Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date May 20, 2025 (latest changes May 19, 2025).
259 place (60.65).
how we calculated rating score
max_coefficients = (4.60 * 0.86 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.19266
p1 = (485.98 * 4 * 0.29 + 21.74 * 2.10 * 0.86 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.29 + 2.10 * 0.86 + 3.85 * 1 + 1 + 1) = 76.83183000462883
p2 = (485.98 * 4 * 0.29 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.86) / max_coefficients = 44.46620934056314
score = 76.83183000462883 * 0.5 + 44.46620934056314 * 0.5 = 60.64901967259598
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 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 | |
| 2025-04-26 | 242 -> 245 | 80.98 | |
| 2025-04-22 | 240 -> 242 | 103.72 -> 80.98 |
Fire cup 2023: 14% -> 0% |
| 2025-04-13 | 237 -> 240 | 103.72 | |
| 2025-03-30 | 237 | 102.02 -> 103.72 |
Seihoku spring tournament 2024: 100% -> 86% |
| 2025-03-29 | 233 -> 237 | 102.02 |