Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Dec. 1, 2024 (latest changes Dec. 1, 2024).
212 place (70.84).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (272.73 * 1.10 * 0.14 + 866.67 * 1 * 0.43 + 0 + 0 + 0) / (1.10 * 0.14 + 1 * 0.43 + 1 + 1 + 1) = 115.54497056436657
p2 = (866.67 * 1 * 0.43 + 272.73 * 1.10 * 0.14) / max_coefficients = 26.14006309148265
score = 115.54497056436657 * 0.5 + 26.14006309148265 * 0.5 = 70.84251682792461
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-11-14 | 212 | 75.49 -> 70.84 |
Survive after yakuman: 29% -> 14% |
| 2024-11-05 | 215 -> 212 | 75.49 | |
| 2024-11-04 | 210 -> 215 | 75.49 | |
| 2024-11-01 | 203 -> 210 | 93.08 -> 75.49 |
Spring Tournament Irkutsk 2023: 57% -> 43% |
| 2024-10-27 | 202 -> 203 | 93.08 | |
| 2024-10-25 | 204 -> 202 | 93.08 | |
| 2024-10-13 | 190 -> 204 | 93.46 -> 93.08 | |
| 2024-10-11 | 191 -> 190 | 93.46 | |
| 2024-09-15 | 187 -> 191 | 93.46 | |
| 2024-09-14 | 187 | 97.23 -> 93.46 |
Survive after yakuman: 43% -> 29% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 867 |
|
3/16 | 43% | 1.00 | CRR | Spring Tournament Irkutsk 2023 |
| 2 | 273 |
|
9/12 | 14% | 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 |