Bikbulatov Ruslan
From Chelyabinsk, Russia
Common russian riichi rating (CRR)
Rating date Sept. 15, 2025 (latest changes Sept. 15, 2025).
140 place (336.35).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (629.63 * 2.30 * 0.14 + 568.42 * 3.85 * 0.86 + 493.51 * 3.45 * 1 + 0 + 0) / (2.30 * 0.14 + 3.85 * 0.86 + 3.45 * 1 + 1 + 1) = 416.9453010159712
p2 = (568.42 * 3.85 * 0.86 + 493.51 * 3.45 * 1 + 629.63 * 2.30 * 0.14) / max_coefficients = 255.75945945945946
score = 416.9453010159712 * 0.5 + 255.75945945945946 * 0.5 = 336.35238023771535
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-15 | 141 -> 140 | 336.35 | |
| 2025-09-12 | 142 -> 141 | 336.35 | |
| 2025-09-05 | 139 -> 142 | 347.05 -> 336.35 |
Finding Dora: 29% -> 14% |
| 2025-09-03 | 140 -> 139 | 347.05 | |
| 2025-09-01 | 137 -> 140 | 357.77 -> 347.05 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 189 -> 137 | 258.91 -> 357.77 |
SPB Riichi Open 2025: 0% -> 100% |
| 2025-08-26 | 169 -> 189 | 290.17 -> 258.91 | |
| 2025-08-25 | 172 -> 169 | 290.17 | |
| 2025-08-04 | 174 -> 172 | 289.29 -> 290.17 | |
| 2025-08-03 | 168 -> 174 | 289.29 |