Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jonkers, D (Deon)

Chess SA id

106060482

FIDE id

Date of birth

2006-01-25 (U20)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2019-09-01

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1295.8	1203.9	1118.2	872.2
Raw rating	1295.8	1203.9	1118.2	872.2
Weighted rating	1295.8	1203.9	1118.2	872.2
Weighted performance	281.9	231.7	0	0
Floor	795.8	703.9	618.2	500
K-factor	36	36	40	40
Min/Max rating change allowed	144.7	164.9	186.3	264.5
Highest rating	1333.3 2019-09-01	1217 2019-09-01	1288.7 2019-07-01	1200 2024-02-01
Highest raw rating	1295.8 2024-02-01	1203.9 2024-02-01	1118.2 2024-02-01	872.2 2024-02-01
Highest weighted rating	1295.8 2024-02-01	1203.9 2024-02-01	1118.2 2024-11-01	872.2 2024-11-01
Highest weighted performance	1333.3 2019-09-01	1217 2019-09-01	1288.7 2019-07-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1295.8	1203.9	1118.2	872.2
Analysis
Rating	1295.8	1203.9	1118.2	872.2
Raw rating	1295.8	1203.9	1118.2	872.2
Weighted rating	1295.8	1203.9	1118.2
Weighted performance	281.9	231.7	0
K-factor	36	36	40	40
Floor	795.8	703.9	618.2	500
Max/Min rating change allowed	144.7	164.9	186.3	264.5
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	1295.8	1203.9	1118.2	872.2
New weighted rating	1295.8	1203.9	1118.2	872.2
New weighted performance	273.8	224.2	0	0
Temp new rating	1295.8	1203.9	1118.2	872.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1295.8	1203.9	1118.2	872.2
New K-factor	36	36	40	40
New floor	795.8	703.9	618.2	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	132	105	27

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U20
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	51	37	72.55	191.7	1021.8	1213.5
Standard	36	25	69.44	165.3	1012.7	1177.9
Rapid	15	12	80	255	1043.8	1298.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1295.8	1203.9	1118.2	872.2
2025-09-30	1295.8	1203.9	1118.2	872.2
2025-09-01	1295.8	1203.9	1118.2	872.2
2025-08-01	1295.8	1203.9	1118.2	872.2
2025-07-01	1295.8	1203.9	1118.2	872.2
2025-06-01	1295.8	1203.9	1118.2	872.2
2025-05-01	1295.8	1203.9	1118.2	872.2
2025-04-01	1295.8	1203.9	1118.2	872.2
2025-03-01	1295.8	1203.9	1118.2	872.2
2025-02-01	1295.8	1203.9	1118.2	872.2
2025-01-01	1295.8	1203.9	1118.2	872.2
2024-12-01	1295.8	1203.9	1118.2	872.2
2024-11-01	1295.8	1203.9	1118.2	872.2
2024-10-01	1295.8	1203.9	1118.2	872.2
2024-09-01	1295.8	1203.9	1118.2	872.2
2024-08-01	1295.8	1203.9	1118.2	872.2
2024-07-01	1295.8	1203.9	1118.2	872.2
2024-09-01	1295.8	1203.9	1118.2	872.2
2024-05-01	1295.8	1203.9	1118.2	872.2
2024-04-01	1295.8	1203.9	1118.2	872.2
2024-03-01	1295.8	1203.9	1118.2	872.2
2024-02-01	1295.8	1203.9	1118.2	872.2
2024-01-01	1295.8	1203.9	1118.2	872.2
2023-12-01	1295.8	1203.9	1118.2	872.2

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 2019 (U13 Mix)	2019-08-31	2019-09-01	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
2	Cape Winelands Schools - Top Schools 2019 (U13 Mix)	2019-07-27	2019-07-27	Rapid	Cape Winelands (WCW)	5	5	5	Yes	Analysis
3	Western Cape Schools Individuals 2019 (U13 Boys)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	3	Yes	Analysis
4	Cape Winelands Schools Closed 2019 (U13 Boys)	2019-03-16	2019-03-17	Standard	Cape Winelands (WCW)	7	7	5	Yes	Analysis
5	Stellenbosch Primary 2018 (U14)	2018-09-15	2018-09-15	Rapid	Cape Winelands (WCW)	7	5	3	Yes	Analysis
6	Western Cape Top Schools 2018 (U13 Mix)	2018-08-25	2018-08-26	Standard	Overberg (WOS)	5	5	4	Yes	Analysis
7	Cape Winelands Schools Chess - Top Schools 2018 (U13 Mix)	2018-07-28	2018-07-28	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
8	South African Junior Wildcard Championships 2017 (U12 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
9	South African Junior Team Championships 2017 (U12D)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	6	5	Yes	Analysis

