Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Internal rating (RR)
Rating date March 31, 2025 (latest changes March 30, 2025).
183 place (80.98).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (485.98 * 4 * 0.43 + 21.74 * 2.10 * 0.86 + 21.05 * 3.85 * 1 + 0 + 0) / (4 * 0.43 + 2.10 * 0.86 + 3.85 * 1 + 1 + 1) = 101.80675351414038
p2 = (485.98 * 4 * 0.43 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.86) / max_coefficients = 60.148264984227126
score = 101.80675351414038 * 0.5 + 60.148264984227126 * 0.5 = 80.97750924918375
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-03-30 | 184 -> 183 | 79.94 -> 80.98 |
Seihoku spring tournament 2024: 100% -> 86% |
| 2025-03-03 | 183 -> 184 | 99.49 -> 79.94 |
SPB Riichi Open 2023: 57% -> 43% |
| 2025-03-02 | 180 -> 183 | 99.49 | |
| 2025-02-16 | 173 -> 180 | 99.49 | |
| 2025-02-02 | 167 -> 173 | 99.49 | |
| 2025-01-26 | 159 -> 167 | 99.49 | |
| 2025-01-07 | 156 -> 159 | 99.49 | |
| 2025-01-03 | 153 -> 156 | 117.90 -> 99.49 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-11-06 | 159 -> 153 | 117.90 | |
| 2024-11-03 | 155 -> 159 | 135.34 -> 117.90 |
SPB Riichi Open 2023: 86% -> 71% |
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 | 86% | 2.10 | RR | Seihoku spring tournament 2024 |
| 3 | 486 |
|
56/108 | 43% | 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 |