To solve a mate-in-one puzzle, find the one move that gives check and leaves the enemy king nothing to do about it. Three questions test any candidate move: can the king step to a safe square, can the checking piece be captured, and can the check be blocked? If the answer to all three is no, it is checkmate.
This page teaches that method, then shows the checkmate patterns that appear most often in beginner puzzles, with worked positions you can try before reading the answer. It is a narrower companion to the chess tactics guide for beginners, which covers the other tactics too.
What does mate in one mean?
"Mate in one" means the side to move can checkmate the opponent with their very next move. In a puzzle you are told whose turn it is, and the job is to find that single move.
Checkmate needs three things, all at once:
- The king is in check, attacked by an enemy piece.
- The king has no safe square to move to.
- The check cannot be answered by capturing the checking piece or putting something in its way.
If any one of those is missing, it is only a check. That is why a move that looks like mate sometimes is not, and why the puzzle is worth doing slowly.
How do you search for a mate in one?
Work through the same steps each time. It feels slow for the first few puzzles and then becomes quick.
1. List your checks
Make a list of every move that gives check: every piece that can attack the king this move, from every square it can reach. Checks are a small group. Most positions have only a few, and the mating move is always among them.
2. Check the king's escape squares
For each check, look at the squares around the enemy king. A square is closed if it is covered by one of your pieces, blocked by one of the king's own pieces, or off the board. Remember that the checking piece itself may cover some squares. A rook on the same row as the king, for instance, covers the whole row.
3. Ask whether the checking piece can be captured
Look at every enemy piece, including the king. The king can capture the checker too, unless your piece is protected by another piece of yours. A protected checking piece cannot be taken by the king.
4. Ask whether the check can be blocked
If your checking piece is a rook, bishop or queen, there are squares between it and the king, and an enemy piece may be able to move onto one of them. A knight check and a pawn check cannot be blocked, because they do not travel along a line.
If all three answers close the door, that is the mate. If you find a check that fails the test, cross it off and try the next one. It is normal for a puzzle to have several tempting checks and only one real mate.
What does a back-rank mate look like?
A back-rank mate is a rook or queen check along the first or last row against a king whose own pawns block its escape.
White to move
Black: king g8, knight c3, pawn f7, pawn g7, pawn h7.
White plays Ra8#. The rook slides up to a8 and checks the king along the top row. Black's own pawns on f7, g7 and h7 block every square the king could step to, nothing can capture the rook, and the black knight on c3 cannot reach the top row to block. It is called a back-rank mate, and it is one of the most common mates among beginners because players push the pawns in front of their king and forget it then has nowhere to go.
When you look at your own king, check whether it has a flight square. Moving one of the pawns in front of it, so the king has somewhere to step, takes the back-rank mate away.
What do queen-and-king mates look like?
A queen is the strongest attacker, but a lone queen is easy for the king to capture. The usual pattern is a queen that checks while a second piece, often your own king, stands guard so the king cannot simply take her.
White to move
Black: king h8.
White plays Qb8#. The queen checks the king along the top row and also covers g8, and the white king on g6 guards g7 and h7, so the black king has no square. Notice the near miss: Qh1+ is also check, but the king just steps to g8. A queen check is a mate only after you have counted the escape squares.
A second example is a mate by Black, with the queen next to the king, supported from a distance.
Black to move
Black: king g8, queen g5, bishop b7, pawn f7, pawn g7, pawn h7.
This time it is Black's turn. The queen takes the pawn on g2 with check. The white king cannot take her, because Black's bishop on b7 protects g2 along the whole long diagonal. The queen also covers g1, and h2 is blocked by White's own pawn. The rook on f1 cannot help, since rooks move in straight lines and g2 is diagonal from f1. A queen backed by a bishop on a long diagonal is a pattern worth remembering.
How do rooks deliver mate?
Rooks mate on edges, because a rook covers a whole row or column and the edge limits where the king can run. Two patterns come up repeatedly:
- The back-rank mate, shown above, is a rook mate.
- The king-and-rook mate on the edge. Put the enemy king on h8 and your own king on f7. The black king cannot step to g8 or g7, because your king covers both. A rook that reaches the h-file, from a1 to h1, checks the king and covers the whole file, so h7 is closed too. That is mate.
