Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date Sept. 6, 2024 (latest changes Sept. 6, 2024).
142 place (136.51).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.65 * 1 + 4 * 0.86) = 15.5284
p1 = (485.98 * 4 * 0.86 + 21.74 * 2.10 * 1 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.86 + 2.10 * 1 + 3.85 * 1 + 1 + 1) = 157.5652112775083
p2 = (485.98 * 4 * 0.86 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 1) / max_coefficients = 115.4555524072023
score = 157.5652112775083 * 0.5 + 115.4555524072023 * 0.5 = 136.5103818423553
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-09-06 | 144 -> 142 | 136.51 | |
| 2024-09-03 | 142 -> 144 | 150.94 -> 136.51 |
SPB Riichi Open 2023: 100% -> 86% |
| 2024-09-01 | 126 -> 142 | 174.34 -> 150.94 |
SPB Riichi Open 2024: 0% -> 100% |
| 2024-08-11 | 125 -> 126 | 173.65 -> 174.34 | |
| 2024-08-04 | 122 -> 125 | 176.24 -> 173.65 | |
| 2024-07-14 | 119 -> 122 | 176.24 | |
| 2024-07-06 | 121 -> 119 | 176.24 | |
| 2024-06-11 | 129 -> 121 | 173.91 -> 176.24 | |
| 2024-06-09 | 117 -> 129 | 173.91 | |
| 2024-05-12 | 93 -> 117 | 186.43 -> 173.91 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 21 |
|
94/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 |
| 2 | 22 |
|
46/47 | 100% | 2.10 | RR | Seihoku spring tournament 2024 |
| 3 | 486 |
|
56/108 | 86% | 4.00 | RR | SPB Riichi Open 2023 |
| 4 | 721 |
|
32/112 | 0% | 4.05 | EMA | VIII Russian Riichi Championship |
| 5 | 571 |
|
28/64 | 0% | 3.45 | EMA | Saint Petersburg Open 2019 |
| 6 | 692 |
|
13/40 | 0% | 2.90 | RR | Summer Cup 2019 |
| 7 | 590 |
|
17/40 | 0% | 2.90 | RR | North Cup 2018 |
| 8 | 677 |
|
11/32 | 0% | 2.70 | RR | East Cup 2018 |
| 9 | 108 |
|
75/84 | 0% | 3.40 | EMA | VI Russian Riichi Championship 2017 |
| 10 | 1000 |
|
1/40 | 0% | 1.80 | RR | Saint Petersburg championship. Northern cup 2017 |
| 11 | 1000 |
|
1/40 | 0% | 1.80 | RR | Saint Petersburg championship. West cup 2017 |
| 12 | 977 |
|
2/44 | 0% | 1.90 | RR | Saint Petersburg championship. South cup 2017 |
| 13 | 533 |
|
8/16 | 0% | 1.20 | RR | Riichi mahjong league tournament 2016 (JPML-A rules) |
| 14 | 162 |
|
84/100 | 0% | 3.40 | RR | "Japanese House" riichi mahjong cup 2016 |
| 15 | 684 |
|
7/20 | 0% | 1.30 | RR | Tournament of Saint Petersburg riichi mahjong league |