Petrushchenko Sergey
From Moscow, Russia
EMA: 15990288
Internal rating (RR)
Rating date Nov. 5, 2026 (latest changes Nov. 4, 2026).
47 place (606.71).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.40 * 1 + 3.40 * 1 + 3.40 * 1) = 14.91
p1 = (706.29 * 4.71 * 1 + 745.76 * 3.40 * 1 + 789.47 * 2.25 * 1 + 866.67 * 2 * 0.57 + 647.89 * 3.40 * 1 + 764.71 * 3.05 * 0.29 + 709.68 * 3.10 * 0.29 + 677.42 * 2.40 * 0.29 + 542.86 * 1.90 * 1 + 523.81 * 2.60 * 0.29 + 514.29 * 1.90 * 0.43 + 372.88 * 3.25 * 0.29 + 452.38 * 2.90 * 1 + 454.55 * 3 * 1 + 200 * 2.45 * 0.71 + 85.71 * 3.50 * 0.43 + 194.03 * 4.10 * 0.57) / (4.71 * 1 + 3.40 * 1 + 2.25 * 1 + 2 * 0.57 + 3.40 * 1 + 3.05 * 0.29 + 3.10 * 0.29 + 2.40 * 0.29 + 1.90 * 1 + 2.60 * 0.29 + 1.90 * 0.43 + 3.25 * 0.29 + 2.90 * 1 + 3 * 1 + 2.45 * 0.71 + 3.50 * 0.43 + 4.10 * 0.57) = 553.3763974609392
p2 = (706.29 * 4.71 * 1 + 745.76 * 3.40 * 1 + 647.89 * 3.40 * 1 + 789.47 * 2.25 * 1) / max_coefficients = 660.0516431924882
score = 553.3763974609392 * 0.5 + 660.0516431924882 * 0.5 = 606.7140203267137
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-11-04 | 49 -> 47 | 596.01 -> 606.71 | |
| 2026-11-03 | 50 -> 49 | 593.02 -> 596.01 |
Riichi over The Volga 2025: 57% -> 43% |
| 2026-11-02 | 50 | 593.65 -> 593.02 |
Riichi Maslenitsa (shrovetide): 43% -> 29% |
| 2026-10-31 | 54 -> 50 | 580.68 -> 593.65 |
SPB Riichi Open 2025: 86% -> 71% Seihoku autumn tournament 2026: 0% -> 100% |
| 2026-10-26 | 53 -> 54 | 580.65 -> 580.68 |
Seihoku spring tournament 2025: 57% -> 43% |
| 2026-10-16 | 54 -> 53 | 579.69 -> 580.65 |
White Wolf Cup: 43% -> 29% |
| 2026-10-15 | 56 -> 54 | 577.07 -> 579.69 |
13 bloody tiles: 71% -> 57% |
| 2026-10-13 | 52 -> 56 | 592.61 -> 577.07 |
Moscow Riichi 2024: 14% -> 0% |
| 2026-10-08 | 52 | 593.93 -> 592.61 |
Random not fault: 71% -> 57% |
| 2026-10-03 | 53 -> 52 | 593.93 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 543 |
|
17/36 | 100% | 1.90 | RR | Seihoku autumn tournament 2026 | Saint Petersburg | |
| 2 | 648 |
|
26/72 | 100% | 3.40 | RR | Sunset Wolf Cup 2026 | Saint Petersburg | |
| 3 | 746 |
|
16/60 | 100% | 3.40 | RR | Ufa Championship 2026 | Ufa | |
| 4 | 706 |
|
43/144 | 100% | 4.71 | RR | XII Russian Championship | Samara | |
| 5 | 452 |
|
24/43 | 100% | 2.90 | RR | Sturgeon in tempai | Saratov | |
| 6 | 260 |
|
38/51 | 100% | 3.10 | RR | Moscow Riichi 2026 | Moscow | |
| 7 | 122 |
|
66/75 | 100% | 3.40 | RR | White Wolf Cup 2026 | Saint Petersburg | |
| 8 | 455 |
|
31/56 | 100% | 3.00 | RR | Riichi On Ice 2026 | Samara | |
| 9 | 789 |
|
5/20 | 100% | 2.25 | RR | Winter Hatiko | Korolyov | |
| 10 | 117 |
|
69/78 | 71% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 11 | 200 |
|
25/31 | 71% | 2.45 | RR | Agari Summer Tournament 2025 | Moscow | |
| 12 | 194 |
|
55/68 | 57% | 4.10 | RR | 13 bloody tiles | Perm | |
| 13 | 867 |
|
🥉 | 3/16 | 57% | 2.00 | RR | Random not fault | Moscow |
| 14 | 86 |
|
65/71 | 43% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 15 | 514 |
|
18/36 | 43% | 1.90 | RR | Seihoku spring tournament 2025 | Saint Petersburg | |
| 16 | 677 |
|
11/32 | 29% | 2.40 | RR | Riichi Maslenitsa (shrovetide) | Yekaterinburg | |
| 17 | 373 |
|
38/60 | 29% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 18 | 765 |
|
13/52 | 29% | 3.05 | RR | Agari Winter Tournament 2025 | Moscow | |
| 19 | 524 |
|
21/43 | 29% | 2.60 | RR | Riichi On Ice | Samara | |
| 20 | 710 |
|
10/32 | 29% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 21 | 742 |
|
24/90 | 0% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 22 | 779 |
|
22/96 | 0% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 23 | 899 |
|
9/80 | 0% | 3.65 | RR | Riichi over Volga | Samara | |
| 24 | 490 |
|
