Winning blow: king to f1 (e1·16)
c9-13775naming 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 1250 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 e1, queen f2, rook b1 h1, bishop d1, knight d3 b4, pawn a2 d2 e2 b3 c3.
Black: king c8, queen h8, rook d8 g8, knight g2 e7, pawn f4 f5 a7 b7 c7 d7 h7.
12 white and 13 black pieces are on the board; the puzzle position arises after move 18.
The position in numbers
White are ahead by 1 points of material (33 against 32; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on e1, the black king on c8.
It is White to move on move 18, with 2 legal replies to weigh — only the line that keeps the advantage solves the puzzle. White are in check right now, so every reply must answer the check.
White keeps 5 pawns, Black 7. Files fully open (no pawns of either colour): g — natural highways for the rooks and queen. Half-open for White: f, h.
The White king has 1 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
18. Kf1 Qg7 19. Ne1 Ne3+ 20. dxe3
Why it works
- Great move! king to f1 keeps the pressure (+2.2).
- knight to e1 develops smoothly.
- Strong! pawn to e3 is the sharp choice (+2.9).
- You win a piece — the knight.
- If instead Qg7, then Ne1 and you stay on top.
Move by move
- 18. Kf1 — king to f1
- Qg7 — queen to g7
- 19. Ne1 — knight to e1
- Ne3+ — knight to e3 with check
- 20. dxe3 — pawn to e3 (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 #189.
SP-189 · ThroneScout — Centre-file king, rim knight: 204 of the 960 positions share this pattern.
The king starts on e1, the rooks on b1 and f1, the queen on h1.
The kingside rook already stands on f1, so castling short moves only the king, from e1 to g1.
The bishops stand on d1 and g1; their long diagonals reach h5 and a7 once the e- and f-pawns step aside.
The pawn on d2 is defended by the king alone — the same soft spot f2 is in the classical setup.
The setup belongs to the ThroneScout family; read right to left it becomes position 776.
The engine's main line opens with Nab3, bringing the knight out to b3.
Morozov Balance Index: 61 of 100 — class B — balanced. Engine evaluation of the starting position: +23 centipawns for White (depth 44, 400 000 000 nodes).
Explore position #189Provenance
Mined from the project's engine self-play games.
Pack 008 · SP-189
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