| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. M Larrea vs Gustavo Garello |
| 0-1 | 40 |
1997 |
URU-ch | A80 Dutch |
| 2. G Curi vs M Larrea |
| 1-0 | 39 |
2001 |
ch-URU | B89 Sicilian |
| 3. M Larrea vs B Roselli Mailhe |
| 0-1 | 42 |
2001 |
ch-URU | E86 King's Indian, Samisch, Orthodox, 7.Nge2 c6 |
| 4. M Larrea vs M Crosa |
| 0-1 | 44 |
2001 |
ch-URU | B33 Sicilian |
| 5. M Larrea vs D Izquierdo |
| 0-1 | 29 |
2001 |
ch-URU | C50 Giuoco Piano |
| 6. M Larrea vs R Muniz |
| 0-1 | 44 |
2001 |
ch-URU | B40 Sicilian |
| 7. A Bauza vs M Larrea |
| 1-0 | 25 |
2001 |
ch-URU | B22 Sicilian, Alapin |
| 8. M Larrea vs M Mchedlishvili |
| 0-1 | 30 |
2002 |
Bled Olympiad | B57 Sicilian |
| 9. M Larrea vs Bui Vinh |
| 0-1 | 62 |
2002 |
Bled Olympiad | D31 Queen's Gambit Declined |
| 10. Van Huy Nguyen vs M Larrea |
| 1-0 | 37 |
2004 |
36th Olympiad | B56 Sicilian |
| 11. M Llorens vs M Larrea |
| 1-0 | 50 |
2004 |
36th Olympiad | B50 Sicilian |
| 12. Shredder vs M Larrea |
| 1-0 | 25 |
2004 |
ITT Copa CMSalud | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 13. P Oatlhotse vs M Larrea |
| 1-0 | 53 |
2004 |
36th Olympiad | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 14. M Larrea vs J Hellsten |
| 0-1 | 27 |
2005 |
IV Memorial Pereyra Puebla | A28 English |
| 15. M Larrea vs Leitao |
| 0-1 | 31 |
2006 |
37th Chess Olympiad | B23 Sicilian, Closed |
| 16. M Larrea vs F Peralta |
| 0-1 | 27 |
2008 |
2008 Olympiad | B09 Pirc, Austrian Attack |
| 17. M Larrea vs A Guerrero |
| 0-1 | 45 |
2008 |
ch-URU | B25 Sicilian, Closed |
| 18. M Larrea vs Y Pelletier |
| 0-1 | 58 |
2008 |
2008 Olympiad | A07 King's Indian Attack |
| 19. A Durante vs M Larrea |
| 1-0 | 44 |
2008 |
ch-URU | B22 Sicilian, Alapin |
| 20. E Hossain vs M Larrea |
| 1-0 | 39 |
2008 |
2008 Olympiad | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 21. P Pazos-Gambarrotti vs M Larrea |
| 1-0 | 52 |
2008 |
2008 Olympiad | E70 King's Indian |
| 22. Jo Cueto vs M Larrea |
| 1-0 | 32 |
2008 |
2008 Olympiad | A45 Queen's Pawn Game |
| 23. G Mahia vs M Larrea |
| 1-0 | 55 |
2009 |
Olympiad Mercosur | E83 King's Indian, Samisch |
| 24. A Diamant vs M Larrea |
| 1-0 | 53 |
2009 |
Olympiad Mercosur | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
