Petrovskaya Ekaterina
From Simferopol, Russia
Common russian riichi rating (CRR)
Rating date Aug. 31, 2026 (latest changes Aug. 31, 2026).
358 place (18.42).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41
p1 = (200 * 1.80 * 0.14 + 86.96 * 1.20 * 0.86 + 0 * 1.80 * 1 + 0 + 0) / (1.80 * 0.14 + 1.20 * 0.86 + 1.80 * 1 + 1 + 1) = 27.70098353435292
p2 = (86.96 * 1.20 * 0.86 + 200 * 1.80 * 0.14 + 0 * 1.80 * 1) / max_coefficients = 9.142115509409473
score = 27.70098353435292 * 0.5 + 9.142115509409473 * 0.5 = 18.421549521881197
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-08-31 | 358 | 18.41 -> 18.42 | |
| 2026-08-30 | 355 -> 358 | 18.41 | |
| 2026-08-27 | 353 -> 355 | 24.21 -> 18.41 |
Happy Bamboo 2024: 29% -> 14% |
| 2026-08-16 | 351 -> 353 | 24.21 | |
| 2026-08-15 | 351 | 24.17 -> 24.21 | |
| 2026-08-04 | 359 -> 351 | 24.17 | |
| 2026-08-02 | 348 -> 359 | 24.17 | |
| 2026-07-26 | 347 -> 348 | 25.44 -> 24.17 |
Pands in discards: 100% -> 86% |
| 2026-07-25 | 342 -> 347 | 28.63 -> 25.44 |
Seihoku Summer Tournament 2026: 0% -> 100% |
| 2026-07-15 | 343 -> 342 | 28.63 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 0 |
|
32/32 | 100% | 1.80 | RR | Seihoku Summer Tournament 2026 | Saint Petersburg | |
| 2 | 87 |
|
22/24 | 86% | 1.20 | CRR | Pands in discards | Simferopol | |
| 3 | 200 |
|
13/16 | 14% | 1.80 | CRR | Happy Bamboo 2024 | Simferopol |