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Attack on the uncastled king: rook to a3 (a1·3)

c9-05213
Puzzle rating: 1064Theme: 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 Bxa3+ 9. Kb1 bxc2+ 10. Kxc2

Why it works

  • Great move! rook to a3 keeps the pressure (+5.1).
  • king to b1 develops smoothly.
  • Strong! king to c2 is the sharp choice (+5.1).
  • You win a piece — the queen.
  • If instead Bxa3+, then Kb1 and you win the queen.

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