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Castling-960 to the rescue on b1 (c1·6)

sf-c-0009
Puzzle rating: 1340Theme: Castling 960: the strongest move is to castle — drag the king onto its rook.
a8b7c6d5e4f3g2h1
White to move — find the best continuation

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The tactical motive

Castling 960: the strongest move is to castle — drag the king onto its rook.

White to move — find the best continuation

Solution & explanation

Main line

17. O-O-O Rxb3 18. Qa4 Rb4 19. bxc6

Why it works

  • Great move! king to c1 keeps the pressure (+3.4).
  • Well found: queen to a4 (+3.6).
  • Precise: pawn to c6 is the top choice (+3.5).
  • You reach a winning position (+3.5).
  • If instead Bh6+, then Kb2 and you stay on top.

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