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 (U16)

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

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1304	1289.7	1260.7	1200
Raw rating	1304	1289.7	1260.7	1200
Weighted rating	1231.6	1224.3	1222.2	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	1231.6	1224.3	1222.2
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	1238.5	1230.4	1226.1	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
2026-01-01	1304	1289.7	1260.7	1200
2025-11-30	1304	1289.7	1260.7	1200
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
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	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

Comming soon.

Tournaments

History

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	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

Ratings

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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