Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date July 14, 2025 (latest changes July 14, 2025).
206 place (37.46).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.35
p1 = (485.98 * 4 * 0.14 + 21.74 * 2.10 * 0.71 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.14 + 2.10 * 0.71 + 3.85 * 1 + 1 + 1) = 49.41533497525131
p2 = (485.98 * 4 * 0.14 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.71) / max_coefficients = 25.50162866449512
score = 49.41533497525131 * 0.5 + 25.50162866449512 * 0.5 = 37.458481819873214
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-07-13 | 202 -> 206 | 37.46 | |
| 2025-07-12 | 202 | 37.22 -> 37.46 | |
| 2025-07-03 | 199 -> 202 | 60.77 -> 37.22 |
SPB Riichi Open 2023: 29% -> 14% |
| 2025-06-15 | 186 -> 199 | 61.41 -> 60.77 | |
| 2025-06-11 | 196 -> 186 | 61.41 | |
| 2025-05-30 | 196 | 60.65 -> 61.41 |
Seihoku spring tournament 2024: 86% -> 71% |
| 2025-05-12 | 196 | 59.73 -> 60.65 | |
| 2025-05-03 | 188 -> 196 | 80.98 -> 59.73 |
SPB Riichi Open 2023: 43% -> 29% |
| 2025-04-27 | 187 -> 188 | 80.98 | |
| 2025-04-26 | 184 -> 187 | 80.98 |