Medvedev Sergei
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Aug. 31, 2025 (latest changes Aug. 31, 2025).
144 place (341.38).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (903.23 * 1.80 * 0.71 + 370.79 * 3.75 * 1 + 516.13 * 3.10 * 1 + 0 + 0) / (1.80 * 0.71 + 3.75 * 1 + 3.10 * 1 + 1 + 1) = 409.6158741246322
p2 = (516.13 * 3.10 * 1 + 370.79 * 3.75 * 1 + 903.23 * 1.80 * 0.71) / max_coefficients = 273.14210526315793
score = 409.6158741246322 * 0.5 + 273.14210526315793 * 0.5 = 341.37898969389505
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-31 | 141 -> 144 | 341.38 | |
| 2025-08-26 | 142 -> 141 | 341.38 | |
| 2025-08-04 | 142 | 340.04 -> 341.38 | |
| 2025-08-03 | 140 -> 142 | 340.04 | |
| 2025-07-30 | 141 -> 140 | 340.04 | |
| 2025-07-19 | 137 -> 141 | 353.71 -> 340.04 |
"Green Dragon" in the Secret Chamber: 86% -> 71% |
| 2025-07-13 | 134 -> 137 | 353.71 | |
| 2025-07-12 | 134 | 351.04 -> 353.71 | |
| 2025-07-10 | 135 -> 134 | 351.04 | |
| 2025-07-05 | 136 -> 135 | 351.04 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 516 |
|
16/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 2 | 371 |
|
57/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 3 | 903 |
|
4/32 | 71% | 1.80 | CRR | "Green Dragon" in the Secret Chamber | Korolyov | |
| 4 | 736 |
|
24/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 5 | 587 |
|
32/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 6 | 360 |
|
72/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |