Bogatova Anna
From Samara, Russia
Internal rating (RR)
Rating date March 27, 2026 (latest changes March 26, 2026).
116 place (363.83).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (151.90 * 3.65 * 0.43 + 785.71 * 2.60 * 0.71 + 328.57 * 3.50 * 1 + 581.82 * 3 * 1 + 0) / (3.65 * 0.43 + 2.60 * 0.71 + 3.50 * 1 + 3 * 1 + 1) = 420.47892381772954
p2 = (581.82 * 3 * 1 + 785.71 * 2.60 * 0.71 + 328.57 * 3.50 * 1 + 151.90 * 3.65 * 0.43) / max_coefficients = 307.17658862876254
score = 420.47892381772954 * 0.5 + 307.17658862876254 * 0.5 = 363.82775622324607
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-03-26 | 112 -> 116 | 379.59 -> 363.83 |
Riichi On Ice: 86% -> 71% |
| 2026-03-12 | 113 -> 112 | 379.59 | |
| 2026-03-10 | 114 -> 113 | 379.59 | |
| 2026-03-02 | 115 -> 114 | 379.59 | |
| 2026-03-01 | 116 -> 115 | 379.59 | |
| 2026-02-23 | 111 -> 116 | 379.59 | |
| 2026-02-13 | 112 -> 111 | 379.59 | |
| 2026-02-08 | 108 -> 112 | 379.59 | |
| 2026-02-04 | 109 -> 108 | 376.05 -> 379.59 |
Riichi over Volga: 57% -> 43% |
| 2026-01-30 | 110 -> 109 | 376.05 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 582 |
|
24/56 | 100% | 3.00 | RR | Riichi On Ice 2026 | Samara | |
| 2 | 329 |
|
48/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 3 | 786 |
|
10/43 | 71% | 2.60 | RR | Riichi On Ice | Samara | |
| 4 | 152 |
|
68/80 | 43% | 3.65 | RR | Riichi over Volga | Samara |