Datkov Sergey
From Yekaterinburg, Russia
Common russian riichi rating (CRR)
Rating date July 24, 2026 (latest changes July 23, 2026).
317 place (114.74).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997
p1 = (171.43 * 2.50 * 1 + 322.58 * 2.40 * 1 + 0 + 0 + 0) / (2.50 * 1 + 2.40 * 1 + 1 + 1 + 1) = 152.24810126582278
p2 = (322.58 * 2.40 * 1 + 171.43 * 2.50 * 1) / max_coefficients = 77.2281690574935
score = 152.24810126582278 * 0.5 + 77.2281690574935 * 0.5 = 114.73813516165814
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-07-18 | 315 -> 317 | 114.74 | |
| 2026-07-14 | 318 -> 315 | 114.74 | |
| 2026-07-12 | 296 -> 318 | 72.87 -> 114.74 |
Poplar fluff. Mahjong. July.: 0% -> 100% |
| 2026-02-23 | 288 -> 296 | 72.87 | |
| 2026-02-08 | 269 -> 288 | 74.18 -> 72.87 |
One tsumo until spring: 0% -> 100% |
| 2025-11-01 | 269 | 74.12 -> 74.18 | |
| 2025-10-25 | 260 -> 269 | 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 |