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Winning blow: pawn to d6 (d5·11)

Shuffle Rating 1610Theme: 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 1610 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 f1, queen c1, rook d1 g1, bishop a1 h1, knight e1 c3, pawn a2 b2 e2 f2 g3 h4 d5.

Black: king g8, queen b7, rook d8 f8, bishop a8 h8, knight a6 e8, pawn b6 g6 a7 d7 e7 f7 h7.

15 white and 15 black pieces are on the board; the puzzle position arises after move 8.

The position in numbers

Material is level — 38 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).

The white king stands on f1, the black king on g8.

It is White to move on move 8, with 35 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 7 pawns, Black 7. Files fully open (no pawns of either colour): c — 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

8. d6 Qxh1 9. Rxh1

Why it works

  • Great move! pawn to d6 keeps the pressure (+4.6).
  • Well found: rook to h1 (+4.7).
  • You win a piece — the queen.
  • If instead Qxh1, then Rxh1 and you win the queen.

Move by move

  • 8. d6 — pawn to d6
  • Qxh1 — queen to h1 (capture)
  • 9. Rxh1 — rook to h1 (capture)

Types in this puzzle

Discovered attack

A piece steps aside and opens a second attack from the piece behind it.

A discovered attack works like a curtain: one piece steps off the line and unveils the long-range piece behind it. The beauty is that the moving piece can create a second threat of its own — two attacks in one move. Look for your stacked pairs: a bishop or rook behind a knight or pawn, aimed through them at something valuable. Send the front piece to the most aggressive square — a discovery without a second threat wastes half its power.

Development punish

Half the army still asleep — the attack breaks through.

Punishing lazy development: half of your opponent's army is asleep on its starting squares, which means you outnumber him where the fight is. Count not the pieces on the board but the pieces in play — if five or more of his pieces have never moved, look for a forcing attack. The sign is a development lead plus open lines toward his king. Strike immediately: give him two quiet moves and the advantage evaporates.

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 #115.

SP-115 · BastionGuard — The king starts one file off-centre, on c or f, with neither knight in a corner.

The king starts on f1, the rooks on d1 and g1, the queen on c1.

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

A bishop starts in the corner on a1: it has a single diagonal, which the b-pawn unlocks, running out to h8.

The second rank carries 2 pawns with no defender at all: a2, h2.

The setup belongs to the BastionGuard family; read right to left it becomes position 835.

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

Morozov Balance Index: 94 of 100 — class A — most balanced. Engine evaluation of the starting position: +10 centipawns for White (depth 46, 400 000 000 nodes).

Explore position #115

Provenance

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

Pack 011 · SP-115

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