Bikbulatov Ruslan
From Chelyabinsk, Russia
Internal rating (RR)
Rating date Sept. 4, 2025 (latest changes Sept. 3, 2025).
137 place (304.39).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (568.42 * 3.85 * 0.86 + 493.51 * 3.45 * 1 + 0 + 0 + 0) / (3.85 * 0.86 + 3.45 * 1 + 1 + 1 + 1) = 367.0113391662525
p2 = (568.42 * 3.85 * 0.86 + 493.51 * 3.45 * 1) / max_coefficients = 241.77702702702703
score = 367.0113391662525 * 0.5 + 241.77702702702703 * 0.5 = 304.3941830966398
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 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 | |
| 2020-02-01 | 163 | 265.28 |