| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. M Larrea vs Gustavo Garello |
| 0-1 | 40 |
1997 |
URU-ch | A80 Dutch |
| 2. J Escofet vs M Larrea |
| ½-½ | 30 |
2001 |
ch-URU | A05 Reti Opening |
| 3. G Curi vs M Larrea |
| 1-0 | 39 |
2001 |
ch-URU | B89 Sicilian |
| 4. M Larrea vs D Izquierdo |
| 0-1 | 29 |
2001 |
ch-URU | C50 Giuoco Piano |
| 5. M Larrea vs M Nunez |
| 1-0 | 17 |
2001 |
URU-ch XIV prel del Interior | C00 French Defense |
| 6. M Larrea vs B Roselli Mailhe |
| 0-1 | 42 |
2001 |
ch-URU | E86 King's Indian, Samisch, Orthodox, 7.Nge2 c6 |
| 7. A Bauza vs M Larrea |
| 1-0 | 25 |
2001 |
ch-URU | B22 Sicilian, Alapin |
| 8. M Larrea vs Nicolas Ulaneo |
| 1-0 | 22 |
2001 |
Semana Santa op | B40 Sicilian |
| 9. S Granara Barreto vs M Larrea |
| 0-1 | 65 |
2001 |
ch-URU | A48 King's Indian |
| 10. M Larrea vs R Muniz |
| 0-1 | 44 |
2001 |
ch-URU | B40 Sicilian |
| 11. M Larrea vs M Crosa |
| 0-1 | 44 |
2001 |
ch-URU | B33 Sicilian |
| 12. J Riverol vs M Larrea |
| ½-½ | 64 |
2001 |
ch-URU | E63 King's Indian, Fianchetto, Panno Variation |
| 13. M Larrea vs Bui Vinh |
| 0-1 | 62 |
2002 |
Bled Olympiad | D31 Queen's Gambit Declined |
| 14. M Larrea vs M Mchedlishvili |
| 0-1 | 30 |
2002 |
Bled Olympiad | B57 Sicilian |
| 15. M Mikac vs M Larrea |
| ½-½ | 77 |
2002 |
Bled Olympiad | A48 King's Indian |
| 16. P Oatlhotse vs M Larrea |
| 1-0 | 53 |
2004 |
36th Olympiad | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 17. M Larrea vs Z Zarul Shazwan |
| 1-0 | 57 |
2004 |
36th Olympiad | A08 King's Indian Attack |
| 18. Van Huy Nguyen vs M Larrea |
| 1-0 | 37 |
2004 |
36th Olympiad | B56 Sicilian |
| 19. M Llorens vs M Larrea |
| 1-0 | 50 |
2004 |
36th Olympiad | B50 Sicilian |
| 20. M Larrea vs C Saavedra |
| ½-½ | 32 |
2004 |
36th Olympiad | B23 Sicilian, Closed |
| 21. Shredder vs M Larrea |
| 1-0 | 25 |
2004 |
ITT Copa CMSalud | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 22. M Larrea vs P Klerides |
| ½-½ | 34 |
2004 |
36th Olympiad | E92 King's Indian |
| 23. M Larrea vs J Hellsten |
| 0-1 | 27 |
2005 |
IV Memorial Pereyra Puebla | A28 English |
| 24. Holi Ali Moawia Ahmed vs M Larrea |
| 0-1 | 50 |
2006 |
37th Chess Olympiad | B30 Sicilian |
| 25. I Yarmonov vs M Larrea |
 | 0-1 | 73 |
2006 |
37th Chess Olympiad | E75 King's Indian, Averbakh, Main line |