35 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Jahncke, Giso | Colbow, Collin | 0-1 | A14 | Schachbundesliga | 2025-04-25 |
| Jahncke, Giso | Tica, Sven | 1/2-1/2 | A13 | Bundesliga 24/25 | 2024-12-01 |
| Jahncke, Giso | Kisic, Bozidar | 0-1 | D02 | Round 6: Jahncke, Giso - Kisic, Bozidar | 2024-10-25 |
| Jahncke, Giso | Ermeni, Avni | 0-1 | A56 | 39th European Chess Club Cup | 2024-10-24 |
| Jahncke, Giso | Vagle, Raymond | 1-0 | A96 | 39th European Chess Club Cup | 2024-10-22 |
| Jahncke, Giso | Simonovic, Miroslav | 1-0 | B39 | 39th European Chess Club Cup | 2024-10-20 |
| Jahncke, Giso | Hrbek, Stepan | 0-1 | A08 | Grenke Chess Open 2024 | 2024-03-31 |
| Jahncke, Giso | Tan, Zhong Kai | 1-0 | E04 | Grenke Open | 2024-03-30 |
| Dr. Giso Jahncke | Bernd Wronn | 1/2-1/2 | E06 | Round 4: Dr. Giso Jahncke - Bernd Wronn | 2024-01-27 |
| Giso, Dr. Jahncke | Bayastan Sydykov | 1/2-1/2 | E04 | Round 2: Giso, Dr. Jahncke - Bayastan Sydykov | 2024-01-26 |
| Jahncke, Giso, Dr. | Freundorfer, Josef | 1-0 | E94 | 25th Open Bavarian Championship | 2022-11-13 |
| Jahncke, Giso, Dr. | Huenerfauth, Uwe | 1-0 | A15 | 25th Open Bavarian Championship | 2022-11-11 |
| Jahncke, Giso, Dr. | Grohde, Wolfgang | 1/2-1/2 | D01 | 25th Open Bavarian Championship | 2022-11-09 |
| Jahncke, Giso, Dr. | Mehlhorn, David | 1-0 | D02 | 25th Open Bavarian Championship | 2022-11-07 |
| Jahncke, Giso | Piscopo, Pierluigi | 1/2-1/2 | E06 | Bastia2022 | 2022-07-15 |
| Jahncke, Giso, Dr. | Cvitan, Ena | 1-0 | D02 | Pula Open | 2022-06-25 |
| Jahncke, Giso, Dr. | Striskova, Lucia | 1-0 | A89 | Pula Open | 2022-06-18 |
| Jahncke, Giso | Galego, Luis | 0-1 | A55 | Guimaraes Chess 2021 | 2021-08-26 |