Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oosthuizen, S (Stefan)

Chess SA id

1100321846

FIDE id

Date of birth

2010-05-20 (U16)

Gender

Male

Region

Sarah Baartman (ESB)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1328.4	1291.8	1274.1	1200
Raw rating	1328.4	1291.8	1274.1	1200
Weighted rating	1217.8	1207.3	1217.1	1200
Weighted performance	0	0	0	0
Floor	828.4	791.8	774.1	700
K-factor	36	36	36	36
Min/Max rating change allowed	138.1	145.5	149.2	165.8
Highest rating	1328.4 2025-09-30	1291.8 2025-09-30	1274.1 2025-08-01	1200 2025-06-01
Highest raw rating	1328.4 2025-09-30	1291.8 2025-09-30	1274.1 2025-08-01	1200 2025-06-01
Highest weighted rating	1217.8 2025-09-30	1207.3 2025-09-30	1205.9 2025-08-01	1200 2025-06-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1328.4	1291.8	1274.1	1200
Analysis
Rating	1328.4	1291.8	1274.1	1200
Raw rating	1328.4	1291.8	1274.1	1200
Weighted rating	1217.8	1207.3	1217.1
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	828.4	791.8	774.1	700
Max/Min rating change allowed	138.1	145.5	149.2	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	1328.4	1291.8	1274.1	1200
New weighted rating	1227.3	1214.4	1222.2	1200
New weighted performance	0	0	0	0
Temp new rating	1328.4	1291.8	1274.1	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1328.4	1291.8	1274.1	1200
New K-factor	36	36	36	36
New floor	828.4	791.8	774.1	700

Item	Main	Standard	Rapid
	0	0	0
	10	5	5
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	10	5	5

Games since
	Main 10	Standard 5		Rapid 5		Blitz 0
Gender	Male
Age group	U16
Region	Sarah Baartman (ESB)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	10	8	80	255	1363.3	1618.3
Standard	5	3.5	70	170	1466	1636
Rapid	5	4.5	90	340	1260.6	1600.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	10	8	80	255	1363.3	1618.3
Standard	5	3.5	70	170	1466	1636
Rapid	5	4.5	90	340	1260.6	1600.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1328.4	1291.8	1274.1	1200
2025-09-01	1250.3	1200	1274.1	1200
2025-08-01	1250.3	1200	1274.1	1200
2025-07-01	1200	1200	1200	1200
2025-06-01	1200	1200	1200	1200
2025-05-01	1200	1200	1200	1200
2025-04-01	1200	1200	1200	1200
2025-03-01	1200	1200	1200	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200
2023-11-01	1200	1200	1200	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	EC Closed 2025 (U16 Open)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	5	3.5	Yes	Analysis
2	Port Alfred Chess Tournament 2025 (B)	2025-06-21	2025-06-21	Rapid	Sarah Baartman (ESB)	5	5	4.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	EC Closed 2025 (U16 Open)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	5	3.5	Yes	Analysis
2	Port Alfred Chess Tournament 2025 (B)	2025-06-21	2025-06-21	Rapid	Sarah Baartman (ESB)	5	5	4.5	Yes	Analysis

#	Games	Start				End
1	9	Tournament Port Alfred Chess Tournament 2025				Tournament EC Closed 2025
		date 2025-06-21	rnd 1	type Rapid	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Rukwata, C (Ciarah)				Opponent Brown, N (Nathan)

#	Games	Start				End
1	4	Tournament EC Closed 2025				Tournament EC Closed 2025
		date 2025-09-06	rnd 2	type Standard	result 0.5	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Sonti, K (Kamvalethu)				Opponent Brown, N (Nathan)

#	Games	Start				End
1	5	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 1	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Rukwata, C (Ciarah)				Opponent Wisani, S (Sivenathi)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament EC Closed 2025				Tournament EC Closed 2025
		date 2025-09-06	rnd 3	type Standard	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Hall, J (Joshua)				Opponent Brown, N (Nathan)
2	3	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 1	type Rapid	result 1	date 2025-06-21	rnd 3	type Rapid	result 1
		Opponent Rukwata, C (Ciarah)				Opponent Nomna, S (Sinelizwe)
3	1	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 5	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Wisani, S (Sivenathi)				Opponent Wisani, S (Sivenathi)

#	Games	Start				End
1	3	Tournament EC Closed 2025				Tournament EC Closed 2025
		date 2025-09-06	rnd 3	type Standard	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Hall, J (Joshua)				Opponent Brown, N (Nathan)

#	Games	Start				End
1	3	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 1	type Rapid	result 1	date 2025-06-21	rnd 3	type Rapid	result 1
		Opponent Rukwata, C (Ciarah)				Opponent Nomna, S (Sinelizwe)
2	1	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 5	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Wisani, S (Sivenathi)				Opponent Wisani, S (Sivenathi)

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	Toko ,K (Kungawo)	1	1	425	1	1	425	0	0	0	0	0	0
1	Toko ,K (Kungawo)	1	1469.8	1894.8	1	1457	1894.8	0	0	0	0	0	0
2	Brown ,N (Nathan)	1	1	425	1	1	425	0	0	0	0	0	0
2	Brown ,N (Nathan)	1	1556.8	1981.8	1	1550.6	1981.8	0	0	0	0	0	0
3	Hall ,J (Joshua)	1	1	425	1	1	425	0	0	0	0	0	0
3	Hall ,J (Joshua)	1	1364	1789	1	1354.4	1789	0	0	0	0	0	0
4	Sonti ,K (Kamvalethu)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
4	Sonti ,K (Kamvalethu)	1	1402.3	1402.3	1	1402	1402.3	0	0	0	0	0	0
5	Ackerdien ,S (Saud)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Ackerdien ,S (Saud)	1	1537.1	1112.1	1	1532.2	1112.1	0	0	0	0	0	0
6	Wisani ,S (Sivenathi)	1	1	425	0	0	0	1	1	425	0	0	0
6	Wisani ,S (Sivenathi)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
7	Nomna ,S (Sinelizwe)	1	1	425	0	0	0	1	1	425	0	0	0
7	Nomna ,S (Sinelizwe)	1	1224.2	1649.2	0	0	0	1	1200	1649.2	0	0	0
8	Ntlonti ,L (Lunathi)	1	1	425	0	0	0	1	1	425	0	0	0
8	Ntlonti ,L (Lunathi)	1	1255.9	1680.9	0	0	0	1	1200	1680.9	0	0	0
9	Rukwata ,C (Ciarah)	1	1	425	0	0	0	1	1	425	0	0	0
9	Rukwata ,C (Ciarah)	1	1199.1	1624.1	0	0	0	1	1200	1624.1	0	0	0
10	Bain ,C (Caden)	1	0.5	0	0	0	0	1	0.5	0	0	0	0
10	Bain ,C (Caden)	1	1423.6	1423.6	0	0	0	1	1287.1	1423.6	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

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PLAYER PAGE

Personal

Oosthuizen, S (Stefan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms