| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. G Osterman vs B Zlender |
| 0-1 | 51 | 1998 | John F Cleeve mem | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 27. G Osterman vs F Brglez |
 | 1-0 | 29 | 1998 | John F Cleeve mem | C41 Philidor Defense |
| 28. R Hiltunen vs G Osterman |
| 0-1 | 81 | 1998 | John F Cleeve mem | E32 Nimzo-Indian, Classical |
| 29. A P Borwell vs G Osterman |
| 0-1 | 40 | 1998 | John F Cleeve mem | E32 Nimzo-Indian, Classical |
| 30. G Osterman vs K E Engel |
| 0-1 | 43 | 1998 | John F Cleeve mem | B93 Sicilian, Najdorf, 6.f4 |
| 31. R A Redolfi vs G Osterman |
| 1-0 | 46 | 1999 | John F Cleeve mem | A09 Reti Opening |
| 32. A Kozlowicz vs G Osterman |
| ½-½ | 61 | 1999 | John F Cleeve mem | C42 Petrov Defense |
| 33. J DeMauro vs G Osterman |
| ½-½ | 51 | 1999 | John F Cleeve mem | A62 Benoni, Fianchetto Variation |
| 34. G Osterman vs D Pineault |
| 1-0 | 33 | 1999 | John F Cleeve mem | B32 Sicilian |
| 35. G Osterman vs R Polaczek |
| 1-0 | 40 | 1999 | Pereyra mem-A email | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 36. A Issakainen vs G Osterman |
| ½-½ | 26 | 2000 | FIN-chT 2000/01 | A51 Budapest Gambit |
| 37. G Osterman vs A Kujala |
| 0-1 | 20 | 2000 | FIN-chT 2000/01 | C01 French, Exchange |
| 38. G Osterman vs A Seppanen |
| ½-½ | 70 | 2001 | FIN-chT 2000/01 | B40 Sicilian |
| 39. G Osterman vs J Kivijarvi |
| 1-0 | 20 | 2001 | FIN-chT 2000/01 | C48 Four Knights |
| 40. G Osterman vs P Paldanius |
| 0-1 | 34 | 2001 | FIN-chT 2000/01 | B83 Sicilian |
| 41. G Osterman vs H Pigg |
| ½-½ | 63 | 2001 | FIN jub40 corr | B89 Sicilian |
Kibitzing
