Chess South Africa Ratings Database

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Personal

Nortje, O (Owen)

Chess SA id

1140153987

FIDE id

Date of birth

2014-01-08 (U12)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

17.6

Junior GPX Points

1060.6

Item	Main	Standard	Rapid	Blitz
Rating	1229.4	1194.4	1351.9	1200
Raw rating	1206.3	1128.9	1351.9	1200
Weighted rating	1229.4	1194.4	1287.8	1200
Weighted performance	1107.7	1034.8	1265.6	0
Floor	742.2	709.7	851.9	700
K-factor	36	36	36	36
Min/Max rating change allowed	164.3	183.5	133.5	165.8
Highest rating	1246.7 2023-08-01	1244.1 2023-08-01	1351.9 2025-09-01	1200 2018-10-01
Highest raw rating	1242.2 2025-09-01	1209.7 2024-08-01	1351.9 2025-09-01	1200 2024-02-01
Highest weighted rating	1230.8 2025-09-01	1209.7 2018-10-01	1281.3 2025-09-01	1200 2018-10-01
Highest weighted performance	1246.7 2023-08-01	1244.1 2023-08-01	1326.1 2024-03-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-1.4	-5.1	0	0
New rating	1228.1	1189.3	1351.9	1200
Analysis
Rating	1229.4	1194.4	1351.9	1200
Raw rating	1206.3	1128.9	1351.9	1200
Weighted rating	1229.4	1194.4	1287.8
Weighted performance	1107.7	1034.8	1265.6
K-factor	36	36	36	36
Floor	742.2	709.7	851.9	700
Max/Min rating change allowed	164.3	183.5	133.5	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	1206.3	1128.9	1351.9	1200
New weighted rating	1228.1	1189.3	1293.9	1200
New weighted performance	1107.3	1034.4	1265.1	0
Temp new rating	1228.1	1189.3	1351.9	1200
Temp new rating +/-	-1.4	-5.1	0	0
Final new rating +/-	-1.4	-5.1	0	0
New rating	1228.1	1189.3	1351.9	1200
New K-factor	36	36	36	36
New floor	742.2	709.7	851.9	700

Item	Main	Standard	Rapid
	0	0	0
	23	13	10
	25	20	5
	30	20	10
	0	0	0
	0	0	0
History	78	53	25

Games since
	Main 58	Standard 43		Rapid 15		Blitz 0
Gender	Male
Age group	U12
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	3808		1242		204
Male	2893		953		151
U12	623		201		35
U12 Male	428		143		26
Standard
	RSA		Province		Region
Overall	3986		1390		192
Male	2984		1060		148
U12	654		228		32
U12 Male	449		160		23
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
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	23	10.5	45.65	-37	1256.7	1219.7
Standard	13	3	23.08	-228.8	1290	1061.1
Rapid	10	7.5	75	212.5	1213.3	1425.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	78	39	50	0	1234.7	1234.7
Standard	53	21.5	40.57	-80.2	1247	1166.8
Rapid	25	17.5	70	170	1208.7	1378.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1206.3	1128.9	1351.9	1200
2025-09-01	1242.2	1157	1351.9	1200
2025-08-01	1234.2	1209.7	1274.2	1200
2025-07-01	1234.2	1209.7	1272.8	1200
2025-06-01	1234.6	1209.7	1279.9	1200
2025-05-01	1234.6	1209.7	1279.9	1200
2025-04-01	1234.6	1209.7	1279.9	1200
2025-03-01	1234.6	1209.7	1279.9	1200
2025-02-01	1234.6	1209.7	1279.9	1200
2025-01-01	1234.6	1209.7	1279.9	1200
2024-12-01	1234.6	1209.7	1279.9	1200
2024-11-01	1234.6	1209.7	1279.9	1200
2024-10-01	1234.6	1209.7	1279.9	1200
2024-09-01	1234.6	1209.7	1279.9	1200
2024-08-01	1234.6	1209.7	1279.9	1200
2024-07-01	1214	1178.7	1279.9	1200
2024-06-01	1215.8	1170.8	1279.9	1200
2024-08-01	1215.8	1170.8	1279.9	1200
2024-04-01	1231.6	1182.3	1279.9	1200
2024-03-01	1198.3	1182.3	1230.6	1200
2024-02-01	1198.3	1182.3	1230.6	1200
2024-01-01	1198.3	1182.3	1230.6	1200
2023-12-01	1198.3	1182.3	1230.6	1200
2023-11-01	1198.3	1182.3	1230.6	1200

