PLAYER PAGE

Mienje Grobbelaar

2140158377
Tshwane (GTP)
Personal
Main rating
Rating 1631.3
K-factor 28
Floor 1127
Highest 1651.1 (2026-01-01)
Min/Max +/- allowed 87
Rating Change
()
Games 5
Score 3
We 3.09
SWe -0.07
Temp +/- -2
Penalties 0
Weight perform 1608.4
Final +/- -2
New Rating
()
Rating 1629.3
K-factor 28
Floor 1127
Highest 1651.1 (2026-01-01)
Min/Max +/- allowed 87.2
Standard rating
Rating 1631.3
K-factor 28
Floor 1138.6
Highest 1653.8 (2026-01-01)
Min/Max +/- allowed 86.9
Rating Change
()
Games 5
Score 3
We 3.11
SWe -0.11
Temp +/- -3
Penalties 0
Weight perform 1608.4
Final +/- -3
New Rating
()
Rating 1628.4
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 4th Khelo India - LCA Chess Tournament 2026 (D) Standard 2026-07-12 2026-07-12 Johannesburg Metro (GJM) 5 1631.3 5 3 1534.2 -2 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 2026 D4 District Individuals (U12 Girls) Standard 2026-05-30 2026-05-30 Tshwane (GTP) 5 1602.7 5 5 1719.9 17.8 Details
2 2026 Africa Youth Chess Championship Classical 2026-05-15 2026-05-21 Uganda (UGA) 9 1577.2 9 6 1653.4 21.6 Details
3 2026 Milos Ristic Teams Open (Junior) Standard 2026-05-02 2026-05-02 Tshwane (GTP) 5 1577.2 5 3 1597.7 3.9 Details
4 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
5 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
6 2026 AHS Chess Tournament (B) Standard 2026-02-28 2026-02-28 Tshwane (GTP) 5 1546.7 5 1 1254 -40.9 Details
7 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
8 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
9 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
10 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
11 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
12 2025 Centurion Chess Open Tournament (U12) Standard 2025-09-27 2025-09-27 Tshwane (GTP) 5 1603.7 5 4 1583.3 -1 Details
13 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
14 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
15 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
16 South African Open 2025 (U12 Girls) Classical 2025-07-03 2025-07-05 Johannesburg Metro (GJM) 5 1489.3 5 4 1665 20 Details
17 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
18 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
19 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
20 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
21 Lubowski Open 2025 (C) Standard 2025-03-21 2025-03-22 Tshwane (GTP) 5 1483.7 5 1 1194.9 -32.7 Details
22 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
23 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
24 Constantiapark Open 2025 (U12) Standard 2025-02-15 2025-02-15 Tshwane (GTP) 5 1475.9 5 4 1626.4 14.1 Details
25 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
26 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
27 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
28 Lardies Ope 2024 (U12) Standard 2024-10-26 2024-10-26 Tshwane (GTP) 5 1383.4 5 3.5 1441.9 5 Details
29 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
30 2024 Etienne Lewis (U12) Standard 2024-08-30 2024-09-01 Tshwane (GTP) 7 1359.4 7 4 1373.8 3.2 Details
31 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
32 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
33 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
34 Menlopark Open Chess Tournament 2024 (U12) Standard 2024-07-13 2024-07-13 Tshwane (GTP) 5 1369 5 3 1389.2 2.8 Details
35 2024 African Youth Chess Championship Classical 2024-06-16 2024-06-22 Tshwane (GTP) 9 1370.8 9 5 1397.6 4.8 Details
36 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
