Fork: knight to f7 (d6·2)
li-06ODCnaming tag (square·N)Opens in the app if installed, otherwise downloads the APK.
The tactical motive
Fork: one piece attacks two targets at once — they can't both be saved.
Difficulty 2028 ShuffleRating — expert level — few solve it at first try.
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 h1, queen d2, rook e1, knight e5 d6, pawn h2 e3 b4 d4 c5.
Black: king h8, queen g5, rook g7 a8, bishop g4, knight d5, pawn e4 a6 c6 e6 b7 h7.
10 white and 12 black pieces are on the board; the puzzle position arises after move 29.
The position in numbers
Black are ahead by 6 points of material (25 against 31; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h1, the black king on h8.
It is White to move on move 29, with 38 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 6. Files fully open (no pawns of either colour): f, g — natural highways for the rooks and queen. Half-open for White: a.
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
29. Ndf7+ Kg8 30. Nxg5
Why it works
- Great move! knight to f7 keeps the pressure (+3.8).
- Well found: knight to g5 (+3.6).
- You win a piece — the queen.
- If instead Kg8, then Nxg5 and you win the queen.
Move by move
- 29. Ndf7+ — knight to f7 with check
- Kg8 — king to g8
- 30. Nxg5 — knight to g5 (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.
Provenance
Derived from the Lichess puzzle database (CC0).
Verified by Stockfish at depth 20+.
Solution forcedness confirmed (verified).
Pack 014
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