Medvedev Sergei
From Moscow, Russia
Internal rating (RR)
Rating date Sept. 2, 2026 (latest changes Sept. 2, 2026).
94 place (437.72).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41
p1 = (370.79 * 3.75 * 0.14 + 516.13 * 3.10 * 0.43 + 766.67 * 3 * 1 + 489.51 * 4.71 * 1 + 0) / (3.75 * 0.14 + 3.10 * 0.43 + 3 * 1 + 4.71 * 1 + 1) = 519.1764933398963
p2 = (489.51 * 4.71 * 1 + 766.67 * 3 * 1 + 516.13 * 3.10 * 0.43 + 370.79 * 3.75 * 0.14) / max_coefficients = 356.2654120700844
score = 519.1764933398963 * 0.5 + 356.2654120700844 * 0.5 = 437.72095270499034
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-09-02 | 95 -> 94 | 437.72 | |
| 2026-09-01 | 97 -> 95 | 437.72 | |
| 2026-08-31 | 96 -> 97 | 437.14 -> 437.72 | |
| 2026-08-26 | 97 -> 96 | 437.14 | |
| 2026-08-16 | 94 -> 97 | 437.14 | |
| 2026-08-15 | 95 -> 94 | 435.84 -> 437.14 | |
| 2026-08-13 | 94 -> 95 | 438.64 -> 435.84 |
Moscow Riichi 2024: 29% -> 14% |
| 2026-08-03 | 95 -> 94 | 438.64 | |
| 2026-07-25 | 93 -> 95 | 438.64 | |
| 2026-07-18 | 92 -> 93 | 438.64 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 490 |
|
74/144 | 100% | 4.71 | RR | XII Russian Championship | Samara | |
| 2 | 767 |
|
8/31 | 100% | 3.00 | RR | Moscow Open Riichi Marathon 2026 | Moscow | |
| 3 | 516 |
|
16/32 | 43% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 4 | 371 |
|
57/90 | 14% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 5 | 736 |
|
24/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 6 | 587 |
|
32/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 7 | 360 |
|
72/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |