Datkov Sergey
From Yekaterinburg, Russia
Common russian riichi rating (CRR)
Rating date Feb. 8, 2026 (latest changes Feb. 8, 2026).
294 place (72.87).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (555.56 * 2.30 * 0.14 + 171.43 * 2.50 * 1 + 0 + 0 + 0) / (2.30 * 0.14 + 2.50 * 1 + 1 + 1 + 1) = 104.85410908491988
p2 = (171.43 * 2.50 * 1 + 555.56 * 2.30 * 0.14) / max_coefficients = 40.88026755852843
score = 104.85410908491988 * 0.5 + 40.88026755852843 * 0.5 = 72.86718832172416
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-02-08 | 268 -> 294 | 74.18 -> 72.87 |
One tsumo until spring: 0% -> 100% |
| 2025-11-01 | 268 | 74.12 -> 74.18 | |
| 2025-10-25 | 260 -> 268 | 97.23 -> 74.12 |
Chasing Kan: 43% -> 29% |
| 2025-10-22 | 261 -> 260 | 97.23 | |
| 2025-10-13 | 262 -> 261 | 96.55 -> 97.23 | |
| 2025-10-04 | 263 -> 262 | 96.55 | |
| 2025-09-19 | 264 -> 263 | 96.55 | |
| 2025-09-05 | 262 -> 264 | 105.03 -> 96.55 |
Finding Dora: 29% -> 14% |
| 2025-09-03 | 272 -> 262 | 105.03 | |
| 2025-09-01 | 272 | 104.37 -> 105.03 |