because the king is walled in completely by its own pieces. Anastasia's mate usually happens on the edge rather than in the corner, with the knight covering squares and a rook or queen mating along the edge file.
Look for three things together: an enemy king in or near the corner, a file or rank next to it that your rook or queen controls, and a knight within one jump of a checking square. For a king on h8, the knight checks from f7 or g6. For a king on h1, from f2 or g3. The same pattern works in every corner.
The fence often exists before the puzzle starts, because a rook on an open file next to a castled king is a common sight. What the puzzle asks you to find is the route for the knight, and sometimes a first move that removes the piece guarding the knight's landing square.
The defence is space. A king in the corner with its pawns unmoved has very few squares, and one rook on the next file takes most of them. Keeping a piece that controls the knight's checking squares, or blocking the open file next to your king, removes the danger. When an enemy rook settles on the file beside your cornered king, count the knight checks before you do anything else.
The attacker's usual mistake is checking with the knight from a square where a defender can capture it, or before the fence is in place, which just sends the king out of the corner. The defender's mistake is thinking a king in the corner is safe because no queen is near. A rook and a knight are enough.
Most corner mate puzzles are short, so they are good for building fast recognition. If you are stuck, the hint shows the piece first, which is usually the knight; your job is then to find its square. Once solved, the full line appears beside the board. Train alongside Arabian mates and smothered mates to learn the difference, and see the checkmate patterns page for the full set.
For mixed tactics at your level, use Puzzle Training. For speed, try Puzzle Storm, and to repeat a fixed set until it is automatic, the Woodpecker Method. Elo Maxing rates you on every tactical motif and serves the weakest next, and Pattern Drill builds practice from the patterns your own games show you miss. For more on how rated solving works, read rated chess puzzles explained.
A checkmate where a rook or queen confines the king to the corner of the board and a knight delivers the mate.
In a corner mate the knight gives the final check. In an Arabian mate the rook gives the check and the knight supports it.
No. In a corner mate the rook or queen only covers the king's escape squares. The check comes from the knight.
Do not let an enemy rook or queen control the file or rank next to your cornered king, and watch the squares a knight could check from.