Player Page

Joubert, J (Joshua)
Dob: 2015/09/16 (U10)
Gender: Male
Chess SA id: 1150134895
FIDE id:
Region: Johannesburg Metro (GJM)
Citizen: RSA
Title(s):
Last active: 2024/12/08 (2 days ago)
Ratings
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1504.2
Current Weighted rating1461.5
Current Weighted performance1406.5
Current official/published rating (highest between Raw, WR and WP)1504.2
Current highest rating achieved1542.9
Current floor (min rating allowed)1042.9
Current K-factor32
Games played this month5
Score (S)4.0
Expected score (We)2.77
Difference (S-We)1.16
Current Raw change (no limits, including tournament time weight)37.0
Current min/max change allowed (with limits)±107.5
Current Raw change used (final)37.0
Projected new Raw rating1541.2
Projected new Weighed rating1346.7
Projected new Weighted performance1505.2
Projected new final Raw rating (if new WP > new Raw)1541.2
Projected new highest rating1542.9
Projected new floor1042.9
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1541.2
Projected effective change (new Official - current Official)+37.0
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1491.9
Current Weighted rating1449.5
Current Weighted performance1406.5
Current official/published rating (highest between Raw, WR and WP)1491.9
Current highest rating achieved1539.0
Current floor (min rating allowed)1039.0
Current K-factor32
Games played this month5
Score (S)4.0
Expected score (We)2.85
Difference (S-We)1.15
Current Raw change (no limits, including tournament time weight)36.8
Current min/max change allowed (with limits)±109.4
Current Raw change used (final)36.8
Projected new Raw rating1528.7
Projected new Weighed rating1335.5
Projected new Weighted performance1505.2
Projected new final Raw rating (if new WP > new Raw)1528.7
Projected new highest rating1539.0
Projected new floor1039.0
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1528.7
Projected effective change (new Official - current Official)+36.8
s
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1148.6
Current Weighted rating1090.4
Current Weighted performance1053.1
Current official/published rating (highest between Raw, WR and WP)1148.6
Current highest rating achieved1178.4
Current floor (min rating allowed)678.4
Current K-factor40
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±178.4
Current Raw change used (final)0.0
Projected new Raw rating1148.6
Projected new Weighed rating1005.7
Projected new Weighted performance1053.1
Projected new final Raw rating (if new WP > new Raw)1148.6
Projected new highest rating1178.4
Projected new floor678.4
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1148.6
Projected effective change (new Official - current Official)=0.0
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1034.2
Current Weighted rating1034.2
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1034.2
Current highest rating achieved1034.2
Current floor (min rating allowed)534.2
Current K-factor40
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±210.0
Current Raw change used (final)0.0
Projected new Raw rating1034.2
Projected new Weighed rating951.5
Projected new Weighted performance127.4
Projected new final Raw rating (if new WP > new Raw)1034.2
Projected new highest rating1034.2
Projected new floor534.2
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1034.2
Projected effective change (new Official - current Official)=0.0
Tournaments
Tournament: Gauteng Inter-Region at UJ 2024 (U10 Open)
Start: 2024/12/07  End: 2024/12/08  Host: GJM  Type: Standard   Time: 90  Time weight: 0.94  Rounds: 5
Games: 5  Score: 4.0
Main rating: 1504.2  Rating gain/loss: 37.0
Type rating: 1491.9  Rating gain/loss: 36.8
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
17 Gauteng Inter-Region at UJ 2024 (U10 Open) 2024/12/07 2024/12/08 Johannesburg Metro (GJM) Standard 90 0.94 5 5 4.0 1504.2 1491.9 Analysis
