Final position — Black is winning
Budapest Defence: Nxf2 Sacrifice (Rajacajn–Wall)
Black wins in 9 moves with a decisive material gain. (Rajacajn - Wall, Bill, 1996.??.??)
The moves
| 1. | d4 | Nf6 |
| 2. | c4 | e5 |
| 3. | dxe5 | Ng4 |
| 4. | Qd4 | d6 |
| 5. | exd6 | Bxd6 |
| 6. | c5 | Nc6 |
| 7. | Qd1 | Nxf2 |
| 8. | Kxf2 | Bg3+ |
| 9. | hxg3 | Qxd1 |
How the Budapest Defence: Nxf2 Sacrifice (Rajacajn–Wall) works
The Budapest Defence: Nxf2 Sacrifice (Rajacajn–Wall) is a classic chess opening trap arising from the Budapest Defence. In this line Black wins decisive material by move 9, punishing a natural-looking but losing idea from White.
The full sequence runs 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Qd4 d6 5.exd6 Bxd6 6.c5 Nc6 7.Qd1 Nxf2 8.Kxf2 Bg3+ 9.hxg3 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 (Rajacajn - Wall, Bill, 1996.??.??). 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 (Rajacajn–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.