Petrovskaya Ekaterina
From Simferopol, Russia
Common russian riichi rating (CRR)
Rating date Dec. 29, 2025 (latest changes Dec. 29, 2025).
294 place (45.04).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (200 * 1.80 * 0.71 + 86.96 * 1.20 * 1 + 0 + 0 + 0) / (1.80 * 0.71 + 1.20 * 1 + 1 + 1 + 1) = 65.89812860252218
p2 = (200 * 1.80 * 0.71 + 86.96 * 1.20 * 1) / max_coefficients = 24.180602006688964
score = 65.89812860252218 * 0.5 + 24.180602006688964 * 0.5 = 45.03936530460557
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-27 | 287 -> 294 | 49.76 -> 45.04 |
Happy Bamboo 2024: 86% -> 71% |
| 2025-12-07 | 284 -> 287 | 49.76 | |
| 2025-12-06 | 279 -> 284 | 49.76 | |
| 2025-11-30 | 278 -> 279 | 49.76 | |
| 2025-11-25 | 279 -> 278 | 49.76 | |
| 2025-11-04 | 275 -> 279 | 50.39 -> 49.76 | |
| 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 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 87 |
|
22/24 | 100% | 1.20 | CRR | Pands in discards | Simferopol | |
| 2 | 200 |
|
13/16 | 71% | 1.80 | CRR | Happy Bamboo 2024 | Simferopol |