Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Orthoschnapp_Gambit
Moves: 1. e4 e6 2. c4 d5 3. cxd5 exd5 4. Qb3 Be6 5. Qxb7 Nd7 6. d3 dxe4 7. Qxe4 Ngf6
8. Qh4 Be7 9. Bg5 c5 10. Nf3 Qa5+ 11. Nc3 Rb8 12. Qa4 Qc7 13. Bf4 Bd6 14. Bxd6
Qxd6 15. Nb5 *
Position (FEN): 1r2k2r/p2n1ppp/3qbn2/1Np5/Q7/3P1N2/PP3PPP/R3KB1R b KQk - 1 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 2278
Best move: Qb6