#	Games	Start				End
1	10	Tournament Western Cape Schools Individuals 2019				Tournament Western Cape Top Schools 2019
		date 2019-05-19	rnd 6	type Standard	result 1	date 2019-09-01	rnd 4	type Standard	result 1
		Opponent Opperman, E (Eldon)				Opponent Van Zyl, M (Mea)
2	4	Tournament Western Cape Top Schools 2018				Tournament Western Cape Top Schools 2018
		date 2018-08-25	rnd 2	type Standard	result 1	date 2018-08-26	rnd 5	type Standard	result 1
		Opponent Sheldon, A (Ackim)				Opponent Saal, M (Migael)
3	4	Tournament South African Junior Team Championships 2017				Tournament South African Junior Wildcard Championships 2017
		date 2018-01-06	rnd 5	type Standard	result 1	date 2018-01-09	rnd 1	type Standard	result 1
		Opponent Xaba, B (Boitumelo)				Opponent Waring, G (Gabriel)

#	Games	Start				End
1	6	Tournament Western Cape Top Schools 2018				Tournament Cape Winelands Schools Closed 2019
		date 2018-08-25	rnd 2	type Standard	result 1	date 2019-03-16	rnd 2	type Standard	result 1
		Opponent Sheldon, A (Ackim)				Opponent Meyer, WK (Wayde)
2	5	Tournament Western Cape Schools Individuals 2019				Tournament Western Cape Top Schools 2019
		date 2019-05-19	rnd 6	type Standard	result 1	date 2019-09-01	rnd 4	type Standard	result 1
		Opponent Opperman, E (Eldon)				Opponent Van Zyl, M (Mea)
3	4	Tournament South African Junior Team Championships 2017				Tournament South African Junior Wildcard Championships 2017
		date 2018-01-06	rnd 5	type Standard	result 1	date 2018-01-09	rnd 1	type Standard	result 1
		Opponent Xaba, B (Boitumelo)				Opponent Waring, G (Gabriel)

#	Games	Start				End
1	5	Tournament Cape Winelands Schools - Top Schools 2019				Tournament Cape Winelands Schools - Top Schools 2019
		date 2019-07-27	rnd 1	type Rapid	result 1	date 2019-07-27	rnd 5	type Rapid	result 1
		Opponent Lockem , M (Marli)				Opponent Plaatjies, C (Charl)
2	3	Tournament Stellenbosch Primary 2018				Tournament Stellenbosch Primary 2018
		date 2018-09-15	rnd 3	type Rapid	result 1	date 2018-09-15	rnd 5	type Rapid	result 1
		Opponent Achiano, K (Kofi)				Opponent Gouenbaum, J (Joshua)
3	2	Tournament Cape Winelands Schools Chess - Top Schools 2018				Tournament Cape Winelands Schools Chess - Top Schools 2018
		date 2018-07-28	rnd 4	type Rapid	result 1	date 2018-07-28	rnd 5	type Rapid	result 1
		Opponent Brand, R (Robin)				Opponent Rennie, D (David)

No games found.

#	Games	Start				End

#	Games	Start				End
1	10	Tournament Western Cape Schools Individuals 2019				Tournament Western Cape Top Schools 2019
		date 2019-05-19	rnd 6	type Standard	result 1	date 2019-09-01	rnd 4	type Standard	result 1
		Opponent Opperman, E (Eldon)				Opponent Van Zyl, M (Mea)
2	4	Tournament Western Cape Top Schools 2018				Tournament Western Cape Top Schools 2018
		date 2018-08-25	rnd 2	type Standard	result 1	date 2018-08-26	rnd 5	type Standard	result 1
		Opponent Sheldon, A (Ackim)				Opponent Saal, M (Migael)
3	4	Tournament South African Junior Team Championships 2017				Tournament South African Junior Wildcard Championships 2017
		date 2018-01-06	rnd 5	type Standard	result 1	date 2018-01-09	rnd 1	type Standard	result 1
		Opponent Xaba, B (Boitumelo)				Opponent Waring, G (Gabriel)

