Tkachenko Maria
From Sarov, Russia
EMA: 15990422
Common russian riichi rating (CRR)
Rating date July 11, 2026 (latest changes July 7, 2026).
45 place (616.70).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997
p1 = (63.16 * 3.85 * 0.14 + 325.84 * 3.75 * 0.29 + 741.94 * 3.10 * 0.43 + 285.71 * 3.50 * 0.71 + 746.27 * 4.10 * 0.86 + 833.33 * 3 * 1 + 699.30 * 4.71 * 1) / (3.85 * 0.14 + 3.75 * 0.29 + 3.10 * 0.43 + 3.50 * 0.71 + 4.10 * 0.86 + 3 * 1 + 4.71 * 1) = 629.7159231298833
p2 = (699.30 * 4.71 * 1 + 746.27 * 4.10 * 0.86 + 833.33 * 3 * 1 + 741.94 * 3.10 * 0.43) / max_coefficients = 603.6916395222586
score = 629.7159231298833 * 0.5 + 603.6916395222586 * 0.5 = 616.703781326071
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-07-07 | 39 -> 45 | 628.70 -> 616.70 |
Moscow Open Riichi Marathon: 57% -> 43% |
| 2026-07-03 | 43 -> 39 | 623.78 -> 628.70 |
Riichi over The Volga 2025: 86% -> 71% |
| 2026-07-01 | 47 -> 43 | 615.31 -> 623.78 |
SPB Riichi Open 2024: 29% -> 14% |
| 2026-06-16 | 48 -> 47 | 615.31 | |
| 2026-06-15 | 43 -> 48 | 619.71 -> 615.31 |
13 bloody tiles: 100% -> 86% |
| 2026-06-14 | 61 -> 43 | 550.48 -> 619.71 |
XII Russian Championship: 0% -> 100% |
| 2026-06-13 | 61 | 545.80 -> 550.48 |
Moscow Riichi 2024: 43% -> 29% |
| 2026-06-09 | 62 -> 61 | 545.80 | |
| 2026-06-02 | 61 -> 62 | 545.80 | |
| 2026-05-17 | 62 -> 61 | 545.80 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 699 |
|
44/144 | 100% | 4.71 | RR | XII Russian Championship | Samara | |
| 2 | 833 |
|
6/31 | 100% | 3.00 | RR | Moscow Open Riichi Marathon 2026 | Moscow | |
| 3 | 746 |
|
18/68 | 86% | 4.10 | RR | 13 bloody tiles | Perm | |
| 4 | 286 |
|
51/71 | 71% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 5 | 742 |
|
9/32 | 43% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 6 | 326 |
|
61/90 | 29% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 7 | 63 |
|
90/96 | 14% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 8 | 981 |
|
🥉 | 3/108 | 0% | 4.60 | RR | X Russian Championship | Perm |
| 9 | 144 |
|
96/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
| 10 | 979 |
|
🥈 | 2/48 | 0% | 3.10 | RR | Agari team tournament | Moscow |
| 11 | 709 |
|
17/56 | 0% | 3.30 | RR | Kirov Tournament | Kirov | |
| 12 | 0 |
|
36/36 | 0% | 3.20 | RR | Moscow Open Riichi Marathon 2019 | Moscow | |
| 13 | 193 |
|
68/84 | 0% | 4.20 | EMA | Haru Shanten 2019 | Perm |