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 Ng4 6. Qe2 *
Position (FEN): r1bqkb1r/ppp2ppp/2p5/4P3/6n1/8/PPPPQPPP/RNB1KB1R b KQkq - 2 6
Black to move.
Themes:  Opening  
Puzzle rating: 1559
Best move: Bc5