Chess puzzle (Advantage)
Opening: Kings_Pawn_Game, Kings_Pawn_Game_Napoleon_Attack
Moves: 1. e4 e5 2. Qf3 d6 3. Bc4 Nf6 4. h3 Be7 5. g4 Nc6 6. g5 *
Position (FEN): r1bqk2r/ppp1bppp/2np1n2/4p1P1/2B1P3/5Q1P/PPPP1P2/RNB1K1NR b KQkq - 0 6
Black to move.
Themes:  Opening  
Puzzle rating: 1021
Best move: Nd4