PLAYER PAGE

Personal

Joubert, J (Joshua)

Chess SA id

1150134895

FIDE id

?

Date of birth

2015-09-16 (U12)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-12-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item Main Standard Rapid Blitz
Rating 1508.6 1502.8 1235.1 1034.2
Raw rating 1504.7 1501 1235.1 1034.2
Weighted rating 1508.6 1502.8 1199 1034.2
Weighted performance 1432.4 1425.4 1009.7 0
Floor 1057.4 1061.6 735.1 700
K-factor 32 32 36 36
Min/Max rating change allowed 107.4 108 157.7 210
Highest rating 1558.9
2024-06-01
1561.6
2025-07-01
1235.1
2025-05-05
1200
2018-10-01
Highest raw rating 1557.4
2025-07-01
1561.6
2025-07-01
1235.1
2025-05-05
1200
2019-12-01
Highest weighted rating 1557.4
2025-03-01
1561.6
2025-02-01
1235.1
2018-10-01
1200
2018-10-01
Highest weighted performance 1558.9
2025-07-01
1561.6
2024-06-01
1200
2019-12-01
1200
2019-12-01

Prediction
Item Main Standard Rapid Blitz
Rating change 1.1 1.6 0 0
New rating 1509.7 1504.3 1235.1 1034.2
Analysis
Rating 1508.6 1502.8 1235.1 1034.2
Raw rating 1504.7 1501 1235.1 1034.2
Weighted rating 1508.6 1502.8 1199
Weighted performance 1432.4 1425.4 1009.7
K-factor 32 32 36 36
Floor 1057.4 1061.6 735.1 700
Max/Min rating change allowed 107.4 108 157.7 210
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 1504.7 1501 1235.1 1034.2
New weighted rating 1509.7 1504.3 1204.3 1034.2
New weighted performance 1422.6 1415.7 1001.6 0
Temp new rating 1509.7 1504.3 1235.1 1034.2
Temp new rating +/- 1.1 1.6 0 0
Final new rating +/- 1.1 1.6 0 0
New rating 1509.7 1504.3 1235.1 1034.2
New K-factor 32 32 36 36
New floor 1057.4 1061.6 735.1 700

Item Main Standard Rapid Blitz
0 0 0 0
63 52 11 0
90 78 12 0
71 65 6 0
69 52 9 8
10 5 5 0
History 303 252 43 8

Games since
Main
153
Standard
130
Rapid
23
Blitz
0
Gender Male
Age group U12
Region Johannesburg Metro (GJM)
Province Gauteng (GT)
Main
RSA Province Region
Overall 1192 410 143
Male 1026 344 118
U12 114 46 16
U12 Male 89 31 13
Standard
RSA Province Region
Overall 1131 417 140
Male 971 352 117
U12 110 50 18
U12 Male 83 34 15
Rapid
RSA Province Region
Overall 1481 261 114
Male 1151 198 95
U12 278 41 16
U12 Male 205 31 15
Blitz
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U12 -1 -1 -1
U12 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 63 29.5 46.83 -27 1416.6 1389.7
Standard 52 26 50 0 1396.3 1396.3
Rapid 11 3.5 31.82 -154.5 1513 1358.5
Blitz 0 0 0 0 0 0
History
Games Score % Dp AvgOpp Performance
Main 303 171.5 56.6 56.1 1278 1334.1
Standard 252 156 61.9 101.2 1289.4 1390.6
Rapid 43 15.5 36.05 -118.6 1263.9 1145.3
Blitz 8 0 0 -425 992.1 567.1

Date Main Standard Rapid Blitz
2026-01-01 1504.7 1501 1235.1 1034.2
2025-11-30 1510.8 1510.9 1235.1 1034.2
2025-11-01 1510.8 1510.9 1235.1 1034.2
2025-09-30 1510.8 1510.9 1235.1 1034.2
2025-09-01 1510.8 1510.9 1235.1 1034.2
2025-08-01 1557.4 1561.6 1235.1 1034.2
2025-07-01 1557.4 1561.6 1235.1 1034.2
2025-06-01 1481.1 1468.2 1235.1 1034.2
2025-05-01 1479.3 1468.4 1235.1 1034.2
2025-04-01 1476.8 1463.4 1148.6 1034.2
2025-03-01 1477.5 1464 1148.6 1034.2
2025-02-01 1527 1514.4 1148.6 1034.2
2025-01-01 1541.2 1528.7 1148.6 1034.2
2024-12-01 1504.2 1491.9 1148.6 1034.2
2024-11-01 1504.2 1491.9 1148.6 1034.2
2024-10-01 1537.9 1531.6 1148.6 1034.2
2024-09-01 1537.9 1531.6 1148.6 1034.2
2024-11-01 1542.9 1539 1148.6 1034.2
2024-07-01 1542.9 1539 1148.6 1034.2
2024-06-01 1494.6 1501.7 1148.6 1034.2
2024-05-01 1352.8 1320.7 1148.6 1034.2
2024-04-01 1374 1320.7 1142.2 1034.2
2024-03-01 1342.3 1320.7 1003.8 1034.2
2024-02-01 1408.2 1394.3 1003.8 1034.2

