Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date April 27, 2025 (latest changes April 27, 2025).
188 place (80.98).
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 * 0.43 + 21.74 * 2.10 * 0.86 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.43 + 2.10 * 0.86 + 3.85 * 1 + 1 + 1) = 101.80675351414038
p2 = (485.98 * 4 * 0.43 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.86) / max_coefficients = 60.148264984227126
score = 101.80675351414038 * 0.5 + 60.148264984227126 * 0.5 = 80.97750924918375
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-04-27 | 187 -> 188 | 80.98 | |
| 2025-04-26 | 184 -> 187 | 80.98 | |
| 2025-03-30 | 185 -> 184 | 79.94 -> 80.98 |
Seihoku spring tournament 2024: 100% -> 86% |
| 2025-03-03 | 184 -> 185 | 99.49 -> 79.94 |
SPB Riichi Open 2023: 57% -> 43% |
| 2025-03-02 | 181 -> 184 | 99.49 | |
| 2025-02-16 | 174 -> 181 | 99.49 | |
| 2025-02-02 | 168 -> 174 | 99.49 | |
| 2025-01-26 | 159 -> 168 | 99.49 | |
| 2025-01-07 | 156 -> 159 | 99.49 | |
| 2025-01-03 | 153 -> 156 | 117.90 -> 99.49 |
SPB Riichi Open 2023: 71% -> 57% |