Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Steiner_Variation
Moves: 1. e4 e6 2. c4 Nc6 3. d4 d5 4. cxd5 exd5 5. e5 Bb4+ 6. Nc3 Qh4 7. Nf3 Qe4+ 8.
Be3 Bg4 9. Bb5 Bxf3 10. gxf3 Bxc3+ 11. bxc3 Qf5 12. Rg1 h6 13. Rxg7 Ne7 14. Rg1
O-O-O 15. Ke2 Qh5 16. Bf4 a6 17. Qa4 *
Position (FEN): 2kr3r/1pp1np2/p1n4p/1B1pP2q/Q2P1B2/2P2P2/P3KP1P/R5R1 b - - 1 17
Black to move.
Themes:  Middlegame  
Puzzle rating: 1534
Best move: axb5