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Attack on the uncastled king: pawn to a8 (a7)

c9-22789
Puzzle rating: 1630Theme: 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

19. a8=Q+ Qd8 20. Qe4+ Qe7 21. Qaa8#

Why it works

  • Great move! pawn to a8 keeps the pressure (#2).
  • Well found: queen to e4 (#1).
  • Precise: queen to a8 is the top choice (#).
  • The line ends in a forced mate in 3.
  • If instead Qd8, then Qe4+ and you win the pawn.

About this position

These pieces come from starting position #881.

Explore position #881

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