Petrushchenko Sergey
From Moscow, Russia
EMA: 15990288
Online rating
Rating date Jan. 8, 2026 (latest changes Jan. 2, 2026).
28 place (519.35).
how we calculated rating score
max_coefficients = (4.45 * 1 + 4.45 * 1 + 3.05 * 1) = 11.95
p1 = (1000 * 1.90 * 0.29 + 0 * 1.80 * 0.43 + 971.83 * 3.05 * 1 + 707.32 * 2.40 * 1 + 114.29 * 2.30 * 1) / (1.90 * 0.29 + 1.80 * 0.43 + 3.05 * 1 + 2.40 * 1 + 2.30 * 1) = 603.1711183752541
p2 = (971.83 * 3.05 * 1 + 707.32 * 2.40 * 1 + 1000 * 1.90 * 0.29) / max_coefficients = 435.5205020920502
score = 603.1711183752541 * 0.5 + 435.5205020920502 * 0.5 = 519.3458102336522
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-28 | 23 -> 28 | 536.48 -> 519.35 |
Wrong Chair: 43% -> 29% |
| 2025-12-22 | 24 -> 23 | 528.24 -> 536.48 |
Royale roulette: 57% -> 43% |
| 2025-12-16 | 27 -> 24 | 528.24 | |
| 2025-10-31 | 16 -> 27 | 575.69 -> 528.24 | |
| 2025-10-28 | 9 -> 16 | 594.91 -> 575.69 |
Wrong Chair: 57% -> 43% |
| 2025-10-25 | 7 -> 9 | 625.81 -> 594.91 |
Final Cup Qualifiers 2025: 0% -> 100% |
| 2025-10-22 | 7 | 616.03 -> 625.81 |
Royale roulette: 71% -> 57% |
| 2025-10-16 | 7 | 609.08 -> 616.03 | |
| 2025-08-28 | 7 | 627.66 -> 609.08 |
Wrong Chair: 71% -> 57% |
| 2025-08-22 | 7 | 618.56 -> 627.66 |
Royale roulette: 86% -> 71% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 114 |
|
32/36 | 100% | 2.30 | ONLINE | Final Cup Qualifiers 2025 | Russia | |
| 2 | 707 |
|
13/42 | 100% | 2.40 | ONLINE | Spring online tournament 2025 | Russia | |
| 3 | 972 |
|
🥉 | 3/72 | 100% | 3.05 | ONLINE | Winter online tournament 2025 | Russia |
| 4 | 0 |
|
16/16 | 43% | 1.80 | ONLINE | Royale roulette | Russia | |
| 5 | 1000 |
|
🥇 | 1/20 | 29% | 1.90 | ONLINE | Wrong Chair | Russia |
| 6 | 857 |
|
6/36 | 0% | 2.30 | ONLINE | Autumn Online Tournament | Russia | |
| 7 | 418 |
|
33/56 | 0% | 2.80 | ONLINE | Summer Online Tournament | Russia | |
| 8 | 0 |
|
40/40 | 0% | 2.40 | ONLINE | Winter Online Tournament | Russia | |
| 9 | 681 |
|
16/48 | 0% | 2.60 | ONLINE | Demons of autumn wind | Russia | |
| 10 | 770 |
|
21/88 | 0% | 3.25 | ONLINE | Winter Team Fight | Russia | |
| 11 | 783 |
|
6/24 | 0% | 2.00 | ONLINE | 5G Tournament | Russia | |
| 12 | 222 |
|
22/28 | 0% | 2.10 | ONLINE | Autumn Online Tournament | Russia | |
| 13 | 452 |
|
18/32 | 0% | 2.20 | ONLINE | I wish to have dora san... | Russia | |
| 14 | 884 |
|
6/44 | 0% | 2.50 | ONLINE | Summer Online Tournament | Russia | |
| 15 | 590 |
|
17/40 | 0% | 2.40 | ONLINE | Spring Online Tournament | Russia | |
| 16 | 735 |
|
23/84 | 0% | 3.20 | ONLINE | No Dora Tournament | Russia | |
| 17 | 731 |
|
19/68 | 0% | 3.00 | ONLINE | Winter Online Tournament | Russia | |
| 18 | 127 |
|
49/56 | 0% | 2.80 | ONLINE | Autumn Online Tournament | Russia | |
| 19 | 804 |
|
11/52 | 0% | 2.70 | ONLINE | Rainy season tournament［梅雨］ | Russia | |
| 20 | 915 |
|
7/72 | 0% | 3.05 | ONLINE | Summer Tournament | Russia | |
| 21 | 133 |
|
118/136 | 0% | 3.69 | ONLINE | Riichi Online Open Team Cup | Russia | |
| 22 | 159 |
|
91/108 | 0% | 3.50 | ONLINE | Spring tournament | Russia | |
| 23 | 568 |
|
61/140 | 0% | 3.70 | ONLINE | Corona go away | Russia | |
| 24 | 951 |
|
8/144 | 0% | 3.71 | ONLINE | Riichi Online Open Team Cup 2020 | Russia | |
| 25 | 782 |
|
13/56 | 0% | 2.80 | ONLINE | Summer Online Tournament | Russia | |
| 26 | 778 |
|
15/64 | 0% | 2.95 | ONLINE | Winter Online Tournament | Russia | |
| 27 | 322 |
|
41/60 | 0% | 2.90 | ONLINE | Summer online tournament 2018 | Russia | |
| 28 | 766 |
|
12/48 | 0% | 2.00 | ONLINE | Winter riichi-blitz 2017 | Russia | |
| 29 | 239 |
|
52/68 | 0% | 2.40 | ONLINE | Autumn riichi-blitz 2016 | Russia |