1.Bxd4exd4
2.Qa5!
Tarrasch said if one piece stands badly, the entire game is bad. Black's Na6 is poorly placed, and he has to waste a tempo protecting it
2...Nc7
3.Qf5
Black now can only prevent mate by 3... g6, but that leaves his Bf6 unprotected, so:
3...1-0
Henkin-Lebedev (1961)