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Castling-960 to the rescue on a1 (c1·7)

c9-19185
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

20. O-O-O Bc5 21. Be4 Na1 22. Kb1

Why it works

  • Great move! king to c1 keeps the pressure (+1.9).
  • bishop to e4 develops smoothly.
  • Precise: king to b1 is the top choice (+2.2).
  • You reach a winning position (+2.2).
  • If instead Bc5, then Be4 and you stay on top.

About this position

These pieces come from starting position #671.

Explore position #671

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