Comming soon.

Tournaments

No tournaments found.
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
No tournaments found.
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
Last 500 tournaments since 01 January 2018
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 Gauteng Inter-Region at Emerald Resort 2025 (U12 Championship) 2025-12-06 2025-12-07 Standard Sedibeng (GSV) 5 5 3 Yes Analysis
2 JMC Closed 2025 (U12) 2025-08-09 2025-08-10 Standard Johannesburg Metro (GJM) 5 5 2 Yes Analysis
3 Third Knight Riders Junior Open 2025 (B+C) 2025-06-22 2025-06-22 Standard Johannesburg Metro (GJM) 5 4 2.5 Yes Analysis
4 West Rand Open 2.0 2025 (U12) 2025-06-07 2025-06-07 Standard West Rand (GWR) 5 5 5 Yes Analysis
5 JMC Helpmekaar 2025 (U12) 2025-06-01 2025-06-01 Standard Johannesburg Metro (GJM) 5 5 3.5 Yes Analysis
6 JMC Crawford Sandton 2025 (C) 2025-05-10 2025-05-10 Standard Johannesburg Metro (GJM) 5 5 2 Yes Analysis
7 FIDE World Cadet & Youth Rapid & Blitz Championships 2025 (Rapid) 2025-04-13 2025-04-15 Rapid Greece (GRE) 11 11 3.5 Yes Analysis
8 South African Junior Closed Chess Championships 2025 (U10 Open) 2025-03-31 2025-04-05 Standard Cape Winelands (WCW) 9 9 4.5 Yes Analysis
9 2025 Chris Greyling Open Chess Tournament (U12) 2025-03-15 2025-03-15 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
10 MCA Summer March 2025 (Advanced) 2025-03-08 2025-03-08 Standard Johannesburg Metro (GJM) 5 5 0 Yes Analysis
11 JMC Kick Off 2025 (B) 2025-02-02 2025-02-02 Standard Johannesburg Metro (GJM) 5 4 0 Yes Analysis
12 2025 Tshwane Chess OPEN Registration Tournament (U12) 2025-01-25 2025-01-25 Standard Tshwane (GTP) 5 5 3 Yes Analysis
13 Gauteng Inter-Region at UJ 2024 (U10 Open) 2024-12-07 2024-12-08 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
14 2024 Tshwane Chess Club Clash (Open) 2024-10-12 2024-10-12 Standard Tshwane (GTP) 5 5 2 Yes Analysis
15 Gauteng Top Schools 2024 (U11 Open) 2024-10-04 2024-10-04 Standard Ekurhuleni (GE) 5 5 4 Yes Analysis
16 Bojanala's FIDE In The Sparkling Waters 2024 (Junior Champs) 2024-08-17 2024-08-17 Standard Bojanala Platina (NBR) 5 5 3.5 Yes Analysis
17 JMC Closed 2024 (U10) 2024-08-09 2024-08-09 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
18 Second Knight Riders Juniors Open Chess Tournament 2024 (U10) 2024-06-08 2024-06-08 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
19 JMC Trinityhouse Little Falls 2024 (U10) 2024-06-02 2024-06-02 Standard Johannesburg Metro (GJM) 5 5 4.5 Yes Analysis
20 Chess Power House May Open 2024 (D) 2024-05-25 2024-05-25 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
21 JMC Crawford International Sandton 2024 (U10) 2024-05-11 2024-05-11 Standard Johannesburg Metro (GJM) 5 5 5 Yes Analysis
22 South African Junior Closed Chess Championship 2024 (U10 Open) 2024-04-27 2024-05-01 Standard Ekurhuleni (GE) 9 8 2 Yes Analysis
23 JMC Helpmekaar Kollege Tournament 2024 (U10) 2024-05-04 2024-05-04 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
24 Hermanus Chess Club Open 2024 (Intermediate) 2024-04-20 2024-04-20 Rapid Overberg (WOS) 7 7 3.5 Yes Analysis
25 CPH St Andrew's Rapid 2024 (C) 2024-03-30 2024-03-30 Rapid Ekurhuleni (GE) 5 5 4.5 Yes Analysis
26 2024 Tshwane Chess AHS Open Chess Tournament (C2) 2024-02-24 2024-02-24 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 1.5 Yes Analysis
