Obukhova Aleksandra

From Samara, Russia

Player page

Common russian riichi rating (CRR)

Rating date July 21, 2026 (latest changes July 18, 2026).

36 place (634.59).

max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997

p1 = (438.20 * 3.75 * 0.29 + 685.71 * 3.50 * 0.71 + 600 * 1.50 * 1 + 618.18 * 3 * 1 + 888.11 * 4.71 * 1) / (3.75 * 0.29 + 3.50 * 0.71 + 1.50 * 1 + 3 * 1 + 4.71 * 1) = 713.6418670062218

p2 = (888.11 * 4.71 * 1 + 618.18 * 3 * 1 + 685.71 * 3.50 * 0.71 + 600 * 1.50 * 1) / max_coefficients = 555.5296578745111

score = 713.6418670062218 * 0.5 + 555.5296578745111 * 0.5 = 634.5857624403665

Rating changes

Show

all results
Date Place Points Reason
2026-07-14 37 -> 36 634.59
2026-07-12 36 -> 37 634.59
2026-07-03 34 -> 36 645.06 -> 634.59

Riichi over The Volga 2025: 86% -> 71%
2026-06-15 35 -> 34 634.59 -> 645.06
2026-06-14 91 -> 35 453.70 -> 634.59

XII Russian Championship: 0% -> 100%
2026-06-13 88 -> 91 458.59 -> 453.70

Moscow Riichi 2024: 43% -> 29%
2026-06-09 89 -> 88 458.59
2026-06-04 91 -> 89 458.59
2026-06-02 90 -> 91 458.59
2026-05-31 91 -> 90 458.59

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 888 2026-06-14 17/144 100% 4.71 RR XII Russian Championship Samara
2 618 2026-01-25 22/56 100% 3.00 RR Riichi On Ice 2026 Samara
3 600 2025-11-22 9/21 100% 1.50 CRR San-Biki Cup Saratov
4 686 2025-05-03 23/71 71% 3.50 RR Riichi over The Volga 2025 Samara
5 438 2024-10-13 51/90 29% 3.75 RR Moscow Riichi 2024 Moscow