Ratnikova Anna
From Samara, Russia
EMA: 15990370
Internal rating (RR)
Rating date Feb. 12, 2024 (latest changes Feb. 12, 2024).
24 place (508.89).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 4.20 * 0.71 + 4.05 * 0.29) = 11.907145000000002
p1 = (585.59 * 4.05 * 0.29 + 600 * 4.20 * 0.71 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 0) / (4.05 * 0.29 + 4.20 * 0.71 + 3.75 * 1 + 4 * 1 + 1) = 488.37988571446283
p2 = (551.72 * 3.75 * 1 + 600 * 4.20 * 0.71 + 439.25 * 4 * 1 + 585.59 * 4.05 * 0.29) / max_coefficients = 529.3955855916761
score = 488.37988571446283 * 0.5 + 529.3955855916761 * 0.5 = 508.88773565306946
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-02-12 | 22 -> 24 | 512.28 -> 508.89 |
Moscow Riichi 2022: 43% -> 29% |
| 2024-01-06 | 22 | 516.12 -> 512.28 |
IX Russian Riichi Championship: 86% -> 71% |
| 2023-12-19 | 25 -> 22 | 516.12 | |
| 2023-12-12 | 22 -> 25 | 518.93 -> 516.12 |
Moscow Riichi 2022: 57% -> 43% |
| 2023-12-09 | 22 | 518.93 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 439 |
|
61/108 | 100% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 2 | 552 |
|
40/88 | 100% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 3 | 600 |
|
31/76 | 71% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 4 | 586 |
|
47/112 | 29% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
| 5 | 198 |
|
74/92 | 0% | 3.80 | EMA | VII Russian Riichi Championship "Aki Shanten" | Perm |