Bamburgh Gambit

The Bamburgh Gambit features a Queen Sacrifice in exchange for a mating attack.

1. e4, e5
2. Bc4, Nf6
3. Ne2, Nc6
4. d4 ....

White's reply whether or not Black's Knight takes the e4 pawn.  If 3.....Nxe4, then 4. d4 exd4, 5. Qxd4 Nf6, 6. Bg5 Be7, 7. 0-0 White gets a strong center and a possible avenue of attack along the e-file.

4. .... Nxe4
5. dxe5, Nxf2

 6. 0-0 !! ....

 Rightly so.  If 6. Kxf2 Qh4+, 7. Kf1 Qxc4 the position favors Black.

6. .... Nxd1
7. Bxf7+, Ke7
8. Bg5 mate.