Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date June 19, 2025 (latest changes June 15, 2025).
270 place (60.77).
how we calculated rating score
max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266
p1 = (485.98 * 4 * 0.29 + 21.74 * 2.10 * 0.71 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.29 + 2.10 * 0.71 + 3.85 * 1 + 1 + 1) = 78.77703898464941
p2 = (485.98 * 4 * 0.29 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.71) / max_coefficients = 42.77021938723976
score = 78.77703898464941 * 0.5 + 42.77021938723976 * 0.5 = 60.773629185944586
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-06-15 | 261 -> 270 | 61.41 -> 60.77 | |
| 2025-06-14 | 256 -> 261 | 61.41 | |
| 2025-06-11 | 261 -> 256 | 61.41 | |
| 2025-06-08 | 259 -> 261 | 61.41 | |
| 2025-05-30 | 259 | 60.65 -> 61.41 |
Seihoku spring tournament 2024: 86% -> 71% |
| 2025-05-17 | 256 -> 259 | 60.65 | |
| 2025-05-12 | 256 | 59.73 -> 60.65 | |
| 2025-05-03 | 248 -> 256 | 80.98 -> 59.73 |
SPB Riichi Open 2023: 43% -> 29% |
| 2025-05-01 | 250 -> 248 | 80.98 | |
| 2025-04-27 | 245 -> 250 | 80.98 |