Bykov Dmitriy

From Saint Petersburg, Russia

EMA: 15990236

Player page

Common russian riichi rating (CRR)

Rating date July 25, 2025 (latest changes July 25, 2025).

257 place (110.98).

max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.35

p1 = (299.07 * 4 * 0.14 + 578.95 * 1.50 * 0.71 + 0 + 0 + 0) / (4 * 0.14 + 1.50 * 0.71 + 1 + 1 + 1) = 170.4181518613842

p2 = (578.95 * 1.50 * 0.71 + 299.07 * 4 * 0.14) / max_coefficients = 51.54788273615635

score = 170.4181518613842 * 0.5 + 51.54788273615635 * 0.5 = 110.98301729877028

Rating changes

Show

all results
Date Place Points Reason
2025-07-25 250 -> 257 124.03 -> 110.98

Duplicate riichi mahjong tournament 2024: 86% -> 71%
2025-07-13 248 -> 250 124.03
2025-07-12 249 -> 248 123.47 -> 124.03
2025-07-03 245 -> 249 134.75 -> 123.47

SPB Riichi Open 2023: 29% -> 14%
2025-06-22 246 -> 245 134.75
2025-06-15 238 -> 246 135.78 -> 134.75
2025-06-14 232 -> 238 135.78
2025-06-11 238 -> 232 135.78
2025-06-08 237 -> 238 135.78
2025-05-25 236 -> 237 147.06 -> 135.78

Duplicate riichi mahjong tournament 2024: 100% -> 86%

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 579 2024-05-25 9/20 71% 1.50 CRR Duplicate riichi mahjong tournament 2024 Moscow
2 299 2023-09-03 76/108 14% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
3 747 2021-11-28 20/76 0% 3.45 RR Saint Petersburg Open 2021 Saint Petersburg
4 635 2019-11-24 24/64 0% 3.45 EMA Saint Petersburg Open 2019 Saint Petersburg
5 692 2018-12-23 13/40 0% 2.90 RR North Cup 2018 Saint Petersburg
6 873 2018-06-11 10/72 0% 3.55 EMA RCR Saint Petersburg South Cup 2018 Saint Petersburg
7 742 2018-03-04 9/32 0% 2.70 RR East Cup 2018 Saint Petersburg
8 506 2017-12-11 42/84 0% 3.40 EMA VI Russian Riichi Championship 2017 Saint Petersburg
9 103 2017-10-01 36/40 0% 1.80 RR Saint Petersburg championship. Northern cup 2017 Saint Petersburg
10 282 2017-06-03 29/40 0% 1.80 RR Saint Petersburg championship. West cup 2017 Saint Petersburg
11 860 2017-03-18 7/44 0% 1.90 RR Saint Petersburg championship. South cup 2017 Saint Petersburg
12 183 2016-12-04 59/72 0% 3.25 EMA Saint Petersburg Riichi Open 2016 Saint Petersburg
13 0 2016-10-16 32/32 0% 1.60 RR Tournament of 4 winds. West cup 2016 Saint Petersburg
14 770 2016-09-11 21/88 0% 3.45 EMA V Russian Riichi Championship 2016 Moscow
15 1000 2016-07-03 🥇 1/24 0% 1.40 RR Tournament of 4 winds. South cup 2016 Saint Petersburg
16 596 2016-03-13 41/100 0% 3.40 RR "Japanese House" riichi mahjong cup 2016 Moscow
17 282 2016-02-22 29/40 0% 2.60 EMA Ivanovo Region Riichi Championship 2016 Ivanovo
18 158 2015-11-15 17/20 0% 1.30 RR Tournament of Saint Petersburg riichi mahjong league Saint Petersburg
19 451 2015-10-18 29/52 0% 2.90 EMA Russian Open Riichi Championship 2015 Vologda
20 886 2015-08-22 5/36 0% 1.70 EMA Nizhny Novgorod Riichi Championship 2015 Nizhny Novgorod
21 684 2015-03-15 7/20 0% 2.10 RR Nizhny Novgorod riichi mahjong tournament Nizhny Novgorod