This trap starts out in the Danish Gambit Accepted Line.
1. e4 e5
2. d4 exd4
3. c3 dxc3
4. Bc4 cxb2
White is down two pawns but has a very strong attack lined up at the king side of black. Black can play defense or try to be aggressive. 5…Qg5 is one attempt black can use to keep attacking white. After the light square bishop moved for white, the g2 pawn become vulnerable. That is what black is targeting with 5…Qg5.
White should ignore this threat and set the trap with 6. Nf3. If black takes the bait and captures the pawn on g2 things fall apart quickly.
Watch the video below to see a detailed explanation of this trap.