#	Games	Start				End
1	6	Tournament Western Cape Top Schools 2018				Tournament Cape Winelands Schools Closed 2019
		date 2018-08-25	rnd 2	type Standard	result 1	date 2019-03-16	rnd 2	type Standard	result 1
		Opponent Sheldon, A (Ackim)				Opponent Meyer, WK (Wayde)
2	5	Tournament Western Cape Schools Individuals 2019				Tournament Western Cape Top Schools 2019
		date 2019-05-19	rnd 6	type Standard	result 1	date 2019-09-01	rnd 4	type Standard	result 1
		Opponent Opperman, E (Eldon)				Opponent Van Zyl, M (Mea)
3	4	Tournament South African Junior Team Championships 2017				Tournament South African Junior Wildcard Championships 2017
		date 2018-01-06	rnd 5	type Standard	result 1	date 2018-01-09	rnd 1	type Standard	result 1
		Opponent Xaba, B (Boitumelo)				Opponent Waring, G (Gabriel)

#	Games	Start				End
1	5	Tournament Cape Winelands Schools - Top Schools 2019				Tournament Cape Winelands Schools - Top Schools 2019
		date 2019-07-27	rnd 1	type Rapid	result 1	date 2019-07-27	rnd 5	type Rapid	result 1
		Opponent Lockem , M (Marli)				Opponent Plaatjies, C (Charl)
2	3	Tournament Stellenbosch Primary 2018				Tournament Stellenbosch Primary 2018
		date 2018-09-15	rnd 3	type Rapid	result 1	date 2018-09-15	rnd 5	type Rapid	result 1
		Opponent Achiano, K (Kofi)				Opponent Gouenbaum, J (Joshua)
3	2	Tournament Cape Winelands Schools Chess - Top Schools 2018				Tournament Cape Winelands Schools Chess - Top Schools 2018
		date 2018-07-28	rnd 4	type Rapid	result 1	date 2018-07-28	rnd 5	type Rapid	result 1
		Opponent Brand, R (Robin)				Opponent Rennie, D (David)

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	Sikiti ,Y (Yolani)	2	2	425	2	2	425	0	0	0	0	0	0
1	Sikiti ,Y (Yolani)	2	1139.9	1564.9	2	1066.8	1564.9	0	0	0	0	0	0
2	Roets ,Z (Zanru)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Roets ,Z (Zanru)	1	883	458	1	883	458	0	0	0	0	0	0
3	Dicks ,D (Drake)	1	1	425	1	1	425	0	0	0	0	0	0
3	Dicks ,D (Drake)	1	1298.4	1723.4	1	1283.8	1723.4	0	0	0	0	0	0
4	Phillips ,W (Waldo)	1	1	425	1	1	425	0	0	0	0	0	0
4	Phillips ,W (Waldo)	1	1128.1	1553.1	1	1001.8	1553.1	0	0	0	0	0	0
5	Olkers ,D (Declan)	1	1	425	1	1	425	0	0	0	0	0	0
5	Olkers ,D (Declan)	1	1281.7	1706.7	1	1253.7	1706.7	0	0	0	0	0	0
6	Meyer ,WK (Wayde Kyle)	1	1	425	1	1	425	0	0	0	0	0	0
6	Meyer ,WK (Wayde Kyle)	1	1028.6	1453.6	1	766.4	1453.6	0	0	0	0	0	0
7	Manzviyi ,E (Ebenezer)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Manzviyi ,E (Ebenezer)	1	754.1	329.1	1	794.4	329.1	0	0	0	0	0	0
8	Busuku ,A (Alute)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Busuku ,A (Alute)	1	1233.1	808.1	1	1226	808.1	0	0	0	0	0	0
9	Prinsloo ,R (Reinhardt)	1	1	425	1	1	425	0	0	0	0	0	0
9	Prinsloo ,R (Reinhardt)	1	652.6	1077.6	1	652.6	1077.6	0	0	0	0	0	0
10	Jefthas ,Z (Zairon)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Jefthas ,Z (Zairon)	1	1138.5	713.5	1	1200	713.5	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Jonkers, D (Deon)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms