Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Exchange_Variation
Moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. g3 Bf5 6. Bg2 e6 7. Nf3 h6 8. O-O
Nc6 9. Re1 Bb4 10. Ne5 Rc8 11. Qa4 Qb6 12. Qb5 *
Position (FEN): 2r1k2r/pp3pp1/1qn1pn1p/1Q1pNb2/1b1P4/2N3P1/PP2PPBP/R1B1R1K1 b k - 9 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1881
Best move: Qxb5