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Attack on the uncastled king: rook to a5 (a1·5)

c9-07884
Puzzle rating: 1070Theme: 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

17. Rxa5 O-O 18. Rb5 Qd8 19. Bxd5

Why it works

  • Great move! rook to a5 keeps the pressure (+4.0).
  • rook to b5 develops smoothly.
  • Precise: bishop to d5 is the top choice (+4.5).
  • You win a piece — the knight.
  • If instead Nd7, then Rb5 and you win the knight.

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