Petrovskaya Ekaterina
From Simferopol, Russia
Common russian riichi rating (CRR)
Rating date Nov. 1, 2025 (latest changes Nov. 1, 2025).
275 place (50.39).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3
p1 = (200 * 1.80 * 0.86 + 86.96 * 1.20 * 1 + 0 + 0 + 0) / (1.80 * 0.86 + 1.20 * 1 + 1 + 1 + 1) = 71.90071707430896
p2 = (200 * 1.80 * 0.86 + 86.96 * 1.20 * 1) / max_coefficients = 28.874825174825173
score = 71.90071707430896 * 0.5 + 28.874825174825173 * 0.5 = 50.38777112456707
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-11-01 | 275 | 50.34 -> 50.39 | |
| 2025-10-27 | 274 -> 275 | 54.88 -> 50.34 |
Happy Bamboo 2024: 100% -> 86% |
| 2025-10-22 | 275 -> 274 | 54.88 | |
| 2025-10-13 | 275 | 54.38 -> 54.88 | |
| 2025-09-30 | 276 -> 275 | 54.38 | |
| 2025-09-03 | 286 -> 276 | 54.38 | |
| 2025-09-01 | 286 | 53.97 -> 54.38 | |
| 2025-08-31 | 280 -> 286 | 53.97 | |
| 2025-08-25 | 281 -> 280 | 53.97 | |
| 2025-08-04 | 281 | 53.82 -> 53.97 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 87 |
|
22/24 | 100% | 1.20 | CRR | Pands in discards | Simferopol | |
| 2 | 200 |
|
13/16 | 86% | 1.80 | CRR | Happy Bamboo 2024 | Simferopol |