Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date March 2, 2025 (latest changes March 2, 2025).
183 place (99.49).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (485.98 * 4 * 0.57 + 21.74 * 2.10 * 1 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.57 + 2.10 * 1 + 3.85 * 1 + 1 + 1) = 120.89765133455782
p2 = (485.98 * 4 * 0.57 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 1) / max_coefficients = 78.07318611987382
score = 120.89765133455782 * 0.5 + 78.07318611987382 * 0.5 = 99.48541872721583
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-03-02 | 180 -> 183 | 99.49 | |
| 2025-02-16 | 173 -> 180 | 99.49 | |
| 2025-02-02 | 167 -> 173 | 99.49 | |
| 2025-01-26 | 159 -> 167 | 99.49 | |
| 2025-01-07 | 156 -> 159 | 99.49 | |
| 2025-01-03 | 153 -> 156 | 117.90 -> 99.49 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-11-06 | 159 -> 153 | 117.90 | |
| 2024-11-03 | 155 -> 159 | 135.34 -> 117.90 |
SPB Riichi Open 2023: 86% -> 71% |
| 2024-10-13 | 142 -> 155 | 136.51 -> 135.34 | |
| 2024-09-06 | 144 -> 142 | 136.51 |