Petrushchenko Sergey
From Moscow, Russia
EMA: 15990288
Internal rating (RR)
Rating date Oct. 10, 2025 (latest changes Oct. 9, 2025).
37 place (615.77).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (898.73 * 3.65 * 0.71 + 778.95 * 3.85 * 0.86 + 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 + 607.84 * 3.05 * 0.43 + 86.96 * 2.10 * 0.43 + 233.64 * 4.60 * 0.57 + 490.20 * 3.05 * 0.57 + 866.67 * 2 * 1 + 194.03 * 4.10 * 1 + 200 * 2.45 * 1) / (3.65 * 0.71 + 3.85 * 0.86 + 3.75 * 1 + 3.10 * 1 + 2.60 * 1 + 3.05 * 1 + 3.25 * 1 + 2.40 * 1 + 1.90 * 1 + 3.05 * 0.43 + 2.10 * 0.43 + 4.60 * 0.57 + 3.05 * 0.57 + 2 * 1 + 4.10 * 1 + 2.45 * 1) = 554.0556492760347
p2 = (741.57 * 3.75 * 1 + 778.95 * 3.85 * 0.86 + 898.73 * 3.65 * 0.71 + 764.71 * 3.05 * 1) / max_coefficients = 677.4885135135135
score = 554.0556492760347 * 0.5 + 677.4885135135135 * 0.5 = 615.7720813947741
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-10-09 | 39 -> 37 | 615.44 -> 615.77 |
Agari Summer Tournament 2024: 71% -> 57% |
| 2025-10-04 | 36 -> 39 | 633.40 -> 615.44 |
Riichi over Volga: 86% -> 71% |
| 2025-09-30 | 36 | 631.74 -> 633.40 |
Seihoku spring tournament 2024: 57% -> 43% |
| 2025-09-14 | 37 -> 36 | 631.74 | |
| 2025-09-12 | 39 -> 37 | 629.28 -> 631.74 |
X Russian Championship: 71% -> 57% |
| 2025-09-10 | 39 | 629.58 -> 629.28 |
Agari Spring Tournament 2024: 57% -> 43% |
| 2025-09-03 | 40 -> 39 | 631.04 -> 629.58 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 39 -> 40 | 637.20 -> 631.04 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 31 -> 39 | 655.53 -> 637.20 |
SPB Riichi Open 2025: 0% -> 100% |
| 2025-08-09 | 32 -> 31 | 654.99 -> 655.53 |
Agari Summer Tournament 2024: 86% -> 71% |