When two rooks work together, they can mate by taking turns on neighbouring rows, each one cutting off a row so the king is pushed to the edge. This is the ladder mate, and it gives the challenge puzzle in our free set, where White needs two moves.
What are bishop-and-queen mate ideas?
A bishop on a long diagonal makes a queen on the same line very hard to capture, because the king cannot take a protected piece. Picture a white bishop on b2 aiming at the corner. If a queen lands on g7 with the bishop behind her, a black king on h8 cannot take her. The queen covers g8 and h7, so it is mate.
The famous beginner example is Scholar's mate. After 1.e4 e5 2.Bc4 Nc6 3.Qh5, if Black plays 3...Nf6?, then 4.Qxf7# is mate: the queen takes the pawn on f7, the bishop on c4 protects her, and the king has nowhere to go. It is a good pattern to know mostly so you can avoid being on the receiving end, because the weak square next to the king is f7 for Black and f2 for White.
How do knights deliver mate?
A knight's check cannot be blocked, which makes it well suited to finishing a king that is hemmed in by its own pieces. The classic pattern is the smothered mate: the king sits in a corner, boxed in by its own rook and pawns, and a knight gives the final check.
With a black king on h8, a rook on g8, and pawns on g7 and h7, a white knight landing on f7 gives check. The king cannot move because its own pieces fill every adjacent square, nothing can block a knight, and the knight is not capturable by the king or the rook. It is mate. Knights also deliver mate in the open, but the smothered version is the one that appears most often in puzzles.
What mistakes do beginners make with mate in one?
- Stopping at the first check. A check that is not mate can lose the game if the king simply steps away. Count the escape squares before you commit.
- Forgetting the king can capture. If the checking piece is next to the king and unprotected, the king takes it.
- Missing a block. A bishop, rook or queen check can often be interposed. Look at every enemy piece, not only the king's neighbours.
- Reading the wrong side to move. The puzzle says whose turn it is. A mate for White is not a mate for Black.
- Looking only at the king's own row. Check diagonals and columns, because the mating piece does not have to be close to the king.
- Forgetting about pins. A piece that looks as if it can block or capture may be pinned and unable to move. That can turn a failed check into a mate.
How can you practise mate in one?
Practise the method before the patterns. Start with a puzzle, say whose turn it is, list your checks, and test each one with the three questions. Only then check the answer.
A few habits help:
- Start with a set of mates only. If you know every puzzle in a set is mate in one, you are training the search itself.
- Move on to puzzles with mixed goals. Then you also have to decide whether there is a mate at all, or something else, such as a fork or a free piece.
- Set up the position on a real board while diagrams are new, so you can try a candidate check and see where the king can go.
- Go back to the ones you missed after a few days.
- Play some games. The point of the puzzles is to notice a mate when one appears in your own game and nobody tells you it is there.
For free practice, the ten chess puzzles for kids, with answers include three mate-in-one puzzles among forks, pins and free pieces. They are labelled with whose move it is and each answer is explained, so they work for adult beginners too.
For a larger supply, 1000+ Chess Puzzles for Beginners includes 253 one-move puzzles, 144 of them mate in one, taken from real games. Children who know how the pieces move can use Chess Tactics for Kids, which opens with one-move puzzles, 72 of them mate in one, on large diagrams. If a child is the one learning, chess puzzles for kids explains what to start with at different ages.
Questions beginners ask about mate in one
What is the difference between check and checkmate?
Check means the king is attacked. Checkmate means the king is attacked and cannot escape by moving, capturing the attacker or blocking. A check can be answered; checkmate cannot.
Is there always a mate in one in a mate-in-one puzzle?
Yes, that is how the puzzle is defined. Usually only one move works, and other checks are traps designed to look right. If you find a check that fails the three questions, it is not the one.
Which pieces can checkmate?
Any piece except the king can give the checking move. Queens and rooks do it most often, but a bishop, a knight or even a pawn can deliver mate, usually with another piece covering the escape squares.
Why do I keep missing mates that are obvious afterwards?
Usually because you stopped at the first check, or looked only at the squares around the king. Listing every check and testing each one removes the guesswork, and it gets faster with practice.
What should I learn after mate in one?
Mate in two, and the other tactics that win material on the way: forks, pins and skewers. The page on forks, pins and skewers for beginners covers them in detail.