28 2024 Gauteng Inter-Region Chess Championship (U10A) 2024-01-13 2024-01-14 Standard Tshwane (GTP) 5 5 4 Yes Analysis
29 JMC Kick Off Tournament 2024 (D) 2024-01-28 2024-01-28 Standard Johannesburg Metro (GJM) 5 5 2 Yes Analysis
30 2023 Centurion Chess Open (C) 2023-09-23 2023-09-23 Standard Tshwane (GTP) 5 5 2 Yes Analysis
31 JMC Closed Aug 2023 (U10) 2023-08-04 2023-08-06 Standard Johannesburg Metro (GJM) 6 6 4 Yes Analysis
32 Chess Power House 2023 (C) 2023-08-19 2023-08-19 Standard Johannesburg Metro (GJM) 5 4 3 Yes Analysis
33 Bojanala's FIDE in the Sparkling Waters 2023 (Junior) 2023-07-29 2023-07-29 Standard Bojanala Platina (NBR) 6 6 5 Yes Analysis
34 JMC Trinity Little Falls 2023 (U10) 2023-07-02 2023-07-02 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
35 JNW Open - Trinityhouse Little Falls 2023 (U10) 2023-06-24 2023-06-24 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
36 JNW Open - Trinityhouse Little Falls 2023 (U10) 2023-05-13 2023-05-13 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
37 Silver Lakes Open Chess Tournament (C) 2023-04-15 2023-04-15 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
38 2023 South African Junior Closed Chess Championships (U8 Open) 2023-03-31 2023-04-04 Standard Chess South Africa (CSA) 9 9 4.5 Yes Analysis
39 Chris Greyling Open Tournament 2023 (D1) 2023-03-21 2023-03-21 Standard Tshwane (GTP) 5 5 3 Yes Analysis
40 JMC 1 St Peters 2023 (C) 2023-03-18 2023-03-18 Standard Johannesburg Metro (GJM) 5 5 1 Yes Analysis
41 Mzansi Rapid 2023 (Intermediate) 2023-02-04 2023-02-04 Rapid Johannesburg Metro (GJM) 6 6 2 Yes Analysis
42 2023 Tshwane Chess Open Registration Tournament (E) 2023-01-28 2023-01-28 Standard Tshwane (GTP) 5 5 4 Yes Analysis
43 2022 South African Junior Team Chess Championships (U8 Open+Girls) 2022-12-04 2022-12-08 Standard 4 Knights (4K) 7 7 7 Yes Analysis
44 JMC 3rd Trials 2022 (U8) 2022-09-11 2022-09-11 Standard Johannesburg Metro (GJM) 5 5 4 Yes Analysis
45 JMC Womens Day 2022 (U8) 2022-08-06 2022-08-06 Standard Johannesburg Metro (GJM) 5 5 5 Yes Analysis
46 2022 Jacaranda Round Robin (R) 2022-07-30 2022-07-30 Standard Tshwane (GTP) 5 5 2 Yes Analysis
47 JMC Trials 1 - Laerskool Fontainebleau 2022 (U8) 2022-07-24 2022-07-24 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
48 2022 Blou Bul Open (F) 2022-06-25 2022-06-25 Standard Tshwane (GTP) 5 5 3 Yes Analysis
49 World Cadets Rapid Championships 2022 2022-05-01 2022-05-02 Rapid FIDE (FID) 9 9 0 Yes Analysis
50 World Youth Blitz Championships 2022 2022-05-03 2022-05-03 Blitz FIDE (FID) 9 8 0 Yes Analysis
51 2022 Silver Lakes Chess Club Open Chess Tournament (F) 2022-05-14 2022-05-14 Standard Tshwane (GTP) 5 5 3 Yes Analysis
52 2022 Milos Ristic Open Chess Tournament (F) 2022-05-28 2022-05-28 Standard Tshwane (GTP) 5 5 5 Yes Analysis
53 Goforchess Junior Championship 2022 (Grayston) 2022-03-06 2022-03-06 Standard Johannesburg Metro (GJM) 5 5 2 Yes Analysis
54 2022 Tshwane Chess Open Registration Tournament (F) 2022-01-29 2022-01-29 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
55 JMC Bryanston 2021 (E) 2021-11-06 2021-11-06 Standard Johannesburg Metro (GJM) 5 5 2 Yes Analysis
56 JMC Helpmekaar 2021 (U8) 2021-09-06 2021-09-06 Rapid Johannesburg Metro (GJM) 5 5 2 Yes Analysis

