Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Internal rating (RR)
Rating date May 7, 2026 (latest changes May 7, 2026).
79 place (458.59).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.45 * 1 + 3.40 * 1) = 14.85
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 = 393.3084175084175
score = 523.877911681685 * 0.5 + 393.3084175084175 * 0.5 = 458.59316459505123
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-05-07 | 80 -> 79 | 458.59 | |
| 2026-05-03 | 81 -> 80 | 457.28 -> 458.59 | |
| 2026-05-01 | 79 -> 81 | 465.74 -> 457.28 |
SPB Riichi Open 2024: 43% -> 29% |
| 2026-04-26 | 76 -> 79 | 477.66 -> 465.74 |
Seihoku spring tournament 2025: 100% -> 86% |
| 2026-04-16 | 77 -> 76 | 471.30 -> 477.66 |
White Wolf Cup: 86% -> 71% |
| 2026-04-13 | 79 -> 77 | 471.30 | |
| 2026-04-11 | 78 -> 79 | 471.30 | |
| 2026-04-05 | 79 -> 78 | 471.30 | |
| 2026-04-02 | 80 -> 79 | 471.30 | |
| 2026-03-14 | 82 -> 80 | 471.30 |