| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Adams vs I Papaioannou |
 | 1-0 | 33 |
2000 |
34th Olympiad | B14 Caro-Kann, Panov-Botvinnik Attack |
| 27. J Egger vs I Papaioannou |
| 1-0 | 64 |
2000 |
34th Olympiad | B01 Scandinavian |
| 28. I Papaioannou vs Gelfand |
| ½-½ | 22 |
2000 |
Olympiad | B20 Sicilian |
| 29. N Miezis vs I Papaioannou |
| 0-1 | 48 |
2000 |
34th Olympiad | A18 English, Mikenas-Carls |
| 30. I Papaioannou vs A Kveinys |
| ½-½ | 20 |
2000 |
34th Olympiad | A30 English, Symmetrical |
| 31. I Papaioannou vs Jiangchuan |
| 1-0 | 52 |
2000 |
34th Olympiad | B40 Sicilian |
| 32. Shaobin vs I Papaioannou |
| ½-½ | 23 |
2000 |
34th Olympiad | A70 Benoni, Classical with 7.Nf3 |
| 33. B Hatanbaatar vs I Papaioannou |
| 0-1 | 81 |
2000 |
34th Olympiad | B01 Scandinavian |
| 34. G Milos vs I Papaioannou |
| 0-1 | 71 |
2000 |
34th Olympiad | B01 Scandinavian |
| 35. Fedorov vs I Papaioannou |
| ½-½ | 19 |
2001 |
EuTCh | B01 Scandinavian |
| 36. I Papaioannou vs M Quinn |
| ½-½ | 42 |
2001 |
EuTCh | B20 Sicilian |
| 37. Gelfand vs I Papaioannou |
| ½-½ | 49 |
2001 |
EuTCh | A15 English |
| 38. V Milov vs I Papaioannou |
| ½-½ | 44 |
2001 |
EuTCh | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 39. I Papaioannou vs Shirov |
| ½-½ | 54 |
2001 |
EuTCh | D12 Queen's Gambit Declined Slav |
| 40. I Papaioannou vs Adams |
| 0-1 | 43 |
2001 |
EuTCh | A13 English |
| 41. I Papaioannou vs Stefansson |
| 1-0 | 35 |
2001 |
EuTCh | A46 Queen's Pawn Game |
| 42. I Papaioannou vs P Kadiltzoglou |
| ½-½ | 21 |
2001 |
open | A01 Nimzovich-Larsen Attack |
| 43. I Papaioannou vs Krasenkow |
| 1-0 | 42 |
2001 |
EuTCh | D85 Grunfeld |
| 44. Z Sturua vs I Papaioannou |
| ½-½ | 28 |
2001 |
EuTCh | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 45. Movsesian vs I Papaioannou |
 | 1-0 | 32 |
2002 |
Bled Olympiad | B01 Scandinavian |
| 46. J Alvarez vs I Papaioannou |
| ½-½ | 18 |
2002 |
Bled Olympiad | A67 Benoni, Taimanov Variation |
| 47. R Matoewi vs I Papaioannou |
| 0-1 | 64 |
2002 |
Bled Olympiad | B17 Caro-Kann, Steinitz Variation |
| 48. I Papaioannou vs Azmaiparashvili |
| ½-½ | 21 |
2002 |
Bled Olympiad | D85 Grunfeld |
| 49. P Ricardi vs I Papaioannou |
| ½-½ | 61 |
2002 |
Bled Olympiad | B17 Caro-Kann, Steinitz Variation |
| 50. Kasimdzhanov vs I Papaioannou |
| ½-½ | 39 |
2002 |
Bled Olympiad | B01 Scandinavian |