Final position — Black is winning
Cambridge springs Trap
Black wins in 10 moves with a decisive material gain. (50 Opening Traps,Part 1 - Cambridge springs Trap - D52 - https://lichess.org/@/CHESSLUCAFD)
The moves
| 1. | d4 | d5 |
| 2. | c4 | e6 |
| 3. | Nc3 | Nf6 |
| 4. | Bg5 | Nbd7 |
| 5. | e3 | c6 |
| 6. | Nf3 | Qa5 |
| 7. | Nd2 | Bb4 |
| 8. | Qc2 | O-O |
| 9. | Bd3 | dxc4 |
| 10. | Bxc4 | Qxg5 |
How the Cambridge springs Trap works
The Cambridge springs Trap is a classic chess opening trap arising from the Queen's Gambit Declined, 4.Bg5. In this line Black wins decisive material by move 10, punishing a natural-looking but losing idea from White.
The full sequence runs 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2 O-O 9.Bd3 dxc4 10.Bxc4 Qxg5. 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 - Cambridge springs Trap - D52 - 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 Cambridge springs Trap 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.