PLAYER PAGE

Johannes Theodorus Wessel Grobler

107088585
Tshwane (GTP)
Personal
Main rating
Rating 1714.9
K-factor 28
Floor 1214.9
Highest 1745.8 (2026-01-01)
Min/Max +/- allowed 76
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1726.3
Final +/- 0
New Rating
()
Rating 1714.9
K-factor 28
Floor 1214.9
Highest 1745.8 (2026-01-01)
Min/Max +/- allowed 76.2
Standard rating
Rating 1722
K-factor 28
Floor 1222
Highest 1743.8 (2026-01-01)
Min/Max +/- allowed 76.4
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1726.3
Final +/- 0
New Rating
()
Rating 1722
K-factor 28
Floor 1222
Highest 1743.8 (2026-01-01)
Min/Max +/- allowed 76.4
Rapid rating
Rating 1200
K-factor 36
Floor 700
Highest 1202 (2022-09-01)
Min/Max +/- allowed 165.3
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 1202 (2022-09-01)
Min/Max +/- allowed 165.3
Blitz rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2024-02-01)
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 (2024-02-01)
Min/Max +/- allowed 165.8
Rating Graph
Tournaments
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 2026 AHS Chess Tournament (A) Standard 2026-02-28 2026-02-28 Tshwane (GTP) 5 1714.8 5 2 1626.8 -13 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Gauteng Inter-Region at Emerald Resort 2025 (U20) Standard 2025-12-06 2025-12-07 Sedibeng (GSV) 5 1681.1 5 5 1904.5 0 Details
2 2025 Gauteng Top Schools Teams (U19) Standard 2025-08-30 2025-08-30 Tshwane (GTP) 5 1658.4 5 5 1801 0 Details
3 2025 Tshwane South School District CLOSED League Championship (U19A) Standard 2025-08-16 2025-08-16 Tshwane (GTP) 5 1645.1 5 4.5 1746.8 0 Details
4 2025 Menlo Open (A) Standard 2025-07-26 2025-07-26 Tshwane (GTP) 5 1633.5 4 2 1767.5 0 Details
5 2025 Wynie Robbertse Chess Tournament (B) Standard 2025-07-19 2025-07-19 Tshwane (GTP) 5 1633.5 5 3 1603.6 0 Details
6 AHS Open Chess Tournament 2025 (B) Standard 2025-03-01 2025-03-01 Tshwane (GTP) 5 1631 5 3 1641.6 0 Details
7 Grey College Team Championship 2025 (Prestige) Standard 2025-02-21 2025-02-22 Mangaung (FMB) 5 1629.9 5 3 1588.1 0 Details
8 2025 Piet Robbertse Fide Rated Open Chess Tournament (B) Standard 2025-02-01 2025-02-02 Tshwane (GTP) 5 1629.9 5 3 1686.3 0 Details
9 Gauteng Inter-Region at UJ 2024 (U18 Open) Standard 2024-12-07 2024-12-08 Johannesburg Metro (GJM) 5 1594.9 5 5 1810.2 0 Details
10 2024 Tshwane Chess Club Clash (Open) Standard 2024-10-12 2024-10-12 Tshwane (GTP) 5 1611.1 5 2.5 1503 0 Details
11 Gauteng Top Schools 2024 (U19 Open) Rapid 2024-10-05 2024-10-05 Ekurhuleni (GE) 5 1611.1 5 4 1596 0 Details
12 2024 Tuks Open Chess Tournament (A) Standard 2024-09-28 2024-09-28 Tshwane (GTP) 5 1625.1 4 1.5 1569.7 0 Details
13 Centurion Chess Open Tournament 2024 (A) Standard 2024-09-21 2024-09-21 Tshwane (GTP) 5 1625.1 5 2 1599.8 0 Details
14 2024 Etienne Lewis (U18+U20) Standard 2024-08-30 2024-09-01 Tshwane (GTP) 7 1625.1 7 4.5 1653.7 0 Details
15 Gauteng Schools Individuals Finals 2024 (U18 Boys) Standard 2024-08-17 2024-08-17 Ekurhuleni (GE) 5 1625.1 5 4 1547.8 0 Details
16 2024 Alekhine Open Chess Tournament (A) Standard 2024-08-09 2024-08-10 Tshwane (GTP) 5 1512.5 5 3 1684.1 0 Details
17 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U19A) Standard 2024-08-03 2024-08-03 Tshwane (GTP) 5 1512.5 5 5 1814.8 0 Details
18 2024 Tshwane South School District CLOSED Individual Championships (U18 Mixed) Standard 2024-05-11 2024-05-11 Tshwane (GTP) 5 1498.2 5 4 1588.6 0 Details
19 2024 KSNG CHess Academy Open Tournament (C) Standard 2024-04-06 2024-04-06 Tshwane (GTP) 5 1481.2 5 3.5 1580.9 0 Details
20 2024 Tshwane Chess AHS Open Chess Tournament (B) Standard 2024-02-24 2024-02-24 Tshwane (GTP) 5 1494.2 5 1.5 1336.1 0 Details
21 2024 Piet Robbertse Open Chess Tournament (B) Standard 2024-02-03 2024-02-04 Tshwane (GTP) 5 1494.2 5 3 1528.4 0 Details
22 2024 Blou Bul Open Chess Tournament (B) Standard 2024-02-10 2024-02-10 Tshwane (GTP) 5 1494.2 5 3 1552.4 0 Details
23 2024 Gauteng Inter-Region Chess Championship (U18A) Standard 2024-01-13 2024-01-14 Tshwane (GTP) 5 1443.5 5 4.5 1669.1 0 Details
24 2023 Moja Chess Extravaganza (B) Classical 2023-09-30 2023-10-04 Frances Baard (NCF) 9 1516.8 8 2.5 1273.6 0 Details
25 2023 Alekhine Open Tournament (B) Standard 2023-09-09 2023-09-10 Tshwane (GTP) 5 1426.3 4 3.5 1717.4 0 Details
26 2023 Gauteng Top Schools (U19 Mixed) Standard 2023-08-19 2023-08-19 West Rand (GWR) 5 1365.2 5 3 1282.5 0 Details
27 2023 Etienne Lewis Closed Tournament (U18+U20) Standard 2023-08-25 2023-08-27 Tshwane (GTP) 7 1365.2 7 5.5 1652.8 0 Details
28 2023 Tshwane South School District CLOSED League Championship (U19) Standard 2023-07-29 2023-07-29 Tshwane (GTP) 5 1370.2 5 3 1254.9 0 Details
29 2023 Mid Gauteng Open Tournament (B) Standard 2023-05-06 2023-05-06 Tshwane (GTP) 5 1342.8 5 3 1527.1 0 Details
30 Silver Lakes Open Chess Tournament (B) Standard 2023-04-15 2023-04-15 Tshwane (GTP) 5 1382.4 5 1.5 1243.5 0 Details
31 2023 Tshwane South School District CLOSED Individual Championships (U18 Open) Standard 2023-04-22 2023-04-22 Tshwane (GTP) 5 1382.4 5 2 1272.4 0 Details
32 Chris Greyling Open Tournament 2023 (B) Standard 2023-03-21 2023-03-21 Tshwane (GTP) 5 1378.4 5 1.5 1226.3 0 Details
33 2023 Afrikaans Hoër Seunskool Open Chess Tournament (B) Standard 2023-03-04 2023-03-04 Tshwane (GTP) 5 1378.4 5 3 1544.6 0 Details
34 Grey College Team Championship 2023 (A) Standard 2023-02-03 2023-02-04 Mangaung (FMB) 5 1391.7 5 3 1295.4 0 Details
35 2023 Tshwane Chess Open Registration Tournament (B1) Standard 2023-01-28 2023-01-28 Tshwane (GTP) 5 1403.4 5 2 1321 0 Details
36 2022 South African Junior Team Chess Championships (U16 Open) Classical 2022-12-04 2022-12-08 4 Knights (4K) 7 1393 7 4.5 1422.6 0 Details
37 2022 Wynie Robbertse Open (C) Standard 2022-10-08 2022-10-08 Tshwane (GTP) 5 1366.4 5 4 1511.4 0 Details
38 Afrikaanse Hoër Seunskool Interne Skaak KampioenskAP 2022 Rapid 2022-09-22 2022-09-22 Tshwane (GTP) 7 1305.3 7 5.5 1534.8 0 Details
39 2022 Etienne Lewis (U16 Open) Standard 2022-09-02 2022-09-04 Tshwane (GTP) 7 1305.3 7 4 1382.6 0 Details
40 2022 Gauteng Schools Team Championships (U15 Open) Standard 2022-08-26 2022-08-26 Tshwane (GTP) 5 1316.4 5 2.5 1260 0 Details
41 2022 Gauteng Schools Individual Chess Championship (U15 Boys) Standard 2022-06-18 2022-06-18 Ekurhuleni (GE) 5 1303 5 3 1371 0 Details
42 2022 Silver Lakes Chess Club Open Chess Tournament (C) Standard 2022-05-14 2022-05-14 Tshwane (GTP) 5 1325.4 5 2.5 1202.5 0 Details
43 D4 Individuals 2022 (U15 Open) Rapid 2022-04-23 2022-04-23 Tshwane (GTP) 7 1330.7 7 4 1309.6 0 Details
44 2022 Lubowski Open Tournament (C) Standard 2022-04-09 2022-04-10 Tshwane (GTP) 5 1330.7 5 3 1319 0 Details