Top 3 Streaks

# Games Start End
1 13 Tournament
JMC 3rd Trials 2022
Tournament
2023 Tshwane Chess Open Registration Tournament
date
2022-09-11
rnd
4
type
Standard
result
1
date
2023-01-28
rnd
4
type
Standard
result
1
Opponent
Pelser, A (Aidan)
Opponent
Keyter, A (Alissa)
2 10 Tournament
JMC Helpmekaar 2025
Tournament
Third Knight Riders Junior Open 2025
date
2025-06-01
rnd
2
type
Standard
result
1
date
2025-06-22
rnd
2
type
Standard
result
1
Opponent
King, N (Nicholas)
Opponent
Zulu, T (Thandoluhle)
3 10 Tournament
JMC Helpmekaar Kollege Tournament 2024
Tournament
Chess Power House May Open 2024
date
2024-05-04
rnd
4
type
Standard
result
1
date
2024-05-25
rnd
3
type
Standard
result
1
Opponent
Kilari, S (Suveer)
Opponent
Pillay, Y (Yishai)
# Games Start End
1 13 Tournament
JMC 3rd Trials 2022
Tournament
2023 Tshwane Chess Open Registration Tournament
date
2022-09-11
rnd
4
type
Standard
result
1
date
2023-01-28
rnd
4
type
Standard
result
1
Opponent
Pelser, A (Aidan)
Opponent
Keyter, A (Alissa)
2 10 Tournament
JMC Helpmekaar 2025
Tournament
Third Knight Riders Junior Open 2025
date
2025-06-01
rnd
2
type
Standard
result
1
date
2025-06-22
rnd
2
type
Standard
result
1
Opponent
King, N (Nicholas)
Opponent
Zulu, T (Thandoluhle)
3 10 Tournament
JMC Helpmekaar Kollege Tournament 2024
Tournament
Chess Power House May Open 2024
date
2024-05-04
rnd
4
type
Standard
result
1
date
2024-05-25
rnd
3
type
Standard
result
1
Opponent
Kilari, S (Suveer)
Opponent
Pillay, Y (Yishai)
# Games Start End
1 5 Tournament
CPH St Andrew's Rapid 2024
Tournament
CPH St Andrew's Rapid 2024
date
2024-03-30
rnd
1
type
Rapid
result
1
date
2024-03-30
rnd
5
type
Rapid
result
1
Opponent
Jaffe, E (Ellla)
Opponent
Mann, L (Leane)
2 2 Tournament
Hermanus Chess Club Open 2024
Tournament
Hermanus Chess Club Open 2024
date
2024-04-20
rnd
5
type
Rapid
result
0.5
date
2024-04-20
rnd
6
type
Rapid
result
1
Opponent
Petersen, KC (Kyle)
Opponent
Grimbly, S (St John)
3 2 Tournament
Hermanus Chess Club Open 2024
Tournament
Hermanus Chess Club Open 2024
date
2024-04-20
rnd
2
type
Rapid
result
1
date
2024-04-20
rnd
3
type
Rapid
result
1
Opponent
Oosthuizen, J (Jacques)
Opponent
Malherbe, D (Daniel)
No games found.
# Games Start End
# Games Start End
1 13 Tournament
JMC 3rd Trials 2022
Tournament
2023 Tshwane Chess Open Registration Tournament
date
2022-09-11
rnd
4
type
Standard
result
1
date
2023-01-28
rnd
4
type
Standard
result
1
Opponent
Pelser, A (Aidan)
Opponent
Keyter, A (Alissa)
2 10 Tournament
JMC Helpmekaar Kollege Tournament 2024
Tournament
Chess Power House May Open 2024
date
2024-05-04
rnd
4
type
Standard
result
1
date
2024-05-25
rnd
3
type
Standard
result
1
Opponent
Kilari, S (Suveer)
