Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Aug. 25, 2024 (latest changes Aug. 25, 2024).
177 place (113.74).
how we calculated rating score
max_coefficients = (4.60 * 1 + 4 * 1 + 3.65 * 1 + 3.05 * 1) = 15.3
p1 = (272.73 * 1.10 * 0.43 + 866.67 * 1 * 0.71 + 0 + 0 + 0) / (1.10 * 0.43 + 1 * 0.71 + 1 + 1 + 1) = 178.61511410114292
p2 = (866.67 * 1 * 0.71 + 272.73 * 1.10 * 0.43) / max_coefficients = 48.86535947712418
score = 178.61511410114292 * 0.5 + 48.86535947712418 * 0.5 = 113.74023678913355
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-08-25 | 178 -> 177 | 113.74 | |
| 2024-08-22 | 177 -> 178 | 113.74 | |
| 2024-08-11 | 177 | 113.48 -> 113.74 | |
| 2024-08-04 | 174 -> 177 | 114.46 -> 113.48 | |
| 2024-07-14 | 169 -> 174 | 117.60 -> 114.46 |
Survive after yakuman: 57% -> 43% |
| 2024-07-09 | 170 -> 169 | 117.60 | |
| 2024-07-01 | 169 -> 170 | 132.66 -> 117.60 |
Spring Tournament Irkutsk 2023: 86% -> 71% |
| 2024-06-25 | 170 -> 169 | 132.66 | |
| 2024-06-20 | 171 -> 170 | 132.66 | |
| 2024-06-11 | 181 -> 171 | 131.59 -> 132.66 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 867 |
|
3/16 | 71% | 1.00 | CRR | Spring Tournament Irkutsk 2023 |
| 2 | 273 |
|
9/12 | 43% | 1.10 | CRR | Survive after yakuman |
| 3 | 0 |
|
16/16 | 0% | 1.20 | CRR | Winter tournament |
| 4 | 727 |
|
4/12 | 0% | 1.10 | CRR | Summer tournament |
| 5 | 133 |
|
14/16 | 0% | 1.20 | CRR | Winter tournament |
| 6 | 158 |
|
17/20 | 0% | 1.30 | CRR | Irkutsk Winter Tournament 2019 |