Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Knight_Variation
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 Qxd5 4. Nc3 Qd8 5. Bc4 Bb4 6. O-O Nf6 7. d4 Bxc3 8.
bxc3 Nbd7 9. Ba3 Nb6 10. Bd3 Nbd5 11. Qe1 Qd7 12. Ne5 Qa4 13. Bc5 b6 14. Bb4 a5
15. c4 *
Position (FEN): r1b1k2r/2p2ppp/1p2pn2/p2nN3/qBPP4/3B4/P1P2PPP/R3QRK1 b kq - 0 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1272
Best move: Nxb4