Chess puzzle (Advantage)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Advance_Variation
Moves: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Bd3 Bxd3 6. Qxd3 c5 7. c4 dxc4 8. Qxc4
Nc6 9. Be3 cxd4 10. Nxd4 Nxd4 11. Bxd4 Ne7 12. Nc3 Nc6 13. Rd1 Qa5 14. f4 Be7
15. Qb5 Qxb5 16. Nxb5 O-O 17. O-O a6 18. Nc3 *
Position (FEN): r4rk1/1p2bppp/p1n1p3/4P3/3B1P2/2N5/PP4PP/3R1RK1 b - - 1 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1122
Best move: Nxd4