Chess puzzle (Advantage)
Moves: 1. d4 Nf6 2. Nf3 d6 3. c4 g6 4. Nc3 Bg7 5. Bf4 O-O 6. e3 c5 7. d5 e5 8. Bg5 Qc7
9. e4 Qa5 10. Bd2 Nh5 11. h3 f5 12. Bd3 a6 13. a3 Qc7 14. Qc2 f4 15. Be2 Qe7
16. O-O-O Bd7 17. Rdg1 b5 18. cxb5 axb5 19. Nxb5 Na6 20. Kb1 Rfb8 21. Nc3 Nc7
22. Bc1 *
Position (FEN): rr4k1/2nbq1bp/3p2p1/2pPp2n/4Pp2/P1N2N1P/1PQ1BPP1/1KB3RR b - - 6 22
Black to move.
Themes: Pin Middlegame  
Puzzle rating: 1590
Best move: Rxa3