Attack on the uncastled king: pawn to b3 (a2·8)
c9-03512naming tag (square·N)Shuffle Rating 780Theme: Chess960 twist: use the unusual starting setup of the pieces.
White to move — find the best continuation
The tactical motive
Chess960 twist: use the unusual starting setup of the pieces.
White to move — find the best continuation
Solution & explanation
Main line
16. axb3 axb3 17. Kh1 O-O 18. Nc3
Why it works
- Great move! pawn to b3 keeps the pressure (+6.6).
- king to h1 develops smoothly.
- Precise: knight to c3 is the top choice (+6.2).
- You win a piece — the queen.
- If instead axb3, then Kh1 and you win the queen.
About this position
These pieces come from starting position #502.
SP-502 · ThroneGuard — A centre-file king with no knight on the edge; a position and its mirror twin always share this family.
Explore position #502Similar puzzles
Free, no ads · Android 8.0+ · coming soon to Google Play