Petsilyak Igor
From Moscow, Russia
EMA: 15990408
Internal rating (RR)
Rating date Sept. 5, 2025 (latest changes Sept. 3, 2025).
95 place (441.30).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (738.32 * 4.60 * 0.71 + 0 * 3.05 * 0.71 + 177.22 * 3.65 * 0.86 + 42.11 * 3.85 * 0.86 + 910.11 * 3.75 * 1 + 258.06 * 3.10 * 1 + 254.90 * 3.05 * 1 + 466.67 * 2.45 * 1 + 181.82 * 3.45 * 1) / (4.60 * 0.71 + 3.05 * 0.71 + 3.65 * 0.86 + 3.85 * 0.86 + 3.75 * 1 + 3.10 * 1 + 3.05 * 1 + 2.45 * 1 + 3.45 * 1) = 356.782820853696
p2 = (910.11 * 3.75 * 1 + 738.32 * 4.60 * 0.71 + 466.67 * 2.45 * 1 + 258.06 * 3.10 * 1) / max_coefficients = 525.8243243243243
score = 356.782820853696 * 0.5 + 525.8243243243243 * 0.5 = 441.3035725890102
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 90 -> 95 | 459.19 -> 441.30 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 94 -> 90 | 452.27 -> 459.19 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 92 -> 94 | 440.01 -> 452.27 |
SPB Riichi Open 2025: 0% -> 100% |
| 2025-08-09 | 93 -> 92 | 436.90 -> 440.01 |
Agari Summer Tournament 2024: 86% -> 71% |
| 2025-08-04 | 94 -> 93 | 432.57 -> 436.90 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 93 -> 94 | 432.57 | |
| 2025-07-13 | 94 -> 93 | 415.09 -> 432.57 |
Agari Summer Tournament 2025: 0% -> 100% |
| 2025-07-12 | 92 -> 94 | 431.31 -> 415.09 |
X Russian Championship: 86% -> 71% |
| 2025-07-10 | 93 -> 92 | 431.31 | |
| 2025-07-03 | 94 -> 93 | 428.41 -> 431.31 |
SPB Riichi Open 2023: 29% -> 14% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 182 |
|
64/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 2 | 467 |
|
17/31 | 100% | 2.45 | RR | Agari Summer Tournament 2025 | Moscow | |
| 3 | 255 |
|
39/52 | 100% | 3.05 | RR | Agari Winter Tournament 2025 | Moscow | |
| 4 | 258 |
|
24/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 5 | 910 |
|
9/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 6 | 42 |
|
92/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 7 | 177 |
|
66/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 8 | 0 |
|
52/52 | 71% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow | |
| 9 | 738 |
|
29/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
| 10 | 103 |
|
97/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 11 | 493 |
|
39/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 12 | 189 |
|
91/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
| 13 | 733 |
|
21/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg |