PLAYER PAGE

Personal

Grobler, JTW (Johannes Theodorus Wessel)

Chess SA id

107088585

FIDE id

?

Date of birth

2007-06-25 (U20)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

No

Last active game

2025-08-30

Personal details last changed

1900-01-01

Junior GPX Games

46.9

Junior GPX Points

1581.6

Item Main Standard Rapid Blitz
Rating 1688.9 1687 1200 1200
Raw rating 1680.9 1687 1200 1200
Weighted rating 1616.8 1616.6 1107.2 882.7
Weighted performance 1688.9 1686.8 0 0
Floor 1180.9 1187 700 700
K-factor 28 28 36 36
Min/Max rating change allowed 83.6 82.9 165.8 165.8
Highest rating 1688.9
2025-11-01
1687
2025-11-01
1202
2022-09-01
1200
2024-02-01
Highest raw rating 1680.9
2025-11-01
1687
2025-11-01
1200
2025-04-01
1200
2025-04-01
Highest weighted rating 1616.8
2025-11-01
1616.6
2025-11-01
1200
2024-11-01
756.7
2025-08-01
Highest weighted performance 1688.9
2025-11-01
1686.8
2025-11-01
1202
2022-09-01
1200
2024-02-01

Prediction
Item Main Standard Rapid Blitz
Rating change -8 0 0 0
New rating 1680.9 1687 1200 1200
Analysis
Rating 1688.9 1687 1200 1200
Raw rating 1680.9 1687 1200 1200
Weighted rating 1616.8 1616.6 1107.2
Weighted performance 1688.9 1686.8 0
K-factor 28 28 36 36
Floor 1180.9 1187 700 700
Max/Min rating change allowed 83.6 82.9 165.8 165.8
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 1680.9 1687 1200 1200
New weighted rating 1625 1625.4 1119.4 920
New weighted performance 1678.8 1676.7 0 0
Temp new rating 1680.9 1687 1200 1200
Temp new rating +/- -8 0 0 0
Final new rating +/- -8 0 0 0
New rating 1680.9 1687 1200 1200
New K-factor 28 28 36 36
New floor 1180.9 1187 700 700

Item Main Standard Rapid Blitz
0 0 0 0
34 34 0 0
76 71 5 0
64 64 0 0
73 59 14 0
21 16 5 0
History 312 288 24 0

Games since
Main
110
Standard
105
Rapid
5
Blitz
0
Gender Male
Age group U20
Region Tshwane (GTP)
Province Gauteng (GT)
Main
RSA Province Region
Overall 339 130 52
Male 320 122 50
U20 31 10 3
U20 Male 27 7 2
Standard
RSA Province Region
Overall 339 134 53
Male 316 124 51
U20 37 13 4
U20 Male 31 10 3
Rapid
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U20 -1 -1 -1
U20 Male -1 -1 -1
Blitz
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U20 -1 -1 -1
U20 Male -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 34 23.5 69.12 162.5 1525.9 1688.4
Standard 34 23.5 69.12 162.5 1525.9 1688.4
Rapid 0 0 0 0 0 0
Blitz 0 0 0 0 0 0
History
Games Score % Dp AvgOpp Performance
Main 288 178.5 61.98 101.8 1351.8 1453.6
Standard 264 162 61.36 96.6 1361.3 1457.8
Rapid 24 16.5 68.75 159.4 1247.6 1407
Blitz 0 0 0 0 0 0

Date Main Standard Rapid Blitz
2025-11-01 1680.9 1687 1200 1200
2025-09-30 1658.4 1663.4 1200 1200
2025-09-01 1658.4 1663.4 1200 1200
2025-08-01 1645.1 1645.9 1200 1200
2025-07-01 1633.5 1629.7 1200 1200
2025-06-01 1633.5 1629.7 1200 1200
2025-05-01 1633.5 1629.7 1200 1200
2025-04-01 1633.5 1629.7 1200 1200
2025-03-01 1631 1627 1055.6 500
2025-02-01 1629.9 1628.1 1055.6 500
2025-01-01 1629.9 1628.1 1055.6 500
2024-12-01 1594.9 1590.3 1055.6 500
2024-11-01 1594.9 1590.3 1055.6 500
2024-10-01 1611.1 1609.6 931.2 500
2024-09-01 1625.1 1629.2 931.2 500
2024-08-01 1512.5 1517.3 931.2 500
2024-07-01 1512.5 1517.3 931.2 500
2024-09-01 1512.5 1517.3 931.2 500
2024-05-01 1498.2 1499.1 931.2 500
2024-04-01 1481.2 1475.4 931.2 500
2024-03-01 1481.2 1475.4 931.2 500
2024-02-01 1494.2 1486.9 931.2 500
2024-01-01 1443.5 1437.5 931.2 500
2023-12-01 1443.5 1437.5 931.2 500

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 Gauteng Top Schools Teams (U19) 2025-08-30 2025-08-30 Standard Tshwane (GTP) 5 5 5 Yes Analysis
2 2025 Tshwane South School District CLOSED League Championship (U19A) 2025-08-16 2025-08-16 Standard Tshwane (GTP) 5 5 4.5 Yes Analysis
3 2025 Menlo Open (A) 2025-07-26 2025-07-26 Standard Tshwane (GTP) 5 4 2 Yes Analysis
4 2025 Wynie Robbertse Chess Tournament (B) 2025-07-19 2025-07-19 Standard Tshwane (GTP) 5 5 3 Yes Analysis
5 AHS Open Chess Tournament 2025 (B) 2025-03-01 2025-03-01 Standard Tshwane (GTP) 5 5 3 Yes Analysis
6 Grey College Team Championship 2025 (Prestige) 2025-02-21 2025-02-22 Standard Mangaung (FMB) 5 5 3 Yes Analysis
7 2025 Piet Robbertse Fide Rated Open Chess Tournament (B) 2025-02-01 2025-02-02 Standard Tshwane (GTP) 5 5 3 Yes Analysis
Last 500 tournaments since 01 January 2018
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 2025 Gauteng Top Schools Teams (U19) 2025-08-30 2025-08-30 Standard Tshwane (GTP) 5 5 5 Yes Analysis
2 2025 Tshwane South School District CLOSED League Championship (U19A) 2025-08-16 2025-08-16 Standard Tshwane (GTP) 5 5 4.5 Yes Analysis
3 2025 Menlo Open (A) 2025-07-26 2025-07-26 Standard Tshwane (GTP) 5 4 2 Yes Analysis
4 2025 Wynie Robbertse Chess Tournament (B) 2025-07-19 2025-07-19 Standard Tshwane (GTP) 5 5 3 Yes Analysis
5 AHS Open Chess Tournament 2025 (B) 2025-03-01 2025-03-01 Standard Tshwane (GTP) 5 5 3 Yes Analysis
6 Grey College Team Championship 2025 (Prestige) 2025-02-21 2025-02-22 Standard Mangaung (FMB) 5 5 3 Yes Analysis
7 2025 Piet Robbertse Fide Rated Open Chess Tournament (B) 2025-02-01 2025-02-02 Standard Tshwane (GTP) 5 5 3 Yes Analysis
8 Gauteng Inter-Region at UJ 2024 (U18 Open) 2024-12-07 2024-12-08 Standard Johannesburg Metro (GJM) 5 5 5 Yes Analysis
9 2024 Tshwane Chess Club Clash (Open) 2024-10-12 2024-10-12 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
10 Gauteng Top Schools 2024 (U19 Open) 2024-10-05 2024-10-05 Rapid Ekurhuleni (GE) 5 5 4 Yes Analysis
11 2024 Tuks Open Chess Tournament (A) 2024-09-28 2024-09-28 Standard Tshwane (GTP) 5 4 1.5 Yes Analysis
12 Centurion Chess Open Tournament 2024 (A) 2024-09-21 2024-09-21 Standard Tshwane (GTP) 5 5 2 Yes Analysis
13 2024 Etienne Lewis (U18+U20) 2024-08-30 2024-09-01 Standard Tshwane (GTP) 7 7 4.5 Yes Analysis
14 Gauteng Schools Individuals Finals 2024 (U18 Boys) 2024-08-17 2024-08-17 Standard Ekurhuleni (GE) 5 5 4 Yes Analysis
15 2024 Alekhine Open Chess Tournament (A) 2024-08-09 2024-08-10 Standard Tshwane (GTP) 5 5 3 Yes Analysis
16 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U19A) 2024-08-03 2024-08-03 Standard Tshwane (GTP) 5 5 5 Yes Analysis
17 2024 Tshwane South School District CLOSED Individual Championships (U18 Mixed) 2024-05-11 2024-05-11 Standard Tshwane (GTP) 5 5 4 Yes Analysis
18 2024 KSNG CHess Academy Open Tournament (C) 2024-04-06 2024-04-06 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
19 2024 Tshwane Chess AHS Open Chess Tournament (B) 2024-02-24 2024-02-24 Standard Tshwane (GTP) 5 5 1.5 Yes Analysis
20 2024 Piet Robbertse Open Chess Tournament (B) 2024-02-03 2024-02-04 Standard Tshwane (GTP) 5 5 3 Yes Analysis
21 2024 Blou Bul Open Chess Tournament (B) 2024-02-10 2024-02-10 Standard Tshwane (GTP) 5 5 3 Yes Analysis
22 2024 Gauteng Inter-Region Chess Championship (U18A) 2024-01-13 2024-01-14 Standard Tshwane (GTP) 5 5 4.5 Yes Analysis
23 2023 Moja Chess Extravaganza (B) 2023-09-30 2023-10-04 Standard Frances Baard (NCF) 9 8 2.5 Yes Analysis
24 2023 Alekhine Open Tournament (B) 2023-09-09 2023-09-10 Standard Tshwane (GTP) 5 4 3.5 Yes Analysis
25 2023 Gauteng Top Schools (U19 Mixed) 2023-08-19 2023-08-19 Standard West Rand (GWR) 5 5 3 Yes Analysis
26 2023 Etienne Lewis Closed Tournament (U18+U20) 2023-08-25 2023-08-27 Standard Tshwane (GTP) 7 7 5.5 Yes Analysis
27 2023 Tshwane South School District CLOSED League Championship (U19) 2023-07-29 2023-07-29 Standard Tshwane (GTP) 5 5 3 Yes Analysis
28 2023 Mid Gauteng Open Tournament (B) 2023-05-06 2023-05-06 Standard Tshwane (GTP) 5 5 3 Yes Analysis
29 Silver Lakes Open Chess Tournament (B) 2023-04-15 2023-04-15 Standard Tshwane (GTP) 5 5 1.5 Yes Analysis
30 2023 Tshwane South School District CLOSED Individual Championships (U18 Open) 2023-04-22 2023-04-22 Standard Tshwane (GTP) 5 5 2 Yes Analysis
31 Chris Greyling Open Tournament 2023 (B) 2023-03-21 2023-03-21 Standard Tshwane (GTP) 5 5 1.5 Yes Analysis
32 2023 Afrikaans Hoër Seunskool Open Chess Tournament (B) 2023-03-04 2023-03-04 Standard Tshwane (GTP) 5 5 3 Yes Analysis
33 Grey College Team Championship 2023 (A) 2023-02-03 2023-02-04 Standard Mangaung (FMB) 5 5 3 Yes Analysis
34 2023 Tshwane Chess Open Registration Tournament (B1) 2023-01-28 2023-01-28 Standard Tshwane (GTP) 5 5 2 Yes Analysis
35 2022 South African Junior Team Chess Championships (U16 Open) 2022-12-04 2022-12-08 Standard 4 Knights (4K) 7 7 4.5 Yes Analysis
36 2022 Wynie Robbertse Open (C) 2022-10-08 2022-10-08 Standard Tshwane (GTP) 5 5 4 Yes Analysis
37 Afrikaanse Hoër Seunskool Interne Skaak KampioenskAP 2022 2022-09-22 2022-09-22 Rapid Tshwane (GTP) 7 7 5.5 Yes Analysis
38 2022 Etienne Lewis (U16 Open) 2022-09-02 2022-09-04 Standard Tshwane (GTP) 7 7 4 Yes Analysis
39 2022 Gauteng Schools Team Championships (U15 Open) 2022-08-26 2022-08-26 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
40 2022 Gauteng Schools Individual Chess Championship (U15 Boys) 2022-06-18 2022-06-18 Standard Ekurhuleni (GE) 5 5 3 Yes Analysis
41 2022 Silver Lakes Chess Club Open Chess Tournament (C) 2022-05-14 2022-05-14 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
42 D4 Individuals 2022 (U15 Open) 2022-04-23 2022-04-23 Rapid Tshwane (GTP) 7 7 4 Yes Analysis
43 2022 Lubowski Open Tournament (C) 2022-04-09 2022-04-10 Standard Tshwane (GTP) 5 5 3 Yes Analysis
44 2022 Chris Greyling Open (C) 2022-03-12 2022-03-12 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
45 2022 Gauteng Interregion (U16 Open) 2022-02-26 2022-02-26 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
46 Piet Robertse 2022 (C) 2022-02-05 2022-02-05 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
47 Grey College Team Championship 2022 (A) 2022-02-18 2022-02-19 Standard Mangaung (FMB) 5 5 3 Yes Analysis
48 2021 Affies Interhuis 2021-10-28 2021-10-28 Rapid Tshwane (GTP) 5 5 3 Yes Analysis
49 2021 Etienne Lewis Closed Trials (U16 Open) 2021-09-24 2021-09-26 Standard Nelson Mandela Bay (ENM) 7 7 3.5 Yes Analysis
50 2021 Gauteng North Open Tournament (C) 2021-08-28 2021-08-29 Standard Tshwane (GTP) 5 4 2 Yes Analysis
51 2021 Alekhine Open (C) 2021-08-14 2021-08-15 Standard Tshwane (GTP) 5 5 4 Yes Analysis
52 2019 D3 Team League (U13) 2019-07-20 2019-07-20 Standard Tshwane (GTP) 5 5 1.5 Yes Analysis
53 D3 Primary School League Cluster 4 2019 (U13) 2019-05-12 2019-05-12 Standard Tshwane (GTP) 5 5 5 Yes Analysis
54 2019 D3 Individuals (U13 Boys) 2019-04-13 2019-04-13 Standard Tshwane (GTP) 5 5 3 Yes Analysis
55 2018 D3 Tshwane North Individual Chess Championships (U11 Mixed) 2018-03-24 2018-03-24 Standard Tshwane (GTP) 5 5 3 Yes Analysis

Top 3 Streaks

# Games Start End
1 12 Tournament
2024 Tshwane South School District CLOSED Individual Championships
Tournament
2024 Alekhine Open Chess Tournament
date
2024-05-11
rnd
1
type
Standard
result
1
date
2024-08-09
rnd
2
type
Standard
result
0.5
Opponent
Visser, E (Elijah)
Opponent
Mkotong, B (Boipelo)
2 12 Tournament
2023 Etienne Lewis Closed Tournament
Tournament
2023 Moja Chess Extravaganza
date
2023-08-25
rnd
1
type
Standard
result
1
date
2023-09-30
rnd
1
type
Standard
result
1
Opponent
Du Toit, B (Bonicia Bianca)
Opponent
Katleho, P (Phakisi)
3 11 Tournament
2024 Tshwane Chess Club Clash
Tournament
2025 Piet Robbertse Fide Rated Open Chess Tournament
date
2024-10-12
rnd
4
type
Standard
result
0.5
date
2025-02-02
rnd
4
type
Standard
result
0.5
Opponent
Deysel, K (Kaleb)
Opponent
Lodi, K (Khotso)
# Games Start End
1 12 Tournament
2024 Tshwane South School District CLOSED Individual Championships
Tournament
2024 Alekhine Open Chess Tournament
date
2024-05-11
rnd
1
type
Standard
result
1
date
2024-08-09
rnd
2
type
Standard
result
0.5
Opponent
Visser, E (Elijah)
Opponent
Mkotong, B (Boipelo)
2 12 Tournament
2023 Etienne Lewis Closed Tournament
Tournament
2023 Moja Chess Extravaganza
date
2023-08-25
rnd
1
type
Standard
result
1
date
2023-09-30
rnd
1
type
Standard
result
1
Opponent
Du Toit, B (Bonicia Bianca)
Opponent
Katleho, P (Phakisi)
3 11 Tournament
2024 Tshwane Chess Club Clash
Tournament
2025 Piet Robbertse Fide Rated Open Chess Tournament
date
2024-10-12
rnd
4
type
Standard
result
0.5
date
2025-02-02
rnd
4
type
Standard
result
0.5
Opponent
Deysel, K (Kaleb)
Opponent
Lodi, K (Khotso)
# Games Start End
1 9 Tournament
D4 Individuals 2022
Tournament
Afrikaanse Hoër Seunskool Interne Skaak KampioenskAP 2022
date
2022-04-23
rnd
5
type
Rapid
result
0.5
date
2022-09-22
rnd
6
type
Rapid
result
1
Opponent
Potgieter, A (Albert)
Opponent
Mouton, J (Jacques)
2 3 Tournament
2021 Affies Interhuis
Tournament
2021 Affies Interhuis
date
2021-10-28
rnd
2
type
Rapid
result
1
date
2021-10-28
rnd
4
type
Rapid
result
1
Opponent
Blom, J (Jess)
Opponent
Van Rooy, HF (Herculaas)
3 2 Tournament
Gauteng Top Schools 2024
Tournament
Gauteng Top Schools 2024
date
2024-10-05
rnd
4
type
Rapid
result
1
date
2024-10-05
rnd
5
type
Rapid
result
1
Opponent
Moyo, S (Sibusiso)
Opponent
Du Toit, SJM (Stephanus (Matteo))
No games found.
# Games Start End
# Games Start End
1 7 Tournament
2024 Tshwane Chess Club Clash
Tournament
2025 Piet Robbertse Fide Rated Open Chess Tournament
date
2024-10-12
rnd
5
type
Standard
result
1
date
2025-02-01
rnd
1
type
Standard
result
1
Opponent
Swart, Z (Zander)
Opponent
Jacobs, L (Lillith)
2 6 Tournament
D4 Tshwane South District Schools Teams Chess Tournament 2024
Tournament
2024 Alekhine Open Chess Tournament
date
2024-08-03
rnd
1
type
Standard
result
1
date
2024-08-09
rnd
1
type
Standard
result
1
