Isolated pawns are very powerful and win easily provided they can mutually protect each other. However, if their defence is not well organized, surprises are possible. If the white pawn were on f6, it would indirectly protect the d5-pawn thanks to the threat of promotion and at the same time restrict the black king to the squares d6 and d7. However, in the diagrammed position Black has a greater degree of «freedom» which enables him to draw.
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