| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 276. A Hoffman vs R Mascarinas |
| 1-0 | 42 | 1994 | ARG-World | B22 Sicilian, Alapin |
| 277. R Mascarinas vs M J Tempone |
| 1-0 | 39 | 1994 | ARG-World | E11 Bogo-Indian Defense |
| 278. R Casafus vs R Mascarinas |
| ½-½ | 82 | 1994 | ARG-World | A07 King's Indian Attack |
| 279. R Mascarinas vs D H Campora |
| 0-1 | 44 | 1994 | ARG-World | D35 Queen's Gambit Declined |
| 280. R Mascarinas vs G Soppe |
| 1-0 | 56 | 1994 | ARG-World | D15 Queen's Gambit Declined Slav |
| 281. A Sorin vs R Mascarinas |
| ½-½ | 40 | 1994 | ARG-World | E10 Queen's Pawn Game |
| 282. Panno vs R Mascarinas |
| 1-0 | 37 | 1994 | ARG-World | A25 English |
| 283. R Mascarinas vs H Spangenberg |
| ½-½ | 63 | 1994 | ARG-World | D27 Queen's Gambit Accepted, Classical |
| 284. R Mascarinas vs E Scarella |
| 1-0 | 72 | 1994 | ARG-World | B31 Sicilian, Rossolimo Variation |
| 285. S Johanis vs R Mascarinas |
| 1-0 | 45 | 2000 | Japfa op | A16 English |
| 286. R Mascarinas vs R Bitoon |
| ½-½ | 10 | 2000 | Quezon City Equitable Card | A47 Queen's Indian |
| 287. R Mascarinas vs J C Fernandez |
| 1-0 | 37 | 2001 | 29th World Open | A80 Dutch |
| 288. F Doettling vs R Mascarinas |
| 1-0 | 36 | 2001 | 29th World Open | A46 Queen's Pawn Game |
| 289. S Shchukin vs R Mascarinas |
 | 0-1 | 45 | 2001 | 29th World Open | B21 Sicilian, 2.f4 and 2.d4 |
Kibitzing
