Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Common russian riichi rating (CRR)
Rating date Jan. 5, 2025 (latest changes Jan. 5, 2025).
127 place (298.87).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (682.24 * 4 * 0.57 + 494.74 * 3.85 * 1 + 0 + 0 + 0) / (4 * 0.57 + 3.85 * 1 + 1 + 1 + 1) = 379.1836332588992
p2 = (494.74 * 3.85 * 1 + 682.24 * 4 * 0.57) / max_coefficients = 218.55331230283912
score = 379.1836332588992 * 0.5 + 218.55331230283912 * 0.5 = 298.8684727808692
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-01-05 | 129 -> 127 | 298.87 | |
| 2025-01-04 | 127 -> 129 | 298.87 | |
| 2025-01-03 | 122 -> 127 | 320.09 -> 298.87 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-12-25 | 124 -> 122 | 320.09 | |
| 2024-12-22 | 125 -> 124 | 320.09 | |
| 2024-12-11 | 126 -> 125 | 320.09 | |
| 2024-12-01 | 125 -> 126 | 320.09 | |
| 2024-11-05 | 128 -> 125 | 320.09 | |
| 2024-11-03 | 124 -> 128 | 340.31 -> 320.09 |
SPB Riichi Open 2023: 86% -> 71% |
| 2024-10-13 | 117 -> 124 | 343.08 -> 340.31 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 495 |
|
49/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 |
| 2 | 682 |
|
35/108 | 57% | 4.00 | RR | SPB Riichi Open 2023 |
| 3 | 627 |
|
29/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 |
| 4 | 476 |
|
34/64 | 0% | 3.45 | EMA | Saint Petersburg Open 2019 |
| 5 | 513 |
|
20/40 | 0% | 2.90 | RR | Summer Cup 2019 |
| 6 | 256 |
|
30/40 | 0% | 2.90 | RR | North Cup 2018 |
| 7 | 304 |
|
17/24 | 0% | 2.50 | RR | West cup 2018 |
| 8 | 408 |
|
43/72 | 0% | 3.55 | EMA | RCR Saint Petersburg South Cup 2018 |
| 9 | 516 |
|
16/32 | 0% | 2.70 | RR | East Cup 2018 |
| 10 | 60 |
|
79/84 | 0% | 3.40 | EMA | VI Russian Riichi Championship 2017 |