Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date Jan. 31, 2026 (latest changes Jan. 30, 2026).
312 place (5.09).
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 * 0.57 + 0 * 3.45 * 1 + 0 + 0) / (2.10 * 0.14 + 3.85 * 0.57 + 3.45 * 1 + 1 + 1) = 6.645299736603111
p2 = (21.05 * 3.85 * 0.57 + 21.74 * 2.10 * 0.14 + 0 * 3.45 * 1) / max_coefficients = 3.533779264214047
score = 6.645299736603111 * 0.5 + 3.533779264214047 * 0.5 = 5.089539500408579
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-01-30 | 312 | 5.58 -> 5.09 |
Seihoku spring tournament 2024: 29% -> 14% |
| 2026-01-25 | 307 -> 312 | 5.58 | |
| 2026-01-07 | 305 -> 307 | 5.58 | |
| 2026-01-03 | 301 -> 305 | 5.58 | |
| 2026-01-01 | 301 | 6.40 -> 5.58 |
SPB Riichi Open 2024: 71% -> 57% |
| 2025-12-27 | 296 -> 301 | 6.40 | |
| 2025-12-07 | 293 -> 296 | 6.40 | |
| 2025-12-06 | 288 -> 293 | 6.40 | |
| 2025-11-30 | 287 -> 288 | 6.85 -> 6.40 |
Seihoku spring tournament 2024: 43% -> 29% |
| 2025-11-25 | 288 -> 287 | 6.85 |