Put the rook behind the passed pawn

Your rook belongs behind a passed pawn, because from behind it guards every square the pawn steps on and keeps all its own freedom.

This single rule wins rook endings that look level. It works for your own passed pawn and for your opponent's pawn as well.

Move the pieces yourself. Nothing here is scored.

What is a passed pawn?

A passed pawn has no enemy pawn in front of it on its own file. It also has no enemy pawn on either file next to it.

Nothing can stop it except a piece. In an endgame that makes it the most valuable thing on the board.

Both sides then have the same question. Where does the rook go?

Why is the rook better behind the pawn?

Put your rook behind your passed pawn and three good things happen at once.

1. The pawn is guarded on every square it lands on. The rook never has to move again to keep protecting it.
2. The enemy rook has to stop the pawn from in front. That rook is stuck on one file and does nothing else.
3. Your rook keeps its freedom. As the pawn goes up the board, the rook has more squares behind it, not fewer.

In the first diagram White plays 1.a6 and the black rook on a7 is tied to one square. It cannot leave the a-file, so Black is really playing with one piece less.

White's rook on a1 is behind the passed pawn. Black's rook on a7 is stuck in front of it.

What happens when your rook is in front?

Swap the rooks over and the same pawns are worth nothing.

Now the white rook stands on a8, in front of its own pawn. It cannot move, because the pawn behind it would fall. The pawn can only reach a7, and there it is blocked by its own rook.

Meanwhile the black rook behind the pawn is free to do whatever it likes. An extra pawn that neither piece can use is not an advantage.

The same pawns, the rooks swapped. White's rook is stuck on a8 and Black is level.

Put your rook behind the enemy's passed pawn too

The rule works from both sides, and this is the half most learners forget.

If your opponent has a passed pawn, get your rook behind it rather than in front of it. From behind, your rook attacks the pawn and follows it forwards.

The opponent then has to keep a piece guarding the pawn from in front, and that piece stops being useful.

The same idea with the roles swapped. White's rook on a8 is behind Black's passed pawn, and the black rook on a1 is stuck in front of it.

The mistake we see most often

Learners chase the enemy pawn with the rook from in front, because blocking feels safer than attacking.

It costs the game slowly. The rook sits on one square for twenty moves while the other side improves the king and wins somewhere else.

The habit to build is small. Whenever a passed pawn appears, ask one question before you move anything. Which end of that pawn is my rook on?

Try it

Puzzle 1 of 1

These positions with the same idea. Play the move you think is best.

White to play.

Solve more puzzles against the clock in the Grand Prix

Common questions

What is Tarrasch's rule about rooks?

It says a rook belongs behind a passed pawn, whether the pawn is yours or your opponent's. From behind, the rook supports every step the pawn takes.

What if my rook is in front of the passed pawn?

Then the rook and the pawn block each other. The rook cannot move without losing the pawn, and the pawn cannot move because the rook is in the way. Look for a way to get the rook behind it instead, even if that costs a move or two.

Should I put my rook behind my opponent's passed pawn?

Yes. From behind you attack the pawn and you follow it if it moves. Your opponent then has to leave a piece in front of it, doing nothing else.

Does the rule always apply?

It is a strong guide, not a law. If you can see a forced line that wins or draws, play that line. Use the rule when there is nothing forced to calculate.