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R-305 (Vancura)

  Let us now examine positions with the black king imprisoned in the corner g7. Pay attention to the word imprisoned since the threat a7 with the winning backblow of the rook, the black king must not leave the safety area restricted to squares f7-f6-h6-h7. At first sight one can conclude that Black is helpless […]

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R-364

  As in the example with the b-pawn, White may win even when the black king is cut off only a file away from the pawn, provided that black pieces have not reached their optimum-positions Rc8 and Ke6, i.e. Ke5. The following position has been examined by J. Nunn in 1992. Black to move may […]

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