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Attack on the uncastled king: rook to g2 (g1·7)

Shuffle Rating 970Theme: Chess960 twist: use the unusual starting setup of the pieces.
White to move — find the best continuation

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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 970 ShuffleRating — for beginners taking their first steps in Chess960 tactics.

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 f2, queen a2, rook g1, bishop b6, knight d2, pawn b2 c3 f3 g3 e4.

Black: king f8, queen h2, rook e8, pawn d3 f5 a7 b7 e7 g7.

10 white and 9 black pieces are on the board; the puzzle position arises after move 24.

The position in numbers

White are ahead by 5 points of material (25 against 20; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.

The white king stands on f2, the black king on f8.

It is White to move on move 24, with 4 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 6. Files fully open (no pawns of either colour): h — natural highways for the rooks and queen. Half-open for White: a, d.

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

24. Rg2 Qh5 25. Qd5 e6 26. Qd6+

Why it works

  • Great move! rook to g2 keeps the pressure (+5.2).
  • queen to d5 develops smoothly.
  • Precise: queen to d6 is the top choice (+6.1).
  • You win decisive material (+6.1).
  • If instead Qh1, then Qb1 and you stay on top.

Move by move

  • 24. Rg2 — rook to g2

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.

Only move

Everything else loses — find the only move that holds.

An only move is a position where everything loses except one single continuation. You cannot play "by hand" here: run through fundamentally different defenses — run away, block, trade, counterattack — and discard the ones that fail. The hallmark of these puzzles is that the obvious moves lose quickly while the solution often looks strange. First understand exactly what the threat is — then the one saving move reveals itself.

Blocking save

Block the check with tempo — and turn the game around.

The blocking save: you interpose a piece against the check — not passively, but with tempo, so the blocker creates a threat of its own. Such a block turns defense into attack. Whenever you are checked, compare all three replies — capture, move the king, interpose — and among the interpositions hunt for the one that counterattacks. The mistake is automatically stepping aside with the king when an active block would have turned the game around.

About this position

These pieces come from starting position #28.

SP-28 · BastionScout — A knight on the a- or h-file, king on c or f — the mirror twin lands here as well.

The king starts on f1, the rooks on e1 and h1, the queen on c1.

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.

The bishops stand on b1 and g1; their long diagonals reach h7 and a7 once the c- and f-pawns step aside.

The pawn on g2 is defended by the king alone — the same soft spot f2 is in the classical setup.

The setup belongs to the BastionScout family; read right to left it becomes position 940.

The engine's main line opens with d4, putting a pawn straight into the centre.

Morozov Balance Index: 55 of 100 — class B — balanced. Engine evaluation of the starting position: +25 centipawns for White (depth 47, 400 000 000 nodes).

Explore position #28

Provenance

Mined from the project's engine self-play games.

Pack 005 · SP-28

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