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Castling-960 to the rescue on a8 (c8·4)

sf-c-0006
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

19... O-O-O 20. Na8 Rdd1 21. Bd4 Nc4+

Why it works

  • Great move! king to c8 keeps the pressure (+3.4).
  • Well found: rook to d1 (+3.6).
  • Strong! knight to c4 is the sharp choice (+3.7).
  • You reach a winning position (+3.7).
  • If instead Na8, then Rdd1 and you stay on top.

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