Winning blow: rook to d7 (d3·5)
c9-20874naming tag (square·N)Opens in the app if installed, otherwise downloads the APK.
The tactical motive
Chess960 twist: use the unusual starting setup of the pieces.
Winning tactic: there is a move that gains a decisive advantage — find it.
Difficulty 1430 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.
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 b1, rook d3 c7, bishop a1, knight c8, pawn a2 d2 e2 f2 h4.
Black: king e8, queen h5, rook g8, bishop h1, knight d7, pawn b4 f4 g4 e6 a7.
10 white and 10 black pieces are on the board; the puzzle position arises after move 25.
The position in numbers
Black are ahead by 4 points of material (21 against 25; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on b1, the black king on e8.
It is White to move on move 25, with 39 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 5. Files fully open (no pawns of either colour): c — natural highways for the rooks and queen. Half-open for White: b, g.
The White king has 3 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
25. Rdxd7 Qg6+ 26. d3 e5 27. Nd6+ Qxd6 28. Rxd6
Why it works
- Best move. rook to d7 is exactly what the engine plays (+5.4).
- pawn to d3 develops smoothly.
- Precise: knight to d6 is the top choice (+7.4).
- Great move! rook to d6 keeps the pressure (+7.5).
- You win a piece — the queen.
- If instead Qg6+, then d3 and you win the knight.
Move by move
- 25. Rdxd7 — rook to d7 (capture)
- Qg6+ — queen to g6 with check
- 26. d3 — pawn to d3
- e5 — pawn to e5
- 27. Nd6+ — knight to d6 with check
- Qxd6 — queen to d6 (capture)
- 28. Rxd6 — rook to d6 (capture)
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.
About this position
These pieces come from starting position #560.
SP-560 · ThroneGuard — The king starts in the middle of the back rank, on d or e, and neither knight begins in a corner.
The king starts on e1, the rooks on c1 and g1, the queen on h1.
Castling ends where it always does: king to g1 and rook to f1 on the short side, king to c1 and rook to d1 on the long one.
A bishop starts in the corner on a1: it has a single diagonal, which the b-pawn unlocks, running out to h8.
The pawn on e2 is defended by the king alone — the same soft spot f2 is in the classical setup.
The setup belongs to the ThroneGuard family; read right to left it becomes position 495.
The engine's main line opens with g3.
Morozov Balance Index: 7 of 100 — class D — largest edge. Engine evaluation of the starting position: +46 centipawns for White (depth 45, 400 000 000 nodes).
Explore position #560Provenance
Mined from the project's engine self-play games.
Pack 010 · SP-560
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