Chess South Africa Ratings Database

PLAYER PAGE

Personal

Du Preez, J (Johan)

Chess SA id

1660143623

FIDE id

Date of birth

1966-09-14 (Adult)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-05-03

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1271.2	1300	1101.1	1300
Raw rating	1269.4	1300	1101.1	1300
Weighted rating	1271.2	1299	1100.2	1299
Weighted performance	0	0	0	0
Floor	774.5	800	700	800
K-factor	36	36	36	36
Min/Max rating change allowed	150.2	143.8	190.9	143.8
Highest rating	1274.5 2024-02-01	1300 2024-02-01	1200 2018-10-01	1300 2024-02-01
Highest raw rating	1274.5 2024-02-01	1300 2024-02-01	1200 2019-12-01	1300 2024-02-01
Highest weighted rating	1269.4 2025-08-01	1296.7 2025-08-01	1200 2018-10-01	1296.7 2025-08-01
Highest weighted performance	1200 2019-12-01	1200 2024-02-01	1200 2019-12-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.4	0	0	0
New rating	1271.6	1300	1101.1	1300
Analysis
Rating	1271.2	1300	1101.1	1300
Raw rating	1269.4	1300	1101.1	1300
Weighted rating	1271.2	1299	1100.2
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	774.5	800	700	800
Max/Min rating change allowed	150.2	143.8	190.9	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	1269.4	1300	1101.1	1300
New weighted rating	1271.6	1299.7	1100.4	1299.7
New weighted performance	0	0	0	0
Temp new rating	1271.6	1300	1101.1	1300
Temp new rating +/-	0.4	0	0	0
Final new rating +/-	0.4	0	0	0
New rating	1271.6	1300	1101.1	1300
New K-factor	36	36	36	36
New floor	774.5	800	700	800

Item	Main	Rapid
	0	0
	6	6
	0	0
	6	6
	5	5
	0	0
History	17	17

Games since
	Main 12	Standard 0		Rapid 12		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	6	2	33.33	-141.7	1248.5	1106.8
Standard	0	0	0	0	0	0
Rapid	6	2	33.33	-141.7	1248.5	1106.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	17	5	29.41	-175	1256.8	1081.8
Standard	0	0	0	0	0	0
Rapid	17	5	29.41	-175	1256.8	1081.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1269.4	1300	1101.1	1300
2025-09-01	1269.4	1300	1101.1	1300
2025-08-01	1269.4	1300	1101.1	1300
2025-07-01	1268.1	1300	1101.1	1300
2025-06-01	1265.5	1300	1101.1	1300
2025-05-01	1274.5	1300	1104.7	1300
2025-04-01	1274.5	1300	1104.7	1300
2025-03-01	1274.5	1300	1104.7	1300
2025-02-01	1274.5	1300	1104.7	1300
2025-01-01	1274.5	1300	1096.8	1300
2024-12-01	1274.5	1300	1096.8	1300
2024-11-01	1274.5	1300	1096.8	1300
2024-10-01	1274.5	1300	1096.8	1300
2024-09-01	1274.5	1300	1096.8	1300
2024-08-01	1274.5	1300	1096.8	1300
2024-07-01	1274.5	1300	1096.8	1300
2024-06-01	1274.5	1300	1096.8	1300
2024-08-01	1274.5	1300	1096.8	1300
2024-04-01	1274.5	1300	1096.8	1300
2024-03-01	1274.5	1300	1096.8	1300
2024-02-01	1274.5	1300	1096.8	1300
2024-01-01	1274.5	1300	1096.8	1300
2023-12-01	1169.9	1200	1096.8	1200
2023-11-01	1169.9	1200	1096.8	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	Brave Knights Rapid 2025 (Open)	2025-05-03	2025-05-03	Rapid	Cape Winelands (WCW)	6	6	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Brave Knights Rapid 2025 (Open)	2025-05-03	2025-05-03	Rapid	Cape Winelands (WCW)	6	6	2	Yes	Analysis
2	Bonnievale Open Rapid 2023 (Intermediate)	2023-10-21	2023-10-21	Rapid	Cape Winelands (WCW)	6	6	1	Yes	Analysis
3	Curro Durbanville Chess Open Rapid 2022 (Parents)	2022-07-02	2022-07-02	Rapid	Cape Town (WCT)	5	5	2	Yes	Analysis

