What is checkmate in chess?

The king is attacked, and there is no legal move that stops it being attacked. That is the whole definition. Three things have to be true at once: the king is in check, it cannot move to a safe square, and nothing can block the attacker or capture it. When all three hold, the game is over immediately - there is no last move, and the king is never actually taken.

What is the difference between check and checkmate?

Check is an attack on the king that can still be answered; checkmate is the same attack with no answer left. In check you must deal with it and you always have at least one way to. Checkmate is not a stronger kind of check - it is a check that arrived at a moment when all three replies happen to be unavailable.

Do you have to say checkmate?

No. Nothing needs to be announced for the game to be over - the position decides it, not the players. Saying "check" is a courtesy in casual games and is not required in tournaments either, where a player is simply expected to notice.

Is the king ever captured in chess?

Never. It is the only piece that cannot be taken, and that is deliberate: the game stops one move before, at the moment escape becomes impossible. It is also why you may not make a move that leaves your own king in check - the position that would allow a capture is not permitted to arise.

What is a back-rank mate?

A rook or queen arriving on the enemy king's own back rank, with the king trapped there by the three pawns that never moved in front of it. It is the most common checkmate in real games at every level, and the reason strong players spend a quiet move pushing one of those pawns - a move called making luft, giving the king air.

Can you checkmate with only a king and one piece?

With a queen or a rook, yes - king and queen or king and rook force mate against a lone king. King and knight or king and bishop cannot: there are not enough attacked squares to close every escape, so those endings are drawn. King with two bishops, or bishop and knight, can mate, though the last one is genuinely hard.

Checkmate

Checkmate is the one thing in chess that ends the game, and it ends it without the king ever leaving the board. Three conditions have to hold at the same moment - so the fastest way to learn them is to go and make them hold.

By Nethanel Bar, Co-founder & CEO

Last updated August 27, 2026

Checkmate ends a game of chess on the spot, and it does it without the king ever being captured. That is worth getting straight before anything else: the game does not finish when the king is taken, it finishes at the moment the king is attacked and nothing at all can be done about it.

Three things have to be true in the same instant:

the king is in check - some enemy piece is attacking the square it is on;
it cannot move to a square where it would be safe;
nothing can block the attack or capture the attacker.

Here is the version of that you will meet most often in real games. White to move.

Interactive board

White to move. There is a mate in one on this board, and Black's own pawns are what makes it work.

That is the back-rank mate, and it is the most common checkmate there is at every level of play. Nothing exotic happened: the pawns in front of the black king never moved, and one rook was enough.

Check is not checkmate

Every check has exactly three possible answers, and there has never been a fourth.

Black is in check from the rook on e1, and there are three replies: move the king off the line (green), put something in the way (blue), or capture the checker (red). Checkmate is simply the position where none of the three is available.

Move the king to a square that is not attacked. Block the line between the attacker and the king with any piece you own. Capture the piece giving check.

A knight's check can never be blocked - it jumps, so there is no line to stand on - which leaves only two answers and is why knight checks are so awkward.

Checkmate, then, is not a special sort of check. It is an ordinary check that happens to arrive when all three answers are missing at once.

The move that mates, and the two that draw

Twenty-seven queen moves are available in the position below. One of them is checkmate. Two of them are stalemate - the black king is not in check but has no legal move at all, and the game is an instant draw from a completely winning position.

Interactive board

White to move, and the queen has the run of the board. Tap the one square she gives checkmate from.

Those two stalemate squares are the reason stalemate is worth a page of its own. The difference between winning and drawing here is one square, and it catches beginners and grandmasters alike.

The patterns worth knowing by name

Most real checkmates are one of a handful of shapes. Here is the prettiest one, and the reason it works is entirely Black's own fault.

Interactive board

The black king has three neighbours - and all three are Black's own men. White to move: mate in one.

pattern	how it works
back rank	rook or queen on the enemy back rank; the king is walled in by its own unmoved pawns
smothered	a knight checks a king whose every escape square is filled by its own pieces
ladder	two rooks take one rank each and walk the king to the edge, handing the mate over between them
queen and king	the queen takes every square next to the king, and your own king guards her
Scholar's Mate	queen and bishop both hit f7, the one square the black king defends alone

Notice what every one of them has in common: the mating piece is defended, or it is out of reach. An undefended queen delivering check beside the enemy king is not checkmate, it is a gift.

Try it

Two rooks against a bare king, White to move. Mate in one - there are two moves that do it, and at least one that throws the whole win away.

Common questions

What is checkmate in chess?: The king is attacked, and there is no legal move that stops it being attacked. That is the whole definition. Three things have to be true at once: the king is in check, it cannot move to a safe square, and nothing can block the attacker or capture it. When all three hold, the game is over immediately - there is no last move, and the king is never actually taken.
What is the difference between check and checkmate?: Check is an attack on the king that can still be answered; checkmate is the same attack with no answer left. In check you must deal with it and you always have at least one way to. Checkmate is not a stronger kind of check - it is a check that arrived at a moment when all three replies happen to be unavailable.
Do you have to say checkmate?: No. Nothing needs to be announced for the game to be over - the position decides it, not the players. Saying "check" is a courtesy in casual games and is not required in tournaments either, where a player is simply expected to notice.
Is the king ever captured in chess?: Never. It is the only piece that cannot be taken, and that is deliberate: the game stops one move before, at the moment escape becomes impossible. It is also why you may not make a move that leaves your own king in check - the position that would allow a capture is not permitted to arise.
What is a back-rank mate?: A rook or queen arriving on the enemy king's own back rank, with the king trapped there by the three pawns that never moved in front of it. It is the most common checkmate in real games at every level, and the reason strong players spend a quiet move pushing one of those pawns - a move called making luft, giving the king air.
Can you checkmate with only a king and one piece?: With a queen or a rook, yes - king and queen or king and rook force mate against a lone king. King and knight or king and bishop cannot: there are not enough attacked squares to close every escape, so those endings are drawn. King with two bishops, or bishop and knight, can mate, though the last one is genuinely hard.