Chess puzzle (Advantage)
Opening: Benko_Gambit, Benko_Gambit_Other_variations
Moves: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8.
Kxf1 g6 9. g3 Bg7 10. Kg2 Nbd7 11. Nf3 O-O 12. a4 Qa5 13. Bf4 Rfb8 14. Qc2 Qb4
15. Rhb1 Nb6 16. Bd2 Nc4 17. Nb5 Nxd2 18. Nxd2 Nd7 19. Ra2 *
Position (FEN): rr4k1/3nppbp/3p2p1/1NpP4/Pq2P3/6P1/RPQN1PKP/1R6 b - - 2 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1344
Best move: Rxb5