Queen's Gambit Declined, Elephant Trap
In chess, the Elephant Trap is a faulty attempt by White to win a pawn in a popular variation of the Queen's Gambit Declined.
The earliest recorded occurrence of the trap seems to be the game Karl Mayet–Daniel Harrwitz, Berlin 1848.
The trap
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd75. cxd5 exd5 6. Nxd5
6... Nxd5 7. Bxd8 Bb4+
8. Qd2 Bxd2+
'''9. Kxd2 Kxd8'''