Obukhova Aleksandra

From Samara, Russia

Player page

Internal rating (RR)

Rating date Oct. 13, 2025 (latest changes Oct. 13, 2025).

125 place (328.73).

max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.85 * 0.86) = 14.349835

p1 = (438.20 * 3.75 * 0.86 + 685.71 * 3.50 * 1 + 0 + 0 + 0) / (3.75 * 0.86 + 3.50 * 1 + 1 + 1 + 1) = 392.0517802684236

p2 = (685.71 * 3.50 * 1 + 438.20 * 3.75 * 0.86) / max_coefficients = 265.399567312098

score = 392.0517802684236 * 0.5 + 265.399567312098 * 0.5 = 328.72567379026077

Rating changes

Show

all results
Date Place Points Reason
2025-10-13 121 -> 125 333.83 -> 328.73

Moscow Riichi 2024: 100% -> 86%
2025-10-09 122 -> 121 333.83
2025-10-04 124 -> 122 333.83
2025-09-12 126 -> 124 333.83
2025-09-03 130 -> 126 333.83
2025-09-01 131 -> 130 330.23 -> 333.83
2025-08-09 132 -> 131 330.23
2025-08-04 132 328.93 -> 330.23
2025-08-03 129 -> 132 328.93
2025-07-13 125 -> 129 328.93

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 686 2025-05-03 23/71 100% 3.50 RR Riichi over The Volga 2025 Samara
2 438 2024-10-13 51/90 86% 3.75 RR Moscow Riichi 2024 Moscow