Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date May 12, 2026 (latest changes May 12, 2026).
239 place (2.31).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.45 * 1 + 3.40 * 1) = 14.85
p1 = (21.05 * 3.85 * 0.29 + 0 * 3.45 * 1 + 0 + 0 + 0) / (3.85 * 0.29 + 3.45 * 1 + 1 + 1 + 1) = 3.0675720154252777
p2 = (21.05 * 3.85 * 0.29 + 0 * 3.45 * 1) / max_coefficients = 1.5595959595959596
score = 3.0675720154252777 * 0.5 + 1.5595959595959596 * 0.5 = 2.3135839875106186
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-05-12 | 250 -> 239 | 2.31 | |
| 2026-05-03 | 246 -> 250 | 2.31 | |
| 2026-05-01 | 246 | 3.31 -> 2.31 |
SPB Riichi Open 2024: 43% -> 29% |
| 2026-04-19 | 234 -> 246 | 3.31 | |
| 2026-04-11 | 231 -> 234 | 3.31 | |
| 2026-04-05 | 230 -> 231 | 3.31 | |
| 2026-03-30 | 239 -> 230 | 4.17 -> 3.31 |
Seihoku spring tournament 2024: 14% -> 0% |
| 2026-03-10 | 242 -> 239 | 4.17 | |
| 2026-03-01 | 242 | 5.09 -> 4.17 |
SPB Riichi Open 2024: 57% -> 43% |
| 2026-02-23 | 235 -> 242 | 5.09 |