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Attack on the uncastled king: pawn to b5 (b4·5)

c9-25910
Puzzle rating: 1250Theme: Chess960 twist: use the unusual starting setup of the pieces.
a8b7c6d5e4f3g2h1
White to move — find the best continuation

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The tactical motive

Chess960 twist: use the unusual starting setup of the pieces.

White to move — find the best continuation

Solution & explanation

Main line

7. b5 Qa3 8. Bb4+ Qxb4 9. Qxb4+

Why it works

  • Great move! pawn to b5 keeps the pressure (+6.2).
  • Spot on — bishop to b4 (+5.9).
  • Strong! queen to b4 is the sharp choice (+6.0).
  • You win a piece — the queen.
  • If instead Qa3, then Bb4+ and you stay on top.

About this position

These pieces come from starting position #217.

Explore position #217

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