Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Merwe, S (Stefan)

Chess SA id

1090105295

FIDE id

Date of birth

2009-05-19 (U18)

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

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1134.3	1121.3	1200	1200
Raw rating	1134.3	1121.3	1200	1200
Weighted rating	1129.6	1115.2	1200	1200
Weighted performance	764.7	756.7	0	0
Floor	733.2	740	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	182.1	185.5	165.8	165.8
Highest rating	1233.2 2018-09-01	1240 2018-09-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1233.2 2018-09-01	1240 2018-09-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1233.2 2019-08-01	1240 2019-08-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1229.3 2018-08-01	1231.3 2018-08-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1134.3	1121.3	1200	1200
Analysis
Rating	1134.3	1121.3	1200	1200
Raw rating	1134.3	1121.3	1200	1200
Weighted rating	1129.6	1115.2	1200
Weighted performance	764.7	756.7	0
K-factor	36	36	36	36
Floor	733.2	740	700	700
Max/Min rating change allowed	182.1	185.5	165.8	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	1134.3	1121.3	1200	1200
New weighted rating	1130	1115.7	1200	1200
New weighted performance	764.4	756.3	0	0
Temp new rating	1134.3	1121.3	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1134.3	1121.3	1200	1200
New K-factor	36	36	36	36
New floor	733.2	740	700	700

Item	Main	Standard
	0	0
	8	8
	0	0
	8	8
	5	5
	0	0
History	37	37

Games since
	Main 8	Standard 8		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	8	3.5	43.75	-53.1	1183.4	1130.3
Standard	8	3.5	43.75	-53.1	1183.4	1130.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	37	15.5	41.89	-68.9	1189.8	1120.8
Standard	37	15.5	41.89	-68.9	1189.8	1120.8
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1134.3	1121.3	1200	1200
2025-09-01	1134.3	1121.3	1200	1200
2025-08-01	1128.7	1114	1200	1200
2025-07-01	1128.7	1114	1200	1200
2025-06-01	1128.2	1113.3	1200	1200
2025-05-01	1129.1	1114.5	1200	1200
2025-04-01	1129.1	1114.5	1200	1200
2025-03-01	1129.1	1114.5	1200	1200
2025-02-01	1129.1	1114.5	1200	1200
2025-01-01	1128.6	1113.9	1200	1200
2024-12-01	1128.6	1113.9	1200	1200
2024-11-01	1128.6	1113.9	1200	1200
2024-10-01	1128.6	1113.9	1200	1200
2024-09-01	1128.6	1113.9	1200	1200
2024-08-01	1128.6	1113.9	1200	1200
2024-07-01	1128.6	1113.9	1200	1200
2024-06-01	1128.6	1113.9	1200	1200
2024-08-01	1128.6	1113.9	1200	1200
2024-04-01	1128.6	1113.9	1200	1200
2024-03-01	1128.6	1113.9	1200	1200
2024-02-01	1128.6	1113.9	1200	1200
2024-01-01	1128.6	1113.9	1200	1200
2023-12-01	1128.6	1113.9	1200	1200
2023-11-01	1128.6	1113.9	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	D5 Teams 2025 (U17 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	3	3	1.5	Yes	Analysis
2	D5 Anker 2025 (U18 Boys)	2025-05-17	2025-05-17	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	D5 Teams 2025 (U17 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	3	3	1.5	Yes	Analysis
2	D5 Anker 2025 (U18 Boys)	2025-05-17	2025-05-17	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
3	Gauteng Open Arnold Classic 2023 (C)	2023-05-20	2023-05-20	Standard	Tshwane (GTP)	5	4	0	Yes	Analysis
4	Ekurhuleni Springs Open 4 March 2023 (D)	2023-03-04	2023-03-04	Standard	Ekurhuleni (GE)	5	4	2	Yes	Analysis
5	Ekurhuleni Chess Springs Club Open 2022 (D)	2022-09-03	2022-09-03	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
6	2019 Gauteng School League Finals (U11 Open)	2019-08-23	2019-08-23	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
7	2018 Gauteng League Final (U9)	2018-08-24	2018-08-24	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
8	D5 Primary Schools Teams 2018 (U9)	2018-08-17	2018-08-18	Standard	Ekurhuleni (GE)	6	6	4	Yes	Analysis

#	Games	Start				End
1	3	Tournament D5 Primary Schools Teams 2018				Tournament D5 Primary Schools Teams 2018
		date 2018-08-17	rnd 1	type Standard	result 1	date 2018-08-18	rnd 3	type Standard	result 1
		Opponent Rudman, W (Wikus)				Opponent Van Der Linde, B (Bennie)
2	2	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 3	type Standard	result 0.5
		Opponent Siyabonga, M (Makhanya)				Opponent Van Aswegen, T (Troy)
3	2	Tournament D5 Anker 2025				Tournament D5 Anker 2025
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 2	type Standard	result 1
		Opponent Vermeulen, J (Jayden)				Opponent Van Heerden, W (Werner)

#	Games	Start				End
1	3	Tournament D5 Primary Schools Teams 2018				Tournament D5 Primary Schools Teams 2018
		date 2018-08-17	rnd 1	type Standard	result 1	date 2018-08-18	rnd 3	type Standard	result 1
		Opponent Rudman, W (Wikus)				Opponent Van Der Linde, B (Bennie)
2	2	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 3	type Standard	result 0.5
		Opponent Siyabonga, M (Makhanya)				Opponent Van Aswegen, T (Troy)
3	2	Tournament D5 Anker 2025				Tournament D5 Anker 2025
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 2	type Standard	result 1
		Opponent Vermeulen, J (Jayden)				Opponent Van Heerden, W (Werner)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament D5 Primary Schools Teams 2018				Tournament D5 Primary Schools Teams 2018
		date 2018-08-17	rnd 1	type Standard	result 1	date 2018-08-18	rnd 3	type Standard	result 1
		Opponent Rudman, W (Wikus)				Opponent Van Der Linde, B (Bennie)
2	2	Tournament D5 Anker 2025				Tournament D5 Anker 2025
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 2	type Standard	result 1
		Opponent Vermeulen, J (Jayden)				Opponent Van Heerden, W (Werner)
3	2	Tournament 2018 Gauteng League Final				Tournament 2018 Gauteng League Final
		date 2018-08-24	rnd 4	type Standard	result 1	date 2018-08-24	rnd 5	type Standard	result 1
		Opponent Ramobola, H (Hope)				Opponent Van Heerden, JPC (John Paterson Carnavo)

#	Games	Start				End
1	3	Tournament D5 Primary Schools Teams 2018				Tournament D5 Primary Schools Teams 2018
		date 2018-08-17	rnd 1	type Standard	result 1	date 2018-08-18	rnd 3	type Standard	result 1
		Opponent Rudman, W (Wikus)				Opponent Van Der Linde, B (Bennie)
2	2	Tournament D5 Anker 2025				Tournament D5 Anker 2025
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 2	type Standard	result 1
		Opponent Vermeulen, J (Jayden)				Opponent Van Heerden, W (Werner)
3	2	Tournament 2018 Gauteng League Final				Tournament 2018 Gauteng League Final
		date 2018-08-24	rnd 4	type Standard	result 1	date 2018-08-24	rnd 5	type Standard	result 1
		Opponent Ramobola, H (Hope)				Opponent Van Heerden, JPC (John Paterson Carnavo)

No games found.

#	Games	Start				End

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	Van Der Linde ,B (Bennie)	2	2	425	2	2	425	0	0	0	0	0	0
1	Van Der Linde ,B (Bennie)	2	1200	1625	2	1200	1625	0	0	0	0	0	0
2	Rudman ,W (Wikus)	2	1	0	2	1	0	0	0	0	0	0	0
2	Rudman ,W (Wikus)	2	1200	1200	2	1200	1200	0	0	0	0	0	0
3	Slabbert ,A (Alex-Zander)	2	1	0	2	1	0	0	0	0	0	0	0
3	Slabbert ,A (Alex-Zander)	2	1200	1200	2	1200	1200	0	0	0	0	0	0
4	Elvin ,A (Andrew)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Elvin ,A (Andrew)	1	1248.8	823.8	1	1260.8	823.8	0	0	0	0	0	0
5	Del Grosso ,G (Gianluca Gabriele)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Del Grosso ,G (Gianluca Gabriele)	1	1390.7	965.7	1	1388	965.7	0	0	0	0	0	0
6	Mafane ,B (Bontle)	1	1	425	1	1	425	0	0	0	0	0	0
6	Mafane ,B (Bontle)	1	1130.4	1555.4	1	1120.8	1555.4	0	0	0	0	0	0
7	Hogeweg ,A (Aidan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Hogeweg ,A (Aidan)	1	1260	835	1	1249.9	835	0	0	0	0	0	0
8	Morgan ,V (Vayden)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Morgan ,V (Vayden)	1	1200	775	1	1200	775	0	0	0	0	0	0
9	Van Aswegen ,T (Troy)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Van Aswegen ,T (Troy)	1	1295.3	1295.3	1	1297.5	1295.3	0	0	0	0	0	0
10	Van Heerden ,W (Werner)	1	1	425	1	1	425	0	0	0	0	0	0
10	Van Heerden ,W (Werner)	1	1200	1625	1	1200	1625	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

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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