P-67

 

In an analogous position with a blockaded black pawn on the seventh rank, a win is possible only if the passed pawn is still on its initial square and the black pawn can be attacked from the other side. This was demonstrated by C. Salvioli way back in 1887. Due to the flexibility of the position and the possibility of advancing the d-pawn one or two squares, White can execute the victorious attack on the f-pawn from the other side

 

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