The Rook Pawn Exception: King Trapped in the Corner
White to play and draw
PlayYou have a rook and a pawn against a rook, and it is a draw. Your king is shut in on a8, in front of its own rook pawn, and his king is close enough to reach c7. The rule: once the defending king stands on c7, your king never gets out.
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King Trapped in Front of the Rook Pawn
White to play and draw · Hold the draw against perfect play
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The theory
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Count your king's moves. your own pawn stands on a7, and his rook on the b-file covers b7 and b8. Until your king gets out, the pawn cannot promote.
Rook pawns break the usual rules. A king imprisoned on a8 in front of its own a7 pawn cannot convert, even with a rook to spare.
Two exits, both covered. The king's only squares are b7 and b8, since a7 is occupied by its own pawn. A defending rook anywhere on the b-file covers them both, and it has nothing else to do.
The one freeing attempt. The white rook can travel to b8 and drive the black rook off the file. It changes nothing: the defending king walks to c7 and takes over the guard, covering b7 and b8 himself, which frees the rook to go wherever it likes.
Negative knowledge. The practical value of this position is knowing not to steer into it. Never let your king get shut in front of your own rook pawn while you are trying to win.
In this drill you hold the stronger side to a draw. Recognize the rook-pawn exception before you overpress.
Keep going
Freeing the King From Its Own Rook Pawn
White to play and win
The Frontal Attack: A Pawn Short of the Mid-Line
White to play and draw
The Far Rook Still Holds
White to play and draw
All 96 rook endgames positionsFollow the full curriculum (free)