If the white pawn majority has not occupied more space, the nuances will decide. A breakthrough will be possible only if the black king is far and the outside passed pawn poses no immediate danger. A brilliant example is the game Moravec – Culka, 1908. White to move wins despite his pawns being momentarily immobilized. However, they are somewhat closer to the promotion square and are being supported by own king. Consequently, they will be quicker than the black passed b-pawn.
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