Medvedev Sergei
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Jan. 28, 2026 (latest changes Jan. 26, 2026).
96 place (431.90).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (903.23 * 1.80 * 0.29 + 370.79 * 3.75 * 0.71 + 516.13 * 3.10 * 0.86 + 766.67 * 3 * 1 + 0) / (1.80 * 0.29 + 3.75 * 0.71 + 3.10 * 0.86 + 3 * 1 + 1) = 520.7212868766621
p2 = (766.67 * 3 * 1 + 516.13 * 3.10 * 0.86 + 370.79 * 3.75 * 0.71 + 903.23 * 1.80 * 0.29) / max_coefficients = 343.0802675585284
score = 520.7212868766621 * 0.5 + 343.0802675585284 * 0.5 = 431.9007772175953
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-01-25 | 94 -> 96 | 431.90 | |
| 2026-01-19 | 91 -> 94 | 444.54 -> 431.90 |
"Green Dragon" in the Secret Chamber: 43% -> 29% |
| 2026-01-14 | 92 -> 91 | 444.54 | |
| 2026-01-12 | 94 -> 92 | 444.54 | |
| 2026-01-07 | 167 -> 94 | 302.43 -> 444.54 |
Moscow Open Riichi Marathon 2026: 0% -> 100% Moscow Open Riichi Marathon: 100% -> 86% |
| 2026-01-03 | 166 -> 167 | 302.43 | |
| 2025-12-27 | 163 -> 166 | 302.43 | |
| 2025-12-25 | 164 -> 163 | 302.43 | |
| 2025-12-13 | 162 -> 164 | 308.66 -> 302.43 |
Moscow Riichi 2024: 86% -> 71% |
| 2025-12-07 | 156 -> 162 | 308.66 |
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 | 86% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 3 | 371 |
|
57/90 | 71% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 4 | 903 |
|
4/32 | 29% | 1.80 | CRR | "Green Dragon" in the Secret Chamber | Korolyov | |
| 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 |