Medvedev Sergei
From Moscow, Russia
Internal rating (RR)
Rating date Aug. 11, 2025 (latest changes Aug. 9, 2025).
160 place (250.17).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (370.79 * 3.75 * 1 + 516.13 * 3.10 * 1 + 0 + 0 + 0) / (3.75 * 1 + 3.10 * 1 + 1 + 1 + 1) = 303.5989847715736
p2 = (516.13 * 3.10 * 1 + 370.79 * 3.75 * 1) / max_coefficients = 196.74013157894737
score = 303.5989847715736 * 0.5 + 196.74013157894737 * 0.5 = 250.16955817526048
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-04 | 160 | 249.21 -> 250.17 | |
| 2025-08-03 | 154 -> 160 | 249.21 | |
| 2025-07-30 | 156 -> 154 | 249.21 | |
| 2025-07-14 | 157 -> 156 | 249.21 | |
| 2025-07-13 | 155 -> 157 | 249.21 | |
| 2025-07-12 | 156 -> 155 | 247.39 -> 249.21 | |
| 2025-07-10 | 157 -> 156 | 247.39 | |
| 2025-07-03 | 159 -> 157 | 247.39 | |
| 2025-06-15 | 146 -> 159 | 250.22 -> 247.39 | |
| 2025-06-11 | 136 -> 146 | 291.70 -> 250.22 |
Money can not buy tenpai: 14% -> 0% |
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 | 736 |
|
24/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 4 | 587 |
|
32/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 5 | 360 |
|
72/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |