Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Exchange_Variation
Moves: 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bb5+ c6 5. Bd3 Bd6 6. Bd2 Nf6 7. Qe2+ Be6 8.
Nc3 O-O 9. O-O-O Qb6 10. Nf3 c5 11. Be3 Nc6 12. Bb5 cxd4 13. Nxd4 Nxd4 14. Rxd4
Qa5 15. Ra4 Qd8 16. Rd1 a6 17. Bd3 b5 18. Nxb5 *
Position (FEN): r2q1rk1/5ppp/p2bbn2/1N1p4/R7/3BB3/PPP1QPPP/2KR4 b - - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1171
Best move: axb5