#	Games	Start				End
1	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 5	type Rapid	result 1	date 2025-05-03	rnd 5	type Rapid	result 1
		Opponent Coetzer, J (Jean Pierre)				Opponent Coetzer, J (Jean Pierre)
2	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 2	type Rapid	result 1	date 2025-05-03	rnd 2	type Rapid	result 1
		Opponent Coetzer, N (Nicolene)				Opponent Coetzer, N (Nicolene)
3	1	Tournament Bonnievale Open Rapid 2023				Tournament Bonnievale Open Rapid 2023
		date 2023-10-21	rnd 6	type Rapid	result 1	date 2023-10-21	rnd 6	type Rapid	result 1
		Opponent Van Niekerk, J (Johan)				Opponent Van Niekerk, J (Johan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 5	type Rapid	result 1	date 2025-05-03	rnd 5	type Rapid	result 1
		Opponent Coetzer, J (Jean Pierre)				Opponent Coetzer, J (Jean Pierre)
2	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 2	type Rapid	result 1	date 2025-05-03	rnd 2	type Rapid	result 1
		Opponent Coetzer, N (Nicolene)				Opponent Coetzer, N (Nicolene)
3	1	Tournament Bonnievale Open Rapid 2023				Tournament Bonnievale Open Rapid 2023
		date 2023-10-21	rnd 6	type Rapid	result 1	date 2023-10-21	rnd 6	type Rapid	result 1
		Opponent Van Niekerk, J (Johan)				Opponent Van Niekerk, J (Johan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 5	type Rapid	result 1	date 2025-05-03	rnd 5	type Rapid	result 1
		Opponent Coetzer, J (Jean Pierre)				Opponent Coetzer, J (Jean Pierre)
2	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 2	type Rapid	result 1	date 2025-05-03	rnd 2	type Rapid	result 1
		Opponent Coetzer, N (Nicolene)				Opponent Coetzer, N (Nicolene)
3	1	Tournament Bonnievale Open Rapid 2023				Tournament Bonnievale Open Rapid 2023
		date 2023-10-21	rnd 6	type Rapid	result 1	date 2023-10-21	rnd 6	type Rapid	result 1
		Opponent Van Niekerk, J (Johan)				Opponent Van Niekerk, J (Johan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 5	type Rapid	result 1	date 2025-05-03	rnd 5	type Rapid	result 1
		Opponent Coetzer, J (Jean Pierre)				Opponent Coetzer, J (Jean Pierre)
2	1	Tournament Brave Knights Rapid 2025				Tournament Brave Knights Rapid 2025
		date 2025-05-03	rnd 2	type Rapid	result 1	date 2025-05-03	rnd 2	type Rapid	result 1
		Opponent Coetzer, N (Nicolene)				Opponent Coetzer, N (Nicolene)
3	1	Tournament Bonnievale Open Rapid 2023				Tournament Bonnievale Open Rapid 2023
		date 2023-10-21	rnd 6	type Rapid	result 1	date 2023-10-21	rnd 6	type Rapid	result 1
		Opponent Van Niekerk, J (Johan)				Opponent Van Niekerk, J (Johan)

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	Goeieman ,J (Jody-Anne)	1	0	-425	0	0	0	1	0	-425	0	0	0
1	Goeieman ,J (Jody-Anne)	1	1394.1	969.1	0	0	0	1	971.4	969.1	0	0	0
2	Petersen ,R (Randel)	1	0	-425	0	0	0	1	0	-425	0	0	0
2	Petersen ,R (Randel)	1	1200	775	0	0	0	1	1200	775	0	0	0
3	Edwards ,B (Brandon)	1	0	-425	0	0	0	1	0	-425	0	0	0
3	Edwards ,B (Brandon)	1	1276.9	851.9	0	0	0	1	1104.8	851.9	0	0	0
4	Choli ,T (Thimwa Angel)	1	0	-425	0	0	0	1	0	-425	0	0	0
4	Choli ,T (Thimwa Angel)	1	1394	969	0	0	0	1	1191.2	969	0	0	0
5	Weideman ,J (Jaco)	1	1	425	0	0	0	1	1	425	0	0	0
5	Weideman ,J (Jaco)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
6	Naude ,J (Jan-Daniel)	1	0	-425	0	0	0	1	0	-425	0	0	0
6	Naude ,J (Jan-Daniel)	1	1324.8	899.8	0	0	0	1	1295.5	899.8	0	0	0
7	Van Der Linde ,L (Luandi)	1	0	-425	0	0	0	1	0	-425	0	0	0
7	Van Der Linde ,L (Luandi)	1	1402.5	977.5	0	0	0	1	1298.8	977.5	0	0	0
8	Coetzer ,J (Jean Pierre)	1	1	425	0	0	0	1	1	425	0	0	0
8	Coetzer ,J (Jean Pierre)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
9	Steyn ,A (Albert)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Steyn ,A (Albert)	1	1200	775	0	0	0	1	1200	775	0	0	0
10	Rock ,M (Mieke)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Rock ,M (Mieke)	1	1166.9	741.9	0	0	0	1	1201	741.9	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Du Preez, J (Johan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms