Fork: knight to b5
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The tactical motive
Fork: one piece attacks two targets at once — they can't both be saved.
Difficulty 1152 ShuffleRating — club-player level.
White 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 d2, rook c1, knight d4, pawn g2 f3 h3.
Black: king d6, rook a3, knight e5, pawn h4 b5 d5 f6 g6.
6 white and 8 black pieces are on the board; the puzzle position arises after move 61.
The position in numbers
Black are ahead by 2 points of material (11 against 13; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on d2, the black king on d6.
It is White to move on move 61, with 28 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 3 pawns, Black 5. Files fully open (no pawns of either colour): a, c, e — natural highways for the rooks and queen. Half-open for White: b, d.
The White king has 4 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
61. Nxb5+ Kd7 62. Nxa3
Why it works
- Great move! knight to b5 keeps the pressure (+4.9).
- Well found: knight to a3 (+5.1).
- You win a piece — the rook.
- If instead Kd7, then Nxa3 and you win the rook.
Move by move
- 61. Nxb5+ — knight to b5 (capture) with check
- Kd7 — king to d7
- 62. Nxa3 — knight to a3 (capture)
Types in this puzzle
Royal fork
A fork with check: the king must move, and the second piece is lost.
A royal fork is a fork with check — one of the two targets is the king itself. The check must be answered first, so nobody is left to rescue the second piece. Look for squares where your piece gives check and simultaneously attacks an undefended queen or rook. It is the most reliable fork of all, because your opponent literally has no choice.
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.
Endgame tactic
Tactics live in the endgame too — strike while material is scarce.
Tactics do not retire when the queens come off: forks, pins and double attacks live on in the endgame. With so little material left, every tactical loss is almost always decisive. The signs are the usual ones — undefended pieces, king and piece on one line, a pawn about to promote. Even in a "technical" ending, scan for a shot before every move, both yours and your opponent's.
Provenance
Derived from the Lichess puzzle database (CC0).
Verified by Stockfish at depth 20+.
Solution forcedness confirmed (verified).
Pack 007
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