Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Exchange_Variation
Moves: 1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Nf6 5. Nc3 c6 6. Nf3 Bd6 7. Bg5 O-O 8. Be2
Nbd7 9. cxd5 cxd5 10. Nxd5 Qa5+ 11. Nc3 Ne4 12. Bd2 Nxd2 13. Qxd2 Nf6 14. Ne4
Bb4 15. Nc3 Nd5 16. Rc1 Be6 17. a3 Nxc3 *
Position (FEN): r4rk1/pp3ppp/4b3/q7/1b1P4/P1n2N2/1P1QBPPP/2R1K2R w K - 0 18
White to move.
Themes:  Middlegame  
Puzzle rating: 1628
Best move: axb4