Obukhova Aleksandra
From Samara, Russia
Internal rating (RR)
Rating date May 3, 2025 (latest changes May 3, 2025).
127 place (324.78).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (438.20 * 3.75 * 1 + 685.71 * 3.50 * 1 + 0 + 0 + 0) / (3.75 * 1 + 3.50 * 1 + 1 + 1 + 1) = 394.46439024390247
p2 = (685.71 * 3.50 * 1 + 438.20 * 3.75 * 1) / max_coefficients = 255.0952681388013
score = 394.46439024390247 * 0.5 + 255.0952681388013 * 0.5 = 324.7798291913519
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-05-03 | 127 | 324.78 |
Riichi over The Volga 2025: 0% -> 100% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 686 |
|
23/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara |
| 2 | 438 |
|
51/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow |