Obukhova Aleksandra
From Samara, Russia
Common russian riichi rating (CRR)
Rating date March 15, 2026 (latest changes March 15, 2026).
87 place (477.23).
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 * 0.57 + 685.71 * 3.50 * 1 + 600 * 1.50 * 1 + 618.18 * 3 * 1 + 0) / (3.75 * 0.57 + 3.50 * 1 + 1.50 * 1 + 3 * 1 + 1) = 546.8587197953827
p2 = (685.71 * 3.50 * 1 + 618.18 * 3 * 1 + 438.20 * 3.75 * 0.57 + 600 * 1.50 * 1) / max_coefficients = 407.5926421404683
score = 546.8587197953827 * 0.5 + 407.5926421404683 * 0.5 = 477.22568096792554
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-03-02 | 91 -> 87 | 477.23 | |
| 2026-03-01 | 92 -> 91 | 477.23 | |
| 2026-02-27 | 93 -> 92 | 477.23 | |
| 2026-02-23 | 86 -> 93 | 477.23 | |
| 2026-02-16 | 87 -> 86 | 477.23 | |
| 2026-02-13 | 85 -> 87 | 482.59 -> 477.23 |
Moscow Riichi 2024: 71% -> 57% |
| 2026-02-08 | 82 -> 85 | 482.59 | |
| 2026-02-04 | 83 -> 82 | 482.59 | |
| 2026-02-02 | 84 -> 83 | 482.59 | |
| 2026-01-26 | 85 -> 84 | 482.59 |
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 | 57% | 3.75 | RR | Moscow Riichi 2024 | Moscow |