Chekan Vikmar

From Saint Petersburg, Russia

EMA: 15990345

Player page

Internal rating (RR)

Rating date Aug. 31, 2025 (latest changes Aug. 31, 2025).

222 place (31.77).

max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2

p1 = (485.98 * 4 * 0.14 + 21.74 * 2.10 * 0.57 + 21.05 * 3.85 * 1 + 0 * 3.45 * 1 + 0) / (4 * 0.14 + 2.10 * 0.57 + 3.85 * 1 + 3.45 * 1 + 1) = 38.21957714510393

p2 = (485.98 * 4 * 0.14 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.57 + 0 * 3.45 * 1) / max_coefficients = 25.32434210526316

score = 38.21957714510393 * 0.5 + 25.32434210526316 * 0.5 = 31.77195962518355

Rating changes

Show

Date Place Points Reason
2025-08-31 212 -> 222 37.91 -> 31.77

SPB Riichi Open 2025: 0% -> 100%

2025-08-04 212 37.79 -> 37.91
2025-08-03 205 -> 212 37.79
2025-07-30 205 37.46 -> 37.79

Seihoku spring tournament 2024: 71% -> 57%

2025-07-13 201 -> 205 37.46
2025-07-12 201 37.22 -> 37.46
2025-07-03 198 -> 201 60.77 -> 37.22

SPB Riichi Open 2023: 29% -> 14%

2025-06-15 185 -> 198 61.41 -> 60.77
2025-06-11 195 -> 185 61.41
2025-05-30 195 60.65 -> 61.41

Seihoku spring tournament 2024: 86% -> 71%

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 0 2025-08-31 78/78 100% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
2 21 2024-09-01 94/96 100% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
3 22 2024-03-30 46/47 57% 2.10 RR Seihoku spring tournament 2024 Saint Petersburg
4 486 2023-09-03 56/108 14% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
5 721 2019-12-15 32/112 0% 4.05 EMA VIII Russian Riichi Championship Moscow
6 571 2019-11-24 28/64 0% 3.45 EMA Saint Petersburg Open 2019 Saint Petersburg
7 692 2019-06-02 13/40 0% 2.90 RR Summer Cup 2019 Saint Petersburg
8 590 2018-12-23 17/40 0% 2.90 RR North Cup 2018 Saint Petersburg
9 677 2018-03-04 11/32 0% 2.70 RR East Cup 2018 Saint Petersburg
10 108 2017-12-11 75/84 0% 3.40 EMA VI Russian Riichi Championship 2017 Saint Petersburg
11 1000 2017-10-01 🥇 1/40 0% 1.80 RR Saint Petersburg championship. Northern cup 2017 Saint Petersburg
12 1000 2017-06-03 🥇 1/40 0% 1.80 RR Saint Petersburg championship. West cup 2017 Saint Petersburg
13 977 2017-03-18 🥈 2/44 0% 1.90 RR Saint Petersburg championship. South cup 2017 Saint Petersburg
14 533 2016-04-17 8/16 0% 1.20 RR Riichi mahjong league tournament 2016 (JPML-A rules) Moscow
15 162 2016-03-13 84/100 0% 3.40 RR "Japanese House" riichi mahjong cup 2016 Moscow
16 684 2015-11-15 7/20 0% 1.30 RR Tournament of Saint Petersburg riichi mahjong league Saint Petersburg