Chess puzzle (Advantage)
Opening: Benko_Gambit_Declined, Benko_Gambit_Declined_Main_Line
Moves: 1. d4 c5 2. d5 Nf6 3. c4 b5 4. Nf3 g6 5. a3 Bg7 6. Nc3 bxc4 7. e4 d6 8. Bxc4
Ba6 9. Bxa6 Nxa6 10. O-O Nc7 11. Bg5 O-O 12. Bxf6 exf6 13. h4 h5 14. Nh2 Rb8
15. Rb1 Qd7 16. f4 f5 17. Nf3 fxe4 18. Nxe4 Bxb2 *
Position (FEN): 1r3rk1/p1nq1p2/3p2p1/2pP3p/4NP1P/P4N2/1b4P1/1R1Q1RK1 w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1640
Best move: Rxb2