Ratnikova Anna
From Samara, Russia
EMA: 15990370
Internal rating (RR)
Rating date Sept. 20, 2023 (latest changes Sept. 20, 2023).
23 place (524.58).
how we calculated rating score
max_coefficients = (4.20 * 1 + 4 * 1 + 3.75 * 1 + 4.05 * 0.71) = 14.842915
p1 = (585.59 * 4.05 * 0.71 + 600 * 4.20 * 1 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 0) / (4.05 * 0.71 + 4.20 * 1 + 3.75 * 1 + 4 * 1 + 1) = 507.4842603144687
p2 = (600 * 4.20 * 1 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 585.59 * 4.05 * 0.71) / max_coefficients = 541.6745969373267
score = 507.4842603144687 * 0.5 + 541.6745969373267 * 0.5 = 524.5794286258977
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-09-20 | 24 -> 23 | 524.58 | |
| 2023-09-03 | 27 -> 24 | 489.22 -> 524.58 |
SPB Riichi Open 2023: 0% -> 100% |
| 2023-08-19 | 29 -> 27 | 489.22 | |
| 2023-08-12 | 29 | 493.38 -> 489.22 |
Moscow Riichi 2022: 86% -> 71% |
| 2023-07-28 | 30 -> 29 | 493.38 | |
| 2023-07-20 | 30 | 484.51 -> 493.38 | |
| 2023-06-12 | 32 -> 30 | 488.61 -> 484.51 |
Moscow Riichi 2022: 100% -> 86% |
| 2023-06-11 | 42 -> 32 | 412.74 -> 488.61 |
Money can not buy tenpai: 0% -> 100% |
| 2023-05-28 | 43 -> 42 | 409.67 -> 412.74 | |
| 2023-05-20 | 45 -> 43 | 402.40 -> 409.67 |
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 | 100% | 4.20 | RR | IX Russian Riichi Championship |
| 4 | 586 |
|
47/112 | 71% | 4.05 | RR | Moscow Riichi 2022 |
| 5 | 198 |
|
74/92 | 0% | 3.80 | EMA | VII Russian Riichi Championship "Aki Shanten" |