27/52 | 0% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow | |
| 25 | 234 |
|
83/108 | 0% | 4.60 | RR | X Russian Championship | Perm | |
| 26 | 87 |
|
43/47 | 0% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg | |
| 27 | 608 |
|
21/52 | 0% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 28 | 776 |
|
25/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 29 | 172 |
|
73/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 30 | 907 |
|
8/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 31 | 982 |
|
🥉 | 3/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |
| 32 | 742 |
|
18/67 | 0% | 3.45 | RR | Tenpai can't buy happiness | Perm | |
| 33 | 0 |
|
48/48 | 0% | 3.10 | RR | Agari team tournament | Moscow | |
| 34 | 573 |
|
33/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg | |
| 35 | 839 |
|
6/32 | 0% | 2.70 | RR | The last chance: back to 2019 | Moscow | |
| 36 | 577 |
|
48/112 | 0% | 4.05 | EMA | VIII Russian Riichi Championship | Moscow | |
| 37 | 429 |
|
37/64 | 0% | 3.45 | EMA | Saint Petersburg Open 2019 | Saint Petersburg | |
| 38 | 968 |
|
🥉 | 3/64 | 0% | 3.85 | EMA | Aki Shanten 2019 | Perm |
| 39 | 909 |
|
6/56 | 0% | 3.18 | EMA | Tri Nitro Tournament 2019 - 7th Detonation | Paris | |
| 40 | 478 |
|
13/24 | 0% | 2.20 | EMA | Valencia Riichi 2019 | Valencia | |
| 41 | 629 |
|
14/36 | 0% | 3.20 | RR | Moscow Open Riichi Marathon 2019 | Moscow | |
| 42 | 77 |
|
37/40 | 0% | 2.90 | RR | Summer Cup 2019 | Saint Petersburg | |
| 43 | 60 |
|
79/84 | 0% | 4.20 | EMA | Haru Shanten 2019 | Perm | |
| 44 | 617 |
|
19/48 | 0% | 3.10 | RR | Agari team tournament 2019 | Moscow | |
| 45 | 821 |
|
8/40 | 0% | 2.90 | RR | North Cup 2018 | Saint Petersburg | |
| 46 | 508 |
|
32/64 | 0% | 3.45 | EMA | White Dragon Tournament | Moscow | |
| 47 | 835 |
|
16/92 | 0% | 3.80 | EMA | VII Russian Riichi Championship "Aki Shanten" | Perm | |
| 48 | 957 |
|
🥉 | 3/48 | 0% | 2.80 | EMA | 1st Spanish Riichi Open 2018 | Valencia |
| 49 | 149 |
|
41/48 | 0% | 3.10 | RR | Moscow Riichi Open 2018 | Moscow | |
| 50 | 926 |
|
🥉 | 3/28 | 0% | 3.00 | RR | Moscow Open Riichi Marathon | Moscow |
| 51 | 613 |
|
13/32 | 0% | 2.85 | EMA | 5th Prague Open Riichi Championship 2018 | Prague | |
| 52 | 859 |
|
11/72 | 0% | 3.55 | EMA | RCR Saint Petersburg South Cup 2018 | Saint Petersburg | |
| 53 | 859 |
|
11/72 | 0% | 3.85 | EMA | Haru Shanten 2018 | Perm | |
| 54 | 340 |
|
32/48 | 0% | 2.80 | EMA | Great Wave 2018 | Helsinki | |
| 55 | 687 |
|
27/84 | 0% | 3.40 | EMA | VI Russian Riichi Championship 2017 | Saint Petersburg | |
| 56 | 845 |
|
12/72 | 0% | 3.25 | EMA | Perm Riichi 2017 Aki Shanten | Perm | |
| 57 | 48 |
|
61/64 | 0% | 3.45 | EMA | Moscow Riichi Open 2017 | Moscow | |
| 58 | 111 |
|
25/28 | 0% | 2.60 | RR | Moscow Riichi Half Marathon 2017 | Moscow | |
| 59 | 407 |
|
17/28 | 0% | 2.30 | EMA | Riichi Open Bratislava 2017 | Bratislava | |
| 60 | 57 |
|
34/36 | 0% | 3.20 | RR | Moscow Open Riichi Marathon 2017 | Moscow | |
| 61 | 913 |
|
🥉 | 3/24 | 0% | 2.90 | EMA | Prague Open 2017 | Prague |
| 62 | 282 |
|
29/40 | 0% | 2.00 | RR | Moscow championship 2017 (JPML-A rules) | Moscow | |
| 63 | 733 |
|
5/16 | 0% | 2.30 | RR | February mini-tournament glhf; 2017 | Moscow | |
| 64 | 391 |
|
15/24 | 0% | 1.60 | RR | December tournament glhf; 2016 | Moscow | |
| 65 | 507 |
|
36/72 | 0% | 3.25 | EMA | Saint Petersburg Riichi Open 2016 | Saint Petersburg | |
| 66 | 194 |
|
26/32 | 0% | 1.60 | RR | Tournament of 4 winds. West cup 2016 | Saint Petersburg | |
| 67 | 103 |
|
79/88 | 0% | 3.45 | EMA | V Russian Riichi Championship 2016 | Moscow | |
| 68 | 263 |
|
15/20 | 0% | 1.50 | RR | August tournament glhf; 2016 | Moscow | |
| 69 | 0 |
|
24/24 | 0% | 1.60 | RR | May tournament glhf; 2016 | Moscow |