Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Internal rating (RR)

Rating date July 20, 2023 (latest changes July 20, 2023).

31 place (493.38).

max_coefficients = (4.20 * 1 + 3.75 * 1 + 4.05 * 0.86 + 3.50 * 0.57) = 13.421155

p1 = (585.59 * 4.05 * 0.86 + 600 * 4.20 * 1 + 551.72 * 3.75 * 1 + 0 + 0) / (4.05 * 0.86 + 4.20 * 1 + 3.75 * 1 + 1 + 1) = 493.3733842326966

p2 = (600 * 4.20 * 1 + 551.72 * 3.75 * 1 + 585.59 * 4.05 * 0.86) / max_coefficients = 493.3770603200693

score = 493.3733842326966 * 0.5 + 493.3770603200693 * 0.5 = 493.37522227638294

Rating changes

Show

all results
Date Place Points Reason
2023-07-20 31 484.51 -> 493.38
2023-06-12 33 -> 31 488.61 -> 484.51

Moscow Riichi 2022: 100% -> 86%
2023-06-11 43 -> 33 412.74 -> 488.61

Money can not buy tenpai: 0% -> 100%
2023-05-28 44 -> 43 409.67 -> 412.74
2023-05-20 46 -> 44 402.40 -> 409.67
2023-04-19 47 -> 46 399.06 -> 402.40
2023-03-28 50 -> 47 395.75 -> 399.06
2023-03-20 50 389.47 -> 395.75
2023-03-06 52 -> 50 389.47
2023-02-19 54 -> 52 387.17 -> 389.47

Tournaments

# Base rank Date Place Power Coefficient Type Tournament
1 552 2023-06-11 40/88 100% 3.75 RR Money can not buy tenpai
2 600 2022-11-06 31/76 100% 4.20 RR IX Russian Riichi Championship
3 586 2022-06-12 47/112 86% 4.05 RR Moscow Riichi 2022
4 198 2018-11-18 74/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten"