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Castling-960 to the rescue on a1 (b1)

c9-00519
Puzzle rating: 1100Theme: 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

11. O-O-O Ne7 12. Qxh7 a5 13. exd4

Why it works

  • Great move! king to c1 keeps the pressure (+3.3).
  • Spot on — queen to h7 (+3.2).
  • Precise: pawn to d4 is the top choice (+3.0).
  • You reach a winning position (+3.0).
  • If instead Ne7, then Qf7 and you stay on top.

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