What is the best continuation for White?

ICC tourney 1300 (12 3), Internet Chess Club
Analysis of yoshi (1743) vs. Demachaeron (1494)

8 7 6 5 4 3 2 1 a b c d e f g h 0

(white to move) 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Be7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. O-O Bb7 10. e4 c5 11. dxc5 Bxc5 12. e5 Nd5 13. a4 b4 14. Ne4 Be7 15. Bg5 f6 16. exf6 Bxf6 17. Re1 O-O 18. Nc5 Bc8 19. Nxe6 Bxe6 20. Rxe6 Kh8 21. Be4 Bxg5 22. Qxd5 Qxd5 23. Bxd5 Ra7 24. Nxg5

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