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Attack on the uncastled king: pawn to b4 (a3·20)

c9-08746
Puzzle rating: 1062Theme: 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

9. axb4 Bxb4 10. Be3 O-O-O 11. O-O-O

Why it works

  • Great move! pawn to b4 keeps the pressure (+3.4).
  • Spot on — bishop to e3 (+3.1).
  • A natural move: king to c1.
  • You reach a winning position (+3.2).
  • If instead Bxb4, then Nf3 and you stay on top.

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