Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date March 6, 2023 (latest changes March 6, 2023).
137 place (80.04).
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 * 0.29 + 0 * 1.20 * 0.71 + 272.73 * 1.10 * 1 + 0 + 0) / (1.10 * 0.29 + 1.20 * 0.71 + 1.10 * 1 + 1 + 1) = 123.74310242705602
p2 = (272.73 * 1.10 * 1 + 727.27 * 1.10 * 0.29 + 0 * 1.20 * 0.71) / max_coefficients = 36.327147766323016
score = 123.74310242705602 * 0.5 + 36.327147766323016 * 0.5 = 80.03512509668951
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-03-05 | 138 -> 137 | 77.65 -> 80.04 |
Winter tournament: 86% -> 71% |
| 2023-03-03 | 136 -> 138 | 91.97 -> 77.65 |
Summer tournament: 43% -> 29% |
| 2023-02-25 | 127 -> 136 | 91.97 | |
| 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 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 273 |
|
9/12 | 100% | 1.10 | CRR | Survive after yakuman |
| 2 | 0 |
|
16/16 | 71% | 1.20 | CRR | Winter tournament |
| 3 | 727 |
|
4/12 | 29% | 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 |