Dubrovin Sergey

From Saint Petersburg, Russia

EMA: 15990313

Player page

Common russian riichi rating (CRR)

Rating date March 31, 2025 (latest changes March 30, 2025).

256 place (50.33).

max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85

p1 = (347.83 * 1.40 * 0.14 + 173.91 * 2.10 * 0.86 + 0 + 0 + 0) / (1.40 * 0.14 + 2.10 * 0.86 + 1 + 1 + 1) = 76.52445914675488

p2 = (173.91 * 2.10 * 0.86 + 347.83 * 1.40 * 0.14) / max_coefficients = 24.140063091482652

score = 76.52445914675488 * 0.5 + 24.140063091482652 * 0.5 = 50.33226111911877

Rating changes

Show

all results
Date Place Points Reason
2025-03-30 253 -> 256 54.74 -> 50.33

Seihoku spring tournament 2024: 100% -> 86%
2025-03-29 247 -> 253 54.74
2025-03-23 235 -> 247 54.74
2025-03-02 234 -> 235 54.74
2025-02-25 236 -> 234 54.74
2025-02-22 234 -> 236 61.76 -> 54.74

Fire cup 2023: 29% -> 14%
2025-02-16 229 -> 234 61.76
2025-02-11 231 -> 229 61.76
2025-02-02 225 -> 231 61.76
2025-01-26 216 -> 225 61.76

Tournaments

# Base rank Date Place Power Coefficient Type Tournament
1 174 2024-03-30 39/47 86% 2.10 RR Seihoku spring tournament 2024
2 348 2023-04-22 16/24 14% 1.40 CRR Fire cup 2023
3 410 2018-12-23 24/40 0% 2.90 RR North Cup 2018
4 391 2018-09-23 15/24 0% 2.50 RR West cup 2018
5 592 2018-06-11 30/72 0% 3.55 EMA RCR Saint Petersburg South Cup 2018
6 290 2018-03-04 23/32 0% 2.70 RR East Cup 2018
7 410 2017-12-11 50/84 0% 3.40 EMA VI Russian Riichi Championship 2017
8 641 2017-06-03 15/40 0% 1.80 RR Saint Petersburg championship. West cup 2017
9 209 2017-03-18 35/44 0% 1.90 RR Saint Petersburg championship. South cup 2017
10 14 2016-12-04 71/72 0% 3.25 EMA Saint Petersburg Riichi Open 2016