Attack on the uncastled king: queen to c6 (d5)
sf-u-0083naming tag (square·N)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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