Rook vs Rook-Pawn: Holding the Draw

Black to play and draw

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The same position with Black to move changes everything. The spare tempo is not for the pawn, it is for the king: reach the fifth rank before the rook can cut you off.

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Rook vs Rook-Pawn: The Defender's Tempo

Black to play and draw · Hold the draw against perfect play

Waking the engine…

The theory

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Being a whole rook up is usually decisive, yet a passed pawn with its king alongside is the great exception, and whose move it is often settles the result.

The tempo belongs to the king. Kb5 and Kc5 both draw. Advancing with a4 loses at once: the rook cuts on the fifth rank and the pawn is abandoned.

Stay level with the pawn. Once the king stands beside its pawn, the horizontal cut is impossible. Checks on the fifth rank only shepherd king and pawn down the board together.

The corner is the safety net. With an a-pawn the defending king reaches a1 in front of its own pawn on a2, where capturing is answered by Kxa2 and covering the b-file is stalemate. That is what makes the rook-pawn so stubborn.

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