Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jonker, WD (Wiehan Douw)

Chess SA id

103014325

FIDE id

Date of birth

2003-08-19 (Adult)

Gender

Male

Region

Dr Kenneth Kaunda (NWP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2022-12-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1459.3	1474.1	1214	1289.7
Raw rating	1459.3	1474.1	1214	1289.7
Weighted rating	1459.3	1474.1	1214	1289.7
Weighted performance	880.9	882.7	0	0
Floor	1011.8	1027.2	714	789.7
K-factor	32	32	36	36
Min/Max rating change allowed	114.6	112.2	162.5	145.9
Highest rating	1511.8 2022-10-01	1527.2 2022-10-01	1214 2019-08-01	1544.2 2022-03-01
Highest raw rating	1511.8 2022-10-01	1527.2 2022-10-01	1214 2024-02-01	1289.7 2024-02-01
Highest weighted rating	1511.8 2023-02-01	1527.2 2023-03-01	1214 2019-08-01	1289.5 2025-08-01
Highest weighted performance	1510.3 2022-09-01	1524.1 2022-09-01	1200 2024-02-01	1544.2 2022-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1459.3	1474.1	1214	1289.7
Analysis
Rating	1459.3	1474.1	1214	1289.7
Raw rating	1459.3	1474.1	1214	1289.7
Weighted rating	1459.3	1474.1	1214
Weighted performance	880.9	882.7	0
K-factor	32	32	36	36
Floor	1011.8	1027.2	714	789.7
Max/Min rating change allowed	114.6	112.2	162.5	145.9
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	1459.3	1474.1	1214	1289.7
New weighted rating	1459.3	1474.1	1214	1289.7
New weighted performance	872.4	874	0	0
Temp new rating	1459.3	1474.1	1214	1289.7
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1459.3	1474.1	1214	1289.7
New K-factor	32	32	36	36
New floor	1011.8	1027.2	714	789.7

Item	Main	Standard	Blitz
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	24	15	9
	15	15	0
History	437	428	9

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Dr Kenneth Kaunda (NWP)
Province	Northwest (NW)
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	105	66.5	63.33	113.3	1261.8	1375.1
Standard	96	61.5	64.06	119.5	1238.4	1357.9
Rapid	0	0	0	0	0	0
Blitz	9	5	55.56	47.2	1511.1	1558.3

Date	Main	Standard	Rapid	Blitz
2025-11-01	1459.3	1474.1	1214	1289.7
2025-09-30	1459.3	1474.1	1214	1289.7
2025-09-01	1459.3	1474.1	1214	1289.7
2025-08-01	1459.3	1474.1	1214	1289.7
2025-07-01	1459.3	1474.1	1214	1289.7
2025-06-01	1459.3	1474.1	1214	1289.7
2025-05-01	1459.3	1474.1	1214	1289.7
2025-04-01	1459.3	1474.1	1214	1289.7
2025-03-01	1459.3	1474.1	1214	1289.7
2025-02-01	1459.3	1474.1	1214	1289.7
2025-01-01	1459.3	1474.1	1214	1289.7
2024-12-01	1459.3	1474.1	1214	1289.7
2024-11-01	1459.3	1474.1	1214	1289.7
2024-10-01	1459.3	1474.1	1214	1289.7
2024-09-01	1459.3	1474.1	1214	1289.7
2024-08-01	1459.3	1474.1	1214	1289.7
2024-07-01	1459.3	1474.1	1214	1289.7
2024-09-01	1459.3	1474.1	1214	1289.7
2024-05-01	1459.3	1474.1	1214	1289.7
2024-04-01	1459.3	1474.1	1214	1289.7
2024-03-01	1459.3	1474.1	1214	1289.7
2024-02-01	1459.3	1474.1	1214	1289.7
2024-01-01	1459.3	1474.1	1214	1289.7
2023-12-01	1459.3	1474.1	1214	1283.1

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	2022 South African Junior Team Chess Championships (U20 Open+Girls)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	6	0.5	Yes	Analysis
2	Dr. KKD SAJCC Trials September 2022 (U18+U20)	2022-09-03	2022-09-03	Standard	Dr Kenneth Kaunda (NWP)	5	4	4	Yes	Analysis
3	Dr. KKD Volkskool 2022 (Open)	2022-08-20	2022-08-20	Standard	Dr Kenneth Kaunda (NWP)	5	5	4	Yes	Analysis
4	Rachella`s Cafe Blitz Tournament 1 2022	2022-03-20	2022-03-20	Blitz	Tshwane (GTP)	9	9	5	Yes	Analysis
5	Volkskool Proewe 2021 (U20)	2021-10-30	2021-10-30	Standard	Dr Kenneth Kaunda (NWP)	5	5	4	Yes	Analysis
6	Volkskool Tournament 2021 (Open)	2021-06-26	2021-06-26	Standard	Dr Kenneth Kaunda (NWP)	5	5	3.5	Yes	Analysis
7	Saamtrek 2021 (Open)	2021-06-12	2021-06-12	Standard	Dr Kenneth Kaunda (NWP)	5	5	4.5	Yes	Analysis
8	Gimnasium 2020 (U20)	2020-02-01	2020-02-01	Standard	Dr Kenneth Kaunda (NWP)	5	5	3.5	Yes	Analysis
9	2019 South African Junior Team Championships (U18B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	3	Yes	Analysis
10	Matlosana Mall 2019 (B)	2019-10-04	2019-10-04	Standard	Dr Kenneth Kaunda (NWP)	5	5	4	Yes	Analysis
11	Proewe 2019 (U20)	2019-08-03	2019-08-03	Standard	Dr Kenneth Kaunda (NWP)	5	5	3.5	Yes	Analysis
12	Proewe 2019 (U20 Girls)	2019-08-03	2019-08-03	Standard	Dr Kenneth Kaunda (NWP)	5	5	3.5	Yes	Analysis
13	Strathvaal 2019 (U18)	2019-04-13	2019-03-13	Standard	Dr Kenneth Kaunda (NWP)	5	5	3.5	Yes	Analysis
14	Volkskool 2019 (Ope)	2019-02-02	2019-02-02	Standard	Dr Kenneth Kaunda (NWP)	5	5	2	Yes	Analysis
15	South African Junior Team Championships 2018 (U16C)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	4.5	Yes	Analysis
16	Driefontein Proewe 2018 (O16 Seuns)	2018-07-28	2018-07-28	Standard	Dr Kenneth Kaunda (NWP)	5	5	3	Yes	Analysis
17	Volkies 2018 (U16)	2018-05-12	2018-05-12	Standard	Dr Kenneth Kaunda (NWP)	5	5	3	Yes	Analysis
18	Wesvalia 2018 (U16)	2018-02-17	2018-02-17	Standard	Dr Kenneth Kaunda (NWP)	5	5	5	Yes	Analysis
19	South African Junior Team Championships 2017 (U16B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis

#	Games	Start				End
1	20	Tournament Gimnasium 2020				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2020-02-01	rnd 2	type Standard	result 1	date 2022-03-20	rnd 1	type Blitz	result 1
		Opponent Ollewgen, J (Juan-Pierre)				Opponent Le Roux, P (Pieter)
2	7	Tournament Dr. KKD Volkskool 2022				Tournament Dr. KKD SAJCC Trials September 2022
		date 2022-08-20	rnd 3	type Standard	result 1	date 2022-09-03	rnd 5	type Standard	result 1
		Opponent Viljoen, J (Jaden)				Opponent Shole, B (Boitshepo)
3	7	Tournament Proewe 2019				Tournament Matlosana Mall 2019
		date 2019-08-03	rnd 3	type Standard	result 1	date 2019-10-04	rnd 4	type Standard	result 1
		Opponent Roux, D (Duval)				Opponent Van Der Westhuizen, F (Frederik)

#	Games	Start				End
1	20	Tournament Gimnasium 2020				Tournament Dr. KKD Volkskool 2022
		date 2020-02-01	rnd 2	type Standard	result 1	date 2022-08-20	rnd 1	type Standard	result 1
		Opponent Ollewgen, J (Juan-Pierre)				Opponent Scheepers, T (Talitha)
2	7	Tournament Dr. KKD Volkskool 2022				Tournament Dr. KKD SAJCC Trials September 2022
		date 2022-08-20	rnd 3	type Standard	result 1	date 2022-09-03	rnd 5	type Standard	result 1
		Opponent Viljoen, J (Jaden)				Opponent Shole, B (Boitshepo)
3	7	Tournament Proewe 2019				Tournament Matlosana Mall 2019
		date 2019-08-03	rnd 3	type Standard	result 1	date 2019-10-04	rnd 4	type Standard	result 1
		Opponent Roux, D (Duval)				Opponent Van Der Westhuizen, F (Frederik)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Rachella`s Cafe Blitz Tournament 1 2022				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2022-03-20	rnd 6	type Blitz	result 1	date 2022-03-20	rnd 8	type Blitz	result 1
		Opponent Nkoana, K (Koketso)				Opponent Nene, TH (Themba)
2	1	Tournament Rachella`s Cafe Blitz Tournament 1 2022				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2022-03-20	rnd 4	type Blitz	result 1	date 2022-03-20	rnd 4	type Blitz	result 1
		Opponent Reyneke, A (Anneline)				Opponent Reyneke, A (Anneline)
3	1	Tournament Rachella`s Cafe Blitz Tournament 1 2022				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2022-03-20	rnd 1	type Blitz	result 1	date 2022-03-20	rnd 1	type Blitz	result 1
		Opponent Le Roux, P (Pieter)				Opponent Le Roux, P (Pieter)

#	Games	Start				End
1	7	Tournament Dr. KKD Volkskool 2022				Tournament Dr. KKD SAJCC Trials September 2022
		date 2022-08-20	rnd 3	type Standard	result 1	date 2022-09-03	rnd 5	type Standard	result 1
		Opponent Viljoen, J (Jaden)				Opponent Shole, B (Boitshepo)
2	5	Tournament Proewe 2019				Tournament Matlosana Mall 2019
		date 2019-08-03	rnd 5	type Standard	result 1	date 2019-10-04	rnd 4	type Standard	result 1
		Opponent Dhlamini, B (Brian)				Opponent Van Der Westhuizen, F (Frederik)
3	5	Tournament Wesvalia 2018				Tournament Wesvalia 2018
		date 2018-02-17	rnd 1	type Standard	result 1	date 2018-02-17	rnd 5	type Standard	result 1
		Opponent Human, D (Dewald)				Opponent Viljoen, J (Jaden)

#	Games	Start				End
1	7	Tournament Dr. KKD Volkskool 2022				Tournament Dr. KKD SAJCC Trials September 2022
		date 2022-08-20	rnd 3	type Standard	result 1	date 2022-09-03	rnd 5	type Standard	result 1
		Opponent Viljoen, J (Jaden)				Opponent Shole, B (Boitshepo)
2	5	Tournament Proewe 2019				Tournament Matlosana Mall 2019
		date 2019-08-03	rnd 5	type Standard	result 1	date 2019-10-04	rnd 4	type Standard	result 1
		Opponent Dhlamini, B (Brian)				Opponent Van Der Westhuizen, F (Frederik)
3	5	Tournament Wesvalia 2018				Tournament Wesvalia 2018
		date 2018-02-17	rnd 1	type Standard	result 1	date 2018-02-17	rnd 5	type Standard	result 1
		Opponent Human, D (Dewald)				Opponent Viljoen, J (Jaden)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Rachella`s Cafe Blitz Tournament 1 2022				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2022-03-20	rnd 6	type Blitz	result 1	date 2022-03-20	rnd 8	type Blitz	result 1
		Opponent Nkoana, K (Koketso)				Opponent Nene, TH (Themba)
2	1	Tournament Rachella`s Cafe Blitz Tournament 1 2022				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2022-03-20	rnd 4	type Blitz	result 1	date 2022-03-20	rnd 4	type Blitz	result 1
		Opponent Reyneke, A (Anneline)				Opponent Reyneke, A (Anneline)
3	1	Tournament Rachella`s Cafe Blitz Tournament 1 2022				Tournament Rachella`s Cafe Blitz Tournament 1 2022
		date 2022-03-20	rnd 1	type Blitz	result 1	date 2022-03-20	rnd 1	type Blitz	result 1
		Opponent Le Roux, P (Pieter)				Opponent Le Roux, P (Pieter)

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	Jonker ,DE (Danica Elize)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
1	Jonker ,DE (Danica Elize)	4	1347.8	1454.1	4	1354.2	1454.1	0	0	0	0	0	0
2	Fourie ,EM (Elzette Mari)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
2	Fourie ,EM (Elzette Mari)	4	1248.8	1461.3	4	1249.5	1461.3	0	0	0	0	0	0
3	Tsatsi ,B (Bokamoso)	3	3	425	3	3	425	0	0	0	0	0	0
3	Tsatsi ,B (Bokamoso)	3	1147.3	1572.3	3	1134.1	1572.3	0	0	0	0	0	0
4	Viljoen ,J (Jaden)	3	3	425	3	3	425	0	0	0	0	0	0
4	Viljoen ,J (Jaden)	3	1186.9	1611.9	3	1182.1	1611.9	0	0	0	0	0	0
5	Raubenheimer ,D (Dian)	3	0	-425	3	0	-425	0	0	0	0	0	0
5	Raubenheimer ,D (Dian)	3	1429	1004	3	1440.6	1004	0	0	0	0	0	0
6	Dhlamini ,B (Brian)	3	3	425	3	3	425	0	0	0	0	0	0
6	Dhlamini ,B (Brian)	3	1231.4	1656.4	3	1233.8	1656.4	0	0	0	0	0	0
7	Cloete ,C (Christiaan)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
7	Cloete ,C (Christiaan)	3	1184.1	1042.4	3	1185.2	1042.4	0	0	0	0	0	0
8	Fouche ,J (Janu)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
8	Fouche ,J (Janu)	3	1448.3	1448.3	3	1451	1448.3	0	0	0	0	0	0
9	Human ,D (Dewald)	3	3	425	3	3	425	0	0	0	0	0	0
9	Human ,D (Dewald)	3	1147.6	1572.6	3	1141.6	1572.6	0	0	0	0	0	0
10	Aslett ,J (Juan-Naude)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
10	Aslett ,J (Juan-Naude)	3	958.7	1100.4	3	961.9	1100.4	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

Jonker, WD (Wiehan Douw)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms