PLAYER PAGE

Personal

Jonker, T (Tertius)

Chess SA id

1120109887

FIDE id

?

Date of birth

2012-08-03 (U14)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

86.7

Junior GPX Points

1413.3

Item Main Standard Rapid Blitz
Rating 1505.2 1513.1 1200 1199.7
Raw rating 1505.2 1513.1 1200 1198.7
Weighted rating 1448.6 1445.7 1200 1199.7
Weighted performance 1490.9 1491.9 0 0
Floor 1023.2 1035.2 700 700
K-factor 32 32 36 36
Min/Max rating change allowed 107.3 106.1 165.8 166.1
Highest rating 1525.3
2025-09-01
1540.1
2025-09-01
1200
2018-10-01
1200
2018-10-01
Highest raw rating 1523.2
2025-09-01
1535.2
2025-09-01
1200
2024-02-01
1200
2024-02-01
Highest weighted rating 1448.6
2025-09-30
1445.7
2025-09-30
1200
2018-10-01
1200
2018-10-01
Highest weighted performance 1525.3
2025-09-01
1540.1
2025-09-01
1200
2024-02-01
1200
2024-02-01

Prediction
Item Main Standard Rapid Blitz
Rating change 0 0 0 -0.1
New rating 1505.2 1513.1 1200 1199.6
Analysis
Rating 1505.2 1513.1 1200 1199.7
Raw rating 1505.2 1513.1 1200 1198.7
Weighted rating 1448.6 1445.7 1200
Weighted performance 1490.9 1491.9 0
K-factor 32 32 36 36
Floor 1023.2 1035.2 700 700
Max/Min rating change allowed 107.3 106.1 165.8 166.1
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 1505.2 1513.1 1200 1198.7
New weighted rating 1455.9 1453.9 1200 1199.6
New weighted performance 1490.4 1491.4 0 0
Temp new rating 1505.2 1513.1 1200 1199.6
Temp new rating +/- 0 0 0 -0.1
Final new rating +/- 0 0 0 -0.1
New rating 1505.2 1513.1 1200 1199.6
New K-factor 32 32 36 36
New floor 1023.2 1035.2 700 700

Item Main Standard Rapid Blitz
0 0 0 0
77 69 0 8
77 77 0 0
51 51 0 0
45 45 0 0
0 0 0 0
History 267 259 0 8

Games since
Main
159
Standard
151
Rapid
0
Blitz
8
Gender Male
Age group U14
Region Tshwane (GTP)
Province Gauteng (GT)
Main
RSA Province Region
Overall 1223 424 156
Male 1055 359 132
U14 168 52 17
U14 Male 136 44 15
Standard
RSA Province Region
Overall 1076 399 152
Male 921 336 129
U14 154 47 17
U14 Male 124 40 15
Rapid
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U14 -1 -1 -1
U14 Male -1 -1 -1
Blitz
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U14 -1 -1 -1
U14 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 77 40 51.95 16.6 1432.5 1449.1
Standard 69 37.5 54.35 37 1423.2 1460.2
Rapid 0 0 0 0 0 0
Blitz 8 2.5 31.25 -159.4 1512.8 1353.4
History
Games Score % Dp AvgOpp Performance
Main 267 147.5 55.24 44.6 1307.1 1351.7
Standard 259 145 55.98 50.9 1300.8 1351.6
Rapid 0 0 0 0 0 0
Blitz 8 2.5 31.25 -159.4 1512.8 1353.4

Date Main Standard Rapid Blitz
2025-09-30 1505.2 1513.1 1200 1198.7
2025-09-01 1523.2 1535.2 1200 1198.7
2025-08-01 1482.7 1494.9 1200 1198.7
2025-07-01 1451 1447.6 1200 1200
2025-06-01 1452.3 1448.9 1200 1200
2025-05-01 1430.6 1419 1200 1200
2025-04-01 1428.9 1417.4 1200 1200
2025-03-01 1465.1 1459.3 1200 1200
2025-02-01 1517.2 1513.5 1200 1200
2025-01-01 1505.3 1500.7 1200 1200
2024-12-01 1423.6 1413.3 1200 1200
2024-11-01 1423.6 1413.3 1200 1200
2024-10-01 1399.7 1381.6 1200 1200
2024-09-01 1490.7 1491 1200 1200
2024-08-01 1472.8 1471.1 1200 1200
2024-07-01 1442.7 1439.8 1200 1200
2024-06-01 1442.7 1439.8 1200 1200
2024-08-01 1243.6 1227 1200 1200
2024-04-01 1243.6 1227 1200 1200
2024-03-01 1243.6 1227 1200 1200
2024-02-01 1329.4 1324.2 1200 1200
2024-01-01 1340.5 1349.8 1200 1200
2023-12-01 1340.5 1349.8 1200 1200
2023-11-01 1340.5 1349.8 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 Alekhine Open (C) 2025-09-06 2025-09-07 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
2 2025 Tshwane North District CLOSED Team Championships (D3) (U13 Open) 2025-08-16 2025-08-16 Standard Tshwane (GTP) 5 5 4 Yes Analysis
3 2025 Etienne Lewis Closed Chess Tournament (U14) 2025-08-08 2025-08-10 Standard Tshwane (GTP) 7 7 4.5 Yes Analysis
4 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U13 Open) 2025-07-26 2025-07-26 Standard Tshwane (GTP) 5 5 3 Yes Analysis
5 South African Open 2025 (U14 Open) 2025-07-03 2025-07-05 Standard Johannesburg Metro (GJM) 5 5 3.5 Yes Analysis
6 South African Open 2025 (Blitz) 2025-07-02 2025-07-02 Blitz Johannesburg Metro (GJM) 9 8 2.5 Yes Analysis
7 2025 Elise Steenkamp Open Chess Tournament (Bishop) 2025-06-14 2025-06-15 Standard Tshwane (GTP) 5 5 3 Yes Analysis
8 2025 Tshwane North School District CLOSED Individual Chess Championship (U13 Open) 2025-05-24 2025-05-24 Standard Tshwane (GTP) 5 5 4 Yes Analysis
9 2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5 (U13 Open) 2025-05-10 2025-05-10 Standard Tshwane (GTP) 5 5 4 Yes Analysis
10 South African Junior Closed Chess Championships 2025 (U14 Open) 2025-03-31 2025-04-05 Standard Cape Winelands (WCW) 9 8 2.5 Yes Analysis
11 2025 Chris Greyling Open Chess Tournament (C) 2025-03-15 2025-03-15 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
12 AHS Open Chess Tournament 2025 (C) 2025-03-01 2025-03-01 Standard Tshwane (GTP) 5 5 2 Yes Analysis
13 2025 Piet Robbertse Fide Rated Open Chess Tournament (B) 2025-02-01 2025-02-02 Standard Tshwane (GTP) 5 4 0 Yes Analysis
14 2025 Tshwane Chess OPEN Registration Tournament (A1) 2025-01-25 2025-01-25 Standard Tshwane (GTP) 5 5 2 Yes Analysis
Last 500 tournaments since 01 January 2018
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 2025 Alekhine Open (C) 2025-09-06 2025-09-07 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
2 2025 Tshwane North District CLOSED Team Championships (D3) (U13 Open) 2025-08-16 2025-08-16 Standard Tshwane (GTP) 5 5 4 Yes Analysis
3 2025 Etienne Lewis Closed Chess Tournament (U14) 2025-08-08 2025-08-10 Standard Tshwane (GTP) 7 7 4.5 Yes Analysis
4 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U13 Open) 2025-07-26 2025-07-26 Standard Tshwane (GTP) 5 5 3 Yes Analysis
5 South African Open 2025 (U14 Open) 2025-07-03 2025-07-05 Standard Johannesburg Metro (GJM) 5 5 3.5 Yes Analysis
6 South African Open 2025 (Blitz) 2025-07-02 2025-07-02 Blitz Johannesburg Metro (GJM) 9 8 2.5 Yes Analysis
7 2025 Elise Steenkamp Open Chess Tournament (Bishop) 2025-06-14 2025-06-15 Standard Tshwane (GTP) 5 5 3 Yes Analysis
8 2025 Tshwane North School District CLOSED Individual Chess Championship (U13 Open) 2025-05-24 2025-05-24 Standard Tshwane (GTP) 5 5 4 Yes Analysis
9 2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5 (U13 Open) 2025-05-10 2025-05-10 Standard Tshwane (GTP) 5 5 4 Yes Analysis
10 South African Junior Closed Chess Championships 2025 (U14 Open) 2025-03-31 2025-04-05 Standard Cape Winelands (WCW) 9 8 2.5 Yes Analysis
11 2025 Chris Greyling Open Chess Tournament (C) 2025-03-15 2025-03-15 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
12 AHS Open Chess Tournament 2025 (C) 2025-03-01 2025-03-01 Standard Tshwane (GTP) 5 5 2 Yes Analysis
13 2025 Piet Robbertse Fide Rated Open Chess Tournament (B) 2025-02-01 2025-02-02 Standard Tshwane (GTP) 5 4 0 Yes Analysis
14 2025 Tshwane Chess OPEN Registration Tournament (A1) 2025-01-25 2025-01-25 Standard Tshwane (GTP) 5 5 2 Yes Analysis
15 Mzansi Interprovincial Youth Chess Championships 2024 (U14 Open Premier) 2024-12-16 2024-12-19 Standard Capricorn (LCP) 7 7 4.5 Yes Analysis
16 Gauteng Inter-Region at UJ 2024 (U14 Candidates) 2024-12-07 2024-12-08 Standard Johannesburg Metro (GJM) 5 5 5 Yes Analysis
17 Gauteng Top Schools 2024 (U13 Open) 2024-10-04 2024-10-04 Standard Ekurhuleni (GE) 5 5 4 Yes Analysis
18 Centurion Chess Open Tournament 2024 (B) 2024-09-21 2024-09-21 Standard Tshwane (GTP) 5 5 1.5 Yes Analysis
19 2024 Etienne Lewis (U14) 2024-08-30 2024-09-01 Standard Tshwane (GTP) 7 7 4 Yes Analysis
20 Gauteng Schools Individuals Finals 2024 (U13 Boys) 2024-08-16 2024-08-16 Standard Ekurhuleni (GE) 5 5 3 Yes Analysis
21 2024 Tshwane North School District Team League Finals (U13) 2024-08-03 2024-08-03 Standard Tshwane (GTP) 5 5 4 Yes Analysis
22 2024 Tshwane North School District Cluster 4 & 5 Team League (U13) 2024-07-20 2024-07-20 Standard Tshwane (GTP) 5 5 4 Yes Analysis
23 2024 Tshwane North School District CLOSED Individual Champioships (U13 Boys) 2024-05-11 2024-05-11 Standard Tshwane (GTP) 5 5 4.5 Yes Analysis
24 District 3 Cluster 4 and 5 Individuals 2024 (U13 Boys) 2024-05-04 2024-05-04 Standard Tshwane (GTP) 5 5 4.5 Yes Analysis
25 2024 Tshwane Chess AHS Open Chess Tournament (C2) 2024-02-24 2024-02-24 Standard Tshwane (GTP) 5 3 1 Yes Analysis
26 2024 Piet Robbertse Open Chess Tournament (C) 2024-02-03 2024-02-04 Standard Tshwane (GTP) 5 5 2 Yes Analysis
27 2024 Blou Bul Open Chess Tournament (C) 2024-02-10 2024-02-10 Standard Tshwane (GTP) 5 5 1 Yes Analysis
28 2024 Tshwane Chess OPEN Registration Tournament (C2) 2024-01-27 2024-01-27 Standard Tshwane (GTP) 5 5 1 Yes Analysis
29 2024 Gauteng Inter-Region Chess Championship (U12B) 2024-01-13 2024-01-14 Standard Tshwane (GTP) 5 5 4 Yes Analysis
30 2023 Tuks Open Chess Tournament (C) 2023-10-07 2023-10-07 Standard Tshwane (GTP) 5 5 2 Yes Analysis
31 2023 Gauteng Top Schools (U11 Mixed) 2023-08-18 2023-08-18 Standard West Rand (GWR) 5 5 2.5 Yes Analysis
32 2023 Tshwane North School District CLOSED League Championships (D3) 2023-08-12 2023-08-12 Standard Tshwane (GTP) 5 5 5 Yes Analysis
33 2023 Etienne Lewis Closed Tournament (U12) 2023-08-25 2023-08-27 Standard Tshwane (GTP) 7 7 4 Yes Analysis
34 2023 Lubowski Open Tournament (C) 2023-06-24 2023-06-25 Standard Tshwane (GTP) 5 4 1 Yes Analysis
35 2023 Tshwane North School District CLOSED Individual Championships (D3) 2023-05-13 2023-05-13 Standard Tshwane (GTP) 5 5 4 Yes Analysis
36 2023 Mid Gauteng Open Tournament (C) 2023-05-06 2023-05-06 Standard Tshwane (GTP) 5 5 2 Yes Analysis
37 Gauteng Schools Individual Finals 2023 (U11 Boys) 2023-05-26 2023-05-26 Standard Ekurhuleni (GE) 5 5 3 Yes Analysis
38 Tuks Junior Developmental Chess Tournament 2023 (Blue) 2023-03-18 2023-03-18 Standard Tshwane (GTP) 5 5 1.5 Yes Analysis
39 2023 Tshwane Chess Open Registration Tournament (C2) 2023-01-28 2023-01-28 Standard Tshwane (GTP) 5 5 2 Yes Analysis
40 2022 South African Junior Team Chess Championships (U12 Open) 2022-12-04 2022-12-08 Standard 4 Knights (4K) 7 4 2 Yes Analysis
41 2022 Etienne Lewis (U12 Open) 2022-09-02 2022-09-04 Standard Tshwane (GTP) 7 7 3 Yes Analysis
42 Tuks Junior Developmental Tournament 2022 (Blue) 2022-08-06 2022-08-06 Standard Tshwane (GTP) 5 4 1 Yes Analysis
43 2022 Gauteng Schools Team Championships (U11 Open) 2022-08-27 2022-08-27 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
44 2022 Jacaranda Round Robin (R) 2022-07-30 2022-07-30 Standard Tshwane (GTP) 5 5 3 Yes Analysis
45 Tuks Junior Chess Club Developmental Tournament 2022 (Red) 2022-06-17 2022-06-17 Standard Tshwane (GTP) 5 5 4 Yes Analysis
46 2022 Blou Bul Open (D) 2022-06-25 2022-06-26 Standard Tshwane (GTP) 5 5 2 Yes Analysis
47 2022 Gauteng Schools Individual Chess Championship (U11 Boys) 2022-06-18 2022-06-18 Standard Ekurhuleni (GE) 5 5 3 Yes Analysis
48 2022 D3 Cluster City Schools (U11) 2022-04-23 2022-04-23 Standard Tshwane (GTP) 5 5 3 Yes Analysis
49 2019 Centurion Open (E+F) 2019-09-28 2019-09-28 Standard Tshwane (GTP) 5 4 2 Yes Analysis
50 Wonderboom Interhuis 2019 (U9) 2019-05-04 2019-05-22 Standard Tshwane (GTP) 7 7 4 Yes Analysis
51 2019 TuksChess Open (D) 2019-02-23 2019-02-23 Standard Tshwane (GTP) 7 6 2 Yes Analysis

