Medvedev Sergei
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date July 30, 2025 (latest changes July 30, 2025).
140 place (340.04).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.35
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 = 270.4729641693811
score = 409.6158741246322 * 0.5 + 270.4729641693811 * 0.5 = 340.0444191470067
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 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 | |
| 2025-06-15 | 130 -> 136 | 355.19 -> 351.04 | |
| 2025-06-14 | 128 -> 130 | 355.19 | |
| 2025-06-11 | 110 -> 128 | 397.88 -> 355.19 |
Money can not buy tenpai: 14% -> 0% |
| 2025-05-19 | 105 -> 110 | 410.85 -> 397.88 |
"Green Dragon" in the Secret Chamber: 100% -> 86% |
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 |