Petrushin Ivan
From Irkutsk, Russia
Common russian riichi rating (CRR)
Rating date Jan. 5, 2025 (latest changes Jan. 5, 2025).
216 place (51.35).
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 * 0.29 + 0 + 0 + 0) / (1.10 * 0.14 + 1 * 0.29 + 1 + 1 + 1) = 84.37097903215032
p2 = (866.67 * 1 * 0.29 + 272.73 * 1.10 * 0.14) / max_coefficients = 18.326813880126185
score = 84.37097903215032 * 0.5 + 18.326813880126185 * 0.5 = 51.34889645613825
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-01-04 | 215 -> 216 | 51.35 | |
| 2025-01-01 | 213 -> 215 | 70.84 -> 51.35 |
Spring Tournament Irkutsk 2023: 43% -> 29% |
| 2024-12-29 | 212 -> 213 | 70.84 | |
| 2024-12-11 | 213 -> 212 | 70.84 | |
| 2024-11-14 | 213 | 75.49 -> 70.84 |
Survive after yakuman: 29% -> 14% |
| 2024-11-05 | 216 -> 213 | 75.49 | |
| 2024-11-04 | 211 -> 216 | 75.49 | |
| 2024-11-01 | 204 -> 211 | 93.08 -> 75.49 |
Spring Tournament Irkutsk 2023: 57% -> 43% |
| 2024-10-27 | 203 -> 204 | 93.08 | |
| 2024-10-25 | 205 -> 203 | 93.08 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 867 |
|
🥉 | 3/16 | 29% | 1.00 | CRR | Spring Tournament Irkutsk 2023 | Irkutsk |
| 2 | 273 |
|
9/12 | 14% | 1.10 | CRR | Survive after yakuman | Irkutsk | |
| 3 | 0 |
|
16/16 | 0% | 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 |