Fork: pawn to f6 (f7)
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The tactical motive
Fork: one piece attacks two targets at once — they can't both be saved.
Difficulty 2192 ShuffleRating — expert level — few solve it at first try.
Black to move — find the best continuation
How to recognize this tactic
A fork is one piece attacking two targets at once. Look for a knight, pawn or queen move that lands where it hits the king (or a bigger piece) and a second undefended unit on the same turn — the opponent can save only one.
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 d2, rook a1 g1, bishop e5, pawn c2 f2 h2 a3 d3 f3 b4 e4.
Black: king g8, queen d8, rook a8 f8, knight h4, pawn b6 c6 b7 c7 f7 g7 h7.
13 white and 12 black pieces are on the board; the puzzle position arises after move 16.
The position in numbers
White are ahead by 1 points of material (30 against 29; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on f1, the black king on g8.
It is Black to move on move 16, with 32 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 8 pawns, Black 7. No file is fully open, so the heavy pieces have to be pried in. Half-open for Black: a, d, e.
The Black king has 1 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
16... f6 17. Bb2 Nxf3 18. Qc3 Nxg1
Why it works
- Great move! pawn to f6 keeps the pressure (+2.6).
- Well found: knight to f3 (+2.9).
- Stunning! knight to g1 gives up material but you stand better (+2.9).
- You win a piece — the rook.
- If instead Bb2, then Nxf3 and you stay on top.
Move by move
- 16… f6 — pawn to f6
- 17. Bb2 — bishop to b2
- Nxf3 — knight to f3 (capture)
- 18. Qc3 — queen to c3
- Nxg1 — knight to g1 (capture)
Types in this puzzle
Knight fork
One knight move attacks two targets at once — the opponent can only save one.
A fork is one move that attacks two targets at once, and no piece forks better than the knight. Look through the knight's eyes: it jumps in an L and never moves along straight lines, which is exactly why its threats get missed. Both victims of a knight fork always stand on squares of one color, while the knight strikes from the opposite color. Hunt for the square from which the knight hits the king and a heavy piece at once.
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.
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?
Provenance
Derived from the Lichess puzzle database (CC0).
Verified by Stockfish at depth 20+.
Solution forcedness confirmed (verified).
Pack 015
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