Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Sept. 1, 2024 (latest changes Sept. 1, 2024).
187 place (96.52).
how we calculated rating score
max_coefficients = (4.60 * 1 + 4 * 1 + 3.85 * 1 + 3.65 * 1) = 16.099999999999998
p1 = (866.67 * 1 * 0.57 + 272.73 * 1.10 * 0.43 + 0 + 0 + 0) / (1 * 0.57 + 1.10 * 0.43 + 1 + 1 + 1) = 154.29423724788884
p2 = (866.67 * 1 * 0.57 + 272.73 * 1.10 * 0.43) / max_coefficients = 38.744720496894416
score = 154.29423724788884 * 0.5 + 38.744720496894416 * 0.5 = 96.51947887239163
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-09-01 | 171 -> 187 | 113.74 -> 96.52 |
Spring Tournament Irkutsk 2023: 71% -> 57% |
| 2024-08-26 | 177 -> 171 | 113.74 | |
| 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 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 867 |
|
3/16 | 57% | 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 |