| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Timoshchenko vs M Pacheco |
| 1-0 | 47 |
2002 |
Bled ol (Men) | E12 Queen's Indian |
| 2. C McNab vs M Pacheco |
| 1-0 | 60 |
2002 |
Bled Olympiad | A29 English, Four Knights, Kingside Fianchetto |
| 3. M Pacheco vs D Rowe |
| 1-0 | 59 |
2002 |
Bled ol (Men) | E10 Queen's Pawn Game |
| 4. Kanep vs M Pacheco |
| 1-0 | 28 |
2003 |
World Junior Championships | D11 Queen's Gambit Declined Slav |
| 5. R Sadykov vs M Pacheco |
| 1-0 | 28 |
2003 |
World Junior Championships | C18 French, Winawer |
| 6. D Schneider vs M Pacheco |
| 1-0 | 87 |
2003 |
World Junior Championships | C17 French, Winawer, Advance |
| 7. S Barrientos-Chavarriaga vs M Pacheco |
| 1-0 | 78 |
2004 |
36th Olympiad | C01 French, Exchange |
| 8. M Pacheco vs R Khouseinov |
| 1-0 | 58 |
2004 |
36th Olympiad | A53 Old Indian |
| 9. M Bluvshtein vs M Pacheco |
| 1-0 | 49 |
2004 |
36th Olympiad | D17 Queen's Gambit Declined Slav |
| 10. A Corke vs M Pacheco |
| 1-0 | 70 |
2004 |
36th Olympiad | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 11. M Pacheco vs C J Blanco |
| 1-0 | 39 |
2004 |
36th Olympiad | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 12. E Campos vs M Pacheco |
| 1-0 | 35 |
2004 |
36th Olympiad | B40 Sicilian |
| 13. J F Cubas vs M Pacheco |
| 1-0 | 55 |
2004 |
36th Olympiad | B40 Sicilian |
| 14. M Pacheco vs E Vodyasov |
| 1-0 | 52 |
2006 |
37th Chess Olympiad | A84 Dutch |
| 15. K Lie vs M Pacheco |
| 1-0 | 41 |
2006 |
37th Chess Olympiad | C02 French, Advance |
| 16. J Markos vs M Pacheco |
| 1-0 | 37 |
2006 |
37th Chess Olympiad | D15 Queen's Gambit Declined Slav |
| 17. M Pacheco vs D Camarasa |
| 1-0 | 63 |
2006 |
37th Chess Olympiad | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 18. Zhao Zong Yuan vs M Pacheco |
| 1-0 | 42 |
2006 |
37th Chess Olympiad | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
