Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 d5 2. g3 Bf5 3. Bg2 Qd7 4. Nf3 Nc6 5. a3 O-O-O 6. O-O f6 7. Bf4 e5 8.
dxe5 fxe5 9. Nxe5 Nxe5 10. Bxe5 Nf6 11. Bxf6 gxf6 12. Nc3 d4 13. Nd5 Bg7 14.
Qxd4 c6 15. Nb6+ *
Position (FEN): 2kr3r/pp1q2bp/1Np2p2/5b2/3Q4/P5P1/1PP1PPBP/R4RK1 b - - 1 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 946
Best move: axb6