Of special importance for both the theory of the endgame as well as tournament practice are positions with a rook’s pawn and the wrong-corner bishop against connected pawns by the rim of the board. As we saw in example 531, when the weaker side has only a rook’s pawn, the position is drawn provided its king is in the drawing zone. However, when the weaker side in addition to the rook’s pawn also has a blocked pawn on the adjoining file, these positions are very often lost. The simplest conversion of advantage is with a blocked pawn on the seventh rank, as was demonstrated by J. Walker as early as 1841. Black must defend by bringing the king to the “wrong” corner. But White to move will win by stalemating his opponent. Black will be forced to advance the g-pawn thus enabling the “worthless” rook’s pawn to switch to the adjoining file quickly deciding the game.
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