Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date April 11, 2025 (latest changes April 11, 2025).
237 place (103.72).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (1000 * 1.40 * 0.14 + 485.98 * 4 * 0.43 + 21.74 * 2.10 * 0.86 + 21.05 * 3.85 * 1 + 0) / (1.40 * 0.14 + 4 * 0.43 + 2.10 * 0.86 + 3.85 * 1 + 1) = 134.67540519617907
p2 = (485.98 * 4 * 0.43 + 1000 * 1.40 * 0.14 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.86) / max_coefficients = 72.77034700315458
score = 134.67540519617907 * 0.5 + 72.77034700315458 * 0.5 = 103.72287609966682
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-03-30 | 237 | 102.02 -> 103.72 |
Seihoku spring tournament 2024: 100% -> 86% |
| 2025-03-29 | 233 -> 237 | 102.02 | |
| 2025-03-23 | 221 -> 233 | 102.02 | |
| 2025-03-05 | 222 -> 221 | 102.02 | |
| 2025-03-03 | 214 -> 222 | 121.52 -> 102.02 |
SPB Riichi Open 2023: 57% -> 43% |
| 2025-03-02 | 213 -> 214 | 121.52 | |
| 2025-03-01 | 214 -> 213 | 121.52 | |
| 2025-02-26 | 215 -> 214 | 121.52 | |
| 2025-02-25 | 212 -> 215 | 129.46 -> 121.52 |
Earth cup: 14% -> 0% |
| 2025-02-22 | 211 -> 212 | 145.12 -> 129.46 |
Fire cup 2023: 29% -> 14% |