Final position — Black is winning
Queen Sacrifice for a Knight fork
Black wins in 10 moves with a decisive material gain. (50 Opening Traps,Part 1 - Queen Sacrifice for a Knight fork - A00 - https://lichess.org/@/CHESSLUCAFD)
The moves
| 1. | g3 | g6 |
| 2. | Bg2 | Bg7 |
| 3. | e4 | c5 |
| 4. | d3 | Nc6 |
| 5. | c3 | d6 |
| 6. | Be3 | Qb6 |
| 7. | Qd2 | Ne5 |
| 8. | Na3 | Qxb2 |
| 9. | Qxb2 | Nxd3+ |
| 10. | Kd2 | Nxb2 |
How the Queen Sacrifice for a Knight fork works
The Queen Sacrifice for a Knight fork is a classic chess opening trap arising from the Hungarian Opening: Symmetrical Variation. In this line Black wins decisive material by move 10, punishing a natural-looking but losing idea from White.
The full sequence runs 1.g3 g6 2.Bg2 Bg7 3.e4 c5 4.d3 Nc6 5.c3 d6 6.Be3 Qb6 7.Qd2 Ne5 8.Na3 Qxb2 9.Qxb2 Nxd3+ 10.Kd2 Nxb2. 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 (50 Opening Traps,Part 1 - Queen Sacrifice for a Knight fork - A00 - https://lichess.org/@/CHESSLUCAFD). Recognising it early lets you either spring it as Black or sidestep it as White.
Practice this trap move-by-move
Open the Queen Sacrifice for a Knight fork 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.