Mamin Vladislav
From Saint Petersburg, Russia
EMA: 15990329
Common russian riichi rating (CRR)
Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).
205 place (233.20).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (521.74 * 2.10 * 0.29 + 115.79 * 3.85 * 0.71 + 833.33 * 2 * 1 + 0 + 0) / (2.10 * 0.29 + 3.85 * 0.71 + 2 * 1 + 1 + 1) = 312.6696847969905
p2 = (833.33 * 2 * 1 + 115.79 * 3.85 * 0.71 + 521.74 * 2.10 * 0.29) / max_coefficients = 153.72107023411374
score = 312.6696847969905 * 0.5 + 153.72107023411374 * 0.5 = 233.19537751555214
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-07 | 199 -> 205 | 233.20 | |
| 2025-12-06 | 196 -> 199 | 233.20 | |
| 2025-11-30 | 196 | 242.53 -> 233.20 |
Seihoku spring tournament 2024: 43% -> 29% |
| 2025-11-22 | 194 -> 196 | 242.53 | |
| 2025-11-19 | 195 -> 194 | 242.53 | |
| 2025-11-12 | 196 -> 195 | 242.53 | |
| 2025-11-04 | 189 -> 196 | 246.26 -> 242.53 | |
| 2025-11-01 | 192 -> 189 | 241.31 -> 246.26 |
SPB Riichi Open 2024: 86% -> 71% |
| 2025-10-13 | 192 | 238.64 -> 241.31 | |
| 2025-10-09 | 193 -> 192 | 238.64 |