Attack on the uncastled king: rook to g3 (g1·2)
c9-27093naming 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.
Uncastled king: the enemy king is stuck in the centre — punish it before it castles.
Winning tactic: there is a move that gains a decisive advantage — find it.
Difficulty 1200 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.
An uncastled king in the centre is a standing target. Look for ways to open the central files and diagonals against it with checks and threats before it can shelter — every tempo the king spends in the middle is a chance for a combination.
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, queen e2, rook g1 h4, bishop h1, knight d1 d3, pawn b2 c2 a5 e5.
Black: king b8, queen d8, rook g3 a8, bishop e8 h8, knight a7, pawn h5 a6 e6 b7 c7.
11 white and 12 black pieces are on the board; the puzzle position arises after move 22.
The position in numbers
Black are ahead by 1 points of material (32 against 33; 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 b8.
It is White to move on move 22, with 47 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): d, f, g — natural highways for the rooks and queen. Half-open for White: h.
Black hold the bishop pair, an edge in open lines. 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
22. Rxg3 Qxh4 23. Qf3 Nc6 24. Rg8 O-O-O 25. Rxh8
Why it works
- Great move! rook to g3 keeps the pressure (+3.4).
- queen to f3 develops smoothly.
- Strong! rook to g8 is the sharp choice (+3.6).
- Great move! rook to h8 keeps the pressure (+3.4).
- You win a piece — the rook.
- If instead Qxh4, then Qf3 and you stay on top.
Move by move
- 22. Rxg3 — rook to g3 (capture)
- Qxh4 — queen to h4 (capture)
- 23. Qf3 — queen to f3
- Nc6 — knight to c6
- 24. Rg8 — rook to g8
- O-O-O — king to a8
- 25. Rxh8 — rook to h8 (capture)
Types in this puzzle
Rook fork
The rook attacks two targets along rank and file at the same time.
A rook fork attacks two targets from one square — one along the file, the other along the rank. Look for enemy pieces standing at a right angle to each other, both visible from a single safe square. This is bread and butter in endgames, where a rook check picks up loose pieces and pawns along the way. Test every rook check you have: does it also hit something valuable on the other line?
Uncastled king
The king lingered in the middle — punish the delay.
Punishing the uncastled king: your opponent delayed castling, and now his king is stuck on its starting square under fire. In Chess960 this is deadlier than in classical chess — the king may start in the center or near the edge, and the familiar defensive setups simply do not apply. The signs: the victim still holds castling rights, and the files toward his king are half-open. Open lines before the king manages to hide.
About this position
These pieces come from starting position #747.
SP-747 · RampartGuard — King pushed to the b- or g-file, knights off the edges — 144 positions here.
The king starts on b1, the rooks on a1 and g1, the queen on f1.
From b1 the king makes the longest journey Chess960 allows when castling short: five squares to g1.
A bishop starts in the corner on h1: it has a single diagonal, which the g-pawn unlocks, running out to a8.
One second-rank pawn starts with no defender at all: h2.
The setup belongs to the RampartGuard family; read right to left it becomes position 401.
The engine's main line opens with a4.
Morozov Balance Index: 75 of 100 — class B — balanced. Engine evaluation of the starting position: +19 centipawns for White (depth 45, 400 000 000 nodes).
Explore position #747Provenance
Mined from the project's engine self-play games.
Pack 008 · SP-747
Similar puzzles
In your browser or in the Android app. Nothing to install · Free, no ads