Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date March 5, 2026 (latest changes March 2, 2026).
242 place (4.17).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (21.74 * 2.10 * 0.14 + 21.05 * 3.85 * 0.43 + 0 * 3.45 * 1 + 0 + 0) / (2.10 * 0.14 + 3.85 * 0.43 + 3.45 * 1 + 1 + 1) = 5.575524985811195
p2 = (21.05 * 3.85 * 0.43 + 21.74 * 2.10 * 0.14 + 0 * 3.45 * 1) / max_coefficients = 2.7598662207357862
score = 5.575524985811195 * 0.5 + 2.7598662207357862 * 0.5 = 4.167695603273491
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-03-01 | 242 | 5.09 -> 4.17 |
SPB Riichi Open 2024: 57% -> 43% |
| 2026-02-23 | 235 -> 242 | 5.09 | |
| 2026-01-30 | 235 | 5.58 -> 5.09 |
Seihoku spring tournament 2024: 29% -> 14% |
| 2026-01-25 | 231 -> 235 | 5.58 | |
| 2026-01-07 | 229 -> 231 | 5.58 | |
| 2026-01-01 | 229 | 6.40 -> 5.58 |
SPB Riichi Open 2024: 71% -> 57% |
| 2025-12-07 | 225 -> 229 | 6.40 | |
| 2025-11-30 | 224 -> 225 | 6.85 -> 6.40 |
Seihoku spring tournament 2024: 43% -> 29% |
| 2025-11-04 | 217 -> 224 | 6.97 -> 6.85 | |
| 2025-11-01 | 217 | 7.72 -> 6.97 |
SPB Riichi Open 2024: 86% -> 71% |