Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Nov. 6, 2023 (latest changes Nov. 6, 2023).
151 place (177.79).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 4.20 * 0.86 + 2.80 * 1) = 14.149820000000002
p1 = (272.73 * 1.10 * 1 + 0 * 1.20 * 0.14 + 866.67 * 1 * 1 + 0 + 0) / (1.10 * 1 + 1.20 * 0.14 + 1 * 1 + 1 + 1) = 273.1301562924326
p2 = (866.67 * 1 * 1 + 272.73 * 1.10 * 1 + 0 * 1.20 * 0.14) / max_coefficients = 82.45122552795723
score = 273.1301562924326 * 0.5 + 82.45122552795723 * 0.5 = 177.79069091019494
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-11-06 | 173 -> 151 | 46.10 -> 177.79 | |
| 2021-02-01 | 173 | 46.10 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 867 |
|
🥉 | 3/16 | 100% | 1.00 | CRR | Spring Tournament Irkutsk 2023 | Irkutsk |
| 2 | 273 |
|
9/12 | 100% | 1.10 | CRR | Survive after yakuman | Irkutsk | |
| 3 | 0 |
|
16/16 | 14% | 1.20 | CRR | Winter tournament | Irkutsk | |
| 4 | 727 |
|
4/12 | 0% | 1.10 | CRR | Summer tournament | Irkutsk | |
| 5 | 133 |
|
14/16 | 0% | 1.20 | CRR | Winter tournament | Irkutsk | |
| 6 | 158 |
|
17/20 | 0% | 1.30 | CRR | Irkutsk Winter Tournament 2019 | Irkutsk |