Obukhova Aleksandra

From Samara, Russia

Player page

Internal rating (RR)

Rating date April 14, 2026 (latest changes April 13, 2026).

92 place (411.16).

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 + 618.18 * 3 * 1 + 0 + 0) / (3.75 * 0.43 + 3.50 * 1 + 3 * 1 + 1 + 1) = 490.6230675999901

p2 = (685.71 * 3.50 * 1 + 618.18 * 3 * 1 + 438.20 * 3.75 * 0.43) / max_coefficients = 331.69565217391306

score = 490.6230675999901 * 0.5 + 331.69565217391306 * 0.5 = 411.1593598869516

Rating changes

Show

all results
Date Place Points Reason
2026-04-13 90 -> 92 417.69 -> 411.16

Moscow Riichi 2024: 57% -> 43%
2026-04-05 91 -> 90 417.69
2026-04-04 93 -> 91 417.69
2026-03-14 94 -> 93 417.69
2026-03-12 96 -> 94 417.69
2026-03-10 98 -> 96 417.69
2026-03-07 99 -> 98 417.69
2026-03-02 100 -> 99 417.69
2026-03-01 99 -> 100 417.69
2026-02-23 92 -> 99 417.69

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 618 2026-01-25 22/56 100% 3.00 RR Riichi On Ice 2026 Samara
2 686 2025-05-03 23/71 100% 3.50 RR Riichi over The Volga 2025 Samara
3 438 2024-10-13 51/90 43% 3.75 RR Moscow Riichi 2024 Moscow