Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Internal rating (RR)

Rating date Aug. 31, 2025 (latest changes Aug. 31, 2025).

27 place (675.06).

max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2

p1 = (439.25 * 4 * 0.14 + 644.86 * 4.60 * 0.71 + 329.11 * 3.65 * 0.86 + 821.05 * 3.85 * 1 + 833.33 * 2.60 * 1 + 885.71 * 3.50 * 1 + 418.60 * 3 * 1) / (4 * 0.14 + 4.60 * 0.71 + 3.65 * 0.86 + 3.85 * 1 + 2.60 * 1 + 3.50 * 1 + 3 * 1) = 656.2607611083481

p2 = (821.05 * 3.85 * 1 + 885.71 * 3.50 * 1 + 833.33 * 2.60 * 1 + 644.86 * 4.60 * 0.71) / max_coefficients = 693.854605263158

score = 656.2607611083481 * 0.5 + 693.854605263158 * 0.5 = 675.057683185753

Rating changes

Show

all results
Date Place Points Reason
2025-08-31 26 -> 27 675.06
2025-08-09 27 -> 26 675.06
2025-08-04 30 -> 27 667.50 -> 675.06

Riichi over Volga: 100% -> 86%
2025-08-03 20 -> 30 687.20 -> 667.50

Two roosters and Chuckles: 0% -> 100%
2025-07-30 21 -> 20 687.20
2025-07-14 22 -> 21 687.20
2025-07-12 18 -> 22 693.54 -> 687.20

X Russian Championship: 86% -> 71%
2025-07-10 19 -> 18 693.54
2025-07-03 22 -> 19 689.77 -> 693.54

SPB Riichi Open 2023: 29% -> 14%
2025-06-15 18 -> 22 700.16 -> 689.77

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 419 2025-08-03 26/44 100% 3.00 RR Two roosters and Chuckles Kirov
2 886 2025-05-03 9/71 100% 3.50 RR Riichi over The Volga 2025 Samara
3 833 2025-01-26 8/43 100% 2.60 RR Riichi On Ice Samara
4 821 2024-09-01 18/96 100% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
5 329 2024-08-04 54/80 86% 3.65 RR Riichi over Volga Samara
6 645 2024-05-12 39/108 71% 4.60 RR X Russian Championship Perm
7 439 2023-09-03 61/108 14% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
8 552 2023-06-11 40/88 0% 3.75 RR Money can not buy tenpai Perm
9 600 2022-11-06 31/76 0% 4.20 RR IX Russian Riichi Championship Perm
10 586 2022-06-12 47/112 0% 4.05 RR Moscow Riichi 2022 Moscow
11 198 2018-11-18 74/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten" Perm