Medvedev Sergei
From Moscow, Russia
Internal rating (RR)
Rating date Dec. 14, 2025 (latest changes Dec. 13, 2025).
173 place (234.43).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (370.79 * 3.75 * 0.71 + 516.13 * 3.10 * 1 + 0 + 0 + 0) / (3.75 * 0.71 + 3.10 * 1 + 1 + 1 + 1) = 295.3993364564496
p2 = (516.13 * 3.10 * 1 + 370.79 * 3.75 * 0.71) / max_coefficients = 173.4581939799331
score = 295.3993364564496 * 0.5 + 173.4581939799331 * 0.5 = 234.42876521819136
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-13 | 171 -> 173 | 243.24 -> 234.43 |
Moscow Riichi 2024: 86% -> 71% |
| 2025-12-07 | 166 -> 171 | 243.24 | |
| 2025-11-12 | 167 -> 166 | 243.24 | |
| 2025-11-04 | 161 -> 167 | 247.48 -> 243.24 | |
| 2025-11-01 | 162 -> 161 | 247.14 -> 247.48 | |
| 2025-10-13 | 159 -> 162 | 252.83 -> 247.14 |
Moscow Riichi 2024: 100% -> 86% |
| 2025-09-14 | 158 -> 159 | 252.83 | |
| 2025-09-12 | 160 -> 158 | 252.83 | |
| 2025-09-10 | 161 -> 160 | 252.83 | |
| 2025-09-03 | 164 -> 161 | 252.83 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 516 |
|
16/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 2 | 371 |
|
57/90 | 71% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 3 | 736 |
|
24/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 4 | 587 |
|
32/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 5 | 360 |
|
72/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |