Chess puzzle (Advantage)
Opening: Four_Knights_Game, Four_Knights_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Bb4 5. Ng5 d5 6. Bxd5 *
Position (FEN): r1bqk2r/ppp2ppp/2n2n2/3Bp1N1/1b2P3/2N5/PPPP1PPP/R1BQK2R b KQkq - 0 6
Black to move.
Themes:  Opening  
Puzzle rating: 1617
Best move: Nxd5