Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Common russian riichi rating (CRR)

Rating date Dec. 19, 2023 (latest changes Dec. 19, 2023).

34 place (494.26).

max_coefficients = (4 * 1 + 3.75 * 1 + 4.20 * 0.86 + 2.90 * 1) = 14.249820000000001

p1 = (585.59 * 4.05 * 0.43 + 600 * 4.20 * 0.86 + 439.25 * 4 * 1 + 551.72 * 3.75 * 1 + 0) / (4.05 * 0.43 + 4.20 * 0.86 + 4 * 1 + 3.75 * 1 + 1) = 497.1265081838609

p2 = (600 * 4.20 * 0.86 + 551.72 * 3.75 * 1 + 439.25 * 4 * 1 + 585.59 * 4.05 * 0.43) / max_coefficients = 491.3991896037985

score = 497.1265081838609 * 0.5 + 491.3991896037985 * 0.5 = 494.2628488938297

Rating changes

Show

all results
Date Place Points Reason
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%
2023-09-20 32 -> 29 524.58
2023-09-06 30 -> 32 524.58
2023-09-03 35 -> 30 474.88 -> 524.58

SPB Riichi Open 2023: 0% -> 100%
2023-08-27 34 -> 35 474.88

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 86% 4.20 RR IX Russian Riichi Championship
4 586 2022-06-12 47/112 43% 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