Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Steinitz_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. Bxc6+ bxc6 5. O-O Ba6 6. Re1 Nf6 7. Nc3 Be7 8.
d4 exd4 9. Qxd4 c5 *
Position (FEN): r2qk2r/p1p1bppp/b2p1n2/2p5/3QP3/2N2N2/PPP2PPP/R1B1R1K1 w kq - 0 10
White to move.
Themes:  Opening  
Puzzle rating: 1086
Best move: Qa4+