Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date Aug. 13, 2025 (latest changes Aug. 9, 2025).
288 place (37.91).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (485.98 * 4 * 0.14 + 21.74 * 2.10 * 0.57 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.14 + 2.10 * 0.57 + 3.85 * 1 + 1 + 1) = 50.50554087494129
p2 = (485.98 * 4 * 0.14 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.57) / max_coefficients = 25.32434210526316
score = 50.50554087494129 * 0.5 + 25.32434210526316 * 0.5 = 37.91494149010222
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-04 | 288 | 37.79 -> 37.91 | |
| 2025-08-03 | 283 -> 288 | 37.79 | |
| 2025-08-02 | 282 -> 283 | 37.79 | |
| 2025-07-30 | 282 | 37.46 -> 37.79 |
Seihoku spring tournament 2024: 71% -> 57% |
| 2025-07-26 | 277 -> 282 | 37.46 | |
| 2025-07-13 | 274 -> 277 | 37.46 | |
| 2025-07-12 | 274 | 37.22 -> 37.46 | |
| 2025-07-05 | 275 -> 274 | 37.22 | |
| 2025-07-03 | 270 -> 275 | 60.77 -> 37.22 |
SPB Riichi Open 2023: 29% -> 14% |
| 2025-06-15 | 261 -> 270 | 61.41 -> 60.77 |