Bykov Dmitriy
From Saint Petersburg, Russia
EMA: 15990236
Common russian riichi rating (CRR)
Rating date Sept. 1, 2025 (latest changes Sept. 1, 2025).
270 place (111.94).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (299.07 * 4 * 0.14 + 578.95 * 1.50 * 0.71 + 0 + 0 + 0) / (4 * 0.14 + 1.50 * 0.71 + 1 + 1 + 1) = 170.4181518613842
p2 = (578.95 * 1.50 * 0.71 + 299.07 * 4 * 0.14) / max_coefficients = 53.46351351351351
score = 170.4181518613842 * 0.5 + 53.46351351351351 * 0.5 = 111.94083268744885
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-01 | 270 | 111.24 -> 111.94 | |
| 2025-08-31 | 263 -> 270 | 111.24 | |
| 2025-08-26 | 264 -> 263 | 111.24 | |
| 2025-08-25 | 265 -> 264 | 111.24 | |
| 2025-08-04 | 265 | 110.98 -> 111.24 | |
| 2025-08-03 | 259 -> 265 | 110.98 | |
| 2025-08-02 | 258 -> 259 | 110.98 | |
| 2025-07-26 | 257 -> 258 | 110.98 | |
| 2025-07-25 | 250 -> 257 | 124.03 -> 110.98 |
Duplicate riichi mahjong tournament 2024: 86% -> 71% |
| 2025-07-13 | 248 -> 250 | 124.03 |