PLAYER PAGE

Mienje Grobbelaar

2140158377
Tshwane (GTP)
Personal
Main rating
Rating 1490
K-factor 28
Floor 1127
Highest 1651.1 (2026-01-01)
Min/Max +/- allowed 87
Rating Change
()
Games 9
Score 7
We 3.85
SWe 3.15
Temp +/- 88.3
Penalties 0
Weight perform 1473.1
Final +/- +87.2
New Rating
()
Rating 1577.2
K-factor 28
Floor 1127
Highest 1651.1 (2026-01-01)
Min/Max +/- allowed 87.2
Standard rating
Rating 1480.7
K-factor 28
Floor 1138.6
Highest 1653.8 (2026-01-01)
Min/Max +/- allowed 86.9
Rating Change
()
Games 9
Score 7
We 3.72
SWe 3.28
Temp +/- 91.8
Penalties 0
Weight perform 1473.1
Final +/- +86.9
New Rating
()
Rating 1567.5
K-factor 28
Floor 1138.6
Highest 1653.8 (2026-01-01)
Min/Max +/- allowed 86.9
Rapid rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Blitz rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Graph
Tournaments
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 South African Junior Closed Chess Championship 2026 (U12 Girls) Classical 2026-03-28 2026-04-02 Bojanala Platina (NBR) 9 1490 9 7 1784.4 88.3 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 2026 Blou Bull Chess Tournament (B) Standard 2026-02-21 2026-02-21 Tshwane (GTP) 5 1546.7 5 2 1424.1 -15.7 Details
2 2026 AHS Chess Tournament (B) Standard 2026-02-28 2026-02-28 Tshwane (GTP) 5 1546.7 5 1 1254 -40.9 Details
3 2026 Piet Robbertse Open Chess Tournament (B) Standard 2026-02-07 2026-02-08 Tshwane (GTP) 5 1633.4 5 2 1487.2 -15.2 Details
4 2026 Tshwane Chess Registration Tournament (B) Standard 2026-01-31 2026-01-31 Tshwane (GTP) 5 1633.4 5 0.5 1208.4 -42.2 Details
5 2025 Mzansi Individual Championships (U12 Girls) Classical 2025-12-17 2025-12-20 Nelson Mandela Bay (ENM) 6 1571.4 5 3.5 1657.9 9.4 Details
6 2025 Mzansi Inter Provincial Team Championships (U12 Combined) Standard 2025-12-15 2025-12-17 Nelson Mandela Bay (ENM) 6 1571.4 6 5 1721.9 17.8 Details
7 Gauteng Inter-Region at Emerald Resort 2025 (U12 Girls) Standard 2025-12-06 2025-12-07 Sedibeng (GSV) 5 1571.4 5 4 1631 7.5 Details
8 2025 Centurion Chess Open Tournament (U12) Standard 2025-09-27 2025-09-27 Tshwane (GTP) 5 1603.7 5 4 1583.3 -1 Details
9 2025 Tshwane South School District CLOSED League Championship (U11A) Standard 2025-08-15 2025-08-15 Tshwane (GTP) 5 1512 5 5 1832.6 32 Details
10 2025 Etienne Lewis Closed Chess Tournament (U12) Standard 2025-08-08 2025-08-10 Tshwane (GTP) 7 1512 7 4.5 1553.2 5.6 Details
11 2025 Wynie Robbertse Chess Tournament (U12) Standard 2025-07-19 2025-07-19 Tshwane (GTP) 5 1489.3 5 3 1421.5 -5.8 Details
12 South African Open 2025 (U12 Girls) Classical 2025-07-03 2025-07-05 Johannesburg Metro (GJM) 5 1489.3 5 4 1665 20 Details
13 Third Knight Riders Junior Open 2025 (B+C) Standard 2025-06-22 2025-06-22 Johannesburg Metro (GJM) 5 1478.2 5 3 1349.4 -13.1 Details
14 2025 Elise Steenkamp Open Chess Tournament (Bishop) Standard 2025-06-14 2025-06-15 Tshwane (GTP) 5 1478.2 5 4 1635.3 18.2 Details
15 2025 Tshwane South School District Individual Finals (D4) (U11 Girls) Standard 2025-05-10 2025-05-10 Tshwane (GTP) 5 1413.9 5 4 1628.3 21.7 Details
16 2025 Silver Lakes Chess Club Open Chess Tournament (U12) Standard 2025-05-03 2025-05-03 Tshwane (GTP) 5 1413.9 5 3.5 1610.7 18.4 Details
