Final position — Black is winning
Double Attack
Black wins in 11 moves with a decisive material gain. (50 Opening Traps,Part 1 - Double Attack - D02 - https://lichess.org/@/CHESSLUCAFD)
The moves
| 1. | d4 | d5 |
| 2. | Nf3 | Nf6 |
| 3. | c4 | e6 |
| 4. | g3 | Bb4+ |
| 5. | Bd2 | Be7 |
| 6. | Qb3 | O-O |
| 7. | Bg2 | c6 |
| 8. | Bb4 | dxc4 |
| 9. | Qxc4 | Qd5 |
| 10. | Qc3 | Ne4 |
| 11. | Qa3 | Qc4 |
How the Double Attack works
The Double Attack is a classic chess opening trap arising from the Queen's pawn game. In this line Black wins decisive material by move 11, punishing a natural-looking but losing idea from White.
The full sequence runs 1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.g3 Bb4+ 5.Bd2 Be7 6.Qb3 O-O 7.Bg2 c6 8.Bb4 dxc4 9.Qxc4 Qd5 10.Qc3 Ne4 11.Qa3 Qc4. 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 - Double Attack - D02 - 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 Double Attack 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.