Final position — Black is winning
King's Knight Opening: Knight Fork (Sitter–Wall)
Black wins in 7 moves with a decisive material gain. (Sitter-Wall, Internet 1997)
The moves
| 1. | e4 | e5 |
| 2. | Nf3 | f5 |
| 3. | Nxe5 | Qe7 |
| 4. | Qh5+ | g6 |
| 5. | Nxg6 | Qxe4+ |
| 6. | Be2 | Nf6 |
| 7. | Qf3 | hxg6 |
How the King's Knight Opening: Knight Fork (Sitter–Wall) works
The King's Knight Opening: Knight Fork (Sitter–Wall) is a classic chess opening trap arising from the King's knight opening. In this line Black wins decisive material by move 7, punishing a natural-looking but losing idea from White.
The full sequence runs 1.e4 e5 2.Nf3 f5 3.Nxe5 Qe7 4.Qh5+ g6 5.Nxg6 Qxe4+ 6.Be2 Nf6 7.Qf3 hxg6. Each move looks reasonable, which is exactly why the trap is so effective over the board — White walks into it while trying to play "normal" developing moves.
This pattern is well known from master and correspondence play (Sitter-Wall, Internet 1997). Recognising it early lets you either spring it as Black or sidestep it as White.
Practice this trap move-by-move
Open the King's Knight Opening: Knight Fork (Sitter–Wall) in the Trapsterapp to play it out on a live board, drill it in practice mode, and learn how to avoid it when it's set for you — along with the full library of chess traps and gambits, fully offline.