| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Lappage vs N Mantzouneas |
| 1-0 | 24 | 2000 | Biel MTO Open | B23 Sicilian, Closed |
| 27. N Mantzouneas vs M Leutwyler |
| 0-1 | 36 | 2000 | Biel MTO Open | E11 Bogo-Indian Defense |
| 28. N Mantzouneas vs G Cohrs |
| 0-1 | 51 | 2000 | Biel MTO Open | E60 King's Indian Defense |
| 29. H Suri vs N Mantzouneas |
| 1-0 | 34 | 2000 | Biel MTO Open | B56 Sicilian |
| 30. N Mantzouneas vs H Kleinhenz |
| ½-½ | 23 | 2000 | Biel MTO Open | E11 Bogo-Indian Defense |
| 31. M Ramos Santana vs N Mantzouneas |
| 0-1 | 72 | 2000 | Biel MTO Open | B23 Sicilian, Closed |
| 32. N Mantzouneas vs M Tillmann |
| 0-1 | 49 | 2000 | Biel MTO Open | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 33. Mikhalevski vs N Mantzouneas |
| 1-0 | 29 | 2000 | Bad Wiessee Open | D30 Queen's Gambit Declined |
| 34. C Braun vs N Mantzouneas |
| ½-½ | 41 | 2000 | Bad Wiessee Open | D45 Queen's Gambit Declined Semi-Slav |
| 35. A Kaminik vs N Mantzouneas |
| 1-0 | 32 | 2000 | Bad Wiessee Open | D46 Queen's Gambit Declined Semi-Slav |
| 36. N Mantzouneas vs G Fahnenschmidt |
| ½-½ | 39 | 2000 | Bad Wiessee Open | D02 Queen's Pawn Game |
| 37. N Mantzouneas vs M Roeder |
| 0-1 | 54 | 2001 | Bad Woerishofen Open | E15 Queen's Indian |
| 38. N Mantzouneas vs F Antognini |
| 1-0 | 44 | 2001 | Biel MTO Open | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
| 39. N Mantzouneas vs K Hoennekes |
| 1-0 | 26 | 2006 | Bad Woerishofen Open | A85 Dutch, with c4 & Nc3 |
| 40. N Mantzouneas vs H Neese |
| 0-1 | 45 | 2006 | Bad Woerishofen Seniors Open-A | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 41. Luca Spinedi vs N Mantzouneas |
| 1-0 | 20 | 2007 | Biel MTO Open | D05 Queen's Pawn Game |
Kibitzing
