Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Dec. 18, 2022 (latest changes Dec. 18, 2022).
131 place (76.16).
how we calculated rating score
max_coefficients = (4.20 * 1 + 4.05 * 1 + 3.50 * 1 + 3.10 * 1) = 14.85
p1 = (133.33 * 1.20 * 0.14 + 727.27 * 1.10 * 0.57 + 0 * 1.20 * 1 + 0 + 0) / (1.20 * 0.14 + 1.10 * 0.57 + 1.20 * 1 + 1 + 1) = 119.99440002799986
p2 = (727.27 * 1.10 * 0.57 + 133.33 * 1.20 * 0.14 + 0 * 1.20 * 1) / max_coefficients = 32.32188552188553
score = 119.99440002799986 * 0.5 + 32.32188552188553 * 0.5 = 76.15814277494269
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 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 | 0 |
|
16/16 | 100% | 1.20 | CRR | Winter tournament |
| 2 | 727 |
|
4/12 | 57% | 1.10 | CRR | Summer tournament |
| 3 | 133 |
|
14/16 | 14% | 1.20 | CRR | Winter tournament |
| 4 | 158 |
|
17/20 | 0% | 1.30 | CRR | Irkutsk Winter Tournament 2019 |