Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Common russian riichi rating (CRR)

Rating date June 15, 2025 (latest changes June 15, 2025).

24 place (689.77).

max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266

p1 = (439.25 * 4 * 0.29 + 644.86 * 4.60 * 0.86 + 329.11 * 3.65 * 1 + 821.05 * 3.85 * 1 + 833.33 * 2.60 * 1 + 885.71 * 3.50 * 1) / (4 * 0.29 + 4.60 * 0.86 + 3.65 * 1 + 3.85 * 1 + 2.60 * 1 + 3.50 * 1) = 678.2508966865146

p2 = (821.05 * 3.85 * 1 + 885.71 * 3.50 * 1 + 644.86 * 4.60 * 0.86 + 833.33 * 2.60 * 1) / max_coefficients = 701.2988839494051

score = 678.2508966865146 * 0.5 + 701.2988839494051 * 0.5 = 689.7748903179598

Rating changes

Show

all results
Date Place Points Reason
2025-06-15 18 -> 24 700.16 -> 689.77
2025-06-11 20 -> 18 698.40 -> 700.16

Money can not buy tenpai: 14% -> 0%
2025-06-08 19 -> 20 698.40
2025-05-12 18 -> 19 696.30 -> 698.40

X Russian Championship: 100% -> 86%
2025-05-03 37 -> 18 610.57 -> 696.30

SPB Riichi Open 2023: 43% -> 29%

Riichi over The Volga 2025: 0% -> 100%
2025-04-26 36 -> 37 610.57
2025-04-11 37 -> 36 609.49 -> 610.57

Money can not buy tenpai: 29% -> 14%
2025-03-10 38 -> 37 609.49
2025-03-03 41 -> 38 606.63 -> 609.49

SPB Riichi Open 2023: 57% -> 43%
2025-02-16 38 -> 41 606.63

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 886 2025-05-03 9/71 100% 3.50 RR Riichi over The Volga 2025 Samara
2 833 2025-01-26 8/43 100% 2.60 RR Riichi On Ice Samara
3 821 2024-09-01 18/96 100% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
4 329 2024-08-04 54/80 100% 3.65 RR Riichi over Volga Samara
5 645 2024-05-12 39/108 86% 4.60 RR X Russian Championship Perm
6 439 2023-09-03 61/108 29% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
7 552 2023-06-11 40/88 0% 3.75 RR Money can not buy tenpai Perm
8 600 2022-11-06 31/76 0% 4.20 RR IX Russian Riichi Championship Perm
9 586 2022-06-12 47/112 0% 4.05 RR Moscow Riichi 2022 Moscow
10 198 2018-11-18 74/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten" Perm
11 455 2017-02-26 7/12 0% 1.10 CRR Mahjong tournament at the Intellectual Games Festival 2017 Samara