Tkachenko Maria

From Sarov, Russia

EMA: 15990422

Player page

Common russian riichi rating (CRR)

Rating date Sept. 12, 2026 (latest changes Sept. 7, 2026).

47 place (613.87).

max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41

p1 = (325.84 * 3.75 * 0.14 + 741.94 * 3.10 * 0.29 + 285.71 * 3.50 * 0.57 + 746.27 * 4.10 * 0.71 + 833.33 * 3 * 1 + 699.30 * 4.71 * 1) / (3.75 * 0.14 + 3.10 * 0.29 + 3.50 * 0.57 + 4.10 * 0.71 + 3 * 1 + 4.71 * 1) = 667.3058287384667

p2 = (699.30 * 4.71 * 1 + 833.33 * 3 * 1 + 746.27 * 4.10 * 0.71 + 741.94 * 3.10 * 0.29) / max_coefficients = 560.4386761842959

score = 667.3058287384667 * 0.5 + 560.4386761842959 * 0.5 = 613.8722524613813

Rating changes

Show

all results
Date Place Points Reason
2026-09-07 44 -> 47 625.68 -> 613.87

Moscow Open Riichi Marathon: 43% -> 29%
2026-09-06 41 -> 44 625.68
2026-09-03 42 -> 41 619.28 -> 625.68

Riichi over The Volga 2025: 71% -> 57%
2026-09-02 43 -> 42 619.28
2026-09-01 45 -> 43 608.78 -> 619.28

SPB Riichi Open 2024: 14% -> 0%
2026-08-31 46 -> 45 607.84 -> 608.78
2026-08-15 42 -> 46 621.75 -> 607.84

13 bloody tiles: 86% -> 71%
2026-08-13 45 -> 42 616.70 -> 621.75

Moscow Riichi 2024: 29% -> 14%
2026-08-04 48 -> 45 616.70
2026-08-02 47 -> 48 616.70

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 699 2026-06-14 44/144 100% 4.71 RR XII Russian Championship Samara
2 833 2026-01-07 6/31 100% 3.00 RR Moscow Open Riichi Marathon 2026 Moscow
3 746 2025-06-15 18/68 71% 4.10 RR 13 bloody tiles Perm
4 286 2025-05-03 51/71 57% 3.50 RR Riichi over The Volga 2025 Samara
5 742 2025-01-07 9/32 29% 3.10 RR Moscow Open Riichi Marathon Moscow
6 326 2024-10-13 61/90 14% 3.75 RR Moscow Riichi 2024 Moscow
7 63 2024-09-01 90/96 0% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
8 981 2024-05-12 🥉 3/108 0% 4.60 RR X Russian Championship Perm
9 144 2022-06-12 96/112 0% 4.05 RR Moscow Riichi 2022 Moscow
10 979 2021-12-19 🥈 2/48 0% 3.10 RR Agari team tournament Moscow
11 709 2021-11-06 17/56 0% 3.30 RR Kirov Tournament Kirov
12 0 2019-07-21 36/36 0% 3.20 RR Moscow Open Riichi Marathon 2019 Moscow
13 193 2019-05-04 68/84 0% 4.20 EMA Haru Shanten 2019 Perm