International
Chess Federation
| Event code | 417215 |
| Tournament Name | 9. Bayer Sommeropen 2025 |
| City | Leverkusen |
| Country | GER |
| Number of players | 100 |
| System | s |
| Hybrid | NO |
| Category | 0 |
| Start Date | 2025-08-15 |
| End Date | 2025-08-17 |
| Date received | 0000-00-00 |
| Date registered | 2025-03-19 |
| Type | |
| Time Control | Standard: 90 minutes with 30 second increment from move 1 |
| Zone | |
| Reported mult. round days | 2 |
| Chief Arbiter | Block, Wolfgang (GER) |
| Deputy Chief Arbiter | Baer, Marco (GER) |
| Chief Organizer | Birnkott, Manfred (GER) |
| Organizer | |
More information: The full list of tournaments received from Germany for September 2025