Obukhova Aleksandra
From Samara, Russia
Common russian riichi rating (CRR)
Rating date Oct. 13, 2026 (latest changes Oct. 13, 2026).
19 place (706.79).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41
p1 = (685.71 * 3.50 * 0.57 + 600 * 1.50 * 1 + 618.18 * 3 * 1 + 888.11 * 4.71 * 1 + 932.20 * 3.40 * 1 + 436.62 * 3.40 * 1) / (3.50 * 0.57 + 1.50 * 1 + 3 * 1 + 4.71 * 1 + 3.40 * 1 + 3.40 * 1) = 719.7663507293211
p2 = (888.11 * 4.71 * 1 + 932.20 * 3.40 * 1 + 618.18 * 3 * 1 + 436.62 * 3.40 * 1) / max_coefficients = 693.8066190785204
score = 719.7663507293211 * 0.5 + 693.8066190785204 * 0.5 = 706.7864849039207
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-10-13 | 22 -> 19 | 702.72 -> 706.79 |
Moscow Riichi 2024: 14% -> 0% |
| 2026-10-03 | 23 -> 22 | 702.72 | |
| 2026-10-01 | 22 -> 23 | 702.72 | |
| 2026-09-26 | 21 -> 22 | 702.72 | |
| 2026-09-06 | 14 -> 21 | 729.92 -> 702.72 |
Sunset Wolf Cup 2026: 0% -> 100% |
| 2026-09-03 | 13 -> 14 | 739.64 -> 729.92 |
Riichi over The Volga 2025: 71% -> 57% |
| 2026-08-31 | 13 | 738.50 -> 739.64 | |
| 2026-08-16 | 34 -> 13 | 642.66 -> 738.50 |
Ufa Championship 2026: 0% -> 100% |
| 2026-08-15 | 34 | 640.61 -> 642.66 | |
| 2026-08-13 | 36 -> 34 | 634.59 -> 640.61 |
Moscow Riichi 2024: 29% -> 14% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 437 |
|
41/72 | 100% | 3.40 | RR | Sunset Wolf Cup 2026 | Saint Petersburg | |
| 2 | 932 |
|
5/60 | 100% | 3.40 | RR | Ufa Championship 2026 | Ufa | |
| 3 | 888 |
|
17/144 | 100% | 4.71 | RR | XII Russian Championship | Samara | |
| 4 | 618 |
|
22/56 | 100% | 3.00 | RR | Riichi On Ice 2026 | Samara | |
| 5 | 600 |
|
9/21 | 100% | 1.50 | CRR | San-Biki Cup | Saratov | |
| 6 | 686 |
|
23/71 | 57% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 7 | 438 |
|
51/90 | 0% | 3.75 | RR | Moscow Riichi 2024 | Moscow |