17 Lubowski Open 2025 (C) Standard 2025-03-21 2025-03-22 Tshwane (GTP) 5 1483.7 5 1 1194.9 -32.7 Details
18 2025 Chris Greyling Open Chess Tournament (U12) Standard 2025-03-15 2025-03-15 Tshwane (GTP) 5 1483.7 5 2.5 1376.1 -9.6 Details
19 AHS Open Chess Tournament 2025 (U12) Standard 2025-03-01 2025-03-01 Tshwane (GTP) 5 1483.7 5 3 1476.6 -1.3 Details
20 Constantiapark Open 2025 (U12) Standard 2025-02-15 2025-02-15 Tshwane (GTP) 5 1475.9 5 4 1626.4 14.1 Details
21 2025 Blou Bul Open Chess Tournament (C) Standard 2025-02-08 2025-02-08 Tshwane (GTP) 5 1475.9 5 2 1295.3 -16.8 Details
22 2025 Tshwane Chess OPEN Registration Tournament (U12) Standard 2025-01-25 2025-01-25 Tshwane (GTP) 5 1416.1 5 4 1591.9 16.6 Details
23 Gauteng Inter-Region at UJ 2024 (U12 Girls) Standard 2024-12-07 2024-12-08 Johannesburg Metro (GJM) 5 1392.4 5 3.5 1503.3 13.1 Details
24 Lardies Ope 2024 (U12) Standard 2024-10-26 2024-10-26 Tshwane (GTP) 5 1383.4 5 3.5 1441.9 5 Details
25 2024 Tuks Open Chess Tournament (U12) Standard 2024-09-28 2024-09-28 Tshwane (GTP) 5 1359.4 5 3 1471.4 10.1 Details
26 2024 Etienne Lewis (U12) Standard 2024-08-30 2024-09-01 Tshwane (GTP) 7 1359.4 7 4 1373.8 3.2 Details
27 2024 Jacaranda Round Robin Open Chess Tournament (E) Standard 2024-08-17 2024-08-17 Tshwane (GTP) 5 1385.1 5 1 1114.8 -27.1 Details
28 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U11A) Standard 2024-08-03 2024-08-03 Tshwane (GTP) 5 1385.1 5 3.5 1509.7 12.8 Details
29 Eureka Open 27 July 2024 (G) Standard 2024-07-27 2024-07-27 Sedibeng (GSV) 5 1369 5 3.5 1432.2 5.6 Details
30 Menlopark Open Chess Tournament 2024 (U12) Standard 2024-07-13 2024-07-13 Tshwane (GTP) 5 1369 5 3 1389.2 2.8 Details
31 2024 African Youth Chess Championship Classical 2024-06-16 2024-06-22 Tshwane (GTP) 9 1370.8 9 5 1397.6 4.8 Details
32 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (D) Standard 2024-06-01 2024-06-01 Tshwane (GTP) 5 1370.8 5 3 1303.4 -5.8 Details
33 2024 Tshwane South School District CLOSED Individual Championships (U11 Girls) Standard 2024-05-11 2024-05-11 Tshwane (GTP) 5 1322.2 5 3.5 1459.7 12.8 Details
34 South African Junior Closed Chess Championship 2024 (U10 Girls) Classical 2024-04-27 2024-05-01 Ekurhuleni (GE) 9 1322.2 9 5 1385.7 14.2 Details
35 2024 Lubowski Open Chess Tournament (D2) Standard 2024-03-23 2024-03-24 Tshwane (GTP) 5 1340.8 5 3 1251.7 -10.3 Details
36 2024 Constantiapark Open (D2) Standard 2024-02-17 2024-02-17 Tshwane (GTP) 5 1363.5 5 2.5 1240.9 -12.6 Details
37 2024 Tshwane Chess OPEN Registration Tournament (D1) Standard 2024-01-27 2024-01-27 Tshwane (GTP) 5 1390.4 5 2 1108.9 -26.4 Details
38 2024 Gauteng Inter-Region Chess Championship (U10B) Standard 2024-01-13 2024-01-14 Tshwane (GTP) 5 1390.4 5 4 1484.9 11.4 Details
39 Lardies Open Tournament 2023 (D2) Standard 2023-10-28 2023-10-28 Tshwane (GTP) 5 1384.3 5 2 1113.1 -25.6 Details
40 2023 Gauteng Noord (E) Standard 2023-10-14 2023-10-14 Tshwane (GTP) 5 1384.3 5 5 1635.1 28.7 Details
41 2023 Centurion Chess Open (E) Standard 2023-09-23 2023-09-23 Tshwane (GTP) 5 1309.2 5 3 1322.3 0.7 Details
42 2023 Alekhine Open Tournament (E+F) Standard 2023-09-09 2023-09-09 Tshwane (GTP) 5 1309.2 5 4 1585.5 31.3 Details
43 2023 Woman's Day Open Chess Tournament (Bishop) Standard 2023-08-09 2023-08-09 Tshwane (GTP) 5 1275.3 5 4 1507.6 22.1 Details
44 2023 Etienne Lewis Closed Tournament (U10) Standard 2023-08-25 2023-08-27 Tshwane (GTP) 7 1275.3 7 3 1248.6 -3.4 Details
45 2023 Tshwane South School District CLOSED League Championship (U9) Standard 2023-07-29 2023-07-29 Tshwane (GTP) 5 1200 4 2 1242.2 1.8 Details
46 2023 Menlo Open Tournament (E) Standard 2023-07-22 2023-07-22 Tshwane (GTP) 5 1200 5 5 1614.8 39.8 Details
Game statistics ( )
Games 0
Wins 0
Draws 0
Losses 0
White 0
Black 0
White wins 0
Black wins 0
Score 0
Percent 0
Dp 0
AOR 0
Performance 0
Game statistics ()
Games 29
Wins 11
Draws 3
Losses 15
White 14
Black 15
White wins 4
Black wins 7
Score 12.5
Percent 43.1
Dp -58.6
AOR 1538.9
Performance 1480.3
Game statistics (History)
Games 253
Wins 150
Draws 15
Losses 88
White 127
Black 126
White wins 74
Black wins 76
Score 157.5
Percent 62.3
Dp 104.2
AOR 1349.8
Performance 1453.9
Rankings (Main)
National
Overall 1991
Gender 250
Age group 191
Gender/Age 47
Provincial
Overall 681
Gender 93
Age group 63
Gender/Age 15
Regional
Overall 246
Gender 37
Age group 22
Gender/Age 8
Rankings (Standard)
National
Overall 1976
Gender 272
Age group 201
Gender/Age 53
Provincial
Overall 695
Gender 98
Age group 68
Gender/Age 18
Regional
Overall 255
Gender 38
Age group 22
Gender/Age 8
Rankings (Rapid)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Rankings (Blitz)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Performance ( )
Games 9
Score 7
Percent 77.8
Aor 1548.3
Dp 236.1
Prat 1784.4
Performance ()
Games 29
Score 12.5
Percent 43.1
Aor 1538.9
Dp -58.6
Prat 1480.3
Performance (12 months)
Games 92
Score 60
Percent 65.2
Aor 1438.1
Dp 129.3
Prat 1567.5
Performance (History)
Games 253
Score 157.5
Percent 62.3
Aor 1349.8
Dp 104.2
Prat 1453.9
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Boshoff, M (Milah) 5 4 1 2023 Etienne Lewis Closed Tournament (U10) 2026 AHS Chess Tournament (B) Details
Overall 2 Smit, J (Juanru) 4 2 2 2023 Woman's Day Open Chess Tournament (Bishop) 2026 Piet Robbertse Open Chess Tournament (B) Details
Overall 3 Vermaak, A (Alri) 3 3 0 South African Junior Closed Chess Championship 2024 (U10 Girls) 2025 Tshwane South School District Individual Finals (D4) (U11 Girls) Details
Overall 4 Dsouza, E (Ethan) 3 3 0 2023 Centurion Chess Open (E) 2024 Tuks Open Chess Tournament (U12) Details
Overall 5 Van Der Schyff, M (Mila-Ne) 3 2 1 South African Junior Closed Chess Championship 2024 (U10 Girls) Gauteng Inter-Region at Emerald Resort 2025 (U12 Girls) Details
Standard 1 Boshoff, M (Milah) 5 4 1 2023 Etienne Lewis Closed Tournament (U10) 2026 AHS Chess Tournament (B) Details
Standard 2 Smit, J (Juanru) 4 2 2 2023 Woman's Day Open Chess Tournament (Bishop) 2026 Piet Robbertse Open Chess Tournament (B) Details
Standard 3 Whittaker, L (Lillian) 3 1 2 2023 Menlo Open Tournament (E) 2025 Mzansi Inter Provincial Team Championships (U12 Combined) Details
Standard 4 Vermaak, A (Alri) 3 3 0 South African Junior Closed Chess Championship 2024 (U10 Girls) 2025 Tshwane South School District Individual Finals (D4) (U11 Girls) Details
Standard 5 Van Zyl, S (Sanli) 3 0 3 2025 Silver Lakes Chess Club Open Chess Tournament (U12) 2025 Tshwane South School District CLOSED League Championship (U11A) Details