Opponent
Pillay, Y (Yishai)
3 9 Tournament
2022 Jacaranda Round Robin
Tournament
JMC 3rd Trials 2022
date
2022-07-30
rnd
4
type
Standard
result
1
date
2022-09-11
rnd
2
type
Standard
result
1
Opponent
Retief, M (Michael)
Opponent
Steyn, M (Mari-Louise)
# Games Start End
1 13 Tournament
JMC 3rd Trials 2022
Tournament
2023 Tshwane Chess Open Registration Tournament
date
2022-09-11
rnd
4
type
Standard
result
1
date
2023-01-28
rnd
4
type
Standard
result
1
Opponent
Pelser, A (Aidan)
Opponent
Keyter, A (Alissa)
2 10 Tournament
JMC Helpmekaar Kollege Tournament 2024
Tournament
Chess Power House May Open 2024
date
2024-05-04
rnd
4
type
Standard
result
1
date
2024-05-25
rnd
3
type
Standard
result
1
Opponent
Kilari, S (Suveer)
Opponent
Pillay, Y (Yishai)
3 9 Tournament
2022 Jacaranda Round Robin
Tournament
JMC 3rd Trials 2022
date
2022-07-30
rnd
4
type
Standard
result
1
date
2022-09-11
rnd
2
type
Standard
result
1
Opponent
Retief, M (Michael)
Opponent
Steyn, M (Mari-Louise)
# Games Start End
1 2 Tournament
Hermanus Chess Club Open 2024
Tournament
Hermanus Chess Club Open 2024
date
2024-04-20
rnd
2
type
Rapid
result
1
date
2024-04-20
rnd
3
type
Rapid
result
1
Opponent
Oosthuizen, J (Jacques)
Opponent
Malherbe, D (Daniel)
2 2 Tournament
CPH St Andrew's Rapid 2024
Tournament
CPH St Andrew's Rapid 2024
date
2024-03-30
rnd
4
type
Rapid
result
1
date
2024-03-30
rnd
5
type
Rapid
result
1
Opponent
Zhu, R (Ryan Yuancheng)
Opponent
Mann, L (Leane)
3 2 Tournament
CPH St Andrew's Rapid 2024
Tournament
CPH St Andrew's Rapid 2024
date
2024-03-30
rnd
1
type
Rapid
result
1
date
2024-03-30
rnd
2
type
Rapid
result
1
Opponent
Jaffe, E (Ellla)
Opponent
Wong, K (Kayla)
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 Pillay ,Y (Yishai) 7 4 60.7 7 4 60.7 0 0 0 0 0 0
1352 1412.7 1338.6 1412.7 0 0 0 0
2 Stelloh ,S (Sebastian) 7 3 -60.7 7 3 -60.7 0 0 0 0 0 0
1435 1374.3 1422.3 1374.3 0 0 0 0
3 Conradie ,M (Minka) 6 4.5 212.5 6 4.5 212.5 0 0 0 0 0 0
1312.8 1525.3 1305.5 1525.3 0 0 0 0
4 Le Kay ,A (Alexa) 5 4 255 5 4 255 0 0 0 0 0 0
1126 1381 1070.4 1381 0 0 0 0
5 Ma ,M (Matthew) 4 1.5 -106.2 3 1.5 0 1 0 -425 0 0 0
1379.5 1273.3 1384.3 1379.5 1200 954.5 0 0
6 Prinsloo ,N (Nicholas) 3 0 -425 3 0 -425 0 0 0 0 0 0
1380.9 955.9 1366.6 955.9 0 0 0 0
7 Kwint ,J (Jack) 3 3 425 3 3 425 0 0 0 0 0 0
1202.6 1627.6 1201.2 1627.6 0 0 0 0
8 Ravuri ,C (Chinmay Vihaan) 3 0 -425 3 0 -425 0 0 0 0 0 0
1389.5 964.5 1388.8 964.5 0 0 0 0
9 Motau ,N (Neelo) 3 0.5 -283.3 3 0.5 -283.3 0 0 0 0 0 0
1369.4 1086.1 1373.9 1086.1 0 0 0 0
10 Deysel ,Z (Zachariah) 3 2 141.7 2 2 425 1 0 -425 0 0 0
1025.1 1166.7 953.4 1450.1 1200 600.1 0 0

Norms

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