Chess puzzle (Advantage)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Bc5 5. h3 h6 6. d3 d6 7. a3 O-O 8. O-O a5
9. Na4 Ba7 10. Qe2 Bd7 11. Nc3 Nd4 12. Nxd4 Bxd4 13. Be3 Bxe3 14. Qxe3 Rb8 15.
f4 exf4 16. Qxf4 b5 17. Ba2 b4 18. axb4 axb4 19. Nd5 Nxd5 20. Bxd5 Be6 21. Bxe6
fxe6 22. b3 *
Position (FEN): 1r1q1rk1/2p3p1/3pp2p/8/1p2PQ2/1P1P3P/2P3P1/R4RK1 b - - 0 22
Black to move.
Themes:  Endgame  
Puzzle rating: 829
Best move: Rxf4