Checkmates
How to Checkmate with King and Rook
King and rook against king is the basic checkmate that actually decides games. Rook endings are the most common endgames in chess, and many of them end with one side trading down into a lone rook. Unlike the queen mate, the rook cannot do much on its own: it controls one rank and one file, and it cannot stop a king from walking up to it diagonally. You win by combining three ideas: cutting the king off, taking the opposition with your own king, and spending a tempo with a waiting move when you need to.
The target: the edge mate
Start with the picture you are aiming for. The defending king stands on the edge of the board. Your king stands directly opposite it, two squares away, which covers the three squares in front of the defender. Your rook then checks along the edge, and there is nowhere to go.
Every other step in this ending exists only to reach that position. With perfect play the mate never takes more than sixteen moves, and a solid method usually needs about twenty to twenty-five, well inside the 50-move limit.
Step 1: Cut the king off
Use the rook to draw a line the enemy king cannot cross. A rook on a file confines the king to one side of it; a rook on a rank does the same vertically. Keep the rook far away from the enemy king so it cannot be attacked, which is the rook's main weakness in this ending. If the king does come after the rook, slide the rook to the far end of the same line rather than giving up the cut.
Step 2: Bring your king and take the opposition
The rook cannot push the king back alone. Your king must come up and stand directly opposite the enemy king, with one square between them. This is called the opposition. When the kings face each other like this, the defending king cannot step forward, so a rook check along its line forces it one row back toward the edge.
A practical rhythm looks like this. Approach with the king. If the kings end up in opposition, give a rook check and the box shrinks by one row. If the defender avoids the opposition by stepping sideways, follow it with your king, or make the box smaller with the rook if that is possible without letting the king out. The defender can dodge for a few moves, but it is running out of room every time.
Step 3: Push the king to the edge
Repeat the cycle until the king is on the last rank or file. Here is how the finish looks once the rook already guards the seventh rank and the black king is stuck on the back rank.
From the position with White Ke1 and Ra7 against Black Kg8, White plays 1.Kf2 Kf8 2.Kf3 Ke8 3.Kf4 Kd8 4.Kf5 Kc8. The black king heads toward the rook, so White switches it to the far side with 5.Rh7, still guarding the seventh rank. Then 5...Kb8 6.Ke6 Ka8 7.Kd6 Kb8 8.Kc6 Ka8 9.Kb6 Kb8 10.Rh8# finishes it. The black king had only the back rank, and the white king walked right up to it.
Play through the edge phase of the rook mate →Step 4: The waiting move
Sometimes your king is one file away from the opposition and the defender is to move in a way that keeps it from you. You do not want to change the rook's line and you do not want to move your king. The answer is a waiting move: a quiet rook move along the same line that hands the move back to your opponent.
In the diagram, the white king on e6 already covers d7, e7 and f7, so the black king is stuck on the back rank. It is not in opposition, though, so an immediate check on h8 just lets the king slip to c7. Instead White plays 1.Rc1!, taking away c7 and c8. Black's only move is 1...Ke8, walking straight into the opposition, and 2.Rc8# ends the game.
The same idea appears in many forms. With White Kd6 and Ra7 against Black Ke8, the rook move 1.Rb7! keeps the seventh rank guarded and passes the move. If Black plays 1...Kd8, then 2.Rb8# follows at once; if 1...Kf8, White follows with 2.Ke6 Kg8 3.Kf6 Kh8 4.Kg6 Kg8 5.Rb8#.
See the waiting move 1.Rb7 in action →The stalemate trap
Stalemate is rarer here than with the queen, but it happens near the corner. In the main line above, after 8.Kc6 Ka8, the tempting 9.Rb7?? looks like it locks the king in. It does: Black has no legal move and is not in check, so the game is drawn on the spot. The correct 9.Kb6 leaves the king the b8 square and mates next move. Whenever your rook goes next to the defending king, check that the king still has a legal move or that the rook is actually giving check.
Common mistakes
- Leaving the rook close to the enemy king. The defender will attack it, and you will waste moves running away. Keep the rook on the far side of its line.
- Checking without the opposition. A rook check only drives the king back when your king covers the squares in front of it.
- Giving up the cut. If the rook moves off its line to escape an attack, the king can slip out and you start over.
- Forgetting the waiting move. When you are one tempo short, a quiet rook move along the same line is almost always the answer.
How to practise this
Set up a lone black king in the center and a white king and rook in a corner on the analysis board, then play it out against the computer on the play page. Try it from a few different starting squares. Your goal is to mate in under thirty moves without ever losing the rook or stalemating. Once you can, do it with a clock. If the ideas of opposition and tempo felt new, the article on king and pawn endgames uses exactly the same concepts, and the king and queen checkmate is a good warm-up if you are still building confidence.
- Cut the king off with the rook and keep the rook far away.
- Bring your king to face the enemy king, then check.
- When one tempo short, make a waiting move along the same line.
- Near the corner, make sure the defender still has a move unless you are giving mate.