How to Checkmate with a King and Rook
· Endgames
To checkmate with a king and a rook, use the rook to shut the enemy king into a smaller and smaller area, march your own king up to face it, and finish with a rook check along the edge of the board. It is always winning, and with best play it takes at most 16 moves. The only ways to spoil it are to lose the rook or to stalemate the opponent.
The method is the same every time. Learn the three jobs below and you can win this ending from any starting position, as in any endgame where you have a clear plan. You can also practise the king and rook checkmate against Stockfish as you read.
The final pattern
Start with the end, because everything else aims at it. The defending king stands on the edge of the board. Your king stands two squares in front of it, on the same file, so that the squares in front of the enemy king are covered. Your rook then gives check along the edge and the enemy king has nowhere to go.
White to move plays Ra8, which is checkmate. The white king covers d7, e7 and f7, and the rook covers the whole eighth rank.
The kings face each other with one empty square between them. This is called the opposition. The player who has to move gives way, which is why your aim is to reach this position with the defender to move, or to use a rook move to pass the turn back.
Job 1: cut the king off with the rook
Put the rook on a file or rank next to the enemy king, far enough away that the king cannot attack it. The king may not cross that line, so half the board is no longer his.
The rook on d1 cuts the black king off from the d-file and everything to its left. Black can only go to e6, f6, f5, f4 or e4.
Keep the rook at a distance. A rook next to the enemy king, and not defended by your own king, is simply captured.
Careless: the rook on d4 stands next to the black king and nothing defends it, so Black plays Kxd4 and the game is a draw.
A good habit: before every rook move, ask whether the enemy king can reach the square next to the rook and whether your king guards it.
Job 2: bring your king up
The rook alone cannot mate. Walk your king towards the enemy king while the rook holds the cut-off. Each time the defender steps toward the edge, move the rook to the next line to take away the room he just used, and again keep it a safe distance away. Slowly the area shrinks, a method often called the box: the rook and the edge of the board are the walls and the box gets smaller with each move.
- Move your king first when the enemy king cannot reach your rook.
- Move the rook to shrink the box when the king steps back from it.
- Never allow the enemy king to slip round behind the rook.
Job 3: take the opposition and give check
When the defender is on the edge and your king stands two squares from him on the same file, the defender has little choice. Often you need to make him move first. In the position below, Black is on d8 and a check does not mate yet, so White takes a file away with the rook.
White plays Rc1. The rook takes the c-file away, so the black king has only one move: Ke8.
After Rc1 Black's only legal move is Ke8, and then Rc8 is checkmate, the same pattern as in the first diagram. Count the squares: with the rook on the c-file and the white king on e6, d7, e7 and c8 are all taken, leaving only e8.
The waiting move
Sometimes everything is ready except that it is your move. Your king is in place and the rook holds the line, but a check now only lets the king run. The answer is a waiting move: slide the rook along the line it already holds, far from the enemy king. Nothing changes on the board except that the defender now has to move.
White to move. Ra8+ is too soon, because Black escapes with Kg7. Instead White waits with Rb7, and the rook still holds the seventh rank.
After Rb7 Black has two moves, and both lose. If he plays Ke8, the kings stand opposite each other and Rb8 is checkmate. If he plays Kg8, follow him: Kf6 Kh8 Kg6 Kg8, and now the kings are opposite again, so Rb8 is checkmate.
Any safe square on the seventh rank does the job, so pick one far from the enemy king. Do not move the rook off that rank, or the king walks out of the box.
The last positions before checkmate
These are the positions to steer for. In each one it is White to move, and the next move is checkmate. Once you can see them coming, the last few moves play themselves.
On the edge: the kings are opposite each other. Ra8 is checkmate.
In the corner, kings opposite: Ra8 is checkmate. The white king covers g7 and h7, and the rook covers g8.
In the corner, a knight's move apart: Rh1 is checkmate. The white king covers g8 and g7, and the rook covers h7.
The big danger: stalemate
The most common mistake is to leave the lone king with no move when he is not in check. That is stalemate, and the game is drawn instead of won.
Black to move has no legal move and is not in check: stalemate. White should have played a check instead.
Before you play a rook move, look at the squares the enemy king still has. If he has none, make sure your move is a check, and if it is not a check, leave him at least one square.
A checklist for every move
- Is my rook safe? Can the enemy king reach it without my king protecting it?
- Is the enemy king still cut off on the far side of the rook?
- Has the box got smaller, or can I bring my king closer instead?
- If I give check, is it mate? If not, does he still have a legal move?
Try it yourself in the king and rook endgame, where you start from a bare position and have to deliver the mate against Stockfish, and sharpen your eye for mates with the puzzles. If you want to know how all the pieces should come out before an ending is ever reached, read how to develop your pieces.
Once you can mate with a rook confidently in under 20 moves, you are ready for harder endings. This one is the foundation: every other basic mate uses the same ideas of cutting off, bringing the king and taking the opposition.