ChessA smothered mate is when every square next to the king is taken by its own pieces, and the enemy gives check with a single knight. The king can't move and nobody can block. A knight's check can never be blocked anyway (it jumps over things), so once the king is "smothered" by its own side, one knight is enough. When you play chess online free and see the enemy king huddled in a corner surrounded by its own pieces, think of this one.
The pattern
The classic smothered mate happens in the corner: the black king is on h8, next to its own rook and two pawns.
Square by square:
- g8: its own rook.
- g7, h7: its own pawns.
- The knight on f7: no black piece can capture it, and a knight's check can't be blocked.
The king's "bodyguards" have become its prison cell. Smothered mates are almost always done by knights, because only a knight's check can't be blocked.
How it happens in real games
The classic combination: queen sacrifice, then smothered mate
This is the most famous combination of all. One story says it was recorded in chess books hundreds of years ago, and it later came to be called "Philidor's Legacy." White checks twice with the knight to drive the black king back into the corner, then offers the queen on g8 to the black rook, so the rook blocks the last square itself:
Step by step:
- The knight goes to f7 with check, and the black king has to go to g8 (the knight on f7 blocks the white queen's diagonal, so g8 is safe for now).
- The knight jumps to h6. The knight gives check, and it also gets out of the queen's diagonal, so the queen gives check too. That's a double check. In a double check only the king can move, and f8 is covered by the rook on f1, so the king has to go back to h8.
- The queen charges to g8 with check. The king can't take her (the knight on h6 protects her), so the rook has to.
- Once the rook takes, g8 is plugged by Black's own rook, and the knight returns to f7. Smothered mate.
Smothered mate in the opening
The Caro-Kann Defense has a famous trap where a black knight blocks its own king, and one white knight jump ends the game.
Next to the black king, d8 holds the queen, f8 the bishop, d7 a knight, and e7 and f7 pawns. The e7 pawn could normally take the knight on d6, but if it moved, the white queen would attack the king straight down the e-file, so it can't. Opening smothered mates are almost always "your own pieces block your king" plus "the only piece that could take the knight is pinned." For more Caro-Kann lines, see the Caro-Kann Defense.
How to avoid it
- Don't pack your own pieces all around your king. Especially a king in the corner: leave one empty square next to it, and a smothered mate is much harder to pull off.
- Watch where the enemy knights can land. If an enemy knight is one jump from your king, check that square first.
- Beware of double checks. A double check forces a king move, and it's the best way to drive a king into the corner.
- If your opponent offers you his queen, calculate first. After you take, will your own piece be plugging your king's last square?
Practice puzzles
Show answer
1... Nf2# The black knight jumps to f2 with check. Next to the white king, g1 holds a rook and g2 and h2 hold pawns, and no white piece can take the knight on f2. Smothered mate.
Show answer
8... Nd3# The black knight jumps to d3 with check. Around the white king, d1, d2, e2, f1 and f2 are all taken by White's own pieces. The e2 pawn could take the knight, but it's pinned by the black queen on e7: if it moves, the white king is in check. Smothered mate.
Show answer
1. Qg8+ Rxg8 2. Nf7# The queen charges to g8 with check. The king can't take her (the knight on h6 protects her), so the rook has to. Once the rook is on g8, the king is completely surrounded by its own pieces, and the knight returns to f7. Smothered mate. These are the last three moves of the classic combination above.
FAQ
Does a smothered mate have to use a knight?
Almost always. A check from a rook, bishop or queen can be blocked, and when the king is surrounded, there's usually a piece that can block. Only a knight's check can't be blocked, so smothered mates are almost always done by knights.
What is "Philidor's Legacy"?
It's the combination above: the knight checks twice, the queen is offered on g8, and the knight gives smothered mate. It's named after the 18th-century player Philidor, but one story says even older chess books already recorded it.
Why are there so many smothered-mate traps in the opening?
In the opening, both sides' pieces are still crowded around the king, so it's easy for a king to get packed in by its own side. If the only piece that could take the knight also happens to be pinned, one knight ends the game.
Try it yourself
The smothered mate is one of the prettiest mates there is. Once you've got it, go back to checkmate patterns for the other shapes, or review the fork, since a knight check often forks something too. When you're ready, play a free chess game and see whether you can smother the computer's king with its own pieces.