Final position — Black is winning
Budapest Defence: Nxf2 Sacrifice (Preston–Wall)
Black wins in 8 moves with a decisive material gain. (Preston - Wall, Thailand 1973)
The moves
| 1. | d4 | Nf6 |
| 2. | c4 | e5 |
| 3. | dxe5 | Ng4 |
| 4. | Nf3 | d6 |
| 5. | exd6 | Bxd6 |
| 6. | h3 | Nxf2 |
| 7. | Kxf2 | Bg3+ |
| 8. | Kxg3 | Qxd1 |
How the Budapest Defence: Nxf2 Sacrifice (Preston–Wall) works
The Budapest Defence: Nxf2 Sacrifice (Preston–Wall) is a classic chess opening trap arising from the Budapest Defence. In this line Black wins decisive material by move 8, punishing a natural-looking but losing idea from White.
The full sequence runs 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3 d6 5.exd6 Bxd6 6.h3 Nxf2 7.Kxf2 Bg3+ 8.Kxg3 Qxd1. 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 (Preston - Wall, Thailand 1973). Recognising it early lets you either spring it as Black or sidestep it as White.
Practice this trap move-by-move
Open the Budapest Defence: Nxf2 Sacrifice (Preston–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.