Ratnikova Anna
From Samara, Russia
EMA: 15990370
Internal rating (RR)
Rating date May 6, 2024 (latest changes May 6, 2024).
36 place (438.94).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 3.05 * 1 + 2.10 * 1) = 12.9
p1 = (585.59 * 4.05 * 0.14 + 600 * 4.20 * 0.43 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 0) / (4.05 * 0.14 + 4.20 * 0.43 + 3.75 * 1 + 4 * 1 + 1) = 471.29244536617165
p2 = (551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 600 * 4.20 * 0.43 + 585.59 * 4.05 * 0.14) / max_coefficients = 406.5852713178294
score = 471.29244536617165 * 0.5 + 406.5852713178294 * 0.5 = 438.9388583420005
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-05-06 | 36 | 451.24 -> 438.94 |
IX Russian Riichi Championship: 57% -> 43% |
| 2024-04-12 | 36 | 466.60 -> 451.24 |
Moscow Riichi 2022: 29% -> 14% |
| 2024-03-30 | 33 -> 36 | 466.60 | |
| 2024-03-20 | 34 -> 33 | 466.60 | |
| 2024-03-10 | 25 -> 34 | 504.29 -> 466.60 | |
| 2024-03-06 | 24 -> 25 | 508.89 -> 504.29 |
IX Russian Riichi Championship: 71% -> 57% |
| 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% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 439 |
|
61/108 | 100% | 4.00 | RR | SPB Riichi Open 2023 |
| 2 | 552 |
|
40/88 | 100% | 3.75 | RR | Money can not buy tenpai |
| 3 | 600 |
|
31/76 | 43% | 4.20 | RR | IX Russian Riichi Championship |
| 4 | 586 |
|
47/112 | 14% | 4.05 | RR | Moscow Riichi 2022 |
| 5 | 198 |
|
74/92 | 0% | 3.80 | EMA | VII Russian Riichi Championship "Aki Shanten" |