45 2022 Chris Greyling Open (C) Standard 2022-03-12 2022-03-12 Tshwane (GTP) 5 1295 5 3.5 1401.7 0 Details
46 2022 Gauteng Interregion (U16 Open) Standard 2022-02-26 2022-02-26 Tshwane (GTP) 5 1253.9 5 3.5 1537.3 0 Details
47 Piet Robertse 2022 (C) Standard 2022-02-05 2022-02-05 Tshwane (GTP) 5 1253.9 5 2.5 1145.6 0 Details
48 Grey College Team Championship 2022 (A) Standard 2022-02-18 2022-02-19 Mangaung (FMB) 5 1253.9 5 3 1241.7 0 Details
49 2021 Affies Interhuis Rapid 2021-10-28 2021-10-28 Tshwane (GTP) 5 1259.7 5 3 1175.2 0 Details
50 2021 Etienne Lewis Closed Trials (U16 Open) Standard 2021-09-24 2021-09-26 Nelson Mandela Bay (ENM) 7 1141.7 7 3.5 1438.8 0 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 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 (History)
Games 293
Wins 160
Draws 47
Losses 86
White 149
Black 144
White wins 86
Black wins 74
Score 183.5
Percent 62.6
Dp 107.3
AOR 1354
Performance 1461.3
Rankings (Main)
National
Overall 433
Gender 410
Age group 42
Gender/Age 38
Provincial
Overall 165
Gender 156
Age group 12
Gender/Age 10
Regional
Overall 68
Gender 65
Age group 6
Gender/Age 5
Rankings (Standard)
National
Overall 403
Gender 380
Age group 41
Gender/Age 37
Provincial
Overall 157
Gender 149
Age group 12
Gender/Age 10
Regional
Overall 67
Gender 64
Age group 6
Gender/Age 5
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 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance ()
Games 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance (12 months)
Games 24
Score 19.5
Percent 81.2
Aor 1498.9
Dp 265.6
Prat 1764.6
Performance (History)
Games 293
Score 183.5
Percent 62.6
Aor 1354
Dp 107.3
Prat 1461.3
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Du Toit, SJM (Stephanus (Matteo) Johannes Matheus) 5 3 2 D4 Individuals 2022 (U15 Open) Gauteng Top Schools 2024 (U19 Open) Details
Overall 2 Ferreira, H (Hechter) 4 2 2 2021 Affies Interhuis 2024 Alekhine Open Chess Tournament (A) Details
Overall 3 Venter, Z (Zanri) 3 1 2 2021 Alekhine Open (C) 2023 Etienne Lewis Closed Tournament (U18+U20) Details
Overall 4 Ngobeni, N (Njabulo) 3 2 1 2023 Tshwane South School District CLOSED Individual Championships (U18 Open) 2024 Etienne Lewis (U18+U20) Details
Overall 5 Fidos, E (Eric) 3 2 1 2022 Etienne Lewis (U16 Open) 2025 Tshwane South School District CLOSED League Championship (U19A) Details
Standard 1 Venter, Z (Zanri) 3 1 2 2021 Alekhine Open (C) 2023 Etienne Lewis Closed Tournament (U18+U20) Details
Standard 2 Ngobeni, N (Njabulo) 3 2 1 2023 Tshwane South School District CLOSED Individual Championships (U18 Open) 2024 Etienne Lewis (U18+U20) Details
Standard 3 Du Toit, SJM (Stephanus (Matteo) Johannes Matheus) 3 2 1 2022 Etienne Lewis (U16 Open) D4 Tshwane South District Schools Teams Chess Tournament 2024 (U19A) Details
Standard 4 Gounder, A (Arun) 3 1 2 2022 Silver Lakes Chess Club Open Chess Tournament (C) 2024 Piet Robbertse Open Chess Tournament (B) Details
Standard 5 Rust, C (Christoph) 3 3 0 2024 Blou Bul Open Chess Tournament (B) 2025 Wynie Robbertse Chess Tournament (B) Details
Rapid 1 Ferreira, H (Hechter) 2 0 2 2021 Affies Interhuis D4 Individuals 2022 (U15 Open) Details
Rapid 2 Du Toit, SJM (Stephanus (Matteo) Johannes Matheus) 2 1 1 D4 Individuals 2022 (U15 Open) Gauteng Top Schools 2024 (U19 Open) Details