Obukhova Aleksandra

From Samara, Russia

Player page

Internal rating (RR)

Rating date Jan. 29, 2026 (latest changes Jan. 26, 2026).

95 place (424.35).

max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95

p1 = (438.20 * 3.75 * 0.71 + 685.71 * 3.50 * 1 + 618.18 * 3 * 1 + 0 + 0) / (3.75 * 0.71 + 3.50 * 1 + 3 * 1 + 1 + 1) = 485.59907859866485

p2 = (685.71 * 3.50 * 1 + 618.18 * 3 * 1 + 438.20 * 3.75 * 0.71) / max_coefficients = 363.0989966555184

score = 485.59907859866485 * 0.5 + 363.0989966555184 * 0.5 = 424.34903762709166

Rating changes

Show

all results
Date Place Points Reason
2026-01-25 135 -> 95 314.20 -> 424.35

Riichi On Ice 2026: 0% -> 100%
2026-01-14 136 -> 135 314.20
2026-01-12 137 -> 136 314.20
2026-01-10 136 -> 137 314.20
2026-01-07 131 -> 136 314.20
2025-12-13 127 -> 131 323.40 -> 314.20

Moscow Riichi 2024: 86% -> 71%
2025-12-07 125 -> 127 323.40
2025-12-04 126 -> 125 323.40
2025-11-30 125 -> 126 323.40
2025-11-14 126 -> 125 323.40

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 71% 3.75 RR Moscow Riichi 2024 Moscow