Final position — White is winning
Queen's Gambit Declined Slav Defence: Wins a Piece
White wins in 9 moves with a decisive material gain. (Mantia - Baird, Dayton 1987)
The moves
| 1. | d4 | d5 |
| 2. | c4 | c6 |
| 3. | Nc3 | e5 |
| 4. | dxe5 | d4 |
| 5. | Ne4 | Bb4+ |
| 6. | Bd2 | Bxd2+ |
| 7. | Qxd2 | Bf5 |
| 8. | Nd6+ | Kf8 |
| 9. | Nxf5 |
How the Queen's Gambit Declined Slav Defence: Wins a Piece works
The Queen's Gambit Declined Slav Defence: Wins a Piece is a classic chess opening trap arising from the Queen's Gambit Declined Slav defence. In this line White wins decisive material by move 9, punishing a natural-looking but losing idea from Black.
The full sequence runs 1.d4 d5 2.c4 c6 3.Nc3 e5 4.dxe5 d4 5.Ne4 Bb4+ 6.Bd2 Bxd2+ 7.Qxd2 Bf5 8.Nd6+ Kf8 9.Nxf5. 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 (Mantia - Baird, Dayton 1987). Recognising it early lets you either spring it as White or sidestep it as Black.
Practice this trap move-by-move
Open the Queen's Gambit Declined Slav Defence: 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.