Obukhova Aleksandra

From Samara, Russia

Player page

Common russian riichi rating (CRR)

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

143 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
2025-10-13 138 -> 143 333.83 -> 328.73

Moscow Riichi 2024: 100% -> 86%
2025-10-04 140 -> 138 333.83
2025-09-19 141 -> 140 333.83
2025-09-15 142 -> 141 333.83
2025-09-12 143 -> 142 333.83
2025-09-03 147 -> 143 333.83
2025-09-01 146 -> 147 330.23 -> 333.83
2025-08-26 147 -> 146 330.23
2025-08-09 148 -> 147 330.23
2025-08-04 148 328.93 -> 330.23

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