Medvedev Sergei
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Sept. 3, 2025 (latest changes Sept. 3, 2025).
140 place (345.07).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
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 = 280.5243243243243
score = 409.6158741246322 * 0.5 + 280.5243243243243 * 0.5 = 345.07009922447827
Rating changes
Date | Place | Points | Reason |
---|---|---|---|
2025-09-03 | 142 -> 140 | 345.07 | |
2025-09-01 | 144 -> 142 | 341.38 -> 345.07 | |
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 |
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 |