37 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
38 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
39 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
40 2024 Constantiapark Open (D2) Standard 2024-02-17 2024-02-17 Tshwane (GTP) 5 1363.5 5 2.5 1240.9 -12.6 Details
41 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
42 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
43 Lardies Open Tournament 2023 (D2) Standard 2023-10-28 2023-10-28 Tshwane (GTP) 5 1384.3 5 2 1113.1 -25.6 Details
44 2023 Gauteng Noord (E) Standard 2023-10-14 2023-10-14 Tshwane (GTP) 5 1384.3 5 5 1635.1 28.7 Details
45 2023 Centurion Chess Open (E) Standard 2023-09-23 2023-09-23 Tshwane (GTP) 5 1309.2 5 3 1322.3 0.7 Details
46 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
47 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
48 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
49 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
50 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 5
Wins 3
Draws 0
Losses 2
White 2
Black 3
White wins 1
Black wins 2
Score 3
Percent 60
Dp 85
AOR 1449.2
Performance 1534.2
Game statistics ()
Games 53
Wins 26
Draws 7
Losses 20
White 25
Black 28
White wins 12
Black wins 14
Score 29.5
Percent 55.7
Dp 48.1
AOR 1500.3
Performance 1548.4
Game statistics (History)
Games 277
Wins 165
Draws 19
Losses 93
White 138
Black 139
White wins 82
Black wins 83
Score 174.5
Percent 63
Dp 110.5
AOR 1358.8
Performance 1469.2
Rankings (Main)
National
Overall 878
Gender 64
Age group 48
Gender/Age 10
Provincial
Overall 313
Gender 26
Age group 17
Gender/Age 4
Regional
Overall 116
Gender 6
Age group 4
Gender/Age 1
Rankings (Standard)
National
Overall 810
Gender 62
Age group 48
Gender/Age 9
Provincial
Overall 297
Gender 24
Age group 17
Gender/Age 4
Regional
Overall 113
Gender 6
Age group 4
Gender/Age 1
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 5
Score 3
Percent 60
Aor 1449.2
Dp 85
Prat 1534.2
Performance ()
Games 53
Score 29.5
Percent 55.7
Aor 1500.3
Dp 48.1
Prat 1548.4
Performance (12 months)
Games 86
Score 55.5
Percent 64.5
Aor 1467.1
Dp 123.5
Prat 1590.6
Performance (History)
Games 277
Score 174.5
Percent 63
Aor 1358.8
Dp 110.5
Prat 1469.2
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Boshoff, M (Milah) 6 4 2 2023 Etienne Lewis Closed Tournament (U10) South African Junior Closed Chess Championship 2026 (U12 Girls) Details
Overall 2 Van Zyl, S (Sanli) 4 0 4 2025 Silver Lakes Chess Club Open Chess Tournament (U12) South African Junior Closed Chess Championship 2026 (U12 Girls) Details
Overall 3 Smit, J (Juanru) 4 2 2 2023 Woman's Day Open Chess Tournament (Bishop) 2026 Piet Robbertse Open Chess Tournament (B) Details
Overall 4 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
Overall 5 Haupt, A (Abigail) 3 1 2 Gauteng Inter-Region at UJ 2024 (U12 Girls) 2026 Piet Robbertse Open Chess Tournament (B) Details
Standard 1 Boshoff, M (Milah) 6 4 2 2023 Etienne Lewis Closed Tournament (U10) South African Junior Closed Chess Championship 2026 (U12 Girls) Details
Standard 2 Van Zyl, S (Sanli) 4 0 4 2025 Silver Lakes Chess Club Open Chess Tournament (U12) South African Junior Closed Chess Championship 2026 (U12 Girls) Details
Standard 3 Smit, J (Juanru) 4 2 2 2023 Woman's Day Open Chess Tournament (Bishop) 2026 Piet Robbertse Open Chess Tournament (B) Details
Standard 4 Du Plessis, M (Mia) 3 1 2 2023 Etienne Lewis Closed Tournament (U10) 2026 D4 District Individuals (U12 Girls) Details
Standard 5 Dsouza, E (Ethan) 3 3 0 2023 Centurion Chess Open (E) 2024 Tuks Open Chess Tournament (U12) Details