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Winning blow: knight to f3

c9-06143
Shuffle Rating 780Theme: 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 780 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.

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 d1, queen h4, rook f1 c2, bishop a1, knight e1 e2, pawn a2 d2 f2 b3 g3 g4.

Black: king e7, queen b5, rook c8 g8, bishop f3 h8, knight f6 e8, pawn c5 e6 a7 f7.

13 white and 12 black pieces are on the board; the puzzle position arises after move 16.

The position in numbers

Black are ahead by 1 points of material (34 against 35; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.

The white king stands on d1, the black king on e7.

It is White to move on move 16, with 31 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 6 pawns, Black 4. Files fully open (no pawns of either colour): h — natural highways for the rooks and queen. Half-open for White: c, e.

Black hold the bishop pair, an edge in open lines. 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

16. Nxf3 Nd6 17. Ne5 a5 18. d3

Why it works

  • Great move! knight to f3 keeps the pressure (+2.7).
  • knight to e5 develops smoothly.
  • Precise: pawn to d3 is the top choice (+3.0).
  • You win a piece — the bishop.
  • If instead Qb7, then Ne5 and you win the bishop.

Move by move

  • 16. Nxf3 — knight to f3 (capture)

Types in this puzzle

Hanging piece

A piece is left without protection — just take it.

A hanging piece is simply an unprotected piece you can take for free. It sounds primitive, yet most amateur games are decided exactly this way. Build the habit: before every move, sweep the board and note every undefended piece, yours and theirs. The classic mistake is hunting for a brilliant combination when all you need to do is bend down and pick up the gift.

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 #771.

SP-771 · ThroneGuard — Both knights start on inner files (b–g) while the king sits centrally on d or e — one of 204 positions filed here.

The king starts on d1, the rooks on c1 and f1, the queen on b1.

Castling long simply swaps the two pieces: the king on d1 and the rook on c1 trade places.

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: h2.

The setup belongs to the ThroneGuard family; read right to left it becomes position 179.

The engine's main line opens with b4.

Morozov Balance Index: 83 of 100 — class A — most balanced. Engine evaluation of the starting position: +16 centipawns for White (depth 47, 400 000 000 nodes).

Explore position #771

Provenance

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

Verified by Stockfish at depth 20+.

Solution forcedness confirmed (verified).

Pack 002 · SP-771

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