Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be7 8. Be3
O-O 9. Qd2 Be6 10. Nd5 Bxd5 11. exd5 Nbd7 12. O-O-O b5 13. Kb1 Nb6 14. Bxb6
Qxb6 15. Bd3 a5 16. g4 Kh8 17. g5 Nxd5 18. Be4 Nf4 19. h4 g6 *
Position (FEN): r4r1k/4bp1p/1q1p2p1/pp2p1P1/4Bn1P/1N3P2/PPPQ4/1K1R3R w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1337
Best move: Bxa8