Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Feb. 19, 2023 (latest changes Feb. 19, 2023).
127 place (91.97).
how we calculated rating score
max_coefficients = (4.20 * 1 + 4.05 * 1 + 3.50 * 1 + 2.80 * 1) = 14.55
p1 = (727.27 * 1.10 * 0.43 + 0 * 1.20 * 0.86 + 272.73 * 1.10 * 1 + 0 + 0) / (1.10 * 0.43 + 1.20 * 0.86 + 1.10 * 1 + 1 + 1) = 139.75712937882338
p2 = (727.27 * 1.10 * 0.43 + 272.73 * 1.10 * 1 + 0 * 1.20 * 0.86) / max_coefficients = 44.18419243986254
score = 139.75712937882338 * 0.5 + 44.18419243986254 * 0.5 = 91.97066090934297
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-01-28 | 127 | 91.73 -> 91.97 | |
| 2023-01-14 | 130 -> 127 | 49.75 -> 91.73 |
Survive after yakuman: 0% -> 100% |
| 2023-01-05 | 130 | 48.36 -> 49.75 |
Winter tournament: 100% -> 86% |
| 2023-01-03 | 131 -> 130 | 76.32 -> 48.36 |
Winter tournament: 14% -> 0% Summer tournament: 57% -> 43% |
| 2022-12-19 | 131 | 76.16 -> 76.32 | |
| 2022-12-18 | 129 -> 131 | 76.16 | |
| 2022-12-03 | 177 -> 129 | 46.10 -> 76.16 | |
| 2021-02-01 | 177 | 46.10 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 273 |
|
9/12 | 100% | 1.10 | CRR | Survive after yakuman |
| 2 | 0 |
|
16/16 | 86% | 1.20 | CRR | Winter tournament |
| 3 | 727 |
|
4/12 | 43% | 1.10 | CRR | Summer tournament |
| 4 | 133 |
|
14/16 | 0% | 1.20 | CRR | Winter tournament |
| 5 | 158 |
|
17/20 | 0% | 1.30 | CRR | Irkutsk Winter Tournament 2019 |