Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Common russian riichi rating (CRR)
Rating date May 1, 2026 (latest changes May 1, 2026).
95 place (457.28).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (494.74 * 3.85 * 0.29 + 169.49 * 3.25 * 0.71 + 885.71 * 1.90 * 0.86 + 584.42 * 3.45 * 1 + 540.54 * 3.40 * 1) / (3.85 * 0.29 + 3.25 * 0.71 + 1.90 * 0.86 + 3.45 * 1 + 3.40 * 1) = 523.877911681685
p2 = (584.42 * 3.45 * 1 + 540.54 * 3.40 * 1 + 885.71 * 1.90 * 0.86 + 494.74 * 3.85 * 0.29) / max_coefficients = 390.67759197324415
score = 523.877911681685 * 0.5 + 390.67759197324415 * 0.5 = 457.27775182746456
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-05-01 | 92 -> 95 | 465.74 -> 457.28 |
SPB Riichi Open 2024: 43% -> 29% |
| 2026-04-27 | 93 -> 92 | 465.74 | |
| 2026-04-26 | 86 -> 93 | 477.66 -> 465.74 |
Seihoku spring tournament 2025: 100% -> 86% |
| 2026-04-19 | 81 -> 86 | 477.66 | |
| 2026-04-16 | 84 -> 81 | 471.30 -> 477.66 |
White Wolf Cup: 86% -> 71% |
| 2026-04-13 | 87 -> 84 | 471.30 | |
| 2026-04-04 | 88 -> 87 | 471.30 | |
| 2026-04-02 | 89 -> 88 | 471.30 | |
| 2026-03-21 | 90 -> 89 | 471.30 | |
| 2026-03-15 | 91 -> 90 | 471.30 |