Final position — White is winning
Four Knights, Scotch Variation: Wins a Piece
White wins in 9 moves with a decisive material gain. (Openheim - NN, 1921.??.??)
The moves
| 1. | e4 | e5 |
| 2. | Nf3 | Nc6 |
| 3. | Nc3 | Nf6 |
| 4. | d4 | exd4 |
| 5. | Nxd4 | d5 |
| 6. | Bb5 | Qd6 |
| 7. | exd5 | Nxd5 |
| 8. | Nxd5 | Qxd5 |
| 9. | Nxc6 |
How the Four Knights, Scotch Variation: Wins a Piece works
The Four Knights, Scotch Variation: Wins a Piece is a classic chess opening trap arising from the Four Knights, Scotch Variation. In this line White wins decisive material by move 9, punishing a natural-looking but losing idea from Black.
The full sequence runs 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 d5 6.Bb5 Qd6 7.exd5 Nxd5 8.Nxd5 Qxd5 9.Nxc6. 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 (Openheim - NN, 1921.??.??). Recognising it early lets you either spring it as White or sidestep it as Black.
Practice this trap move-by-move
Open the Four Knights, Scotch Variation: Wins a Piece 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.