Q-423

  A similar position with a backward pawn and a white “sole pawn” on the g-file is also drawn when the black king defends his pawn from behind. However, White wins when he can “exclude” an opponent’s king from the defense of a g-pawn. Such position occurred, with colors reversed, in the game Geller-Flor, Moscow...


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Q-422

  Black easily holds the position even when his pawns are one file distant from the edge, provided that the backward pawn and a white pawn are on the f-file, and the rook occupies the ideal position on f4. The position assessment does not change even when the queen controls the square behind the pawn...


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