Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Bc4 h6 4. c3 c5 5. O-O Be7 6. Qa4+ Bd7 7. Bb5 Nc6 8. d4
exd4 9. cxd4 cxd4 10. Nxd4 Nxd4 11. Bxd7+ Qxd7 12. Qxd7+ *
Position (FEN): r3k1nr/pp1Qbpp1/3p3p/8/3nP3/8/PP3PPP/RNB2RK1 b kq - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 894
Best move: Kxd7