When passed pawns are separated they can be stopped by the enemy king only if their common square has not yet reached the eighth rank. If each side has passed pawns whose common square includes the eighth rank, the side with faster pawns will win. This position, with colours reversed, arose in the game […]

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  Let us now consider a position with pawns three files apart. The common square does not include the eighth rank so it is obvious that the pawns cannot reach the promotion square on their own. Nevertheless, it is important to know that they are invulnerable to the attack of the black king.   The […]

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