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Attack on the uncastled king: rook to a3 (b3)

c9-04873
Puzzle rating: 1052Theme: 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

8. Rxa3 axb4 9. Rb3 e6 10. Nf4

Why it works

  • Great move! rook to a3 keeps the pressure (+3.8).
  • rook to b3 develops smoothly.
  • Precise: knight to f4 is the top choice (+3.6).
  • You reach a winning position (+3.6).
  • If instead axb4, then Rb3 and you stay on top.

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