Chess South Africa Ratings Database

PLAYER PAGE

Personal

Du Preez, J (Janco)

Chess SA id

105060685

FIDE id

Date of birth

2005-04-08 (Adult)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-09-03

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	765.3	745.5	661.2	500
Raw rating	765.3	745.5	661.2	500
Weighted rating	764.5	744.2	660.9	500
Weighted performance	0	0	0	0
Floor	500	500	500	500
K-factor	40	40	40	40
Min/Max rating change allowed	308	316.8	357.3	449.5
Highest rating	1229.2 2018-05-01	1294.3 2023-09-01	1268.5 2018-05-01	1200 2024-02-01
Highest raw rating	765.3 2024-02-01	745.5 2024-02-01	661.2 2024-02-01	500 2024-02-01
Highest weighted rating	765.3 2024-11-01	745.5 2024-11-01	661.2 2024-11-01	500 2024-11-01
Highest weighted performance	1229.2 2018-05-01	1294.3 2023-09-01	1268.5 2018-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	765.3	745.5	661.2	500
Analysis
Rating	765.3	745.5	661.2	500
Raw rating	765.3	745.5	661.2	500
Weighted rating	764.5	744.2	660.9
Weighted performance	0	0	0
K-factor	40	40	40	40
Floor	500	500	500	500
Max/Min rating change allowed	308	316.8	357.3	449.5
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	765.3	745.5	661.2	500
New weighted rating	765	745.1	661.1	500
New weighted performance	0	0	0	0
Temp new rating	765.3	745.5	661.2	500
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	765.3	745.5	661.2	500
New K-factor	40	40	40	40
New floor	500	500	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	5	5	0
	0	0	0
	0	0	0
History	20	10	10

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	10	7	70	170	1107.3	1277.3
Standard	5	3	60	85	1177.6	1262.6
Rapid	5	4	80	255	1037.1	1292.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	765.3	745.5	661.2	500
2025-09-01	765.3	745.5	661.2	500
2025-08-01	765.3	745.5	661.2	500
2025-07-01	765.3	745.5	661.2	500
2025-06-01	765.3	745.5	661.2	500
2025-05-01	765.3	745.5	661.2	500
2025-04-01	765.3	745.5	661.2	500
2025-03-01	765.3	745.5	661.2	500
2025-02-01	765.3	745.5	661.2	500
2025-01-01	765.3	745.5	661.2	500
2024-12-01	765.3	745.5	661.2	500
2024-11-01	765.3	745.5	661.2	500
2024-10-01	765.3	745.5	661.2	500
2024-09-01	765.3	745.5	661.2	500
2024-08-01	765.3	745.5	661.2	500
2024-07-01	765.3	745.5	661.2	500
2024-06-01	765.3	745.5	661.2	500
2024-08-01	765.3	745.5	661.2	500
2024-04-01	765.3	745.5	661.2	500
2024-03-01	765.3	745.5	661.2	500
2024-02-01	765.3	745.5	661.2	500
2024-01-01	765.3	745.5	661.2	500
2023-12-01	686.7	618.8	640.8	500
2023-11-01	686.7	618.8	640.8	500

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	Western Cape Top Schools 2023 (U7 Mixed)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
2	2018 Super 12 (Senior)	2018-05-05	2018-05-05	Rapid	Tshwane (GTP)	5	5	4	Yes	Analysis

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-05-05	rnd 3	type Rapid	result 1
		Opponent Yende, S (Siyanda)				Opponent Human, C (Christiaan)
2	2	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-03	rnd 4	type Standard	result 1	date 2023-09-03	rnd 5	type Standard	result 1
		Opponent Oberholzer, J (Justin)				Opponent Afrika, N (Nazley)
3	1	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-02	rnd 2	type Standard	result 1	date 2023-09-02	rnd 2	type Standard	result 1
		Opponent Van Der Merwe, F (Finley)				Opponent Van Der Merwe, F (Finley)

