Ratnikova Anna
From Samara, Russia
EMA: 15990370
Common russian riichi rating (CRR)
Rating date Feb. 25, 2024 (latest changes Feb. 25, 2024).
42 place (475.09).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 4.20 * 0.71 + 2.90 * 1) = 13.650060000000002
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 = 461.79943531383736
score = 488.37988571446283 * 0.5 + 461.79943531383736 * 0.5 = 475.08966051415007
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-02-25 | 38 -> 42 | 475.09 | |
| 2024-02-12 | 36 -> 38 | 489.59 -> 475.09 |
Moscow Riichi 2022: 43% -> 29% |
| 2024-01-06 | 35 -> 36 | 494.26 -> 489.59 |
IX Russian Riichi Championship: 86% -> 71% |
| 2023-12-12 | 32 -> 35 | 507.89 -> 494.26 |
Moscow Riichi 2022: 57% -> 43% |
| 2023-11-28 | 33 -> 32 | 507.89 | |
| 2023-11-26 | 33 | 509.71 -> 507.89 | |
| 2023-11-06 | 35 -> 33 | 513.32 -> 509.71 |
IX Russian Riichi Championship: 100% -> 86% |
| 2023-10-22 | 33 -> 35 | 513.32 | |
| 2023-10-12 | 30 -> 33 | 524.58 -> 513.32 |
Moscow Riichi 2022: 71% -> 57% |
| 2023-09-20 | 33 -> 30 | 524.58 |
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 | 71% | 4.20 | RR | IX Russian Riichi Championship |
| 4 | 586 |
|
47/112 | 29% | 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 |