When the goal cannot be achieved by active play and the advance of own pawn, salvation is possible only by the tough struggle for the critical squares in front of the pawn. This is nicely illustrated in a study by I. Moravec ( 1952 ) . The black pawn is nearer to the promotion square, whilst the white king stands in the way of its own pawn. Therefore, the draw is not to be achieved by the reckless pawn race but rather by controlling the critical squares in front of the pawn.
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