Final position — Black is winning
Gruenfeld Defence: Wins a Piece
Black wins in 10 moves with a decisive material gain. (Rundle - Rooswa, Tulsa 1988)
The moves
| 1. | d4 | Nf6 |
| 2. | c4 | g6 |
| 3. | Nc3 | d5 |
| 4. | Bg5 | Ne4 |
| 5. | Nxe4 | dxe4 |
| 6. | g3 | Bg7 |
| 7. | e3 | c5 |
| 8. | Bg2 | cxd4 |
| 9. | Bxe4 | Qa5+ |
| 10. | Qd2 | Qxg5 |
How the Gruenfeld Defence: Wins a Piece works
The Gruenfeld Defence: Wins a Piece is a classic chess opening trap arising from the Gruenfeld Defence. 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 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxe4 6.g3 Bg7 7.e3 c5 8.Bg2 cxd4 9.Bxe4 Qa5+ 10.Qd2 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 (Rundle - Rooswa, Tulsa 1988). Recognising it early lets you either spring it as Black or sidestep it as White.
Practice this trap move-by-move
Open the Gruenfeld 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.