Bikbulatov Ruslan
From Chelyabinsk, Russia
Internal rating (RR)
Rating date Nov. 1, 2025 (latest changes Nov. 1, 2025).
142 place (291.68).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3
p1 = (568.42 * 3.85 * 0.71 + 493.51 * 3.45 * 1 + 0 + 0 + 0) / (3.85 * 0.71 + 3.45 * 1 + 1 + 1 + 1) = 354.97505177958175
p2 = (493.51 * 3.45 * 1 + 568.42 * 3.85 * 0.71) / max_coefficients = 228.37692307692305
score = 354.97505177958175 * 0.5 + 228.37692307692305 * 0.5 = 291.67598742825237
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-11-01 | 134 -> 142 | 308.19 -> 291.68 |
SPB Riichi Open 2024: 86% -> 71% |
| 2025-10-13 | 134 | 304.39 -> 308.19 | |
| 2025-10-09 | 133 -> 134 | 304.39 | |
| 2025-10-04 | 135 -> 133 | 304.39 | |
| 2025-09-12 | 136 -> 135 | 304.39 | |
| 2025-09-10 | 137 -> 136 | 304.39 | |
| 2025-09-03 | 140 -> 137 | 304.39 | |
| 2025-09-01 | 134 -> 140 | 316.88 -> 304.39 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 124 -> 134 | 131.03 -> 316.88 |
SPB Riichi Open 2025: 0% -> 100% |
| 2021-02-01 | 163 -> 124 | 265.28 -> 131.03 |