Opponent
Senekal, F (Frederick)
Opponent
Waring, G (Gabriel)
3 5 Tournament
Gauteng Schools Individuals Finals 2024
Tournament
2024 Etienne Lewis
date
2024-08-17
rnd
3
type
Standard
result
1
date
2024-08-31
rnd
2
type
Standard
result
1
Opponent
Mosae, N (Ntando)
Opponent
Diatshwana, K (Keoagile)
# Games Start End
1 7 Tournament
2024 Tshwane Chess Club Clash
Tournament
2025 Piet Robbertse Fide Rated Open Chess Tournament
date
2024-10-12
rnd
5
type
Standard
result
1
date
2025-02-01
rnd
1
type
Standard
result
1
Opponent
Swart, Z (Zander)
Opponent
Jacobs, L (Lillith)
2 6 Tournament
D4 Tshwane South District Schools Teams Chess Tournament 2024
Tournament
2024 Alekhine Open Chess Tournament
date
2024-08-03
rnd
1
type
Standard
result
1
date
2024-08-09
rnd
1
type
Standard
result
1
Opponent
Senekal, F (Frederick)
Opponent
Waring, G (Gabriel)
3 5 Tournament
Gauteng Schools Individuals Finals 2024
Tournament
2024 Etienne Lewis
date
2024-08-17
rnd
3
type
Standard
result
1
date
2024-08-31
rnd
2
type
Standard
result
1
Opponent
Mosae, N (Ntando)
Opponent
Diatshwana, K (Keoagile)
# Games Start End
1 4 Tournament
D4 Individuals 2022
Tournament
Afrikaanse Hoër Seunskool Interne Skaak KampioenskAP 2022
date
2022-04-23
rnd
7
type
Rapid
result
1
date
2022-09-22
rnd
3
type
Rapid
result
1
Opponent
Visser, N (Nico)
Opponent
Du Toit, DR (Daniel)
2 3 Tournament
2021 Affies Interhuis
Tournament
2021 Affies Interhuis
date
2021-10-28
rnd
2
type
Rapid
result
1
date
2021-10-28
rnd
4
type
Rapid
result
1
Opponent
Blom, J (Jess)
Opponent
Van Rooy, HF (Herculaas)
3 2 Tournament
Gauteng Top Schools 2024
Tournament
Gauteng Top Schools 2024
date
2024-10-05
rnd
4
type
Rapid
result
1
date
2024-10-05
rnd
5
type
Rapid
result
1
Opponent
Moyo, S (Sibusiso)
Opponent
Du Toit, SJM (Stephanus (Matteo))
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 Du Toit ,SJM (Stephanus (Matteo) Johannes Matheus) 5 2 -85 3 1 -141.7 2 1 0 0 0 0
1488.2 1403.2 1444.9 1346.5 1059.4 1488.2 0 0
2 Ferreira ,H (Hechter) 4 1 -212.5 2 0.5 -212.5 2 0.5 -212.5 0 0 0
1141.6 929.1 1230.8 929.1 611.8 929.1 0 0
3 Gounder ,A (Arun) 3 3 425 3 3 425 0 0 0 0 0 0
1402 1827 1402.9 1827 0 0 0 0
4 Venter ,Z (Zanri) 3 2 141.7 3 2 141.7 0 0 0 0 0 0
1248.6 1390.2 1235.4 1390.2 0 0 0 0
5 Rust ,C (Christoph) 3 3 425 3 3 425 0 0 0 0 0 0
1467.7 1892.7 1464.4 1892.7 0 0 0 0
6 Fidos ,E (Eric) 3 2 141.7 3 2 141.7 0 0 0 0 0 0
1438.2 1579.8 1440.8 1579.8 0 0 0 0
7 Ngobeni ,N (Njabulo) 3 0.5 -283.3 3 0.5 -283.3 0 0 0 0 0 0
1470.4 1187.1 1470.5 1187.1 0 0 0 0
8 Kruger ,N (Neeke) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1765.7 1624 1787.5 1624 0 0 0 0
9 Ndubane ,D (Dumsane) 3 0.5 -283.3 3 0.5 -283.3 0 0 0 0 0 0
1239.2 955.9 1247.5 955.9 0 0 0 0
10 De Vries ,MA (Andrio) 3 2.5 283.3 3 2.5 283.3 0 0 0 0 0 0
1558.7 1842 1556.5 1842 0 0 0 0

Norms

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