Medvedev Sergei
From Moscow, Russia
Internal rating (RR)
Rating date May 20, 2026 (latest changes May 17, 2026).
115 place (355.67).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.45 * 1 + 3.40 * 1) = 14.85
p1 = (370.79 * 3.75 * 0.43 + 516.13 * 3.10 * 0.57 + 766.67 * 3 * 1 + 0 + 0) / (3.75 * 0.43 + 3.10 * 0.57 + 3 * 1 + 1 + 1) = 454.75312671941225
p2 = (766.67 * 3 * 1 + 516.13 * 3.10 * 0.57 + 370.79 * 3.75 * 0.43) / max_coefficients = 256.57845117845113
score = 454.75312671941225 * 0.5 + 256.57845117845113 * 0.5 = 355.66578894893166
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-05-17 | 113 -> 115 | 355.67 | |
| 2026-05-14 | 114 -> 113 | 355.67 | |
| 2026-05-12 | 117 -> 114 | 355.67 | |
| 2026-05-07 | 115 -> 117 | 364.91 -> 355.67 |
Moscow Open Riichi Marathon: 71% -> 57% |
| 2026-05-03 | 115 | 364.00 -> 364.91 | |
| 2026-05-01 | 116 -> 115 | 364.00 | |
| 2026-04-26 | 117 -> 116 | 364.00 | |
| 2026-04-19 | 116 -> 117 | 364.00 | |
| 2026-04-16 | 117 -> 116 | 364.00 | |
| 2026-04-13 | 114 -> 117 | 368.14 -> 364.00 |
Moscow Riichi 2024: 57% -> 43% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 767 |
|
8/31 | 100% | 3.00 | RR | Moscow Open Riichi Marathon 2026 | Moscow | |
| 2 | 516 |
|
16/32 | 57% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 3 | 371 |
|
57/90 | 43% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 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 |