The Elephant Trap

A QGD trap where grabbing the queen wins a piece instead.

Queen's Gambit Declined

Key Positions

Normal QGD position — but after cxd5 a trap lurks

After 5.cxd5 Nxd5: if 6.Nxd5?? Qxd5 is fine, but 6.e4?? walks into it

The trap sprung: after ...Bb4! pinning Nc3, Black wins material

e4?? This natural-looking move walks into the trap — the knight on d5 takes on e4!
After ...Nxe4, if Nxe4 then ...Bb4+ wins the knight back, or if dxe5 then ...Bb4 pins and wins the Nc3.
The refutation: after ...Nxd5, play 6.e3 or 6.Bd3 developing calmly, NOT the aggressive 6.e4.
e3 Safe: develop the bishop before pushing e4, avoiding the trap entirely.

...Nxd5 Recapture on d5 with the knight, setting the stage for the trap.
...Nxe4! After White's premature e4, grab the pawn with the f6 knight.
...Bb4! The key move: pin the c3 knight. If White takes the e4 knight, ...Bxc3+ wins.
Black ends up winning a piece in all main variations of the trap.

The Elephant Trap punishes premature central expansion. In the QGD, e4 must be prepared carefully — rushing it can walk into tactical disasters.

Question 1 of 3

What makes the Elephant Trap work?