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Attack on the uncastled king: pawn to b4 (a3·10)

c9-06047
Puzzle rating: 1056Theme: 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

7. axb4 f4 8. b5 Bd6 9. f3

Why it works

  • Great move! pawn to b4 keeps the pressure (+6.4).
  • pawn to b5 develops smoothly.
  • Precise: pawn to f3 is the top choice (+6.1).
  • You win a piece — the queen.
  • If instead f4, then O-O-O and you win the queen.

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