Matrosova Natalia

From Yekaterinburg, Russia

EMA: 15020064

Player page

Internal rating (RR)

Rating date Sept. 4, 2025 (latest changes Sept. 3, 2025).

129 place (327.12).

max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8

p1 = (242.99 * 4.60 * 0.71 + 489.36 * 2.80 * 0.86 + 303.80 * 3.65 * 0.86 + 0 * 3.85 * 0.86 + 258.06 * 2.40 * 1 + 610.39 * 3.45 * 1) / (4.60 * 0.71 + 2.80 * 0.86 + 3.65 * 0.86 + 3.85 * 0.86 + 2.40 * 1 + 3.45 * 1) = 314.4309896898838

p2 = (610.39 * 3.45 * 1 + 489.36 * 2.80 * 0.86 + 303.80 * 3.65 * 0.86 + 242.99 * 4.60 * 0.71) / max_coefficients = 339.8013513513513

score = 314.4309896898838 * 0.5 + 339.8013513513513 * 0.5 = 327.1161705206175

Rating changes

Show

all results
Date Place Points Reason
2025-09-03 132 -> 129 328.61 -> 327.12

SPB Riichi Open 2023: 14% -> 0%
2025-09-01 133 -> 132 319.56 -> 328.61

SPB Riichi Open 2024: 100% -> 86%
2025-08-31 165 -> 133 237.33 -> 319.56

SPB Riichi Open 2025: 0% -> 100%
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%

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 610 2025-08-31 31/78 100% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
2 258 2025-03-02 24/32 100% 2.40 RR Riichi Maslenitsa (shrovetide) Yekaterinburg
3 0 2024-09-01 96/96 86% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
4 304 2024-08-04 56/80 86% 3.65 RR Riichi over Volga Samara
5 489 2024-07-14 25/48 86% 2.80 RR Guardian of the Winds Yekaterinburg
6 243 2024-05-12 82/108 71% 4.60 RR X Russian Championship Perm
7 411 2023-09-03 64/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
8 195 2023-06-11 71/88 0% 3.75 RR Money can not buy tenpai Perm
9 672 2022-03-20 23/68 0% 3.50 RR Tenpai can't buy happiness Perm
10 609 2019-06-16 10/24 0% 2.20 RR URAL Mahjong Battle Yekaterinburg
11 211 2018-05-01 57/72 0% 3.85 EMA Haru Shanten 2018 Perm
12 70 2017-11-12 67/72 0% 3.25 EMA Perm Riichi 2017 Aki Shanten Perm
13 0 2017-07-30 24/24 0% 2.20 RR Summer EMA rules tournament 2017 Yekaterinburg