PLAYER PAGE

Personal

Grobbelaar, M (Mienje)

Chess SA id

2140158377

FIDE id

?

Date of birth

2014-03-05 (U12)

Gender

Female

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-09-27

Personal details last changed

1900-01-01

Junior GPX Games

87

Junior GPX Points

1457.7

Item Main Standard Rapid Blitz
Rating 1605.9 1604.2 1200 1200
Raw rating 1570.9 1578.1 1200 1200
Weighted rating 1447.4 1445.1 1200 1200
Weighted performance 1605.9 1604.2 0 0
Floor 1072.5 1080 700 700
K-factor 32 32 36 36
Min/Max rating change allowed 97.8 96.8 165.8 165.8
Highest rating 1605.9
2025-09-30
1604.2
2025-09-30
1200
2018-10-01
1200
2018-10-01
Highest raw rating 1572.5
2025-09-01
1580
2025-09-01
1200
2024-02-01
1200
2024-02-01
Highest weighted rating 1447.4
2025-09-30
1445.1
2025-09-30
1200
2018-10-01
1200
2018-10-01
Highest weighted performance 1605.9
2025-09-30
1604.2
2025-09-30
1200
2024-02-01
1200
2024-02-01

Prediction
Item Main Standard Rapid Blitz
Rating change -0.6 -0.6 0 0
New rating 1605.4 1603.7 1200 1200
Analysis
Rating 1605.9 1604.2 1200 1200
Raw rating 1570.9 1578.1 1200 1200
Weighted rating 1447.4 1445.1 1200
Weighted performance 1605.9 1604.2 0
K-factor 32 32 36 36
Floor 1072.5 1080 700 700
Max/Min rating change allowed 97.8 96.8 165.8 165.8
Games 0 0 0 0
Score 0 0 0 0
Expected score 0 0 0 0
Score-Expected 0 0 0 0
Temp raw +/- 0 0 0 0
Final raw +/- 0 0 0 0
New raw rating 1570.9 1578.1 1200 1200
New weighted rating 1459.8 1458.4 1200 1200
New weighted performance 1605.4 1603.7 0 0
Temp new rating 1605.4 1603.7 1200 1200
Temp new rating +/- -0.6 -0.6 0 0
Final new rating +/- -0.6 -0.6 0 0
New rating 1605.4 1603.7 1200 1200
New K-factor 32 32 36 36
New floor 1072.5 1080 700 700

Item Main Standard Rapid Blitz
0 0 0 0
77 77 0 0
90 90 0 0
41 41 0 0
0 0 0 0
0 0 0 0
History 208 208 0 0

Games since
Main
177
Standard
177
Rapid
0
Blitz
0
Gender Female
Age group U12
Region Tshwane (GTP)
Province Gauteng (GT)
Main
RSA Province Region
Overall 623 237 91
Female 52 18 6
U12 42 17 8
U12 Female 7 3 2
Standard
RSA Province Region
Overall 587 230 88
Female 44 16 4
U12 41 18 8
U12 Female 7 3 2
Rapid
RSA Province Region
Overall -1 -1 -1
Female -1 -1 -1
U12 -1 -1 -1
U12 Female -1 -1 -1
Blitz
RSA Province Region
Overall -1 -1 -1
Female -1 -1 -1
U12 -1 -1 -1
U12 Female -1 -1 -1

Games Score % Dp AvgOpp Performance
Main 0 0 0 0 0 0
Standard 0 0 0 0 0 0
Rapid 0 0 0 0 0 0
Blitz 0 0 0 0 0 0
Games Score % Dp AvgOpp Performance
Main 77 51.5 66.88 143.5 1380 1523.5
Standard 77 51.5 66.88 143.5 1380 1523.5
Rapid 0 0 0 0 0 0
Blitz 0 0 0 0 0 0
History
Games Score % Dp AvgOpp Performance
Main 208 132.5 63.7 116.5 1316.9 1433.3
Standard 208 132.5 63.7 116.5 1316.9 1433.3
Rapid 0 0 0 0 0 0
Blitz 0 0 0 0 0 0

Date Main Standard Rapid Blitz
2025-09-30 1570.9 1578.1 1200 1200
2025-09-01 1572.5 1580 1200 1200
2025-08-01 1512 1507.2 1200 1200
2025-07-01 1489.3 1486.1 1200 1200
2025-06-01 1478.2 1483.6 1200 1200
2025-05-01 1413.9 1404.2 1200 1200
2025-04-01 1413.9 1404.2 1200 1200
2025-03-01 1483.7 1480.5 1200 1200
2025-02-01 1475.9 1472.3 1200 1200
2025-01-01 1416.1 1418.5 1200 1200
2024-12-01 1392.4 1393.3 1200 1200
2024-11-01 1383.4 1383.2 1200 1200
2024-10-01 1383.4 1383.2 1200 1200
2024-09-01 1359.4 1353.7 1200 1200
2024-08-01 1385.1 1383.2 1200 1200
2024-07-01 1369 1363.8 1200 1200
2024-06-01 1370.8 1363.1 1200 1200
2024-08-01 1322.2 1305.5 1200 1200
2024-04-01 1322.2 1305.5 1200 1200
2024-03-01 1340.8 1324.6 1200 1200
2024-02-01 1363.5 1350.9 1200 1200
2024-01-01 1390.4 1386.9 1200 1200
2023-12-01 1390.4 1386.9 1200 1200
2023-11-01 1390.4 1386.9 1200 1200

Comming soon.

Tournaments

No tournaments found.
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 2025 Centurion Chess Open Tournament (U12) 2025-09-27 2025-09-27 Standard Tshwane (GTP) 5 5 4 Yes Analysis
2 2025 Tshwane South School District CLOSED League Championship (U11A) 2025-08-15 2025-08-15 Standard Tshwane (GTP) 5 5 5 Yes Analysis
3 2025 Etienne Lewis Closed Chess Tournament (U12) 2025-08-08 2025-08-10 Standard Tshwane (GTP) 7 7 4.5 Yes Analysis
4 2025 Wynie Robbertse Chess Tournament (U12) 2025-07-19 2025-07-19 Standard Tshwane (GTP) 5 5 3 Yes Analysis
5 South African Open 2025 (U12 Girls) 2025-07-03 2025-07-05 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
6 Third Knight Riders Junior Open 2025 (B+C) 2025-06-22 2025-06-22 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
7 2025 Elise Steenkamp Open Chess Tournament (Bishop) 2025-06-14 2025-06-15 Standard Tshwane (GTP) 5 5 4 Yes Analysis
8 2025 Tshwane South School District Individual Finals (D4) (U11 Girls) 2025-05-10 2025-05-10 Standard Tshwane (GTP) 5 5 4 Yes Analysis
9 2025 Silver Lakes Chess Club Open Chess Tournament (U12) 2025-05-03 2025-05-03 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
10 Lubowski Open 2025 (C) 2025-03-21 2025-03-22 Standard Tshwane (GTP) 5 5 1 Yes Analysis
11 2025 Chris Greyling Open Chess Tournament (U12) 2025-03-15 2025-03-15 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
12 AHS Open Chess Tournament 2025 (U12) 2025-03-01 2025-03-01 Standard Tshwane (GTP) 5 5 3 Yes Analysis
13 Constantiapark Open 2025 (U12) 2025-02-15 2025-02-15 Standard Tshwane (GTP) 5 5 4 Yes Analysis
14 2025 Blou Bul Open Chess Tournament (C) 2025-02-08 2025-02-08 Standard Tshwane (GTP) 5 5 2 Yes Analysis
15 2025 Tshwane Chess OPEN Registration Tournament (U12) 2025-01-25 2025-01-25 Standard Tshwane (GTP) 5 5 4 Yes Analysis
Last 500 tournaments since 01 January 2018
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 2025 Centurion Chess Open Tournament (U12) 2025-09-27 2025-09-27 Standard Tshwane (GTP) 5 5 4 Yes Analysis
2 2025 Tshwane South School District CLOSED League Championship (U11A) 2025-08-15 2025-08-15 Standard Tshwane (GTP) 5 5 5 Yes Analysis
3 2025 Etienne Lewis Closed Chess Tournament (U12) 2025-08-08 2025-08-10 Standard Tshwane (GTP) 7 7 4.5 Yes Analysis
4 2025 Wynie Robbertse Chess Tournament (U12) 2025-07-19 2025-07-19 Standard Tshwane (GTP) 5 5 3 Yes Analysis
5 South African Open 2025 (U12 Girls) 2025-07-03 2025-07-05 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
6 Third Knight Riders Junior Open 2025 (B+C) 2025-06-22 2025-06-22 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
7 2025 Elise Steenkamp Open Chess Tournament (Bishop) 2025-06-14 2025-06-15 Standard Tshwane (GTP) 5 5 4 Yes Analysis
8 2025 Tshwane South School District Individual Finals (D4) (U11 Girls) 2025-05-10 2025-05-10 Standard Tshwane (GTP) 5 5 4 Yes Analysis
9 2025 Silver Lakes Chess Club Open Chess Tournament (U12) 2025-05-03 2025-05-03 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
10 Lubowski Open 2025 (C) 2025-03-21 2025-03-22 Standard Tshwane (GTP) 5 5 1 Yes Analysis
11 2025 Chris Greyling Open Chess Tournament (U12) 2025-03-15 2025-03-15 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
12 AHS Open Chess Tournament 2025 (U12) 2025-03-01 2025-03-01 Standard Tshwane (GTP) 5 5 3 Yes Analysis
13 Constantiapark Open 2025 (U12) 2025-02-15 2025-02-15 Standard Tshwane (GTP) 5 5 4 Yes Analysis
14 2025 Blou Bul Open Chess Tournament (C) 2025-02-08 2025-02-08 Standard Tshwane (GTP) 5 5 2 Yes Analysis
15 2025 Tshwane Chess OPEN Registration Tournament (U12) 2025-01-25 2025-01-25 Standard Tshwane (GTP) 5 5 4 Yes Analysis
16 Gauteng Inter-Region at UJ 2024 (U12 Girls) 2024-12-07 2024-12-08 Standard Johannesburg Metro (GJM) 5 5 3.5 Yes Analysis
17 Lardies Ope 2024 (U12) 2024-10-26 2024-10-26 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
18 2024 Tuks Open Chess Tournament (U12) 2024-09-28 2024-09-28 Standard Tshwane (GTP) 5 5 3 Yes Analysis
19 2024 Etienne Lewis (U12) 2024-08-30 2024-09-01 Standard Tshwane (GTP) 7 7 4 Yes Analysis
20 2024 Jacaranda Round Robin Open Chess Tournament (E) 2024-08-17 2024-08-17 Standard Tshwane (GTP) 5 5 1 Yes Analysis
21 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U11A) 2024-08-03 2024-08-03 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
22 Eureka Open 27 July 2024 (G) 2024-07-27 2024-07-27 Standard Sedibeng (GSV) 5 5 3.5 Yes Analysis
23 Menlopark Open Chess Tournament 2024 (U12) 2024-07-13 2024-07-13 Standard Tshwane (GTP) 5 5 3 Yes Analysis
24 2024 African Youth Chess Championship 2024-06-16 2024-06-22 Standard Tshwane (GTP) 9 9 5 Yes Analysis
25 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (D) 2024-06-01 2024-06-01 Standard Tshwane (GTP) 5 5 3 Yes Analysis
26 2024 Tshwane South School District CLOSED Individual Championships (U11 Girls) 2024-05-11 2024-05-11 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
27 South African Junior Closed Chess Championship 2024 (U10 Girls) 2024-04-27 2024-05-01 Standard Ekurhuleni (GE) 9 9 5 Yes Analysis
28 2024 Lubowski Open Chess Tournament (D2) 2024-03-23 2024-03-24 Standard Tshwane (GTP) 5 5 3 Yes Analysis
29 2024 Constantiapark Open (D2) 2024-02-17 2024-02-17 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
30 2024 Tshwane Chess OPEN Registration Tournament (D1) 2024-01-27 2024-01-27 Standard Tshwane (GTP) 5 5 2 Yes Analysis
31 2024 Gauteng Inter-Region Chess Championship (U10B) 2024-01-13 2024-01-14 Standard Tshwane (GTP) 5 5 4 Yes Analysis
32 Lardies Open Tournament 2023 (D2) 2023-10-28 2023-10-28 Standard Tshwane (GTP) 5 5 2 Yes Analysis
33 2023 Gauteng Noord (E) 2023-10-14 2023-10-14 Standard Tshwane (GTP) 5 5 5 Yes Analysis
34 2023 Centurion Chess Open (E) 2023-09-23 2023-09-23 Standard Tshwane (GTP) 5 5 3 Yes Analysis
35 2023 Alekhine Open Tournament (E+F) 2023-09-09 2023-09-09 Standard Tshwane (GTP) 5 5 4 Yes Analysis
36 2023 Woman's Day Open Chess Tournament (Bishop) 2023-08-09 2023-08-09 Standard Tshwane (GTP) 5 5 4 Yes Analysis
37 2023 Etienne Lewis Closed Tournament (U10) 2023-08-25 2023-08-27 Standard Tshwane (GTP) 7 7 3 Yes Analysis
38 2023 Tshwane South School District CLOSED League Championship (U9) 2023-07-29 2023-07-29 Standard Tshwane (GTP) 5 4 2 Yes Analysis
39 2023 Menlo Open Tournament (E) 2023-07-22 2023-07-22 Standard Tshwane (GTP) 5 5 5 Yes Analysis

Top 3 Streaks

# Games Start End
1 7 Tournament
2025 Silver Lakes Chess Club Open Chess Tournament
Tournament
2025 Tshwane South School District Individual Finals (D4)
date
2025-05-03
rnd
3
type
Standard
result
1
date
2025-05-10
rnd
4
type
Standard
result
1
Opponent
Boshoff, M (Milah)
Opponent
Keyter, A (Alissa)
2 6 Tournament
2025 Etienne Lewis Closed Chess Tournament
Tournament
2025 Tshwane South School District CLOSED League Championship
date
2025-08-10
rnd
7
type
Standard
result
1
date
2025-08-15
rnd
5
type
Standard
result
1
Opponent
Van Wyk, W (Wouter)
Opponent
Mahlangu, S (Sibusiso)
3 6 Tournament
Constantiapark Open 2025
Tournament
AHS Open Chess Tournament 2025
date
2025-02-15
rnd
3
type
Standard
result
1
date
2025-03-01
rnd
3
type
Standard
result
1
Opponent
Botha, G (Gregory)
Opponent
Rahlaga, K (Kaelo Alupheli)
# Games Start End
1 7 Tournament
2025 Silver Lakes Chess Club Open Chess Tournament
Tournament
2025 Tshwane South School District Individual Finals (D4)
date
2025-05-03
rnd
3
type
Standard
result
1
date
2025-05-10
rnd
4
type
Standard
result
1
Opponent
Boshoff, M (Milah)
Opponent
Keyter, A (Alissa)
2 6 Tournament
2025 Etienne Lewis Closed Chess Tournament
Tournament
2025 Tshwane South School District CLOSED League Championship
date
2025-08-10
rnd
7
type
Standard
result
1
date
2025-08-15
rnd
5
type
Standard
result
1
Opponent
Van Wyk, W (Wouter)
Opponent
Mahlangu, S (Sibusiso)
3 6 Tournament
Constantiapark Open 2025
Tournament
AHS Open Chess Tournament 2025
date
2025-02-15
rnd
3
type
Standard
result
1
date
2025-03-01
rnd
3
type
Standard
result
1
Opponent
Botha, G (Gregory)
Opponent
Rahlaga, K (Kaelo Alupheli)
No games found.
# Games Start End
No games found.
# Games Start End
# Games Start End
1 6 Tournament
2025 Etienne Lewis Closed Chess Tournament
Tournament
2025 Tshwane South School District CLOSED League Championship
date
2025-08-10
rnd
7
type
Standard
result
1
date
2025-08-15
rnd
5
type
Standard
result
1
Opponent
Van Wyk, W (Wouter)
Opponent
Mahlangu, S (Sibusiso)
2 6 Tournament
Constantiapark Open 2025
Tournament
AHS Open Chess Tournament 2025
date
2025-02-15
rnd
3
type
Standard
result
1
date
2025-03-01
rnd
3
type
Standard
result
1
Opponent
Botha, G (Gregory)
Opponent
Rahlaga, K (Kaelo Alupheli)
3 6 Tournament
2023 Gauteng Noord
Tournament
Lardies Open Tournament 2023
date
2023-10-14
rnd
1
type
Standard
result
1
date
2023-10-28
rnd
1
type
Standard
result
1
Opponent
Westermann, I (Inge)
Opponent
Potgieter, R (Raven)
# Games Start End
1 6 Tournament
2025 Etienne Lewis Closed Chess Tournament
Tournament
2025 Tshwane South School District CLOSED League Championship
date
2025-08-10
rnd
7
type
Standard
result
1
date
2025-08-15
rnd
5
type
Standard
result
1
Opponent
Van Wyk, W (Wouter)
Opponent
Mahlangu, S (Sibusiso)
2 6 Tournament
Constantiapark Open 2025
Tournament
AHS Open Chess Tournament 2025
date
2025-02-15
rnd
3
type
Standard
result
1
date
2025-03-01
rnd
3
type
Standard
result
1
Opponent
Botha, G (Gregory)
Opponent
Rahlaga, K (Kaelo Alupheli)
3 6 Tournament
2023 Gauteng Noord
Tournament
Lardies Open Tournament 2023
date
2023-10-14
rnd
1
type
Standard
result
1
date
2023-10-28
rnd
1
type
Standard
result
1
Opponent
Westermann, I (Inge)
Opponent
Potgieter, R (Raven)
No games found.
# Games Start End
No games found.
# Games Start End

Top 10 opponents most often played

# Opponent Main Standard Rapid Blitz
Gms Score Dp Gms Score Dp Gms Score Dp Gms Score Dp
Aor Prat Aor Prat Aor Prat Aor Prat
1 Smit ,J (Juanru) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1481.7 1340 1478.2 1340 0 0 0 0
2 Potgieter ,R (Raven) 3 3 425 3 3 425 0 0 0 0 0 0
1159.8 1584.8 1157.8 1584.8 0 0 0 0
3 Janse Van Rensburg ,J (Josh) 3 0 -425 3 0 -425 0 0 0 0 0 0
1522.3 1097.3 1516.9 1097.3 0 0 0 0
4 Boshoff ,M (Milah) 3 2 141.7 3 2 141.7 0 0 0 0 0 0
1353.9 1495.6 1353.2 1495.6 0 0 0 0
5 Marais ,L (Luke) 3 3 425 3 3 425 0 0 0 0 0 0
1287.6 1712.6 1297.4 1712.6 0 0 0 0
6 Vermaak ,A (Alri) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1512.6 1371 1508.7 1371 0 0 0 0
7 Van Zyl ,S (Sanli) 3 1.5 0 3 1.5 0 0 0 0 0 0 0
1608.3 1608.3 1607.9 1608.3 0 0 0 0
8 Rahlaga ,K (Kaelo Alupheli) 3 2 141.7 3 2 141.7 0 0 0 0 0 0
1435.9 1577.6 1442 1577.6 0 0 0 0
9 Dsouza ,E (Ethan) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1400.1 1258.4 1428 1258.4 0 0 0 0
10 Kgwale ,O (Obotegile) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1430.5 1288.8 1434.5 1288.8 0 0 0 0

Norms

No norms achieved.
# Norm Tournament Start End Rounds Games Score Details
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