Petrushchenko Sergey
From Moscow, Russia
EMA: 15990288
Online rating
Rating date July 4, 2025 (latest changes July 2, 2025).
8 place (602.11).
how we calculated rating score
max_coefficients = (4.45 * 1 + 3.70 * 0.86 + 3.05 * 1) = 10.67127
p1 = (1000 * 1.90 * 0.71 + 971.83 * 3.05 * 1 + 700 * 2.40 * 1 + 0 * 1.80 * 0.86 + 0) / (1.90 * 0.71 + 3.05 * 1 + 2.40 * 1 + 1.80 * 0.86 + 1) = 641.8483521302253
p2 = (971.83 * 3.05 * 1 + 700 * 2.40 * 1 + 1000 * 1.90 * 0.71) / max_coefficients = 562.374487760126
score = 641.8483521302253 * 0.5 + 562.374487760126 * 0.5 = 602.1114199451756
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-06-28 | 6 -> 8 | 619.87 -> 602.11 |
Wrong Chair: 86% -> 71% |
| 2025-06-27 | 3 -> 6 | 689.76 -> 619.87 | |
| 2025-06-22 | 3 | 681.27 -> 689.76 |
Royale roulette: 100% -> 86% |
| 2025-06-16 | 3 | 660.25 -> 681.27 | |
| 2025-04-28 | 3 | 679.97 -> 660.25 |
Wrong Chair: 100% -> 86% |
| 2025-04-05 | 6 -> 3 | 554.09 -> 679.97 |
Spring online tournament 2025: 0% -> 100% |
| 2025-03-02 | 7 -> 6 | 543.74 -> 554.09 | |
| 2025-01-18 | 28 -> 7 | 260.54 -> 543.74 |
Winter online tournament 2025: 0% -> 100% |
| 2025-01-02 | 32 -> 28 | 260.54 | |
| 2024-11-02 | 36 -> 32 | 257.04 -> 260.54 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 700 |
|
13/41 | 100% | 2.40 | ONLINE | Spring online tournament 2025 | Russia |
| 2 | 972 |
|
3/72 | 100% | 3.05 | ONLINE | Winter online tournament 2025 | Russia |
| 3 | 0 |
|
16/16 | 86% | 1.80 | ONLINE | Royale roulette | Russia |
| 4 | 1000 |
|
1/20 | 71% | 1.90 | ONLINE | Wrong Chair | Russia |
| 5 | 857 |
|
6/36 | 0% | 2.30 | ONLINE | Autumn Online Tournament | Russia |
| 6 | 418 |
|
33/56 | 0% | 2.80 | ONLINE | Summer Online Tournament | Russia |
| 7 | 0 |
|
40/40 | 0% | 2.40 | ONLINE | Winter Online Tournament | Russia |
| 8 | 681 |
|
16/48 | 0% | 2.60 | ONLINE | Demons of autumn wind | Russia |
| 9 | 770 |
|
21/88 | 0% | 3.25 | ONLINE | Winter Team Fight | Russia |
| 10 | 783 |
|
6/24 | 0% | 2.00 | ONLINE | 5G Tournament | Russia |
| 11 | 222 |
|
22/28 | 0% | 2.10 | ONLINE | Autumn Online Tournament | Russia |
| 12 | 452 |
|
18/32 | 0% | 2.20 | ONLINE | I wish to have dora san... | Russia |
| 13 | 884 |
|
6/44 | 0% | 2.50 | ONLINE | Summer Online Tournament | Russia |
| 14 | 590 |
|
17/40 | 0% | 2.40 | ONLINE | Spring Online Tournament | Russia |
| 15 | 735 |
|
23/84 | 0% | 3.20 | ONLINE | No Dora Tournament | Russia |
| 16 | 731 |
|
19/68 | 0% | 3.00 | ONLINE | Winter Online Tournament | Russia |
| 17 | 127 |
|
49/56 | 0% | 2.80 | ONLINE | Autumn Online Tournament | Russia |
| 18 | 804 |
|
11/52 | 0% | 2.70 | ONLINE | Rainy season tournament［梅雨］ | Russia |
| 19 | 915 |
|
7/72 | 0% | 3.05 | ONLINE | Summer Tournament | Russia |
| 20 | 133 |
|
118/136 | 0% | 3.69 | ONLINE | Riichi Online Open Team Cup | Russia |
| 21 | 159 |
|
91/108 | 0% | 3.50 | ONLINE | Spring tournament | Russia |
| 22 | 568 |
|
61/140 | 0% | 3.70 | ONLINE | Corona go away | Russia |
| 23 | 951 |
|
8/144 | 0% | 3.71 | ONLINE | Riichi Online Open Team Cup 2020 | Russia |
| 24 | 782 |
|
13/56 | 0% | 2.80 | ONLINE | Summer Online Tournament | Russia |
| 25 | 778 |
|
15/64 | 0% | 2.95 | ONLINE | Winter Online Tournament | Russia |
| 26 | 322 |
|
41/60 | 0% | 2.90 | ONLINE | Summer online tournament 2018 | Russia |
| 27 | 766 |
|
12/48 | 0% | 2.00 | ONLINE | Winter riichi-blitz 2017 | Russia |
| 28 | 239 |
|
52/68 | 0% | 2.40 | ONLINE | Autumn riichi-blitz 2016 | Russia |