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Attack on the uncastled king: pawn to a6 (b5·3)

c9-03465
Puzzle rating: 1058Theme: Chess960 twist: use the unusual starting setup of the pieces.
a8b7c6d5e4f3g2h1
White to move — find the best continuation

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The tactical motive

Chess960 twist: use the unusual starting setup of the pieces.

White to move — find the best continuation

Solution & explanation

Main line

10. bxa6 O-O 11. Bf3 Bxf3 12. Nxf3

Why it works

  • Great move! pawn to a6 keeps the pressure (+7.0).
  • Spot on — bishop to f3 (+6.6).
  • Precise: knight to f3 is the top choice (+6.7).
  • You win a piece — the queen.
  • If instead O-O, then fxe6 and you win the queen.

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