Backward pawn
A pawn left behind its neighbours that can't safely advance and is stuck defending a hole.
A backward pawn has been left behind by the pawns beside it, so it can no longer be protected by a pawn and can't advance without being captured. The square in front of it becomes an outpost the opponent can occupy.
It's a target: the enemy piles pieces on it (especially with a rook on the half-open file in front) and ties your forces to its defence.
Creating a backward pawn in the enemy camp — and avoiding one in your own — is one of the most common strategic battles in the middlegame.
Advancing a pawn so its neighbour can never catch up, permanently weakening the square in front of it for a fleeting gain of space.
Related terms
See Backward pawn in your own games
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