Obukhova Aleksandra
From Samara, Russia
Common russian riichi rating (CRR)
Rating date April 20, 2026 (latest changes April 19, 2026).
89 place (472.12).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (438.20 * 3.75 * 0.43 + 685.71 * 3.50 * 1 + 600 * 1.50 * 1 + 618.18 * 3 * 1 + 0) / (3.75 * 0.43 + 3.50 * 1 + 1.50 * 1 + 3 * 1 + 1) = 552.343915718023
p2 = (685.71 * 3.50 * 1 + 618.18 * 3 * 1 + 600 * 1.50 * 1 + 438.20 * 3.75 * 0.43) / max_coefficients = 391.89632107023414
score = 552.343915718023 * 0.5 + 391.89632107023414 * 0.5 = 472.12011839412855
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-04-19 | 84 -> 89 | 472.12 | |
| 2026-04-16 | 83 -> 84 | 472.12 | |
| 2026-04-13 | 84 -> 83 | 477.23 -> 472.12 |
Moscow Riichi 2024: 57% -> 43% |
| 2026-04-04 | 86 -> 84 | 477.23 | |
| 2026-04-02 | 87 -> 86 | 477.23 | |
| 2026-03-21 | 88 -> 87 | 477.23 | |
| 2026-03-14 | 87 -> 88 | 477.23 | |
| 2026-03-02 | 91 -> 87 | 477.23 | |
| 2026-03-01 | 92 -> 91 | 477.23 | |
| 2026-02-27 | 93 -> 92 | 477.23 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 618 |
|
22/56 | 100% | 3.00 | RR | Riichi On Ice 2026 | Samara | |
| 2 | 600 |
|
9/21 | 100% | 1.50 | CRR | San-Biki Cup | Saratov | |
| 3 | 686 |
|
23/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 4 | 438 |
|
51/90 | 43% | 3.75 | RR | Moscow Riichi 2024 | Moscow |