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Winning blow: pawn to f6 (e5·8)

Shuffle Rating 1060Theme: 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 1060 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 b1, queen a6, rook e1, knight c4 d4, pawn h2 c3 a4 b4 e5.

Black: king f8, queen f6, rook b8 e8, knight d3 f7, pawn g4 b6 a7 c7 h7.

10 white and 11 black pieces are on the board; the puzzle position arises after move 26.

The position in numbers

Black are ahead by 5 points of material (25 against 30; 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 f8.

It is White to move on move 26, with 38 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 5 pawns, Black 5. Files fully open (no pawns of either colour): d, f — natural highways for the rooks and queen. Half-open for White: g.

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

26. exf6 Rxe1+ 27. Kc2 Rd8 28. Kxd3

Why it works

  • Great move! pawn to f6 keeps the pressure (+3.3).
  • Well found: king to c2 (+3.1).
  • Precise: king to d3 is the top choice (+3.6).
  • You win a piece — the queen.
  • If instead Rxe1+, then Kc2 and you win the queen.

Move by move

  • 26. exf6 — pawn to f6 (capture)
  • Rxe1+ — rook to e1 (capture) with check
  • 27. Kc2 — king to c2
  • Rd8 — rook to d8
  • 28. Kxd3 — king to d3 (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.

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.

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.

About this position

These pieces come from starting position #851.

SP-851 · BastionGuard — Off-centre king (c/f), no knight on the a- or h-file.

The king starts on c1, the rooks on b1 and e1, the queen on g1.

The king already stands on c1, so castling long moves only the rook, from b1 to d1.

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

One second-rank pawn starts with no defender at all: a2.

The setup belongs to the BastionGuard family; read right to left it becomes position 99.

The engine's main line opens with e4, putting a pawn straight into the centre.

Morozov Balance Index: 80 of 100 — class A — most balanced. Engine evaluation of the starting position: +17 centipawns for White (depth 42, 400 000 000 nodes).

Explore position #851

Provenance

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

Pack 006 · SP-851

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