Maniakhin Petr
From Saint Petersburg, Russia
EMA: 15990315
Internal rating (RR)
Rating date March 19, 2026 (latest changes March 14, 2026).
80 place (471.30).
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 * 0.43 + 169.49 * 3.25 * 0.86 + 885.71 * 1.90 * 1 + 584.42 * 3.45 * 1 + 540.54 * 3.40 * 1) / (3.85 * 0.43 + 3.25 * 0.86 + 1.90 * 1 + 3.45 * 1 + 3.40 * 1) = 517.639394540367
p2 = (584.42 * 3.45 * 1 + 540.54 * 3.40 * 1 + 885.71 * 1.90 * 1 + 494.74 * 3.85 * 0.43) / max_coefficients = 424.9698996655518
score = 517.639394540367 * 0.5 + 424.9698996655518 * 0.5 = 471.3046471029594
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-03-14 | 82 -> 80 | 471.30 | |
| 2026-03-12 | 84 -> 82 | 471.30 | |
| 2026-03-02 | 85 -> 84 | 471.30 | |
| 2026-03-01 | 81 -> 85 | 479.94 -> 471.30 |
SPB Riichi Open 2024: 57% -> 43% |
| 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 |