Queen's Gambit


i have seen this many years ago and keept it for a real game, but never been in position to pull this. I am not sure but i think it is oxford-cembridge variation
1...N:bd7 2. c:d -e:d 3. N:d5-N:d5 4. B:d8- Bb4+ 5.Qd2-B:d2+ and black wins a piece