| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. R Illa vs H Anaya Oger |
| 1-0 | 48 | 1922 | 1st South American Championship 1921/22 | C14 French, Classical |
| 27. J Montalban vs R Illa |
| 0-1 | 28 | 1922 | 1st South American Championship 1921/22 | A84 Dutch |
| 28. L Palau vs R Illa |
| 1-0 | 32 | 1923 | ARG-ch3 Mayor Buenos Aires | D55 Queen's Gambit Declined |
| 29. R Illa vs Reti |
| 0-1 | 37 | 1924 | 3rd Argentine National Tournament | C11 French |
| 30. R Illa vs R Grau |
| 0-1 | 30 | 1924 | 3rd Argentine National Tournament | D00 Queen's Pawn Game |
| 31. R Grau vs R Illa |
| 1-0 | 36 | 1924 | 3rd Argentine National Tournament | D26 Queen's Gambit Accepted |
| 32. Reti vs R Illa |
 | 1-0 | 19 | 1924 | 3rd Argentine National Tournament | C33 King's Gambit Accepted |
| 33. V Fernandez Coria vs R Illa |
| 0-1 | 43 | 1924 | 3rd Argentine National Tournament | D62 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 34. R Illa vs R De Witt |
| ½-½ | 36 | 1924 | 3rd Argentine National Tournament | D85 Grunfeld |
| 35. R Illa vs A Guerra Boneo |
| 1-0 | 38 | 1924 | 3rd Argentine National Tournament | D00 Queen's Pawn Game |
| 36. R Illa vs L Palau |
| 1-0 | 37 | 1924 | 3rd Argentine National Tournament | C11 French |
| 37. R Illa vs Alekhine |
| 0-1 | 42 | 1926 | Buenos Aires | C78 Ruy Lopez |
| 38. Alekhine vs R Illa |
| 1-0 | 27 | 1926 | Buenos Aires | D46 Queen's Gambit Declined Semi-Slav |
Kibitzing
