Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date March 31, 2025 (latest changes March 30, 2025).
237 place (103.72).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (1000 * 1.40 * 0.14 + 485.98 * 4 * 0.43 + 21.74 * 2.10 * 0.86 + 21.05 * 3.85 * 1 + 0) / (1.40 * 0.14 + 4 * 0.43 + 2.10 * 0.86 + 3.85 * 1 + 1) = 134.67540519617907
p2 = (485.98 * 4 * 0.43 + 1000 * 1.40 * 0.14 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 0.86) / max_coefficients = 72.77034700315458
score = 134.67540519617907 * 0.5 + 72.77034700315458 * 0.5 = 103.72287609966682
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-03-30 | 237 | 102.02 -> 103.72 |
Seihoku spring tournament 2024: 100% -> 86% |
| 2025-03-29 | 233 -> 237 | 102.02 | |
| 2025-03-23 | 221 -> 233 | 102.02 | |
| 2025-03-05 | 222 -> 221 | 102.02 | |
| 2025-03-03 | 214 -> 222 | 121.52 -> 102.02 |
SPB Riichi Open 2023: 57% -> 43% |
| 2025-03-02 | 213 -> 214 | 121.52 | |
| 2025-03-01 | 214 -> 213 | 121.52 | |
| 2025-02-26 | 215 -> 214 | 121.52 | |
| 2025-02-25 | 212 -> 215 | 129.46 -> 121.52 |
Earth cup: 14% -> 0% |
| 2025-02-22 | 211 -> 212 | 145.12 -> 129.46 |
Fire cup 2023: 29% -> 14% |
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 | 1000 |
|
1/24 | 14% | 1.40 | CRR | Fire cup 2023 |
| 5 | 97 |
|
29/32 | 0% | 1.80 | CRR | Earth cup |
| 6 | 410 |
|
24/40 | 0% | 1.80 | CRR | Sun tournament |
| 7 | 721 |
|
32/112 | 0% | 4.05 | EMA | VIII Russian Riichi Championship |
| 8 | 571 |
|
28/64 | 0% | 3.45 | EMA | Saint Petersburg Open 2019 |
| 9 | 692 |
|
13/40 | 0% | 2.90 | RR | Summer Cup 2019 |
| 10 | 590 |
|
17/40 | 0% | 2.90 | RR | North Cup 2018 |
| 11 | 677 |
|
11/32 | 0% | 2.70 | RR | East Cup 2018 |
| 12 | 108 |
|
75/84 | 0% | 3.40 | EMA | VI Russian Riichi Championship 2017 |
| 13 | 1000 |
|
1/40 | 0% | 1.80 | RR | Saint Petersburg championship. Northern cup 2017 |
| 14 | 1000 |
|
1/40 | 0% | 1.80 | RR | Saint Petersburg championship. West cup 2017 |
| 15 | 977 |
|
2/44 | 0% | 1.90 | RR | Saint Petersburg championship. South cup 2017 |
| 16 | 533 |
|
8/16 | 0% | 1.20 | RR | Riichi mahjong league tournament 2016 (JPML-A rules) |
| 17 | 162 |
|
84/100 | 0% | 3.40 | RR | "Japanese House" riichi mahjong cup 2016 |
| 18 | 684 |
|
7/20 | 0% | 1.30 | RR | Tournament of Saint Petersburg riichi mahjong league |