Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Common russian riichi rating (CRR)
Rating date July 21, 2026 (latest changes July 18, 2026).
112 place (438.25).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997
p1 = (494.74 * 3.85 * 0.14 + 169.49 * 3.25 * 0.57 + 885.71 * 1.90 * 0.71 + 584.42 * 3.45 * 1 + 540.54 * 3.40 * 1) / (3.85 * 0.14 + 3.25 * 0.57 + 1.90 * 0.71 + 3.45 * 1 + 3.40 * 1) = 531.6436138316068
p2 = (584.42 * 3.45 * 1 + 540.54 * 3.40 * 1 + 885.71 * 1.90 * 0.71 + 169.49 * 3.25 * 0.57) / max_coefficients = 344.85951364155
score = 531.6436138316068 * 0.5 + 344.85951364155 * 0.5 = 438.2515637365784
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-07-18 | 111 -> 112 | 438.25 | |
| 2026-07-14 | 112 -> 111 | 438.25 | |
| 2026-07-13 | 113 -> 112 | 438.25 | |
| 2026-07-12 | 112 -> 113 | 438.25 | |
| 2026-07-11 | 110 -> 112 | 438.25 | |
| 2026-07-02 | 112 -> 110 | 438.25 | |
| 2026-07-01 | 107 -> 112 | 444.71 -> 438.25 |
SPB Riichi Open 2024: 29% -> 14% |
| 2026-06-27 | 109 -> 107 | 444.71 | |
| 2026-06-26 | 105 -> 109 | 456.65 -> 444.71 |
Seihoku spring tournament 2025: 86% -> 71% |
| 2026-06-16 | 109 -> 105 | 449.45 -> 456.65 |
White Wolf Cup: 71% -> 57% |