Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Merwe, SW (Schalk Wiehan)

Chess SA id

187039313

FIDE id

Date of birth

1987-12-15 (Adult)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

CPA

Chess SA registered

Last active game

2025-09-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1356.7	1357	1300	1300
Raw rating	1332.4	1331.4	1300	1300
Weighted rating	1356.7	1357	1299.7	1299.7
Weighted performance	0	0	0	0
Floor	870.2	870.6	800	800
K-factor	36	36	36	36
Min/Max rating change allowed	137.3	137.5	143.8	143.8
Highest rating	1392.6 2024-09-01	1391.8 2024-09-01	1300 2024-02-01	1300 2024-02-01
Highest raw rating	1370.2 2024-10-01	1370.6 2024-10-01	1300 2024-02-01	1300 2024-02-01
Highest weighted rating	1356.7 2025-11-01	1357 2025-11-01	1296.7 2025-08-01	1296.7 2025-08-01
Highest weighted performance	1392.6 2024-09-01	1391.8 2024-09-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.9	-1	0	0
New rating	1355.8	1356	1300	1300
Analysis
Rating	1356.7	1357	1300	1300
Raw rating	1332.4	1331.4	1300	1300
Weighted rating	1356.7	1357	1299.7
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	870.2	870.6	800	800
Max/Min rating change allowed	137.3	137.5	143.8	143.8
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	1332.4	1331.4	1300	1300
New weighted rating	1355.8	1356	1300	1300
New weighted performance	0	0	0	0
Temp new rating	1355.8	1356	1300	1300
Temp new rating +/-	-0.9	-1	0	0
Final new rating +/-	-0.9	-1	0	0
New rating	1355.8	1356	1300	1300
New K-factor	36	36	36	36
New floor	870.2	870.6	800	800

Item	Main	Standard
	0	0
	5	5
	6	6
	0	0
	12	12
	0	0
History	23	23

Games since
	Main 11	Standard 11		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	5	0.5	10	-340	1541.2	1201.2
Standard	5	0.5	10	-340	1541.2	1201.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	23	7.5	32.61	-147.8	1540.2	1392.4
Standard	23	7.5	32.61	-147.8	1540.2	1392.4
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1332.4	1331.4	1300	1300
2025-09-30	1370.2	1370.6	1300	1300
2025-09-01	1370.2	1370.6	1300	1300
2025-08-01	1370.2	1370.6	1300	1300
2025-07-01	1370.2	1370.6	1300	1300
2025-06-01	1370.2	1370.6	1300	1300
2025-05-01	1370.2	1370.6	1300	1300
2025-04-01	1370.2	1370.6	1300	1300
2025-03-01	1370.2	1370.6	1300	1300
2025-02-01	1370.2	1370.6	1300	1300
2025-01-01	1370.2	1370.6	1300	1300
2024-12-01	1370.2	1370.6	1300	1300
2024-11-01	1370.2	1370.6	1300	1300
2024-10-01	1370.2	1370.6	1300	1300
2024-09-01	1313.7	1314.4	1300	1300
2024-08-01	1313.7	1314.4	1300	1300
2024-07-01	1313.7	1314.4	1300	1300
2024-09-01	1313.7	1314.4	1300	1300
2024-05-01	1313.7	1314.4	1300	1300
2024-04-01	1313.7	1314.4	1300	1300
2024-03-01	1313.7	1314.4	1300	1300
2024-02-01	1313.7	1314.4	1300	1300
2024-01-01	1313.7	1314.4	1300	1300
2023-12-01	1266.8	1263.2	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	Cape Town Chess Federation Club League 2025 (A)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	3	0	Yes	Analysis
2	Cape Town Chess Federation Club League 2025 (C)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	2	0.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Cape Town Chess Federation Club League 2025 (A)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	3	0	Yes	Analysis
2	Cape Town Chess Federation Club League 2025 (C)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	2	0.5	Yes	Analysis
3	CT League 2024 (A)	2024-07-20	2024-09-07	Standard	Cape Town (WCT)	11	2	0.5	Yes	Analysis
4	CT League 2024 (C)	2024-07-20	2024-09-07	Standard	Cape Town (WCT)	11	4	2.5	Yes	Analysis
5	2022 Western Province Club League (B)	2022-08-20	2022-10-01	Standard	Cape Town (WCT)	11	7	1.5	Yes	Analysis
6	2022 Western Province Club League (B)	2022-08-20	2022-10-01	Standard	Cape Town (WCT)	11	5	2.5	Yes	Analysis

#	Games	Start				End
1	4	Tournament CT League 2024				Tournament CT League 2024
		date 2024-07-20	rnd 1	type Standard	result 1	date 2024-08-24	rnd 7	type Standard	result 0.5
		Opponent Roux, T (Tiaan)				Opponent Willenberg, LS (Lauren)
2	2	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-08-27	rnd 3	type Standard	result 1	date 2022-08-27	rnd 4	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jack)				Opponent Swartz, R (Robyn)
3	1	Tournament Cape Town Chess Federation Club League 2025				Tournament Cape Town Chess Federation Club League 2025
		date 2025-09-20	rnd 10	type Standard	result 0.5	date 2025-09-20	rnd 10	type Standard	result 0.5
		Opponent Carelse, RS (Reginald Stephen)				Opponent Carelse, RS (Reginald Stephen)

#	Games	Start				End
1	4	Tournament CT League 2024				Tournament CT League 2024
		date 2024-07-20	rnd 1	type Standard	result 1	date 2024-08-24	rnd 7	type Standard	result 0.5
		Opponent Roux, T (Tiaan)				Opponent Willenberg, LS (Lauren)
2	2	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-08-27	rnd 3	type Standard	result 1	date 2022-08-27	rnd 4	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jack)				Opponent Swartz, R (Robyn)
3	1	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-09-17	rnd 10	type Standard	result 0.5	date 2022-09-17	rnd 10	type Standard	result 0.5
		Opponent Salem, A (Abdarahim)				Opponent Salem, A (Abdarahim)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament CT League 2024				Tournament CT League 2024
		date 2024-07-20	rnd 1	type Standard	result 1	date 2024-07-20	rnd 2	type Standard	result 1
		Opponent Roux, T (Tiaan)				Opponent Xabadiya, N (Nizibone)
2	2	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-08-27	rnd 3	type Standard	result 1	date 2022-08-27	rnd 4	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jack)				Opponent Swartz, R (Robyn)
3	1	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-08-20	rnd 1	type Standard	result 1	date 2022-08-20	rnd 1	type Standard	result 1
		Opponent Davids, K (Keegan)				Opponent Davids, K (Keegan)

#	Games	Start				End
1	2	Tournament CT League 2024				Tournament CT League 2024
		date 2024-07-20	rnd 1	type Standard	result 1	date 2024-07-20	rnd 2	type Standard	result 1
		Opponent Roux, T (Tiaan)				Opponent Xabadiya, N (Nizibone)
2	2	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-08-27	rnd 3	type Standard	result 1	date 2022-08-27	rnd 4	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jack)				Opponent Swartz, R (Robyn)
3	1	Tournament 2022 Western Province Club League				Tournament 2022 Western Province Club League
		date 2022-08-20	rnd 1	type Standard	result 1	date 2022-08-20	rnd 1	type Standard	result 1
		Opponent Davids, K (Keegan)				Opponent Davids, K (Keegan)

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	Janse Van Rensburg ,J (Jack)	1	1	425	1	1	425	0	0	0	0	0	0
1	Janse Van Rensburg ,J (Jack)	1	1351.9	1776.9	1	1342.6	1776.9	0	0	0	0	0	0
2	Allie ,I (Ishmaeel)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Allie ,I (Ishmaeel)	1	1355	930	1	1317.9	930	0	0	0	0	0	0
3	Willenberg ,LS (Lauren Shante)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
3	Willenberg ,LS (Lauren Shante)	1	1564.5	1564.5	1	1566.7	1564.5	0	0	0	0	0	0
4	De Jager ,LJ (Luan Johannes)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	De Jager ,LJ (Luan Johannes)	1	1850	1425	1	1859.4	1425	0	0	0	0	0	0
5	Louw ,LT (Llewellyn Theodor)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Louw ,LT (Llewellyn Theodor)	1	1541.4	1116.4	1	1520.7	1116.4	0	0	0	0	0	0
6	Willenberg ,GI (Glen Ivan)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Willenberg ,GI (Glen Ivan)	1	1641.7	1216.7	1	1653.7	1216.7	0	0	0	0	0	0
7	Cuthbert ,M (Michael)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Cuthbert ,M (Michael)	1	1725	1300	1	1715.9	1300	0	0	0	0	0	0
8	Salem ,A (Abdarahim)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Salem ,A (Abdarahim)	1	1768.4	1768.4	1	1740.6	1768.4	0	0	0	0	0	0
9	Schutte ,A (Andre)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Schutte ,A (Andre)	1	1801.2	1376.2	1	1808.3	1376.2	0	0	0	0	0	0
10	Swartz ,R (Robyn)	1	1	425	1	1	425	0	0	0	0	0	0
10	Swartz ,R (Robyn)	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

Van Der Merwe, SW (Schalk Wiehan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms