Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Internal rating (RR)
Rating date Feb. 27, 2026 (latest changes Feb. 23, 2026).
81 place (479.94).
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 * 0.57 + 169.49 * 3.25 * 0.86 + 885.71 * 1.90 * 1 + 584.42 * 3.45 * 1 + 540.54 * 3.40 * 1) / (3.85 * 0.57 + 3.25 * 0.86 + 1.90 * 1 + 3.45 * 1 + 3.40 * 1) = 516.7229504061203
p2 = (584.42 * 3.45 * 1 + 540.54 * 3.40 * 1 + 885.71 * 1.90 * 1 + 494.74 * 3.85 * 0.57) / max_coefficients = 443.16387959866216
score = 516.7229504061203 * 0.5 + 443.16387959866216 * 0.5 = 479.94341500239125
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-02-23 | 97 -> 81 | 407.90 -> 479.94 |
White Wolf Cup 2026: 0% -> 100% |
| 2026-02-16 | 101 -> 97 | 404.74 -> 407.90 |
White Wolf Cup: 100% -> 86% |
| 2026-02-13 | 102 -> 101 | 404.74 | |
| 2026-02-08 | 99 -> 102 | 404.74 | |
| 2026-02-04 | 102 -> 99 | 404.74 | |
| 2026-01-25 | 99 -> 102 | 404.74 | |
| 2026-01-12 | 102 -> 99 | 404.74 | |
| 2026-01-07 | 99 -> 102 | 404.74 | |
| 2026-01-01 | 100 -> 99 | 414.79 -> 404.74 |
SPB Riichi Open 2024: 71% -> 57% |
| 2025-12-07 | 99 -> 100 | 414.79 |