Final position — White is winning
Bird's Opening: Knight Fork
White wins in 10 moves with a decisive material gain. (Quabeck - Heuacker, Frankfurt 1936)
The moves
| 1. | f4 | Nf6 |
| 2. | c4 | d5 |
| 3. | cxd5 | Nxd5 |
| 4. | d3 | e5 |
| 5. | fxe5 | Bb4+ |
| 6. | Bd2 | Ne3 |
| 7. | Qa4+ | b5 |
| 8. | Qxb5+ | Bd7 |
| 9. | Qb7 | Bc6 |
| 10. | Qxb4 | Nc2+ |
How the Bird's Opening: Knight Fork works
The Bird's Opening: Knight Fork is a classic chess opening trap arising from the Bird's opening. In this line White wins decisive material by move 10, punishing a natural-looking but losing idea from Black.
The full sequence runs 1.f4 Nf6 2.c4 d5 3.cxd5 Nxd5 4.d3 e5 5.fxe5 Bb4+ 6.Bd2 Ne3 7.Qa4+ b5 8.Qxb5+ Bd7 9.Qb7 Bc6 10.Qxb4 Nc2+. Each move looks reasonable, which is exactly why the trap is so effective over the board — Black walks into it while trying to play "normal" developing moves.
This pattern is well known from master and correspondence play (Quabeck - Heuacker, Frankfurt 1936). Recognising it early lets you either spring it as White or sidestep it as Black.
Practice this trap move-by-move
Open the Bird's Opening: 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.