| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. M Arnold vs Zhe Quan |
| 1-0 | 47 |
2001 |
NCC | B14 Caro-Kann, Panov-Botvinnik Attack |
| 2. M Arnold vs R Goletiani |
| 0-1 | 39 |
2004 |
32nd World Open | E00 Queen's Pawn Game |
| 3. M Arnold vs Le Quang Liem |
 | 0-1 | 38 |
2005 |
BELFORT YWCC BU14 | D10 Queen's Gambit Declined Slav |
| 4. S Reader vs M Arnold |
 | 0-1 | 50 |
2005 |
SuperNationals | D32 Queen's Gambit Declined, Tarrasch |
| 5. M Arnold vs S Muhammad |
| ½-½ | 41 |
2006 |
34th World Open | A84 Dutch |
| 6. J Bonin vs M Arnold |
| 0-1 | 36 |
2006 |
34th World Open | A15 English |
| 7. M Zlotnikov vs M Arnold |
| ½-½ | 22 |
2006 |
34th World Open | A34 English, Symmetrical |
| 8. M Arnold vs M Scekic |
| ½-½ | 92 |
2006 |
34th World Open | A44 Old Benoni Defense |
| 9. P Coupet vs M Arnold |
| 0-1 | 53 |
2006 |
34th World Open | B22 Sicilian, Alapin |
| 10. P Vavrak vs M Arnold |
| 1-0 | 37 |
2007 |
Foxwoods Open | A15 English |
| 11. M Arnold vs B G Smith |
| 0-1 | 45 |
2007 |
World Open | D07 Queen's Gambit Declined, Chigorin Defense |
| 12. M Arnold vs Fedorowicz |
| ½-½ | 10 |
2007 |
World Open | A56 Benoni Defense |
| 13. M Arnold vs D Rensch |
| ½-½ | 44 |
2007 |
Foxwoods Open | E41 Nimzo-Indian |
| 14. C Tanaka vs M Arnold |
| 0-1 | 31 |
2007 |
World Open | A57 Benko Gambit |
| 15. Shabalov vs M Arnold |
| ½-½ | 45 |
2007 |
World Open | B86 Sicilian, Fischer-Sozin Attack |
| 16. S Bercys vs M Arnold |
| 1-0 | 32 |
2007 |
Foxwoods Open | E15 Queen's Indian |
| 17. J Friedel vs M Arnold |
| 1-0 | 36 |
2007 |
World Open | B93 Sicilian, Najdorf, 6.f4 |
| 18. M Arnold vs E Perelshteyn |
| ½-½ | 44 |
2007 |
World Open | E62 King's Indian, Fianchetto |
| 19. M Arnold vs B Coraretti |
| 1-0 | 41 |
2007 |
World Open | D27 Queen's Gambit Accepted, Classical |
| 20. E Fleischman vs M Arnold |
| ½-½ | 13 |
2007 |
Foxwoods Open | A45 Queen's Pawn Game |
| 21. B Abramovic vs M Arnold |
| 1-0 | 44 |
2007 |
World Open | E15 Queen's Indian |
| 22. B Reichstein vs M Arnold |
| 0-1 | 62 |
2008 |
World Open | B54 Sicilian |
| 23. K Kuderinov vs M Arnold |
 | 1-0 | 18 |
2008 |
World Open | B90 Sicilian, Najdorf |
| 24. M Arnold vs E Urquhart |
| ½-½ | 42 |
2008 |
World Open | D44 Queen's Gambit Declined Semi-Slav |
| 25. M Arnold vs A Ramirez |
| 0-1 | 57 |
2008 |
World Open | D15 Queen's Gambit Declined Slav |