Winning blow: rook to f8 (f1·21)
c9-09440naming 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 1870 ShuffleRating — for advanced tacticians.
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 h1, queen d5, rook f1, bishop b1 c3, knight b3 e3, pawn a2 b2 g2 e4.
Black: king h7, rook h6 f8, bishop c8, knight e6, pawn h2 g4 b6 b7 e7.
11 white and 10 black pieces are on the board; the puzzle position arises after move 27.
The position in numbers
White are ahead by 9 points of material (30 against 21; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h1, the black king on h7.
It is White to move on move 27, with 55 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 5. Files fully open (no pawns of either colour): c, d, f — natural highways for the rooks and queen. Half-open for White: h.
White hold the bishop pair, an edge in open lines. The White king has 0 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
27. Rxf8 Ng7 28. Qg8+ Kg6 29. Qxg7+
Why it works
- Great move! rook to f8 keeps the pressure (#4).
- Spot on — queen to g8 (#4).
- Precise: queen to g7 is the top choice (#3).
- You win a piece — the rook.
- If instead Ng7, then e5+ and you win the rook.
Move by move
- 27. Rxf8 — rook to f8 (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 #52.
SP-52 · RampartScout — A knight in the corner and the king out on the wing (b/g); like every family, it is closed under mirror twins.
The king starts on g1, the rooks on e1 and h1, the queen on f1.
The king already stands on its castled square, so castling short moves only the rook, from h1 to f1.
The bishops stand on b1 and c1; their long diagonals reach h7 and h6 once the c- and d-pawns step aside.
Every pawn on the second rank is defended from the very first move.
The setup belongs to the RampartScout family; read right to left it becomes position 910.
The engine's main line opens with f4.
Morozov Balance Index: 62 of 100 — class B — balanced. Engine evaluation of the starting position: +18 centipawns for White (depth 49, 400 000 000 nodes).
In 50 self-play games White scored 55.0% (95% CI 41.3–67.9%).
Explore position #52Provenance
Mined from the project's engine self-play games.
Pack 014 · SP-52
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