Matrosova Natalia

From Yekaterinburg, Russia

EMA: 15020064

Player page

Internal rating (RR)

Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).

151 place (280.84).

max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95

p1 = (242.99 * 4.60 * 0.43 + 489.36 * 2.80 * 0.57 + 303.80 * 3.65 * 0.57 + 0 * 3.85 * 0.71 + 258.06 * 2.40 * 1 + 610.39 * 3.45 * 1 + 140.35 * 3.90 * 1) / (4.60 * 0.43 + 2.80 * 0.57 + 3.65 * 0.57 + 3.85 * 0.71 + 2.40 * 1 + 3.45 * 1 + 3.90 * 1) = 284.6356076354515

p2 = (610.39 * 3.45 * 1 + 489.36 * 2.80 * 0.57 + 303.80 * 3.65 * 0.57 + 258.06 * 2.40 * 1) / max_coefficients = 277.0387959866221

score = 284.6356076354515 * 0.5 + 277.0387959866221 * 0.5 = 280.83720181103683

Rating changes

Show

all results
Date Place Points Reason
2025-12-09 152 -> 151 280.84
2025-12-07 147 -> 152 280.84
2025-12-04 145 -> 147 286.40 -> 280.84

Riichi over Volga: 71% -> 57%
2025-11-30 146 -> 145 286.40
2025-11-14 140 -> 146 295.09 -> 286.40

Guardian of the Winds: 71% -> 57%
2025-11-12 143 -> 140 294.97 -> 295.09

X Russian Championship: 57% -> 43%
2025-11-04 129 -> 143 320.00 -> 294.97

XI Russian Championship: 0% -> 100%
2025-11-01 132 -> 129 314.01 -> 320.00

SPB Riichi Open 2024: 86% -> 71%
2025-10-13 132 309.23 -> 314.01
2025-10-04 133 -> 132 314.43 -> 309.23

Riichi over Volga: 86% -> 71%

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 140 2025-11-04 50/58 100% 3.90 RR XI Russian Championship Moscow
2 610 2025-08-31 31/78 100% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
3 258 2025-03-02 24/32 100% 2.40 RR Riichi Maslenitsa (shrovetide) Yekaterinburg
4 0 2024-09-01 96/96 71% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
5 304 2024-08-04 56/80 57% 3.65 RR Riichi over Volga Samara
6 489 2024-07-14 25/48 57% 2.80 RR Guardian of the Winds Yekaterinburg
7 243 2024-05-12 82/108 43% 4.60 RR X Russian Championship Perm
8 411 2023-09-03 64/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
9 195 2023-06-11 71/88 0% 3.75 RR Money can not buy tenpai Perm
10 672 2022-03-20 23/68 0% 3.50 RR Tenpai can't buy happiness Perm
11 609 2019-06-16 10/24 0% 2.20 RR URAL Mahjong Battle Yekaterinburg
12 211 2018-05-01 57/72 0% 3.85 EMA Haru Shanten 2018 Perm
13 70 2017-11-12 67/72 0% 3.25 EMA Perm Riichi 2017 Aki Shanten Perm
14 0 2017-07-30 24/24 0% 2.20 RR Summer EMA rules tournament 2017 Yekaterinburg