Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Common russian riichi rating (CRR)

Rating date March 9, 2024 (latest changes March 9, 2024).

42 place (469.19).

max_coefficients = (4 * 1 + 3.75 * 1 + 2.90 * 1 + 4.20 * 0.57) = 13.04988

p1 = (585.59 * 4.05 * 0.29 + 600 * 4.20 * 0.57 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 0) / (4.05 * 0.29 + 4.20 * 0.57 + 3.75 * 1 + 4 * 1 + 1) = 482.9362885162995

p2 = (551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 600 * 4.20 * 0.57 + 585.59 * 4.05 * 0.29) / max_coefficients = 455.4432684438477

score = 482.9362885162995 * 0.5 + 455.4432684438477 * 0.5 = 469.18977848007364

Rating changes

Show

Date Place Points Reason
2024-03-06 41 -> 42 475.09 -> 469.19

IX Russian Riichi Championship: 71% -> 57%

2024-02-25 37 -> 41 475.09
2024-02-12 35 -> 37 489.59 -> 475.09

Moscow Riichi 2022: 43% -> 29%

2024-01-06 34 -> 35 494.26 -> 489.59

IX Russian Riichi Championship: 86% -> 71%

2023-12-12 31 -> 34 507.89 -> 494.26

Moscow Riichi 2022: 57% -> 43%

2023-11-28 32 -> 31 507.89
2023-11-26 32 509.71 -> 507.89
2023-11-06 34 -> 32 513.32 -> 509.71

IX Russian Riichi Championship: 100% -> 86%

2023-10-22 32 -> 34 513.32
2023-10-12 29 -> 32 524.58 -> 513.32

Moscow Riichi 2022: 71% -> 57%

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 29% 4.05 RR Moscow Riichi 2022
5 198 2018-11-18 74/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten"
6 455 2017-02-26 7/12 0% 1.10 CRR Mahjong tournament at the Intellectual Games Festival 2017