| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. M Larrea vs M Nunez |
| 1-0 | 17 |
2001 |
URU-ch XIV prel del Interior | C00 French Defense |
| 2. M Larrea vs Nicolas Ulaneo |
| 1-0 | 22 |
2001 |
Semana Santa op | B40 Sicilian |
| 3. G Curi vs M Larrea |
| 1-0 | 39 |
2001 |
ch-URU | B89 Sicilian |
| 4. A Bauza vs M Larrea |
| 1-0 | 25 |
2001 |
ch-URU | B22 Sicilian, Alapin |
| 5. Van Huy Nguyen vs M Larrea |
| 1-0 | 37 |
2004 |
36th Olympiad | B56 Sicilian |
| 6. M Larrea vs Z Zarul Shazwan |
| 1-0 | 57 |
2004 |
36th Olympiad | A08 King's Indian Attack |
| 7. M Llorens vs M Larrea |
| 1-0 | 50 |
2004 |
36th Olympiad | B50 Sicilian |
| 8. Shredder vs M Larrea |
| 1-0 | 25 |
2004 |
ITT Copa CMSalud | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 9. P Oatlhotse vs M Larrea |
| 1-0 | 53 |
2004 |
36th Olympiad | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 10. M Larrea vs J Cueto |
| 1-0 | 35 |
2006 |
37th Chess Olympiad | C41 Philidor Defense |
| 11. M Larrea vs O Aikhoje |
| 1-0 | 65 |
2006 |
37th Chess Olympiad | B03 Alekhine's Defense |
| 12. M Larrea vs Sa Rodriguez |
| 1-0 | 33 |
2008 |
ch-URU | B01 Scandinavian |
| 13. Jo Cueto vs M Larrea |
| 1-0 | 32 |
2008 |
2008 Olympiad | A45 Queen's Pawn Game |
| 14. M Larrea vs M Arcos Facio |
| 1-0 | 39 |
2008 |
ch-URU | C50 Giuoco Piano |
| 15. E Hossain vs M Larrea |
| 1-0 | 39 |
2008 |
2008 Olympiad | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 16. A Durante vs M Larrea |
| 1-0 | 44 |
2008 |
ch-URU | B22 Sicilian, Alapin |
| 17. M Larrea vs S Fancy |
| 1-0 | 23 |
2008 |
2008 Olympiad | C41 Philidor Defense |
| 18. P Pazos-Gambarrotti vs M Larrea |
| 1-0 | 52 |
2008 |
2008 Olympiad | E70 King's Indian |
| 19. M Larrea vs K Sebih |
| 1-0 | 82 |
2008 |
2008 Olympiad | C55 Two Knights Defense |
| 20. A Diamant vs M Larrea |
| 1-0 | 53 |
2009 |
Olympiad Mercosur | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 21. G Mahia vs M Larrea |
| 1-0 | 55 |
2009 |
Olympiad Mercosur | E83 King's Indian, Samisch |