Top 3 Streaks

# Games Start End
1 10 Tournament
District 3 Cluster 4 and 5 Individuals 2024
Tournament
2024 Tshwane North School District CLOSED Individual Champioships
date
2024-05-04
rnd
1
type
Standard
result
1
date
2024-05-11
rnd
5
type
Standard
result
1
Opponent
Marope, N (Nathan)
Opponent
Grahan, T (Tylo)
2 8 Tournament
2023 Lubowski Open Tournament
Tournament
2023 Gauteng Top Schools
date
2023-06-25
rnd
5
type
Standard
result
1
date
2023-08-18
rnd
2
type
Standard
result
0.5
Opponent
Mathe, T (Thubang)
Opponent
Venter, D (Dian)
3 7 Tournament
Gauteng Top Schools 2024
Tournament
Mzansi Interprovincial Youth Chess Championships 2024
date
2024-10-04
rnd
5
type
Standard
result
1
date
2024-12-16
rnd
1
type
Standard
result
1
Opponent
Jonker, R (Reagan)
Opponent
Douglas, J (Jody)
# Games Start End
1 10 Tournament
District 3 Cluster 4 and 5 Individuals 2024
Tournament
2024 Tshwane North School District CLOSED Individual Champioships
date
2024-05-04
rnd
1
type
Standard
result
1
date
2024-05-11
rnd
5
type
Standard
result
1
Opponent
Marope, N (Nathan)
Opponent
Grahan, T (Tylo)
2 8 Tournament
2023 Lubowski Open Tournament
Tournament
2023 Gauteng Top Schools
date
2023-06-25
rnd
5
type
Standard
result
1
date
2023-08-18
rnd
2
type
Standard
result
0.5
Opponent
Mathe, T (Thubang)
Opponent
Venter, D (Dian)
3 7 Tournament
Gauteng Top Schools 2024
Tournament
Mzansi Interprovincial Youth Chess Championships 2024
date
2024-10-04
rnd
5
type
Standard
result
1
date
2024-12-16
rnd
1
type
Standard
result
1
Opponent
Jonker, R (Reagan)
Opponent
Douglas, J (Jody)
No games found.
# Games Start End
# Games Start End
1 1 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
9
type
Blitz
result
0.5
date
2025-07-02
rnd
9
type
Blitz
result
0.5
Opponent
Pillay, L (Leeyah)
Opponent
Pillay, L (Leeyah)
2 1 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
6
type
Blitz
result
1
date
2025-07-02
rnd
6
type
Blitz
result
1
Opponent
Dikolomela, T (Tlhogi)
Opponent
Dikolomela, T (Tlhogi)
3 1 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
4
type
Blitz
result
1
date
2025-07-02
rnd
4
type
Blitz
result
1
Opponent
Du Toit, S (Sarah-Anne)
Opponent
Du Toit, S (Sarah-Anne)
# Games Start End
1 7 Tournament
Gauteng Top Schools 2024
Tournament
Mzansi Interprovincial Youth Chess Championships 2024
date
2024-10-04
rnd
5
type
Standard
result
1
date
2024-12-16
rnd
1
type
Standard
result
1
Opponent
Jonker, R (Reagan)
Opponent
Douglas, J (Jody)
2 7 Tournament
2023 Lubowski Open Tournament
Tournament
2023 Gauteng Top Schools
date
2023-06-25
rnd
5
type
Standard
result
1
date
2023-08-18
rnd
1
type
Standard
result
1
Opponent
Mathe, T (Thubang)
Opponent
Pringle, N (Noah)
3 6 Tournament
2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5
Tournament
2025 Tshwane North School District CLOSED Individual Chess Championship
date
2025-05-10
rnd
4
type
Standard
result
1
date
2025-05-24
rnd
4
type
Standard
result
1
Opponent
De Villiers, IP (Izak Petrus)
Opponent
Swart, R (Reyhan)
# Games Start End
1 7 Tournament
Gauteng Top Schools 2024
Tournament
Mzansi Interprovincial Youth Chess Championships 2024
date
2024-10-04
rnd
5
type
Standard
result
1
date
2024-12-16
rnd
1
type
Standard
result
1
Opponent
Jonker, R (Reagan)
Opponent
Douglas, J (Jody)
2 7 Tournament
2023 Lubowski Open Tournament
Tournament
2023 Gauteng Top Schools
date
2023-06-25
rnd
5
type
Standard
result
1
date
2023-08-18
rnd
1
type
Standard
result
1
Opponent
Mathe, T (Thubang)
Opponent
Pringle, N (Noah)
3 6 Tournament
2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5
Tournament
2025 Tshwane North School District CLOSED Individual Chess Championship
date
2025-05-10
rnd
4
type
Standard
result
1
date
2025-05-24
rnd
4
type
Standard
result
1
Opponent
De Villiers, IP (Izak Petrus)
Opponent
Swart, R (Reyhan)
No games found.
# Games Start End
# Games Start End
1 1 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
6
type
Blitz
result
1
date
2025-07-02
rnd
6
type
Blitz
result
1
Opponent
Dikolomela, T (Tlhogi)
Opponent
Dikolomela, T (Tlhogi)
2 1 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
4
type
Blitz
result
1
date
2025-07-02
rnd
4
type
Blitz
result
1
Opponent
Du Toit, S (Sarah-Anne)
Opponent
Du Toit, S (Sarah-Anne)

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 Smith ,E (Eduan) 7 2 -182.1 7 2 -182.1 0 0 0 0 0 0
1390.9 1208.7 1392.1 1208.7 0 0 0 0
2 Grahan ,T (Tylo) 6 4 141.7 6 4 141.7 0 0 0 0 0 0
1253.4 1395.1 1238.9 1395.1 0 0 0 0
3 Haupt ,J (Joshua) 4 2 0 4 2 0 0 0 0 0 0 0
1408.2 1408.2 1402.9 1408.2 0 0 0 0
4 Hlatshwayo ,Q (Qhawe) 3 3 425 3 3 425 0 0 0 0 0 0
1372 1797 1363.9 1797 0 0 0 0
5 Mahlangu ,NP (Nkosinathi Phillip) 3 0 -425 3 0 -425 0 0 0 0 0 0
1272 847 1267.1 847 0 0 0 0
6 Naude ,J (Johan) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1304.7 1163 1319.5 1163 0 0 0 0
7 Yang ,S (Selina) 2 2 425 2 2 425 0 0 0 0 0 0
1419.2 1844.2 1418.4 1844.2 0 0 0 0
8 Reddy ,KS (Kashen Shivaan) 2 1.5 212.5 2 1.5 212.5 0 0 0 0 0 0
1356.5 1569 1354.4 1569 0 0 0 0
9 Pooe ,L (Lebogang) 2 2 425 2 2 425 0 0 0 0 0 0
1217.2 1642.2 1211.9 1642.2 0 0 0 0
10 Meades ,RA (Ruben Abraham) 2 0 -425 2 0 -425 0 0 0 0 0 0
1297.1 872.1 1281.7 872.1 0 0 0 0

Norms

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