Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Common russian riichi rating (CRR)
Rating date Sept. 4, 2026 (latest changes Sept. 4, 2026).
140 place (396.72).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41
p1 = (169.49 * 3.25 * 0.43 + 885.71 * 1.90 * 0.57 + 584.42 * 3.45 * 0.86 + 540.54 * 3.40 * 1 + 0) / (3.25 * 0.43 + 1.90 * 0.57 + 3.45 * 0.86 + 3.40 * 1 + 1) = 484.3240451400804
p2 = (540.54 * 3.40 * 1 + 584.42 * 3.45 * 0.86 + 885.71 * 1.90 * 0.57 + 169.49 * 3.25 * 0.43) / max_coefficients = 309.125243348475
score = 484.3240451400804 * 0.5 + 309.125243348475 * 0.5 = 396.72464424427767
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-09-01 | 132 -> 140 | 424.00 -> 396.72 |
SPB Riichi Open 2024: 14% -> 0% |
| 2026-08-31 | 124 -> 132 | 434.01 -> 424.00 |
SPB Riichi Open 2025: 100% -> 86% |
| 2026-08-30 | 121 -> 124 | 434.01 | |
| 2026-08-27 | 122 -> 121 | 434.01 | |
| 2026-08-26 | 112 -> 122 | 446.43 -> 434.01 |
Seihoku spring tournament 2025: 71% -> 57% |
| 2026-08-16 | 112 | 439.52 -> 446.43 |
White Wolf Cup: 57% -> 43% |
| 2026-08-15 | 112 | 438.25 -> 439.52 | |
| 2026-08-13 | 113 -> 112 | 438.25 | |
| 2026-08-03 | 114 -> 113 | 438.25 | |
| 2026-07-25 | 112 -> 114 | 438.25 |