Chekan Vikmar
From Saint Petersburg, Russia
EMA: 15990345
Common russian riichi rating (CRR)
Rating date Jan. 5, 2025 (latest changes Jan. 5, 2025).
188 place (145.12).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (96.77 * 1.80 * 0.14 + 1000 * 1.40 * 0.29 + 485.98 * 4 * 0.57 + 21.74 * 2.10 * 1 + 21.05 * 3.85 * 1) / (1.80 * 0.14 + 1.40 * 0.29 + 4 * 0.57 + 2.10 * 1 + 3.85 * 1) = 186.929875854624
p2 = (485.98 * 4 * 0.57 + 1000 * 1.40 * 0.29 + 21.05 * 3.85 * 1 + 21.74 * 2.10 * 1) / max_coefficients = 103.30851735015773
score = 186.929875854624 * 0.5 + 103.30851735015773 * 0.5 = 145.11919660239084
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-01-04 | 185 -> 188 | 145.12 | |
| 2025-01-03 | 175 -> 185 | 162.91 -> 145.12 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-12-29 | 174 -> 175 | 162.91 | |
| 2024-12-25 | 174 | 161.61 -> 162.91 |
Earth cup: 29% -> 14% |
| 2024-12-22 | 172 -> 174 | 175.97 -> 161.61 |
Fire cup 2023: 43% -> 29% |
| 2024-12-01 | 171 -> 172 | 175.97 | |
| 2024-11-05 | 173 -> 171 | 175.97 | |
| 2024-11-04 | 172 -> 173 | 175.97 | |
| 2024-11-03 | 170 -> 172 | 192.01 -> 175.97 |
SPB Riichi Open 2023: 86% -> 71% |
| 2024-10-27 | 169 -> 170 | 192.01 |
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 | 57% | 4.00 | RR | SPB Riichi Open 2023 |
| 4 | 1000 |
|
1/24 | 29% | 1.40 | CRR | Fire cup 2023 |
| 5 | 97 |
|
29/32 | 14% | 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 |