Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nxe5 Nc6 5. Nxf7 Qe7 6. Qe2 *
Position (FEN): r1b1kb1r/ppppqNpp/2n5/8/2B1n3/8/PPPPQPPP/RNB1K2R b KQkq - 2 6
Black to move.
Themes:  Opening  
Puzzle rating: 1469
Best move: Nd4