| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Lasker vs R Illa |
  | 0-1 | 47 | 1910 | Simul, 31b | C82 Ruy Lopez, Open |
| 2. Lasker vs R Illa |
| 1-0 | 25 | 1910 | Buenos Aires | C84 Ruy Lopez, Closed |
| 3. R Illa vs Lasker |
| ½-½ | 48 | 1910 | Buenos Aires | C66 Ruy Lopez |
| 4. Capablanca vs R Illa |
| 1-0 | 27 | 1911 | Exhibition game | D00 Queen's Pawn Game |
| 5. R Illa vs Capablanca |
| 0-1 | 68 | 1911 | Exhibition game | C12 French, McCutcheon |
| 6. Capablanca vs R Illa |
| 1-0 | 36 | 1911 | Exhibition game | C77 Ruy Lopez |
| 7. Capablanca vs R Illa |
| 1-0 | 23 | 1911 | Simul, 40b | D00 Queen's Pawn Game |
| 8. Kostic vs R Illa |
| 1-0 | 45 | 1913 | Kostic-Illa Match | C79 Ruy Lopez, Steinitz Defense Deferred |
| 9. Kostic vs R Illa |
| 1-0 | 49 | 1913 | Kostic-Illa Match | C44 King's Pawn Game |
| 10. R Illa vs Capablanca |
| 0-1 | 26 | 1914 | Buenos Aires exh | D37 Queen's Gambit Declined |
| 11. A A Barbosa de Oliveira vs R Illa |
| 1-0 | 25 | 1915 | ARG-ch San Luis | C29 Vienna Gambit |
| 12. L Palau vs R Illa |
| 1-0 | 38 | 1921 | ARG-ch1 | D63 Queen's Gambit Declined, Orthodox Defense |
| 13. R Illa vs R Grau |
| ½-½ | 32 | 1921 | ARG-ch1 | C66 Ruy Lopez |
| 14. R Illa vs A A Barbosa de Oliveira |
| 1-0 | 51 | 1921 | 1st South American Championship 1921/22 | C83 Ruy Lopez, Open |
| 15. J Berasain vs R Illa |
| 0-1 | 22 | 1921 | 1st South American Championship 1921/22 | C56 Two Knights |
| 16. R Illa vs L Palau |
| 1-0 | 33 | 1921 | 1st South American Championship 1921/22 | C10 French |
| 17. R Grau vs R Illa |
| ½-½ | 17 | 1921 | 1st South American Championship 1921/22 | D12 Queen's Gambit Declined Slav |
| 18. R Illa vs J de Freitas |
| 1-0 | 35 | 1922 | 1st South American Championship 1921/22 | D00 Queen's Pawn Game |
| 19. J Loedel vs R Illa |
| 0-1 | 8 | 1922 | 1st South American Championship 1921/22 | C20 King's Pawn Game |
| 20. R Illa vs R Werneck de Castro |
| ½-½ | 25 | 1922 | 1st South American Championship 1921/22 | D63 Queen's Gambit Declined, Orthodox Defense |
| 21. S Rivas Costa vs R Illa |
| ½-½ | 31 | 1922 | 1st South American Championship 1921/22 | D12 Queen's Gambit Declined Slav |
| 22. R Illa vs J Lynch |
| 1-0 | 65 | 1922 | 1st South American Championship 1921/22 | D63 Queen's Gambit Declined, Orthodox Defense |
| 23. B H Villegas vs R Illa |
| 1-0 | 71 | 1922 | 1st South American Championship 1921/22 | E16 Queen's Indian |
| 24. R Illa vs A Ellerman |
| ½-½ | 30 | 1922 | 1st South American Championship 1921/22 | D63 Queen's Gambit Declined, Orthodox Defense |
| 25. D Reca vs R Illa |
| 0-1 | 42 | 1922 | 1st South American Championship 1921/22 | D64 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
Kibitzing
