Bogatova Anna
From Samara, Russia
Common russian riichi rating (CRR)
Rating date Aug. 30, 2025 (latest changes Aug. 27, 2025).
173 place (284.00).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (151.90 * 3.65 * 0.86 + 785.71 * 2.60 * 1 + 328.57 * 3.50 * 1 + 0 + 0) / (3.65 * 0.86 + 2.60 * 1 + 3.50 * 1 + 1 + 1) = 326.67656120654607
p2 = (785.71 * 2.60 * 1 + 328.57 * 3.50 * 1 + 151.90 * 3.65 * 0.86) / max_coefficients = 241.31973684210524
score = 326.67656120654607 * 0.5 + 241.31973684210524 * 0.5 = 283.99814902432564
Rating changes
Date | Place | Points | Reason |
---|---|---|---|
2025-08-26 | 175 -> 173 | 284.00 | |
2025-08-25 | 179 -> 175 | 284.00 | |
2025-08-04 | 179 | 281.52 -> 284.00 |
Riichi over Volga: 100% -> 86% |
2025-08-03 | 173 -> 179 | 281.52 | |
2025-07-26 | 171 -> 173 | 281.52 | |
2025-07-14 | 172 -> 171 | 281.52 | |
2025-07-13 | 169 -> 172 | 281.52 | |
2025-07-12 | 170 -> 169 | 279.24 -> 281.52 | |
2025-07-03 | 173 -> 170 | 279.24 | |
2025-06-15 | 166 -> 173 | 282.78 -> 279.24 |
Tournaments
# | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
---|---|---|---|---|---|---|---|---|---|
1 | 329 |
|
48/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
2 | 786 |
|
10/43 | 100% | 2.60 | RR | Riichi On Ice | Samara | |
3 | 152 |
|
68/80 | 86% | 3.65 | RR | Riichi over Volga | Samara |