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Castling-960 to the rescue on a8 (c8·2)

c9-12659
Puzzle rating: 1340Theme: Castling 960: the strongest move is to castle — drag the king onto its rook.
h1g2f3e4d5c6b7a8
Black 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.

Black to move — find the best continuation

Solution & explanation

Main line

21... O-O-O 22. Nxa3 Bxd2+ 23. Kb1 Bc3

Why it works

  • Great move! king to c8 keeps the pressure (+2.6).
  • Spot on — bishop to d2 (+2.8).
  • A natural move: bishop to c3.
  • You reach a winning position (+2.9).
  • If instead Nxa3, then Bxd2+ and you stay on top.

About this position

These pieces come from starting position #537.

Explore position #537

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