16 2024 Tshwane Chess Club Clash (Open) 2024/10/12 2024/10/12 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1537.9 1531.6 Analysis
15 Gauteng Top Schools 2024 (U11 Open) 2024/10/04 2024/10/04 Ekurhuleni (GE) Standard 60 0.83 5 5 4.0 1537.9 1531.6 Analysis
14 Bojanala's FIDE In The Sparkling Waters 2024 (Junior Champs) 2024/08/17 2024/08/17 Bojanala Platina (NBR) Standard 120 1.00 5 5 3.5 1542.9 1539.0 Analysis
13 JMC Closed 2024 (U10) 2024/08/09 2024/08/09 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1542.9 1539.0 Analysis
12 Second Knight Riders Juniors Open Chess Tournament 2024 (U10) 2024/06/08 2024/06/08 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1494.6 1501.7 Analysis
11 JMC Trinityhouse Little Falls 2024 (U10) 2024/06/02 2024/06/02 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.5 1494.6 1501.7 Analysis
10 Chess Power House May Open 2024 (D) 2024/05/25 2024/05/25 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1352.8 1320.7 Analysis
9 JMC Crawford International Sandton 2024 (U10) 2024/05/11 2024/05/11 Johannesburg Metro (GJM) Standard 60 0.83 5 5 5.0 1352.8 1320.7 Analysis
8 JMC Helpmekaar Kollege Tournament 2024 (U10) 2024/05/04 2024/05/04 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1352.8 1320.7 Analysis
7 South African Junior Closed Chess Championship 2024 (U10 Open) 2024/04/27 2024/05/01 Ekurhuleni (GE) Standard 120 1.00 9 8 2.0 1352.8 1320.7 Analysis
6 Hermanus Chess Club Open 2024 (Intermediate) 2024/04/20 2024/04/20 Overberg (WOS) Rapid 20 0.47 7 7 3.5 1374.0 1142.2 Analysis
5 CPH St Andrew's Rapid 2024 (C) 2024/03/30 2024/03/30 Ekurhuleni (GE) Rapid 20 0.47 5 5 4.5 1342.3 1003.8 Analysis
4 2024 Tshwane Chess AHS Open Chess Tournament (C2) 2024/02/24 2024/02/24 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1408.2 1394.3 Analysis
3 2024 Blou Bul Open Chess Tournament (C) 2024/02/10 2024/02/10 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1408.2 1394.3 Analysis
2 JMC Kick Off Tournament 2024 (D) 2024/01/28 2024/01/28 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1435.1 1423.4 Analysis
1 2024 Gauteng Inter-Region Chess Championship (U10A) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 4.0 1435.1 1423.4 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
44 Gauteng Inter-Region at UJ 2024 (U10 Open) 2024/12/07 2024/12/08 Johannesburg Metro (GJM) Standard 90 0.94 5 5 4.0 1504.2 1491.9 Analysis
43 2024 Tshwane Chess Club Clash (Open) 2024/10/12 2024/10/12 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1537.9 1531.6 Analysis
42 Gauteng Top Schools 2024 (U11 Open) 2024/10/04 2024/10/04 Ekurhuleni (GE) Standard 60 0.83 5 5 4.0 1537.9 1531.6 Analysis
41 Bojanala's FIDE In The Sparkling Waters 2024 (Junior Champs) 2024/08/17 2024/08/17 Bojanala Platina (NBR) Standard 120 1.00 5 5 3.5 1542.9 1539.0 Analysis
40 JMC Closed 2024 (U10) 2024/08/09 2024/08/09 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1542.9 1539.0 Analysis
39 Second Knight Riders Juniors Open Chess Tournament 2024 (U10) 2024/06/08 2024/06/08 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1494.6 1501.7 Analysis
38 JMC Trinityhouse Little Falls 2024 (U10) 2024/06/02 2024/06/02 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.5 1494.6 1501.7 Analysis
37 Chess Power House May Open 2024 (D) 2024/05/25 2024/05/25 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1352.8 1320.7 Analysis
36 JMC Crawford International Sandton 2024 (U10) 2024/05/11 2024/05/11 Johannesburg Metro (GJM) Standard 60 0.83 5 5 5.0 1352.8 1320.7 Analysis
35 JMC Helpmekaar Kollege Tournament 2024 (U10) 2024/05/04 2024/05/04 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1352.8 1320.7 Analysis
34 South African Junior Closed Chess Championship 2024 (U10 Open) 2024/04/27 2024/05/01 Ekurhuleni (GE) Standard 120 1.00 9 8 2.0 1352.8 1320.7 Analysis
33 Hermanus Chess Club Open 2024 (Intermediate) 2024/04/20 2024/04/20 Overberg (WOS) Rapid 20 0.47 7 7 3.5 1374.0 1142.2 Analysis
32 CPH St Andrew's Rapid 2024 (C) 2024/03/30 2024/03/30 Ekurhuleni (GE) Rapid 20 0.47 5 5 4.5 1342.3 1003.8 Analysis
31 2024 Tshwane Chess AHS Open Chess Tournament (C2) 2024/02/24 2024/02/24 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1408.2 1394.3 Analysis
30 2024 Blou Bul Open Chess Tournament (C) 2024/02/10 2024/02/10 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1408.2 1394.3 Analysis
29 JMC Kick Off Tournament 2024 (D) 2024/01/28 2024/01/28 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1435.1 1423.4 Analysis
28 2024 Gauteng Inter-Region Chess Championship (U10A) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 4.0 1435.1 1423.4 Analysis
27 2023 Centurion Chess Open (C) 2023/09/23 2023/09/23 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1481.6 1478.8 Analysis
26 Chess Power House 2023 (C) 2023/08/19 2023/08/19 Johannesburg Metro (GJM) Standard 90 0.94 5 4 3.0 1477.7 1469.8 Analysis
25 JMC Closed Aug 2023 (U10) 2023/08/04 2023/08/06 Johannesburg Metro (GJM) Standard 90 0.94 6 6 4.0 1477.7 1469.8 Analysis
123
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 90 55 5 30 57.5 63.9 118.1 1323.2 1441.3
White 44 28 3 13 29.5 67.0 144.9 1303.6 1448.4
Black 46 27 2 17 28.0 60.9 92.4 1342.0 1434.4
Standard All 78 48 3 27 49.5 63.5 114.4 1331.7 1446.2
White 38 24 2 12 25.0 65.8 134.2 1309.1 1443.3
Black 40 24 1 15 24.5 61.3 95.6 1353.3 1448.9
Rapid All 12 7 2 3 8.0 66.7 141.7 1267.7 1409.4
White 6 4 1 1 4.5 75.0 212.5 1268.6 1481.1
Black 6 3 1 2 3.5 58.3 70.8 1266.9 1337.7
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 240 137 10 93 142.0 59.2 77.9 1241.5 1319.5
White 119 70 6 43 73.0 61.3 96.4 1228.8 1325.2
Black 121 67 4 50 69.0 57.0 59.7 1254.1 1313.8
Standard All 200 126 8 66 130.0 65.0 127.5 1261.6 1389.1
White 99 63 5 31 65.5 66.2 137.4 1251.4 1388.8
Black 101 63 3 35 64.5 63.9 117.8 1271.7 1389.5
Rapid All 32 11 2 19 12.0 37.5 -106.3 1178.3 1072.0
White 16 7 1 8 7.5 46.9 -26.6 1158.5 1131.9
Black 16 4 1 11 4.5 28.1 -185.9 1198.1 1012.2
Blitz All 8 0 0 8 0.0 0.0 -425.0 992.1 567.1
White 4 0 0 4 0.0 0.0 -425.0 950.0 525.0
Black 4 0 0 4 0.0 0.0 -425.0 1034.3 609.3
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 2160134894 Conradie, M (Minka) 6 4.5 4 1 1 75.0 1278.4 212.5 1490.9 View list
2 1150145631 Stelloh, S (Sebastian) 6 2.0 2 0 4 33.3 1380.4 -141.7 1238.8 View list
3 2150135551 Le Kay, A (Alexa) 4 3.0 3 0 1 75.0 1271.9 212.5 1484.4 View list
4 1150134901 Pillay, Y (Yishai) 4 2.0 2 0 2 50.0 1314.0 0.0 1314.0 View list
5 1140138260 Ma, M (Matthew) 4 1.5 1 1 2 37.5 1397.6 -106.3 1291.4 View list
6 1150143812 Kwint, J (Jack) 3 3.0 3 0 0 100.0 1332.8 425.0 1757.8 View list
7 1170134515 Deysel, Z (Zachariah) 3 2.0 2 0 1 66.7 1215.9 141.7 1357.5 View list
8 1140144042 Motau, N (Neelo) 3 0.5 0 1 2 16.7 1360.9 -283.3 1077.6 View list
9 2140155741 Akole, S (Sara) 2 2.0 2 0 0 100.0 1379.5 425.0 1804.5 View list
10 1160137420 Badat, M (Mikaeel) 2 2.0 2 0 0 100.0 1234.4 425.0 1659.4 View list
11 1150136649 Coetzee, A (Adriaan) 2 2.0 2 0 0 100.0 1138.1 425.0 1563.1 View list
12 1150141656 Du Toit, C (Carel Aaron) 2 2.0 2 0 0 100.0 1243.1 425.0 1668.1 View list
13 1160144300 Hoek, B (Beyers) 2 2.0 2 0 0 100.0 1286.7 425.0 1711.7 View list
14 1150303045 Kilari, S (Suveer) 2 2.0 2 0 0 100.0 1447.8 425.0 1872.8 View list
15 1160134896 Loots, A (Albert) 2 2.0 2 0 0 100.0 1336.9 425.0 1761.9 View list
16 2140158313 Mann, L (Leane) 2 2.0 2 0 0 100.0 1410.0 425.0 1835.0 View list
17 1160191601 Meijer, C (Carlo) 2 2.0 2 0 0 100.0 1447.8 425.0 1872.8 View list
18 1150134898 Nagel, R (Raf) 2 2.0 2 0 0 100.0 1192.1 425.0 1617.1 View list
19 2150134902 Steyn, M (Mari-Louise) 2 2.0 2 0 0 100.0 1286.7 425.0 1711.7 View list
20 2150156385 Vis, K (Katlego) 2 2.0 2 0 0 100.0 1469.7 425.0 1894.7 View list