Petsilyak Igor
From Moscow, Russia
EMA: 15990408
Internal rating (RR)
Rating date May 10, 2026 (latest changes May 7, 2026).
85 place (445.98).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.45 * 1 + 3.40 * 1) = 14.85
p1 = (738.32 * 4.60 * 0.14 + 0 * 3.05 * 0.14 + 177.22 * 3.65 * 0.29 + 42.11 * 3.85 * 0.29 + 910.11 * 3.75 * 0.43 + 258.06 * 3.10 * 0.57 + 254.90 * 3.05 * 0.71 + 466.67 * 2.45 * 1 + 181.82 * 3.45 * 1 + 578.95 * 3.90 * 1 + 466.67 * 3 * 1 + 554.05 * 3.40 * 1) / (4.60 * 0.14 + 3.05 * 0.14 + 3.65 * 0.29 + 3.85 * 0.29 + 3.75 * 0.43 + 3.10 * 0.57 + 3.05 * 0.71 + 2.45 * 1 + 3.45 * 1 + 3.90 * 1 + 3 * 1 + 3.40 * 1) = 420.2729228900411
p2 = (578.95 * 3.90 * 1 + 554.05 * 3.40 * 1 + 910.11 * 3.75 * 0.43 + 466.67 * 3 * 1) / max_coefficients = 471.6801346801347
score = 420.2729228900411 * 0.5 + 471.6801346801347 * 0.5 = 445.9765287850879
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-05-07 | 85 | 444.56 -> 445.98 |
Moscow Open Riichi Marathon: 71% -> 57% |
| 2026-05-03 | 86 -> 85 | 442.99 -> 444.56 | |
| 2026-05-02 | 87 -> 86 | 442.99 | |
| 2026-05-01 | 87 | 439.01 -> 442.99 |
SPB Riichi Open 2024: 43% -> 29% |
| 2026-04-13 | 84 -> 87 | 460.37 -> 439.01 |
Moscow Riichi 2024: 57% -> 43% |
| 2026-04-11 | 83 -> 84 | 460.37 | |
| 2026-04-09 | 83 | 456.98 -> 460.37 |
Agari Summer Tournament 2024: 29% -> 14% |
| 2026-04-05 | 77 -> 83 | 473.93 -> 456.98 |
Moscow Riichi 2026: 0% -> 100% |
| 2026-04-04 | 80 -> 77 | 471.00 -> 473.93 |
Riichi over Volga: 43% -> 29% |
| 2026-04-02 | 82 -> 80 | 469.35 -> 471.00 |
Agari Winter Tournament 2025: 86% -> 71% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 80 |
|
47/51 | 100% | 3.10 | RR | Moscow Riichi 2026 | Moscow | |
| 2 | 554 |
|
34/75 | 100% | 3.40 | RR | White Wolf Cup 2026 | Saint Petersburg | |
| 3 | 467 |
|
17/31 | 100% | 3.00 | RR | Moscow Open Riichi Marathon 2026 | Moscow | |
| 4 | 579 |
|
25/58 | 100% | 3.90 | RR | XI Russian Championship | Moscow | |
| 5 | 182 |
|
64/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 6 | 467 |
|
17/31 | 100% | 2.45 | RR | Agari Summer Tournament 2025 | Moscow | |
| 7 | 255 |
|
39/52 | 71% | 3.05 | RR | Agari Winter Tournament 2025 | Moscow | |
| 8 | 258 |
|
24/32 | 57% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 9 | 910 |
|
9/90 | 43% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 10 | 42 |
|
92/96 | 29% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 11 | 177 |
|
66/80 | 29% | 3.65 | RR | Riichi over Volga | Samara | |
| 12 | 0 |
|
52/52 | 14% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow | |
| 13 | 738 |
|
29/108 | 14% | 4.60 | RR | X Russian Championship | Perm | |
| 14 | 103 |
|
97/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 15 | 493 |
|
39/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 16 | 189 |
|
91/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
| 17 | 733 |
|
21/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg |