When his pawn majority has no “close” contact with the enemy pawn pair, Black can hardly ever avoid defeat by a reduction of material. Since the black pawns are much slower than the white outside passed pawn, White’s winning prospects are excellent. Of the crucial importance for the outcome of the game is how far the outside pawn is from the place of the main action. This conclusion is corroborated by two endings of the former World Champion Robert Fischer. The diagrammed position arose in the fifth game of the unforgettable match Fischer – Larsen, Denver 1971. White’s pawn structure h2-g3 is ideal since it does not allow a favourable reduction of material; as a consequence, the outside passed a-pawn will by deflecting the black king enable an easy “harvest” of the black pawns.