Medvedev Sergei
From Moscow, Russia
Internal rating (RR)
Rating date July 1, 2026 (latest changes July 1, 2026).
92 place (446.06).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997
p1 = (370.79 * 3.75 * 0.29 + 516.13 * 3.10 * 0.57 + 766.67 * 3 * 1 + 489.51 * 4.71 * 1 + 0) / (3.75 * 0.29 + 3.10 * 0.57 + 3 * 1 + 4.71 * 1 + 1) = 512.1809029306098
p2 = (489.51 * 4.71 * 1 + 766.67 * 3 * 1 + 516.13 * 3.10 * 0.57 + 370.79 * 3.75 * 0.29) / max_coefficients = 379.9305385668909
score = 512.1809029306098 * 0.5 + 379.9305385668909 * 0.5 = 446.05572074875033
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-07-01 | 93 -> 92 | 446.06 | |
| 2026-06-26 | 94 -> 93 | 446.06 | |
| 2026-06-16 | 96 -> 94 | 446.06 | |
| 2026-06-15 | 95 -> 96 | 439.17 -> 446.06 | |
| 2026-06-14 | 110 -> 95 | 351.84 -> 439.17 |
XII Russian Championship: 0% -> 100% |
| 2026-06-13 | 109 -> 110 | 355.67 -> 351.84 |
Moscow Riichi 2024: 43% -> 29% |
| 2026-06-09 | 112 -> 109 | 355.67 | |
| 2026-06-04 | 113 -> 112 | 355.67 | |
| 2026-05-26 | 115 -> 113 | 355.67 | |
| 2026-05-17 | 113 -> 115 | 355.67 |
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 | 57% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 4 | 371 |
|
57/90 | 29% | 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 |