Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Exchange_Variation
Moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 e6 5. e3 Nf6 6. Nf3 Bd6 7. Bd3 O-O 8. Nb5
Bb4+ 9. Bd2 Be7 10. Ne5 a6 11. Nc3 Nbd7 12. Nf3 b5 13. Nxb5 *
Position (FEN): r1bq1rk1/3nbppp/p3pn2/1N1p4/3P4/3BPN2/PP1B1PPP/R2QK2R b KQ - 0 13
Black to move.
Themes:  Opening  
Puzzle rating: 1072
Best move: axb5