Biryukov Sergei
From Kurchatov, Russia
Common russian riichi rating (CRR)
Rating date Oct. 28, 2026 (latest changes Oct. 27, 2026).
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-10-27 | 305 -> 304 | 153.37 | |
| 2026-10-26 | 307 -> 305 | 153.37 | |
| 2026-10-24 | 307 | 153.37 |
First Yaroslavl tournament: 0% -> 100% |