Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Stafford_Gambit
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. e5 Ne4 6. d4 Be6 7. Bd3 *
Position (FEN): r2qkb1r/ppp2ppp/2p1b3/4P3/3Pn3/3B4/PPP2PPP/RNBQK2R b KQkq - 2 7
Black to move.
Themes:  Opening  
Puzzle rating: 1981
Best move: Qxd4