Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Oct. 19, 2023 (latest changes Oct. 19, 2023).
149 place (170.85).
how we calculated rating score
max_coefficients = (4.20 * 1 + 4 * 1 + 3.75 * 1 + 2.80 * 1) = 14.75
p1 = (866.67 * 1 * 1 + 0 * 1.20 * 0.29 + 272.73 * 1.10 * 1 + 0 + 0) / (1 * 1 + 1.20 * 0.29 + 1.10 * 1 + 1 + 1) = 262.5955469924643
p2 = (866.67 * 1 * 1 + 272.73 * 1.10 * 1 + 0 * 1.20 * 0.29) / max_coefficients = 79.09627118644069
score = 262.5955469924643 * 0.5 + 79.09627118644069 * 0.5 = 170.84590908945248
Rating changes
Date | Place | Points | Reason |
---|---|---|---|
2023-10-19 | 151 -> 149 | 170.85 | |
2023-10-12 | 152 -> 151 | 170.60 -> 170.85 | |
2023-09-28 | 153 -> 152 | 170.60 | |
2023-09-09 | 154 -> 153 | 170.60 | |
2023-09-06 | 156 -> 154 | 170.60 | |
2023-09-05 | 158 -> 156 | 165.72 -> 170.60 |
Winter tournament: 43% -> 29% |
2023-09-03 | 140 -> 158 | 169.18 -> 165.72 | |
2023-08-27 | 136 -> 140 | 169.18 | |
2023-08-26 | 135 -> 136 | 169.18 | |
2023-08-19 | 136 -> 135 | 169.18 |
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 | 100% | 1.10 | CRR | Survive after yakuman |
3 | 0 |
|
16/16 | 29% | 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 |