Chess puzzle (Advantage)
Moves: 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bg5 f6 6. Bd2 Ne7 7. Bd3 Bf5 8.
Bxf5 Nxf5 9. O-O O-O 10. Nc3 c6 11. Ne2 Na6 12. a3 Nc7 13. c3 Qd7 14. Qb3 Ne6
15. Rfe1 Rab8 16. Qa4 a6 17. b3 Qc8 18. c4 b5 19. cxb5 axb5 20. Qa5 Ra8 21. Qc3
Bxa3 *
Position (FEN): r1q2rk1/6pp/2p1np2/1p1p1n2/3P4/bPQ2N2/3BNPPP/R3R1K1 w - - 0 22
White to move.
Themes: Defensive Move Middlegame  
Puzzle rating: 1709
Best move: b4