Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Bird_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Bc4 g6 5. Nxe5 Qg5 6. Ng4 *
Position (FEN): r1b1kbnr/pppp1p1p/6p1/6q1/2BnP1N1/8/PPPP1PPP/RNBQK2R b KQkq - 2 6
Black to move.
Themes:  Opening  
Puzzle rating: 1930
Best move: d5