Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Internal rating (RR)

Rating date April 12, 2024 (latest changes April 12, 2024).

36 place (451.24).

max_coefficients = (4 * 1 + 3.75 * 1 + 3.05 * 1 + 4.20 * 0.57) = 13.19988

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 = 424.6106782788934

score = 477.87443114602087 * 0.5 + 424.6106782788934 * 0.5 = 451.24255471245715

Rating changes

Show

Date Place Points Reason
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%

2023-11-28 23 -> 22 518.93

Tournaments

# Base rank Date Place Power Coefficient Type Tournament
1 439 2023-09-03 61/108 100% 4.00 RR SPB Riichi Open 2023
2 552 2023-06-11 40/88 100% 3.75 RR Money can not buy tenpai
3 600 2022-11-06 31/76 57% 4.20 RR IX Russian Riichi Championship
4 586 2022-06-12 47/112 14% 4.05 RR Moscow Riichi 2022
5 198 2018-11-18 74/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten"