Winning blow: rook to g1 (b1)
c9-17923naming 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 1390 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 e2, queen h7, rook b1, knight d3, pawn a2 b2 d2 c3 e4.
Black: king e8, queen f6, rook b8, knight c4 b6, pawn d6 a7 b7 c7.
9 white and 9 black pieces are on the board; the puzzle position arises after move 23.
The position in numbers
Black are ahead by 2 points of material (22 against 24; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on e2, the black king on e8.
It is White to move on move 23, with 36 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): f, g, h — natural highways for the rooks and queen.
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. Rg1 Nd7 24. Rg8+ Nf8 25. Qxc7 Rd8 26. Qxc4
Why it works
- Great move! rook to g1 keeps the pressure (+4.4).
- Spot on — rook to g8 (+4.2).
- Strong! queen to c7 is the sharp choice (+4.1).
- Great move! queen to c4 keeps the pressure (+4.2).
- You win a piece — the knight.
- If instead Nd7, then Rg8+ and you stay on top.
Move by move
- 23. Rg1 — rook to g1
- Nd7 — knight to d7
- 24. Rg8+ — rook to g8 with check
- Nf8 — knight to f8
- 25. Qxc7 — queen to c7 (capture)
- Rd8 — rook to d8
- 26. Qxc4 — queen to c4 (capture)
Types in this puzzle
Queen fork
The queen lands on a square from which it attacks two targets at once.
The queen strikes along files, ranks and diagonals, so she forks more often than any other piece. Look for a square where the queen attacks two undefended targets at once — most often a check combined with a loose piece. Diagonal blows are especially venomous: a slanting check that also eyes a rook in the corner is the classic of the genre. Remember that both targets must be unprotected, or your «fork» is just a shot into the air.
Quiet move
No check, no capture — yet this modest move decides the game.
A quiet move gives no check and takes nothing — yet it decides the game by creating an unstoppable threat or stealing the king's last square. This is the hardest class of moves: the eye hunts for loud blows while a modest shift does the winning. The clue: every forcing try runs into a defense, so seek the move that strengthens the threat or takes squares away. Train yourself to ask: what if I neither capture nor check, but quietly improve?
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 010 · SP-189
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