Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 e6 5. Nf3 d5 6. e5 f6 7. Bf4 Bb4+ 8. Nc3
Qa5 9. Qc2 Bd7 10. Be2 fxe5 11. Bxe5 Nxe5 12. Nxe5 Nf6 13. O-O Bxc3 14. bxc3
Rc8 15. Rab1 Rxc3 16. Qd1 Ba4 17. Qe1 b6 18. Bf3 O-O 19. Bd1 Bb5 *
Position (FEN): 5rk1/p5pp/1p2pn2/qb1pN3/3P4/2r5/P4PPP/1R1BQRK1 w - - 4 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1160
Best move: Rxb5