Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date May 28, 2023 (latest changes May 28, 2023).
116 place (209.71).
how we calculated rating score
max_coefficients = (4.20 * 1 + 4.05 * 1 + 2.80 * 1 + 3.50 * 0.71) = 13.55005
p1 = (866.67 * 1 * 1 + 727.27 * 1.10 * 0.14 + 0 * 1.20 * 0.57 + 272.73 * 1.10 * 1 + 0) / (1 * 1 + 1.10 * 0.14 + 1.20 * 0.57 + 1.10 * 1 + 1) = 324.8877086995006
p2 = (866.67 * 1 * 1 + 272.73 * 1.10 * 1 + 727.27 * 1.10 * 0.14 + 0 * 1.20 * 0.57) / max_coefficients = 94.53765853262534
score = 324.8877086995006 * 0.5 + 94.53765853262534 * 0.5 = 209.71268361606298
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-05-20 | 116 | 208.03 -> 209.71 | |
| 2023-05-06 | 117 -> 116 | 208.03 | |
| 2023-05-05 | 177 -> 117 | 46.10 -> 208.03 |
Winter tournament: 71% -> 57% |
| 2021-02-01 | 177 | 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 | 57% | 1.20 | CRR | Winter tournament | Irkutsk |
| 4 | 727 |
|
4/12 | 14% | 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 |