Matrosova Natalia
From Yekaterinburg, Russia
EMA: 15020064
Internal rating (RR)
Rating date Aug. 9, 2025 (latest changes Aug. 9, 2025).
165 place (237.33).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (411.21 * 4 * 0.14 + 242.99 * 4.60 * 0.71 + 489.36 * 2.80 * 0.86 + 303.80 * 3.65 * 0.86 + 0 * 3.85 * 1 + 258.06 * 2.40 * 1) / (4 * 0.14 + 4.60 * 0.71 + 2.80 * 0.86 + 3.65 * 0.86 + 3.85 * 1 + 2.40 * 1) = 241.60261709200276
p2 = (489.36 * 2.80 * 0.86 + 303.80 * 3.65 * 0.86 + 242.99 * 4.60 * 0.71 + 258.06 * 2.40 * 1) / max_coefficients = 233.06381578947367
score = 241.60261709200276 * 0.5 + 233.06381578947367 * 0.5 = 237.33321644073823
Rating changes
Date | Place | Points | Reason |
---|---|---|---|
2025-08-04 | 162 -> 165 | 242.36 -> 237.33 |
Riichi over Volga: 100% -> 86% |
2025-08-03 | 156 -> 162 | 242.36 | |
2025-07-30 | 160 -> 156 | 242.36 | |
2025-07-14 | 155 -> 160 | 251.71 -> 242.36 |
Guardian of the Winds: 100% -> 86% |
2025-07-13 | 153 -> 155 | 251.71 | |
2025-07-12 | 150 -> 153 | 254.31 -> 251.71 |
X Russian Championship: 86% -> 71% |
2025-07-03 | 150 | 256.91 -> 254.31 |
SPB Riichi Open 2023: 29% -> 14% |
2025-06-15 | 140 -> 150 | 260.75 -> 256.91 | |
2025-06-11 | 148 -> 140 | 259.89 -> 260.75 |
Money can not buy tenpai: 14% -> 0% |
2025-06-08 | 147 -> 148 | 259.89 |
Tournaments
# | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
---|---|---|---|---|---|---|---|---|---|
1 | 258 |
|
24/32 | 100% | 2.40 | RR | Riichi Maslenitsa (shrovetide) | Yekaterinburg | |
2 | 0 |
|
96/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
3 | 304 |
|
56/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
4 | 489 |
|
25/48 | 86% | 2.80 | RR | Guardian of the Winds | Yekaterinburg | |
5 | 243 |
|
82/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
6 | 411 |
|
64/108 | 14% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
7 | 195 |
|
71/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
8 | 672 |
|
23/68 | 0% | 3.50 | RR | Tenpai can't buy happiness | Perm | |
9 | 609 |
|
10/24 | 0% | 2.20 | RR | URAL Mahjong Battle | Yekaterinburg | |
10 | 211 |
|
57/72 | 0% | 3.85 | EMA | Haru Shanten 2018 | Perm | |
11 | 70 |
|
67/72 | 0% | 3.25 | EMA | Perm Riichi 2017 Aki Shanten | Perm | |
12 | 0 |
|
24/24 | 0% | 2.20 | RR | Summer EMA rules tournament 2017 | Yekaterinburg |