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Winning blow: queen to g6 (g3·9)

Shuffle Rating 1700Theme: 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.

Winning tactic: there is a move that gains a decisive advantage — find it.

Difficulty 1700 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 b1, queen g3, rook g1 h4, bishop h1, pawn b2 e3 h3 a4.

Black: king a7, queen g6, rook c4 g8, bishop d7, pawn a5 d5 f5 b6.

9 white and 9 black pieces are on the board; the puzzle position arises after move 31.

The position in numbers

Material is level — 26 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).

The white king stands on b1, the black king on a7.

It is White to move on move 31, with 36 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 4 pawns, Black 4. Files fully open (no pawns of either colour): c, g — natural highways for the rooks and queen. Half-open for White: d, f.

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

31. Qxg6 Rxg6 32. Rxg6 Rxh4 33. Rg7 Kb7 34. Rxd7+

Why it works

  • Great move! queen to g6 keeps the pressure (+4.1).
  • Well found: rook to g6 (+4.2).
  • Strong! rook to g7 is the sharp choice (+4.2).
  • Great move! rook to d7 keeps the pressure (+4.2).
  • You win a piece — the queen.
  • If instead Rxg6, then Rxg6 and you win the queen.

Move by move

  • 31. Qxg6 — queen to g6 (capture)
  • Rxg6 — rook to g6 (capture)
  • 32. Rxg6 — rook to g6 (capture)
  • Rxh4 — rook to h4 (capture)
  • 33. Rg7 — rook to g7
  • Kb7 — king to b7
  • 34. Rxd7+ — rook to d7 (capture) with check

Types in this puzzle

Win the pinned piece

The pinned piece cannot run — attack it again and win it.

A pinned piece cannot flee, which means you can win it outright by attacking it one more time. Count attackers against defenders: if you outnumber them, the piece is yours. The best extra attacker is a pawn, since it costs less than anything it might capture. Do not rush the capture — build up the pressure first, then harvest.

Simplification

Trade the heavy pieces and steer into a won endgame.

Simplification is how you convert an advantage: by trading queens and rooks you extinguish the counterplay and steer the game into a won endgame. The rule is simple — the side with extra material trades pieces but keeps pawns. Look for exchanges once the material is already won and your opponent is still rattling threats. The mistake is avoiding the queen trade and letting him muddy the water forever.

Winning exchange

A forced series of captures on one square ends in your favour.

A winning exchange is a forced series of captures on one square that leaves you ahead in material. It is pure arithmetic: count the attackers and defenders of the square and note the value of every piece in the queue. Capture in the right order — cheap pieces first, expensive ones later — or a winning trade turns into a losing one. The classic error is stopping the count halfway and missing the opponent's final recapture.

About this position

These pieces come from starting position #743.

SP-743 · RampartGuard — A wing king (b/g) with no knight on the a- or h-file.

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 402.

The engine's main line opens with a4.

Morozov Balance Index: 69 of 100 — class B — balanced. Engine evaluation of the starting position: +21 centipawns for White (depth 47, 400 000 000 nodes).

Explore position #743

Provenance

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

Pack 013 · SP-743

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