Ratnikova Anna
From Samara, Russia
EMA: 15990370
Common russian riichi rating (CRR)
Rating date April 12, 2024 (latest changes April 12, 2024).
59 place (443.49).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 3.05 * 1 + 2.90 * 1) = 13.700000000000001
p1 = (585.59 * 4.05 * 0.14 + 600 * 4.20 * 0.57 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 0) / (4.05 * 0.14 + 4.20 * 0.57 + 3.75 * 1 + 4 * 1 + 1) = 477.87443114602087
p2 = (551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 600 * 4.20 * 0.57 + 585.59 * 4.05 * 0.14) / max_coefficients = 409.1102189781021
score = 477.87443114602087 * 0.5 + 409.1102189781021 * 0.5 = 443.49232506206147
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-04-12 | 54 -> 59 | 458.38 -> 443.49 |
Moscow Riichi 2022: 29% -> 14% |
| 2024-03-30 | 50 -> 54 | 458.38 | |
| 2024-03-20 | 51 -> 50 | 458.38 | |
| 2024-03-10 | 42 -> 51 | 469.19 -> 458.38 | |
| 2024-03-06 | 41 -> 42 | 475.09 -> 469.19 |
IX Russian Riichi Championship: 71% -> 57% |
| 2024-02-25 | 37 -> 41 | 475.09 | |
| 2024-02-12 | 35 -> 37 | 489.59 -> 475.09 |
Moscow Riichi 2022: 43% -> 29% |
| 2024-01-06 | 34 -> 35 | 494.26 -> 489.59 |
IX Russian Riichi Championship: 86% -> 71% |
| 2023-12-12 | 31 -> 34 | 507.89 -> 494.26 |
Moscow Riichi 2022: 57% -> 43% |
| 2023-11-28 | 32 -> 31 | 507.89 |
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 | 57% | 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" |
| 6 | 455 |
|
7/12 | 0% | 1.10 | CRR | Mahjong tournament at the Intellectual Games Festival 2017 |