Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Feb. 27, 2024 (latest changes Feb. 27, 2024).
147 place (154.84).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 4.20 * 0.71 + 2.90 * 1) = 13.650060000000002
p1 = (272.73 * 1.10 * 0.86 + 866.67 * 1 * 1 + 0 + 0 + 0) / (1.10 * 0.86 + 1 * 1 + 1 + 1 + 1) = 227.3605499705633
p2 = (866.67 * 1 * 1 + 272.73 * 1.10 * 0.86) / max_coefficients = 82.32930844260024
score = 227.3605499705633 * 0.5 + 82.32930844260024 * 0.5 = 154.84492920658178
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-02-25 | 143 -> 147 | 154.84 | |
| 2024-02-12 | 145 -> 143 | 154.84 | |
| 2024-01-20 | 147 -> 145 | 154.84 | |
| 2024-01-14 | 147 | 157.11 -> 154.84 |
Survive after yakuman: 100% -> 86% |
| 2024-01-06 | 147 | 155.32 -> 157.11 | |
| 2024-01-05 | 140 -> 147 | 177.50 -> 155.32 |
Winter tournament: 14% -> 0% |
| 2023-12-19 | 147 -> 140 | 177.50 | |
| 2023-12-12 | 149 -> 147 | 177.50 | |
| 2023-11-28 | 154 -> 149 | 177.50 | |
| 2023-11-26 | 149 -> 154 | 177.79 -> 177.50 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 867 |
|
3/16 | 100% | 1.00 | CRR | Spring Tournament Irkutsk 2023 |
| 2 | 273 |
|
9/12 | 86% | 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 |