Chess South Africa Ratings Database

PLAYER PAGE

Personal

van der Merwe, S (Stefan)

Chess SA id

1120316252

FIDE id

Date of birth

2012-04-28 (U14)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-18

Personal details last changed

1900-01-01

Junior GPX Games

15.5

Junior GPX Points

1323.9

Item	Main	Standard	Rapid	Blitz
Rating	1304	1289.7	1260.7	1200
Raw rating	1304	1289.7	1260.7	1200
Weighted rating	1216.7	1211.2	1214	1200
Weighted performance	0	0	0	0
Floor	804	789.7	760.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	143	145.9	152.1	165.8
Highest rating	1304 2025-11-01	1289.7 2025-11-01	1260.7 2025-09-01	1200 2025-03-01
Highest raw rating	1304 2025-11-01	1289.7 2025-11-01	1260.7 2025-09-01	1200 2025-03-01
Highest weighted rating	1216.7 2025-11-01	1211.2 2025-11-01	1204.9 2025-09-01	1200 2025-03-01
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	1304	1289.7	1260.7	1200
Analysis
Rating	1304	1289.7	1260.7	1200
Raw rating	1304	1289.7	1260.7	1200
Weighted rating	1216.7	1211.2	1214
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	804	789.7	760.7	700
Max/Min rating change allowed	143	145.9	152.1	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	1304	1289.7	1260.7	1200
New weighted rating	1224.3	1217.9	1218.2	1200
New weighted performance	0	0	0	0
Temp new rating	1304	1289.7	1260.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1304	1289.7	1260.7	1200
New K-factor	36	36	36	36
New floor	804	789.7	760.7	700

Item	Main	Standard	Rapid
	0	0	0
	19	13	6
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	19	13	6

Games since
	Main 19	Standard 13		Rapid 6		Blitz 0
Gender	Male
Age group	U14
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
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	19	11	57.89	67.1	1333.9	1401
Standard	13	7	53.85	32.7	1345	1377.7
Rapid	6	4	66.67	141.7	1309.9	1451.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	19	11	57.89	67.1	1333.9	1401
Standard	13	7	53.85	32.7	1345	1377.7
Rapid	6	4	66.67	141.7	1309.9	1451.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1304	1289.7	1260.7	1200
2025-09-30	1248.5	1218.4	1260.7	1200
2025-09-01	1248.5	1218.4	1260.7	1200
2025-08-01	1216.3	1218.4	1200	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	1199.9	1199.9	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
2024-09-01	1200	1200	1200	1200
2024-05-01	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

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	Paarl Boys' High School Chess Festival 2025 (Primary Schools)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
2	Kleinmond Chess Club Open 2025 (U14)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	4	Yes	Analysis
3	Cape Winelands Open 2025 (U14)	2025-07-19	2025-07-19	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
4	Cape Winelands Schools - Trials 1 2025 (U13 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	2	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Paarl Boys' High School Chess Festival 2025 (Primary Schools)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
2	Kleinmond Chess Club Open 2025 (U14)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	4	Yes	Analysis
3	Cape Winelands Open 2025 (U14)	2025-07-19	2025-07-19	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
4	Cape Winelands Schools - Trials 1 2025 (U13 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	2	1	Yes	Analysis

#	Games	Start				End
1	3	Tournament Paarl Boys' High School Chess Festival 2025				Tournament Paarl Boys' High School Chess Festival 2025
		date 2025-10-17	rnd 2	type Standard	result 1	date 2025-10-17	rnd 4	type Standard	result 1
		Opponent Visser, I (Izak)				Opponent Harman, C (Connor)
2	3	Tournament Cape Winelands Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-07-19	rnd 5	type Standard	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Qongqo, O (Othemba)				Opponent Arendse, V (Virgil)
3	2	Tournament Kleinmond Chess Club Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-30	rnd 4	type Rapid	result 1	date 2025-08-30	rnd 5	type Rapid	result 1
		Opponent Mouers, J (Jody-Lee)				Opponent Waldeck, A (Aaron)

