Ratnikova Anna
From Samara, Russia
EMA: 15990370
Internal rating (RR)
Rating date Jan. 6, 2024 (latest changes Jan. 6, 2024).
22 place (512.28).
how we calculated rating score
max_coefficients = (4 * 1 + 3.75 * 1 + 4.20 * 0.71 + 4.05 * 0.43) = 12.485890000000001
p1 = (585.59 * 4.05 * 0.43 + 600 * 4.20 * 0.71 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 0) / (4.05 * 0.43 + 4.20 * 0.71 + 3.75 * 1 + 4 * 1 + 1) = 492.5518449282917
p2 = (551.72 * 3.75 * 1 + 600 * 4.20 * 0.71 + 439.25 * 4 * 1 + 585.59 * 4.05 * 0.43) / max_coefficients = 532.0005221894473
score = 492.5518449282917 * 0.5 + 532.0005221894473 * 0.5 = 512.2761835588695
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 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% |
| 2023-11-28 | 23 -> 22 | 518.93 | |
| 2023-11-20 | 24 -> 23 | 518.93 | |
| 2023-11-06 | 23 -> 24 | 522.21 -> 518.93 |
IX Russian Riichi Championship: 100% -> 86% |
| 2023-10-12 | 23 | 524.58 -> 522.21 |
Moscow Riichi 2022: 71% -> 57% |
| 2023-09-20 | 24 -> 23 | 524.58 | |
| 2023-09-03 | 27 -> 24 | 489.22 -> 524.58 |
SPB Riichi Open 2023: 0% -> 100% |
| 2023-09-01 | 27 | 489.22 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | 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 | 43% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
| 5 | 198 |
|
74/92 | 0% | 3.80 | EMA | VII Russian Riichi Championship "Aki Shanten" | Perm |