Dubrovin Sergey
From Saint Petersburg, Russia
EMA: 15990313
Common russian riichi rating (CRR)
Rating date Aug. 20, 2024 (latest changes Aug. 20, 2024).
190 place (81.75).
how we calculated rating score
max_coefficients = (4.60 * 1 + 4 * 1 + 3.65 * 1 + 3.05 * 1) = 15.3
p1 = (347.83 * 1.40 * 0.71 + 173.91 * 2.10 * 1 + 0 + 0 + 0) / (1.40 * 0.71 + 2.10 * 1 + 1 + 1 + 1) = 116.89305936701847
p2 = (173.91 * 2.10 * 1 + 347.83 * 1.40 * 0.71) / max_coefficients = 46.604575163398685
score = 116.89305936701847 * 0.5 + 46.604575163398685 * 0.5 = 81.74881726520857
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2024-08-20 | 192 -> 190 | 81.75 | |
| 2024-08-11 | 192 | 81.50 -> 81.75 | |
| 2024-08-04 | 189 -> 192 | 82.43 -> 81.50 | |
| 2024-07-14 | 184 -> 189 | 82.43 | |
| 2024-07-09 | 185 -> 184 | 82.43 | |
| 2024-07-06 | 186 -> 185 | 82.43 | |
| 2024-07-03 | 187 -> 186 | 82.43 | |
| 2024-06-22 | 185 -> 187 | 88.44 -> 82.43 |
Fire cup 2023: 86% -> 71% |
| 2024-06-11 | 194 -> 185 | 87.52 -> 88.44 | |
| 2024-06-09 | 189 -> 194 | 87.52 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 174 |
|
39/47 | 100% | 2.10 | RR | Seihoku spring tournament 2024 |
| 2 | 348 |
|
16/24 | 71% | 1.40 | CRR | Fire cup 2023 |
| 3 | 410 |
|
24/40 | 0% | 2.90 | RR | North Cup 2018 |
| 4 | 391 |
|
15/24 | 0% | 2.50 | RR | West cup 2018 |
| 5 | 592 |
|
30/72 | 0% | 3.55 | EMA | RCR Saint Petersburg South Cup 2018 |
| 6 | 290 |
|
23/32 | 0% | 2.70 | RR | East Cup 2018 |
| 7 | 410 |
|
50/84 | 0% | 3.40 | EMA | VI Russian Riichi Championship 2017 |
| 8 | 641 |
|
15/40 | 0% | 1.80 | RR | Saint Petersburg championship. West cup 2017 |
| 9 | 209 |
|
35/44 | 0% | 1.90 | RR | Saint Petersburg championship. South cup 2017 |
| 10 | 14 |
|
71/72 | 0% | 3.25 | EMA | Saint Petersburg Riichi Open 2016 |