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Attack on the uncastled king: queen to c6 (d5)

Shuffle Rating 1870Theme: Chess960 twist: use the unusual starting setup of the pieces.
White to move — find the best continuation

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The tactical motive

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

Uncastled king: the enemy king is stuck in the centre — punish it before it castles.

Winning tactic: there is a move that gains a decisive advantage — find it.

Difficulty 1870 ShuffleRating — for advanced tacticians.

White to move — find the best continuation

Position on the board

White: king c1, queen d5, rook a1 g1, bishop c3 g6, knight f1, pawn b2 f2 h2 e3 c4 d4 g4 b5.

Black: king c8, queen h8, rook b8 g8, bishop d6, knight f8, pawn c5 a6 e7 f7 g7 h7.

15 white and 12 black pieces are on the board; the puzzle position arises after move 13.

Solution & explanation

Main line

13. Qc6+ Bc7 14. Ba5 Ne6 15. Bf5

Why it works

  • Great move! queen to c6 keeps the pressure (#11).
  • bishop to a5 develops smoothly.
  • A natural move: bishop to f5.
  • You win decisive material (+15.0).
  • If instead Bc7, then Ba5 and you stay on top.

Types in this puzzle

Winning blow

Find the strike that wins material by force.

A winning blow is a forced material gain that does not fit a single textbook motif. The general tactical recipe applies: spot loose pieces, an awkwardly placed king, overloaded lines. Go through the forcing moves in order of violence — checks, captures, threats — because most combinations start with one of them. Do not judge by feel: calculate the concrete line until the outcome is beyond doubt.

Counter-strike

Don't defend — answer the threat with a bigger one.

The counter-strike: instead of defending against the threat, you answer with a bigger threat of your own. While your opponent grabs a pawn, you deliver mate — the arithmetic favors you. Look for a counter when direct defenses fail: do you have a check, an attack on the queen, a mating threat? The beginner's error is meeting every threat with a reflexive defense without checking the counterattacking resources first.

Uncastled king

The king lingered in the middle — punish the delay.

Punishing the uncastled king: your opponent delayed castling, and now his king is stuck on its starting square under fire. In Chess960 this is deadlier than in classical chess — the king may start in the center or near the edge, and the familiar defensive setups simply do not apply. The signs: the victim still holds castling rights, and the files toward his king are half-open. Open lines before the king manages to hide.

Provenance

Mined from the project's engine self-play games.

Verified by Stockfish at depth 20+.

Solution forcedness confirmed (verified).

Pack 014

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