Perfilev Roman
From Arkhangelsk, Russia
Common russian riichi rating (CRR)
Rating date Feb. 1, 2021 (latest changes Feb. 1, 2021).
146 place (132.75).
how we calculated rating score
max_coefficients = (4.05 * 0.86 + 2.90 * 1 + 3.85 * 0.71 + 3.45 * 0.71) = 11.585645
p1 = (363.64 * 2.20 * 0.14 + 545.45 * 2.50 * 0.57 + 0 + 0 + 0) / (2.20 * 0.14 + 2.50 * 0.57 + 1 + 1 + 1) = 188.387646324596
p2 = (545.45 * 2.50 * 0.57 + 363.64 * 2.20 * 0.14) / max_coefficients = 77.1212996773162
score = 188.387646324596 * 0.5 + 77.1212996773162 * 0.5 = 132.7544730009561
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2021-02-01 | 177 -> 146 | 276.26 -> 132.75 | |
| 2020-02-01 | 177 | 276.26 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 545 |
|
6/12 | 57% | 2.50 | CRR | Reversed Chun |
| 2 | 364 |
|
8/12 | 14% | 2.20 | CRR | Spring Tournament |
| 3 | 333 |
|
11/16 | 0% | 2.30 | RR | Arkhangelsk Championship |
| 4 | 333 |
|
11/16 | 0% | 1.40 | CRR | Winter riichi tournament |
| 5 | 600 |
|
7/16 | 0% | 1.60 | RR | Arkhangelsk riichi mahjong championship 2017 |
| 6 | 1000 |
|
1/16 | 0% | 1.60 | RR | Arkhangelsk riichi mahjong tournament 2016 |
| 7 | 400 |
|
10/16 | 0% | 1.60 | RR | Arkhangelsk riichi mahjong championship |