Tkachenko Maria
From Sarov, Russia
EMA: 15990422
Internal rating (RR)
Rating date June 15, 2026 (latest changes June 15, 2026).
44 place (615.31).
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 * 0.29 + 325.84 * 3.75 * 0.29 + 741.94 * 3.10 * 0.57 + 285.71 * 3.50 * 0.86 + 746.27 * 4.10 * 0.86 + 833.33 * 3 * 1 + 699.30 * 4.71 * 1) / (3.85 * 0.29 + 3.75 * 0.29 + 3.10 * 0.57 + 3.50 * 0.86 + 4.10 * 0.86 + 3 * 1 + 4.71 * 1) = 605.8402718832672
p2 = (699.30 * 4.71 * 1 + 746.27 * 4.10 * 0.86 + 833.33 * 3 * 1 + 741.94 * 3.10 * 0.57) / max_coefficients = 624.780485048584
score = 605.8402718832672 * 0.5 + 624.780485048584 * 0.5 = 615.3103784659256
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-06-15 | 40 -> 44 | 619.71 -> 615.31 |
13 bloody tiles: 100% -> 86% |
| 2026-06-14 | 53 -> 40 | 550.48 -> 619.71 |
XII Russian Championship: 0% -> 100% |
| 2026-06-13 | 54 -> 53 | 545.80 -> 550.48 |
Moscow Riichi 2024: 43% -> 29% |
| 2026-05-12 | 53 -> 54 | 554.65 -> 545.80 |
X Russian Championship: 14% -> 0% |
| 2026-05-07 | 51 -> 53 | 567.88 -> 554.65 |
Moscow Open Riichi Marathon: 71% -> 57% |
| 2026-05-03 | 48 -> 51 | 566.10 -> 567.88 |
Riichi over The Volga 2025: 100% -> 86% |
| 2026-05-01 | 53 -> 48 | 557.54 -> 566.10 |
SPB Riichi Open 2024: 43% -> 29% |
| 2026-04-26 | 52 -> 53 | 557.54 | |
| 2026-04-16 | 51 -> 52 | 557.54 | |
| 2026-04-13 | 56 -> 51 | 553.81 -> 557.54 |
Moscow Riichi 2024: 57% -> 43% |
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 | 86% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 5 | 742 |
|
9/32 | 57% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 6 | 326 |
|
61/90 | 29% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 7 | 63 |
|
90/96 | 29% | 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 |