Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date April 18, 2024 (latest changes April 18, 2024).
150 place (152.39).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 3.05 * 1 + 2.90 * 1) = 13.700000000000001
p1 = (272.73 * 1.10 * 0.71 + 866.67 * 1 * 1 + 0 + 0 + 0) / (1.10 * 0.71 + 1 * 1 + 1 + 1 + 1) = 225.8714971383676
p2 = (866.67 * 1 * 1 + 272.73 * 1.10 * 0.71) / max_coefficients = 78.90218978102189
score = 225.8714971383676 * 0.5 + 78.90218978102189 * 0.5 = 152.38684345969475
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-04-17 | 151 -> 150 | 152.39 | |
| 2024-04-12 | 153 -> 151 | 152.39 | |
| 2024-03-30 | 146 -> 153 | 152.39 | |
| 2024-03-20 | 152 -> 146 | 152.39 | |
| 2024-03-14 | 151 -> 152 | 154.69 -> 152.39 |
Survive after yakuman: 86% -> 71% |
| 2024-03-10 | 148 -> 151 | 156.74 -> 154.69 | |
| 2024-03-06 | 147 -> 148 | 154.84 -> 156.74 | |
| 2024-02-25 | 143 -> 147 | 154.84 | |
| 2024-02-12 | 145 -> 143 | 154.84 | |
| 2024-01-20 | 147 -> 145 | 154.84 |
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 | 71% | 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 |