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	East Rand Chess Club Open 2025 (C)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
2	East Rand Chess Club Open 2025 (C)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
3	Chess Power House Aug Open 2025 (C)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
4	Benoni Primary School Cluster Teams 2025 (U11B)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis
5	Chess Power House Youth Day Rapid 2025 (C)	2025-06-16	2025-06-16	Rapid	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	East Rand Chess Club Open 2025 (C)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
2	East Rand Chess Club Open 2025 (C)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
3	Chess Power House Aug Open 2025 (C)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
4	Benoni Primary School Cluster Teams 2025 (U11B)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis
5	Chess Power House Youth Day Rapid 2025 (C)	2025-06-16	2025-06-16	Rapid	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
6	Ekurhuleni Trails 2 2024 (U12)	2024-07-27	2024-07-27	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
7	EN Chess Club Winter Open 2024 (D)	2024-06-29	2024-06-29	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	Ekurhuleni North Primary Schools District Individual Finals 2024 (U11 Boys)	2024-05-11	2024-05-11	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
9	Westwood Open 2024 (C)	2024-04-13	2024-04-13	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
10	Benoni Primary School Cluster Individuals 2024 (U11 Boys)	2024-03-09	2024-03-09	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
11	2023 Gauteng Noord (E)	2023-10-14	2023-10-14	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
12	2023 Tuks Open Chess Tournament (E+F)	2023-10-07	2023-10-07	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
13	Chess Molecules Rapid 2023 (Grade 3+4)	2023-09-23	2023-09-23	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis
14	Chess Power House 2023 (C)	2023-08-19	2023-08-19	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
15	Chess Molecules 16 June Tournament 2023 (Grade 3+4)	2023-06-16	2023-06-16	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis
16	Alberton Chess Club Tournament 1 2023 (D)	2023-04-15	2023-04-15	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

#	Games	Start				End
1	7	Tournament Chess Power House Youth Day Rapid 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-06-16	rnd 4	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Saloner, K (Kobi)				Opponent Voogt, J (Jaak)
2	5	Tournament Ekurhuleni North Primary Schools District Individual Finals 2024				Tournament EN Chess Club Winter Open 2024
		date 2024-05-11	rnd 3	type Standard	result 1	date 2024-06-29	rnd 2	type Standard	result 1
		Opponent Mdletshe, M (Malibongwe)				Opponent Venter, L (Luan)
3	4	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Westwood Open 2024
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Van Jaarsveld, J (Jayden)				Opponent Mendonca, N (Nelita)

#	Games	Start				End
1	5	Tournament Ekurhuleni North Primary Schools District Individual Finals 2024				Tournament EN Chess Club Winter Open 2024
		date 2024-05-11	rnd 3	type Standard	result 1	date 2024-06-29	rnd 2	type Standard	result 1
		Opponent Mdletshe, M (Malibongwe)				Opponent Venter, L (Luan)
2	2	Tournament Ekurhuleni Trails 2 2024				Tournament Ekurhuleni Trails 2 2024
		date 2024-07-27	rnd 2	type Standard	result 1	date 2024-07-27	rnd 3	type Standard	result 1
		Opponent Collins, J (Jaytem)				Opponent Pheto, M (Mashamate)
3	2	Tournament 2023 Gauteng Noord				Tournament 2023 Gauteng Noord
		date 2023-10-14	rnd 2	type Standard	result 1	date 2023-10-14	rnd 3	type Standard	result 1
		Opponent Marais, L (Leja)				Opponent Westermann, I (Inge)

#	Games	Start				End
1	7	Tournament Chess Power House Youth Day Rapid 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-06-16	rnd 4	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Saloner, K (Kobi)				Opponent Voogt, J (Jaak)
2	4	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Chess Power House Youth Day Rapid 2025
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2025-06-16	rnd 1	type Rapid	result 1
		Opponent Van Jaarsveld, J (Jayden)				Opponent Ngqweqwe, S (Sanele)
3	2	Tournament Chess Molecules Rapid 2023				Tournament Chess Molecules Rapid 2023
		date 2023-09-23	rnd 3	type Rapid	result 1	date 2023-09-23	rnd 4	type Rapid	result 1
		Opponent Igwe, M (Maryann)				Opponent Mbele, A (Amahle)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Coetzee, O (Oliver)				Opponent Voogt, J (Jaak)
2	4	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Westwood Open 2024
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Van Jaarsveld, J (Jayden)				Opponent Mendonca, N (Nelita)
3	2	Tournament Ekurhuleni Trails 2 2024				Tournament Ekurhuleni Trails 2 2024
		date 2024-07-27	rnd 2	type Standard	result 1	date 2024-07-27	rnd 3	type Standard	result 1
		Opponent Collins, J (Jaytem)				Opponent Pheto, M (Mashamate)

#	Games	Start				End
1	2	Tournament Ekurhuleni Trails 2 2024				Tournament Ekurhuleni Trails 2 2024
		date 2024-07-27	rnd 2	type Standard	result 1	date 2024-07-27	rnd 3	type Standard	result 1
		Opponent Collins, J (Jaytem)				Opponent Pheto, M (Mashamate)
2	2	Tournament EN Chess Club Winter Open 2024				Tournament EN Chess Club Winter Open 2024
		date 2024-06-29	rnd 1	type Standard	result 1	date 2024-06-29	rnd 2	type Standard	result 1
		Opponent Managa, K (Khuliso)				Opponent Venter, L (Luan)
3	2	Tournament Ekurhuleni North Primary Schools District Individual Finals 2024				Tournament Ekurhuleni North Primary Schools District Individual Finals 2024
		date 2024-05-11	rnd 3	type Standard	result 1	date 2024-05-11	rnd 4	type Standard	result 1
		Opponent Mdletshe, M (Malibongwe)				Opponent Mabunda, S (Sibusiso)

#	Games	Start				End
1	5	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Coetzee, O (Oliver)				Opponent Voogt, J (Jaak)
2	4	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Chess Power House Youth Day Rapid 2025
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2025-06-16	rnd 1	type Rapid	result 1
		Opponent Van Jaarsveld, J (Jayden)				Opponent Ngqweqwe, S (Sanele)
3	2	Tournament Chess Molecules Rapid 2023				Tournament Chess Molecules Rapid 2023
		date 2023-09-23	rnd 3	type Rapid	result 1	date 2023-09-23	rnd 4	type Rapid	result 1
		Opponent Igwe, M (Maryann)				Opponent Mbele, A (Amahle)

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
		Gms	Aor	Prat	Gms	Aor	Prat	Gms	Aor	Prat	Gms	Aor	Prat
1	Matamela ,M (Mukovhe)	2	2	425	2	2	425	0	0	0	0	0	0
1	Matamela ,M (Mukovhe)	2	1139.5	1564.5	2	1184.4	1564.5	0	0	0	0	0	0
2	De Jager ,Z (Zander)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	De Jager ,Z (Zander)	2	1522.4	1097.4	2	1505.6	1097.4	0	0	0	0	0	0
3	Pillay ,J (Joshua)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Pillay ,J (Joshua)	2	1408.8	983.8	2	1368.8	983.8	0	0	0	0	0	0
4	Karsas ,S (Sophia)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Karsas ,S (Sophia)	2	1239.1	814.1	2	1269.2	814.1	0	0	0	0	0	0
5	Dixon ,G (Genevieve)	2	1	0	2	1	0	0	0	0	0	0	0
5	Dixon ,G (Genevieve)	2	1034.7	1034.7	2	1020.2	1034.7	0	0	0	0	0	0
6	Nortje ,W (Wesley)	2	2	425	1	1	425	1	1	425	0	0	0
6	Nortje ,W (Wesley)	2	1192.9	1617.9	1	1200	1617.9	1	1200	1617.9	0	0	0
7	Visagie ,A (Arina)	2	0	-425	1	0	-425	1	0	-425	0	0	0
7	Visagie ,A (Arina)	2	1395.1	970.1	1	1268.8	970.1	1	1453.4	970.1	0	0	0
8	Westermann ,I (Inge)	1	1	425	1	1	425	0	0	0	0	0	0
8	Westermann ,I (Inge)	1	1168	1593	1	1170.9	1593	0	0	0	0	0	0
9	Caraphina ,J (Joao)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Caraphina ,J (Joao)	1	1228.6	803.6	1	1232.8	803.6	0	0	0	0	0	0
10	Mdletshe ,M (Malibongwe)	1	1	425	1	1	425	0	0	0	0	0	0
10	Mdletshe ,M (Malibongwe)	1	1200	1625	1	1200	1625	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Nortje, O (Owen)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms