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Winning blow: bishop to g3 (d6)

Shuffle Rating 1200Theme: 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 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.

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 h2, queen e2, rook e7, bishop d6, knight b3, pawn g2 c3 a5.

Black: king c8, queen b1, rook g8, knight a8 h8, pawn g3 h6 a7 b7.

8 white and 9 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 (23 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 h2, the black king on c8.

It is White to move on move 22, with 2 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 3 pawns, Black 4. Files fully open (no pawns of either colour): d, e, f — natural highways for the rooks and queen. Half-open for White: b, h.

The White king has 1 empty squares to step to right now — the fewer they are, the closer a mating net.

Solution & explanation

Main line

22. Bxg3 Qg6 23. Qe5 Qxg3+ 24. Qxg3 Rxg3 25. Kxg3

Why it works

  • Great move! bishop to g3 keeps the pressure (+5.1).
  • queen to e5 develops smoothly.
  • Strong! queen to g3 is the sharp choice (+5.2).
  • Great move! king to g3 keeps the pressure (+5.2).
  • You win a piece — the queen.
  • If instead Qg6, then Qe5 and you stay on top.

Move by move

  • 22. Bxg3 — bishop to g3 (capture)
  • Qg6 — queen to g6
  • 23. Qe5 — queen to e5
  • Qxg3+ — queen to g3 (capture) with check
  • 24. Qxg3 — queen to g3 (capture)
  • Rxg3 — rook to g3 (capture)
  • 25. Kxg3 — king to g3 (capture)

Types in this puzzle

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.

Counter-strike

Don't defend — answer the threat with a bigger one.

The counter-strike: instead of defending against the threat, you answer with a bigger threat of your own. While your opponent grabs a pawn, you deliver mate — the arithmetic favors you. Look for a counter when direct defenses fail: do you have a check, an attack on the queen, a mating threat? The beginner's error is meeting every threat with a reflexive defense without checking the counterattacking resources first.

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.

About this position

These pieces come from starting position #308.

SP-308 · BastionScout — The king starts one file off-centre, on c or f, and a knight begins in a corner.

The king starts on f1, the rooks on e1 and g1, the queen on d1.

Castling short simply swaps the two pieces: the king on f1 and the rook on g1 trade places.

The bishops stand on b1 and c1; their long diagonals reach h7 and h6 once the c- and d-pawns step aside.

One second-rank pawn starts with no defender at all: h2.

The setup belongs to the BastionScout family; read right to left it becomes position 366.

The engine's main line opens with O-O, bringing the king out to g1.

Morozov Balance Index: 40 of 100 — class C — noticeable edge. Engine evaluation of the starting position: +29 centipawns for White (depth 46, 400 000 000 nodes).

Explore position #308

Provenance

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

Pack 008 · SP-308

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