Maniakhin Petr

From Saint Petersburg, Russia

EMA: 15990315

Player page

Internal rating (RR)

Rating date Sept. 4, 2025 (latest changes Sept. 3, 2025).

97 place (426.74).

max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8

p1 = (494.74 * 3.85 * 0.86 + 169.49 * 3.25 * 1 + 885.71 * 1.90 * 1 + 584.42 * 3.45 * 1 + 0) / (3.85 * 0.86 + 3.25 * 1 + 1.90 * 1 + 3.45 * 1 + 1) = 456.0128094661676

p2 = (584.42 * 3.45 * 1 + 885.71 * 1.90 * 1 + 494.74 * 3.85 * 0.86 + 169.49 * 3.25 * 1) / max_coefficients = 397.4655405405406

score = 456.0128094661676 * 0.5 + 397.4655405405406 * 0.5 = 426.7391750033541

Rating changes

Show

Date Place Points Reason
2025-09-03 92 -> 97 450.21 -> 426.74

SPB Riichi Open 2023: 14% -> 0%

2025-09-01 92 453.76 -> 450.21

SPB Riichi Open 2024: 100% -> 86%

2025-08-31 116 -> 92 363.14 -> 453.76

SPB Riichi Open 2025: 0% -> 100%

2025-08-04 117 -> 116 361.68 -> 363.14
2025-08-03 116 -> 117 361.68
2025-07-13 112 -> 116 361.68
2025-07-12 111 -> 112 358.92 -> 361.68
2025-07-03 110 -> 111 377.89 -> 358.92

SPB Riichi Open 2023: 29% -> 14%

2025-06-15 105 -> 110 382.54 -> 377.89
2025-06-11 107 -> 105 382.54

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 584 2025-08-31 33/78 100% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
2 886 2025-04-26 5/36 100% 1.90 RR Seihoku spring tournament 2025 Saint Petersburg
3 169 2025-02-16 50/60 100% 3.25 RR White Wolf Cup Saint Petersburg
4 495 2024-09-01 49/96 86% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
5 682 2023-09-03 35/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
6 627 2021-11-28 29/76 0% 3.45 RR Saint Petersburg Open 2021 Saint Petersburg
7 476 2019-11-24 34/64 0% 3.45 EMA Saint Petersburg Open 2019 Saint Petersburg
8 513 2019-06-02 20/40 0% 2.90 RR Summer Cup 2019 Saint Petersburg
9 256 2018-12-23 30/40 0% 2.90 RR North Cup 2018 Saint Petersburg
10 304 2018-09-23 17/24 0% 2.50 RR West cup 2018 Saint Petersburg
11 408 2018-06-11 43/72 0% 3.55 EMA RCR Saint Petersburg South Cup 2018 Saint Petersburg
12 516 2018-03-04 16/32 0% 2.70 RR East Cup 2018 Saint Petersburg
13 60 2017-12-11 79/84 0% 3.40 EMA VI Russian Riichi Championship 2017 Saint Petersburg