#	Games	Start				End
1	2	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-03	rnd 4	type Standard	result 1	date 2023-09-03	rnd 5	type Standard	result 1
		Opponent Oberholzer, J (Justin)				Opponent Afrika, N (Nazley)
2	1	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-02	rnd 2	type Standard	result 1	date 2023-09-02	rnd 2	type Standard	result 1
		Opponent Van Der Merwe, F (Finley)				Opponent Van Der Merwe, F (Finley)

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-05-05	rnd 3	type Rapid	result 1
		Opponent Yende, S (Siyanda)				Opponent Human, C (Christiaan)
2	1	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 5	type Rapid	result 1	date 2018-05-05	rnd 5	type Rapid	result 1
		Opponent Uys, H (Handri)				Opponent Uys, H (Handri)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-05-05	rnd 3	type Rapid	result 1
		Opponent Yende, S (Siyanda)				Opponent Human, C (Christiaan)
2	2	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-03	rnd 4	type Standard	result 1	date 2023-09-03	rnd 5	type Standard	result 1
		Opponent Oberholzer, J (Justin)				Opponent Afrika, N (Nazley)
3	1	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-02	rnd 2	type Standard	result 1	date 2023-09-02	rnd 2	type Standard	result 1
		Opponent Van Der Merwe, F (Finley)				Opponent Van Der Merwe, F (Finley)

#	Games	Start				End
1	2	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-03	rnd 4	type Standard	result 1	date 2023-09-03	rnd 5	type Standard	result 1
		Opponent Oberholzer, J (Justin)				Opponent Afrika, N (Nazley)
2	1	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-02	rnd 2	type Standard	result 1	date 2023-09-02	rnd 2	type Standard	result 1
		Opponent Van Der Merwe, F (Finley)				Opponent Van Der Merwe, F (Finley)

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-05-05	rnd 3	type Rapid	result 1
		Opponent Yende, S (Siyanda)				Opponent Human, C (Christiaan)
2	1	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 5	type Rapid	result 1	date 2018-05-05	rnd 5	type Rapid	result 1
		Opponent Uys, H (Handri)				Opponent Uys, H (Handri)

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	Oberholzer ,J (Justin)	1	1	425	1	1	425	0	0	0	0	0	0
1	Oberholzer ,J (Justin)	1	1169.5	1594.5	1	1188.4	1594.5	0	0	0	0	0	0
2	Van Der Merwe ,F (Finley)	1	1	425	1	1	425	0	0	0	0	0	0
2	Van Der Merwe ,F (Finley)	1	1097.8	1522.8	1	1080	1522.8	0	0	0	0	0	0
3	Afrika ,N (Nazley)	1	1	425	1	1	425	0	0	0	0	0	0
3	Afrika ,N (Nazley)	1	1097.3	1522.3	1	1200	1522.3	0	0	0	0	0	0
4	Fortuin ,L (Liam)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Fortuin ,L (Liam)	1	1180.9	755.9	1	1211.2	755.9	0	0	0	0	0	0
5	Van Den Berg ,T (Teagan)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Van Den Berg ,T (Teagan)	1	1342.5	917.5	1	1362.2	917.5	0	0	0	0	0	0
6	Yende ,S (Siyanda)	1	1	425	0	0	0	1	1	425	0	0	0
6	Yende ,S (Siyanda)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
7	De Beer ,J (Jhanco)	1	0	-425	0	0	0	1	0	-425	0	0	0
7	De Beer ,J (Jhanco)	1	871.2	446.2	0	0	0	1	846	446.2	0	0	0
8	Uys ,H (Handri)	1	1	425	0	0	0	1	1	425	0	0	0
8	Uys ,H (Handri)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
9	Hoon ,E (Eric)	1	1	425	0	0	0	1	1	425	0	0	0
9	Hoon ,E (Eric)	1	714.5	1139.5	0	0	0	1	613.2	1139.5	0	0	0
10	Human ,C (Christiaan)	1	1	425	0	0	0	1	1	425	0	0	0
10	Human ,C (Christiaan)	1	1200	1625	0	0	0	1	1200	1625	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Du Preez, J (Janco)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms