Petrushchenko Sergey
From Moscow, Russia
EMA: 15990288
Internal rating (RR)
Rating date Aug. 9, 2025 (latest changes Aug. 9, 2025).
31 place (655.53).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (775.70 * 4 * 0.14 + 607.84 * 3.05 * 0.57 + 86.96 * 2.10 * 0.57 + 233.64 * 4.60 * 0.71 + 490.20 * 3.05 * 0.71 + 898.73 * 3.65 * 0.86 + 778.95 * 3.85 * 1 + 741.57 * 3.75 * 1 + 709.68 * 3.10 * 1 + 523.81 * 2.60 * 1 + 764.71 * 3.05 * 1 + 372.88 * 3.25 * 1 + 677.42 * 2.40 * 1 + 514.29 * 1.90 * 1 + 866.67 * 2 * 1 + 200 * 2.45 * 1) / (4 * 0.14 + 3.05 * 0.57 + 2.10 * 0.57 + 4.60 * 0.71 + 3.05 * 0.71 + 3.65 * 0.86 + 3.85 * 1 + 3.75 * 1 + 3.10 * 1 + 2.60 * 1 + 3.05 * 1 + 3.25 * 1 + 2.40 * 1 + 1.90 * 1 + 2 * 1 + 2.45 * 1) = 592.3943671719588
p2 = (778.95 * 3.85 * 1 + 898.73 * 3.65 * 0.86 + 741.57 * 3.75 * 1 + 764.71 * 3.05 * 1) / max_coefficients = 718.6717105263158
score = 592.3943671719588 * 0.5 + 718.6717105263158 * 0.5 = 655.5330388491373
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-09 | 32 -> 31 | 654.99 -> 655.53 |
Agari Summer Tournament 2024: 86% -> 71% |
| 2025-08-04 | 29 -> 32 | 668.68 -> 654.99 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 27 -> 29 | 668.68 | |
| 2025-07-30 | 27 | 666.85 -> 668.68 |
Seihoku spring tournament 2024: 71% -> 57% |
| 2025-07-13 | 24 -> 27 | 679.07 -> 666.85 |
Agari Summer Tournament 2025: 0% -> 100% |
| 2025-07-12 | 28 -> 24 | 668.98 -> 679.07 |
X Russian Championship: 86% -> 71% |
| 2025-07-10 | 27 -> 28 | 668.97 -> 668.98 |
Agari Spring Tournament 2024: 71% -> 57% |
| 2025-07-03 | 27 | 670.13 -> 668.97 |
SPB Riichi Open 2023: 29% -> 14% |
| 2025-06-15 | 16 -> 27 | 701.08 -> 670.13 |
13 bloody tiles: 0% -> 100% |
| 2025-06-11 | 21 -> 16 | 697.65 -> 701.08 |
Money can not buy tenpai: 14% -> 0% |