Obukhova Aleksandra

From Samara, Russia

Player page

Internal rating (RR)

Rating date Sept. 4, 2026 (latest changes Sept. 3, 2026).

13 place (739.44).

max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41

p1 = (438.20 * 3.75 * 0.14 + 685.71 * 3.50 * 0.57 + 618.18 * 3 * 1 + 888.11 * 4.71 * 1 + 932.20 * 3.40 * 1) / (3.75 * 0.14 + 3.50 * 0.57 + 3 * 1 + 4.71 * 1 + 3.40 * 1) = 792.4232958553105

p2 = (888.11 * 4.71 * 1 + 932.20 * 3.40 * 1 + 618.18 * 3 * 1 + 685.71 * 3.50 * 0.57) / max_coefficients = 686.4639844256976

score = 792.4232958553105 * 0.5 + 686.4639844256976 * 0.5 = 739.443640140504

Rating changes

Show

all results
Date Place Points Reason
2026-09-03 10 -> 13 748.69 -> 739.44

Riichi over The Volga 2025: 71% -> 57%
2026-09-01 9 -> 10 748.69
2026-08-31 12 -> 9 747.54 -> 748.69
2026-08-16 45 -> 12 598.28 -> 747.54

Ufa Championship 2026: 0% -> 100%
2026-08-15 46 -> 45 596.39 -> 598.28
2026-08-13 46 598.65 -> 596.39

Moscow Riichi 2024: 29% -> 14%
2026-08-04 47 -> 46 598.65
2026-07-26 48 -> 47 598.65
2026-07-14 49 -> 48 598.65
2026-07-12 46 -> 49 598.65

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 932 2026-08-16 5/60 100% 3.40 RR Ufa Championship 2026 Ufa
2 888 2026-06-14 17/144 100% 4.71 RR XII Russian Championship Samara
3 618 2026-01-25 22/56 100% 3.00 RR Riichi On Ice 2026 Samara
4 686 2025-05-03 23/71 57% 3.50 RR Riichi over The Volga 2025 Samara
5 438 2024-10-13 51/90 14% 3.75 RR Moscow Riichi 2024 Moscow