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Winning blow: queen to d7 (e8)

Shuffle Rating 1010Theme: 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.

A fork made possible by the Chess960 piece placement.

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

Difficulty 1010 ShuffleRating — club-player level.

White to move — find the best continuation

How to recognize this tactic

In Chess960 the pieces start on unfamiliar squares, so tactics appear earlier and from unusual angles. Do not trust classical patterns — read the actual lines of the bishops, the rooks and the queen from where they really stand in this position.

A set-up fork needs one preparing move before the fork lands — a check that drives the king onto the forking square, or a capture that lines the targets up. Find the preparation first, then the fork it makes possible.

This position hides a concrete tactic that wins material or mates. Start with the most forcing candidate moves — checks, captures and threats — and calculate each to a clear end before choosing; the winning line is usually the one the opponent cannot meet.

General method: before you move, list the forcing candidates — every check, every capture, every direct threat — and calculate those first. The solution to a tactic is almost always among them.

Position on the board

White: king d1, queen e8, rook e1 d5, bishop f1, knight b2, pawn a2 c2 d2 h2 f3.

Black: king c7, queen f6, rook b4 b8, knight f7, pawn g4 g6 b7 h7.

11 white and 9 black pieces are on the board; the puzzle position arises after move 23.

The position in numbers

White are ahead by 4 points of material (30 against 26; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.

The white king stands on d1, the black king on c7.

It is White to move on move 23, with 57 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 5 pawns, Black 4. Files fully open (no pawns of either colour): e — natural highways for the rooks and queen. Half-open for White: b, g.

The White king has 2 empty squares to step to right now — the fewer they are, the closer a mating net.

Solution & explanation

Main line

23. Qd7+ Kb6 24. Re6+ Qxe6 25. Qxe6+

Why it works

  • Best move. queen to d7 is exactly what the engine plays (#4).
  • Spot on — rook to e6 (#3).
  • Strong! queen to e6 is the sharp choice (#2).
  • You win a piece — the queen.
  • If instead Kb6, then Re6+ and you stay on top.

Move by move

  • 23. Qd7+ — queen to d7 with check

Types in this puzzle

Setup fork

The random setup allows a fork that classical chess never sees.

A setup fork is a double attack that exists only because of the unusual starting squares — in classical chess these targets never stand side by side. Look for pairs of undefended pieces on your opponent's back rank and for squares from which a knight or pawn hits both at once. Such forks usually appear within the first moves, before the pieces disperse. In every new position, note right away which starting pieces are defended by no one.

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.

About this position

These pieces come from starting position #362.

SP-362 · BastionScout — The king starts one file off-centre, on c or f, and a knight begins in a corner.

The king starts on c1, the rooks on b1 and d1, the queen on g1.

The king already stands on c1, so castling long moves only the rook, from b1 to d1.

The bishops stand on e1 and f1; their long diagonals reach a5 and a6 once the d- and e-pawns step aside.

One second-rank pawn starts with no defender at all: a2.

The setup belongs to the BastionScout family; read right to left it becomes position 309.

The engine's main line opens with e4, putting a pawn straight into the centre.

Morozov Balance Index: 21 of 100 — class D — largest edge. Engine evaluation of the starting position: +36 centipawns for White (depth 43, 400 000 000 nodes).

Explore position #362

Provenance

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

Pack 006 · SP-362

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