Ryazanov Aleksandr
From Samara, Russia
EMA: 15990057
Internal rating (RR)
Rating date June 15, 2025 (latest changes June 15, 2025).
103 place (394.54).
how we calculated rating score
max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266
p1 = (569.62 * 3.65 * 1 + 719.10 * 3.75 * 1 + 23.81 * 2.60 * 1 + 314.29 * 3.50 * 1 + 0) / (3.65 * 1 + 3.75 * 1 + 2.60 * 1 + 3.50 * 1 + 1) = 409.4924137931034
p2 = (719.10 * 3.75 * 1 + 569.62 * 3.65 * 1 + 314.29 * 3.50 * 1 + 23.81 * 2.60 * 1) / max_coefficients = 379.57994356458556
score = 409.4924137931034 * 0.5 + 379.57994356458556 * 0.5 = 394.5361786788445
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-06-15 | 98 -> 103 | 400.16 -> 394.54 | |
| 2025-06-11 | 100 -> 98 | 400.16 | |
| 2025-05-12 | 101 -> 100 | 392.05 -> 400.16 | |
| 2025-05-03 | 111 -> 101 | 354.18 -> 392.05 |
Riichi over The Volga 2025: 0% -> 100% |
| 2025-04-26 | 108 -> 111 | 354.18 | |
| 2025-04-11 | 107 -> 108 | 354.18 | |
| 2025-03-10 | 108 -> 107 | 354.18 | |
| 2025-03-03 | 109 -> 108 | 354.18 | |
| 2025-03-02 | 106 -> 109 | 354.18 | |
| 2025-02-16 | 103 -> 106 | 354.18 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 314 |
|
49/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara |
| 2 | 24 |
|
42/43 | 100% | 2.60 | RR | Riichi On Ice | Samara |
| 3 | 719 |
|
26/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow |
| 4 | 570 |
|
35/80 | 100% | 3.65 | RR | Riichi over Volga | Samara |
| 5 | 486 |
|
19/36 | 0% | 0.90 | EMA | Moscow Riichi 2011 | Moscow |