Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Bc4 e6 3. Nf3 Nc6 4. d3 a6 5. a4 d6 6. O-O Nf6 7. c3 d5 8. exd5
exd5 9. Re1+ Be7 10. Ba2 h6 11. h3 O-O 12. Bf4 g5 13. Be5 g4 14. hxg4 Bxg4 15.
Bf4 h5 16. Nbd2 Bd6 17. Bh6 Re8 18. Qb3 Qc7 19. Bg5 Nh7 20. Qxd5 Be6 21. Qe4 *
Position (FEN): r3r1k1/1pq2p1n/p1nbb3/2p3Bp/P3Q3/2PP1N2/BP1N1PP1/R3R1K1 b - - 2 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1910
Best move: Bxa2