Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Sept. 14, 2024 (latest changes Sept. 14, 2024).
187 place (93.46).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.65 * 1 + 4 * 0.86) = 15.5284
p1 = (272.73 * 1.10 * 0.29 + 866.67 * 1 * 0.57 + 0 + 0 + 0) / (1.10 * 0.29 + 1 * 0.57 + 1 + 1 + 1) = 149.50317448470918
p2 = (866.67 * 1 * 0.57 + 272.73 * 1.10 * 0.29) / max_coefficients = 37.410164601633134
score = 149.50317448470918 * 0.5 + 37.410164601633134 * 0.5 = 93.45666954317116
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-09-14 | 187 | 97.23 -> 93.46 |
Survive after yakuman: 43% -> 29% |
| 2024-09-03 | 187 | 96.52 -> 97.23 | |
| 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 |
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 | 29% | 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 |