28 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Jan Oltmanns | Yaroslav Bilenko | 1-0 | B56 | Round 2: Jan Oltmanns - Yaroslav Bilenko | 2024-01-01 |
| Jan Oltmanns | Alexander Bagrationi | 0-1 | B39 | Round 3: Jan Oltmanns - Alexander Bagrationi | 2024-01-01 |
| Jan Oltmanns | Pascal Berkle | 1-0 | B04 | Round 5: Jan Oltmanns - Pascal Berkle | 2024-01-01 |
| Jan Oltmanns | Andrii Palchuk | 0-1 | B15 | Round 8: Jan Oltmanns - Andrii Palchuk | 2024-01-01 |
| Jan Oltmanns | Emil Frederick Schuricht | 1-0 | B15 | Round 10: Jan Oltmanns - Emil Frederick Schuricht | 2024-01-01 |
| Jan Oltmanns | Edgard Zhuikov | 1-0 | C55 | Round 13: Jan Oltmanns - Edgard Zhuikov | 2024-01-01 |
| Jan Oltmanns | Fatmir Haskaj | 1-0 | C05 | Round 14: Jan Oltmanns - Fatmir Haskaj | 2024-01-01 |
| Jan Oltmanns | Julian-Frank Reuter | 1-0 | B90 | Round 16: Jan Oltmanns - Julian-Frank Reuter | 2024-01-01 |
| Jan Oltmanns | Niklas Jäger | 1-0 | C10 | Round 19: Jan Oltmanns - Niklas Jäger | 2024-01-01 |
| Jan Oltmanns | Sviatoslav Sunko | 1/2-1/2 | B90 | Round 20: Jan Oltmanns - Sviatoslav Sunko | 2024-01-01 |
| Jan Oltmanns | Emil Meyer | 0-1 | B10 | Runde 7: Jan Oltmanns - Emil Meyer | 2023-10-05 |
| Jan Oltmanns | Kenneth Grodotzki | 1-0 | C07 | Runde 5: Jan Oltmanns - Kenneth Grodotzki | 2023-10-03 |
| Jan Oltmanns | Oleg Korneev | 0-1 | B32 | Runde 3: Jan Oltmanns - Oleg Korneev | 2023-10-01 |
| Jan Oltmanns | Harry Broeken | 1-0 | B48 | Runde 1: Jan Oltmanns - Harry Broeken | 2023-09-30 |