Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Accelerated_Move_Order
Moves: 1. d4 d5 2. c4 c6 3. Nc3 e6 4. Bf4 c5 5. e3 cxd4 6. exd4 Nc6 7. Nf3 Bd6 8. Bg3
Bxg3 9. hxg3 Nge7 10. Be2 Nf5 11. O-O Qb6 12. b3 Ncxd4 13. Nxd4 Qxd4 14. Nb5
Qb6 15. cxd5 a6 16. dxe6 *
Position (FEN): r1b1k2r/1p3ppp/pq2P3/1N3n2/8/1P4P1/P3BPP1/R2Q1RK1 b kq - 0 16
Black to move.
Themes:  Middlegame  
Puzzle rating: 2189
Best move: axb5