Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 e6 3. f4 d5 4. Bb5+ Nc6 5. d3 a6 6. Bxc6+ bxc6 7. Nf3 Ne7 8.
O-O Ng6 9. f5 exf5 10. exf5 Bxf5 11. Re1+ Be7 12. Ne5 Nxe5 13. Rxe5 Bg6 14. Qe2
Ra7 15. Bd2 O-O 16. Re1 Re8 17. Na4 f6 18. Re6 Rc7 *
Position (FEN): 3qr1k1/2r1b1pp/p1p1Rpb1/2pp4/N7/3P4/PPPBQ1PP/4R1K1 w - - 2 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1870
Best move: Ba5