#	Games	Start				End
1	1	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 5	type Standard	result 1	date 2025-07-19	rnd 5	type Standard	result 1
		Opponent Qongqo, O (Othemba)				Opponent Qongqo, O (Othemba)
2	1	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 1	type Standard	result 1
		Opponent Diedericks, C (Cayden)				Opponent Diedericks, C (Cayden)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 1	type Standard	result 1
		Opponent Coetzee, L (Leon)				Opponent Coetzee, L (Leon)

#	Games	Start				End
1	2	Tournament Kleinmond Chess Club Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-30	rnd 4	type Rapid	result 1	date 2025-08-30	rnd 5	type Rapid	result 1
		Opponent Mouers, J (Jody-Lee)				Opponent Waldeck, A (Aaron)
2	2	Tournament Kleinmond Chess Club Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-30	rnd 1	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Louw, K (Keegan)				Opponent Arendse, V (Virgil)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Cape Winelands Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-07-19	rnd 5	type Standard	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Qongqo, O (Othemba)				Opponent Arendse, V (Virgil)
2	2	Tournament Kleinmond Chess Club Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-30	rnd 4	type Rapid	result 1	date 2025-08-30	rnd 5	type Rapid	result 1
		Opponent Mouers, J (Jody-Lee)				Opponent Waldeck, A (Aaron)
3	1	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 1	type Standard	result 1
		Opponent Diedericks, C (Cayden)				Opponent Diedericks, C (Cayden)

#	Games	Start				End
1	1	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 5	type Standard	result 1	date 2025-07-19	rnd 5	type Standard	result 1
		Opponent Qongqo, O (Othemba)				Opponent Qongqo, O (Othemba)
2	1	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 1	type Standard	result 1
		Opponent Diedericks, C (Cayden)				Opponent Diedericks, C (Cayden)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 1	type Standard	result 1
		Opponent Coetzee, L (Leon)				Opponent Coetzee, L (Leon)

#	Games	Start				End
1	2	Tournament Kleinmond Chess Club Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-30	rnd 4	type Rapid	result 1	date 2025-08-30	rnd 5	type Rapid	result 1
		Opponent Mouers, J (Jody-Lee)				Opponent Waldeck, A (Aaron)
2	2	Tournament Kleinmond Chess Club Open 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-30	rnd 1	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Louw, K (Keegan)				Opponent Arendse, V (Virgil)

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	Coetzee ,L (Leon)	1	1	425	1	1	425	0	0	0	0	0	0
1	Coetzee ,L (Leon)	1	1170.9	1595.9	1	1164.2	1595.9	0	0	0	0	0	0
2	Grove ,T (Tyler)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Grove ,T (Tyler)	1	1327.2	902.2	1	1317.2	902.2	0	0	0	0	0	0
3	Botha ,J (Jason)	1	1	425	1	1	425	0	0	0	0	0	0
3	Botha ,J (Jason)	1	1195	1620	1	1193.9	1620	0	0	0	0	0	0
4	Harman ,C (Connor)	1	1	425	1	1	425	0	0	0	0	0	0
4	Harman ,C (Connor)	1	1347.6	1772.6	1	1301.7	1772.6	0	0	0	0	0	0
5	Brits ,C (Connor)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Brits ,C (Connor)	1	1509.8	1084.8	1	1494	1084.8	0	0	0	0	0	0
6	Vlok ,A (Adiaan)	1	1	425	1	1	425	0	0	0	0	0	0
6	Vlok ,A (Adiaan)	1	1609.6	2034.6	1	1629.7	2034.6	0	0	0	0	0	0
7	Harding ,J (Jodie)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Harding ,J (Jodie)	1	1348.4	923.4	1	1333.1	923.4	0	0	0	0	0	0
8	Kuypers ,P (Parker)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Kuypers ,P (Parker)	1	1501.8	1076.8	1	1469.5	1076.8	0	0	0	0	0	0
9	Visser ,I (Izak)	1	1	425	1	1	425	0	0	0	0	0	0
9	Visser ,I (Izak)	1	1203.7	1628.7	1	1191.8	1628.7	0	0	0	0	0	0
10	Diedericks ,C (Cayden)	1	1	425	1	1	425	0	0	0	0	0	0
10	Diedericks ,C (Cayden)	1	1529.6	1954.6	1	1500.1	1954.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

van der Merwe, 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