Chess South Africa Ratings Database

PLAYER PAGE

Personal

Viljoen, JA (Jacobus Andrew)

Chess SA id

171041756

FIDE id

Date of birth

1971-12-07 (Adult)

Gender

Male

Region

Dr Kenneth Kaunda (NWP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-03-02

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1262.3	1266.2	1100	1100
Raw rating	1262.3	1266.2	1100	1100
Weighted rating	1261.6	1265.3	1100	1100
Weighted performance	956.3	954.7	0	0
Floor	762.3	766.2	600	600
K-factor	36	36	40	40
Min/Max rating change allowed	151.7	150.9	191.2	191.2
Highest rating	1262.3 2024-04-01	1266.2 2024-04-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1262.3 2024-04-01	1266.2 2024-04-01	1100 2024-02-01	1100 2024-02-01
Highest weighted rating	1260.2 2025-08-01	1263.8 2025-08-01	1100 2024-11-01	1100 2024-11-01
Highest weighted performance	1253.6 2023-07-01	1254 2023-07-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1262.3	1266.2	1100	1100
Analysis
Rating	1262.3	1266.2	1100	1100
Raw rating	1262.3	1266.2	1100	1100
Weighted rating	1261.6	1265.3	1100
Weighted performance	956.3	954.7	0
K-factor	36	36	40	40
Floor	762.3	766.2	600	600
Max/Min rating change allowed	151.7	150.9	191.2	191.2
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	1262.3	1266.2	1100	1100
New weighted rating	1261.9	1265.7	1100	1100
New weighted performance	948.7	947.1	0	0
Temp new rating	1262.3	1266.2	1100	1100
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1262.3	1266.2	1100	1100
New K-factor	36	36	40	40
New floor	762.3	766.2	600	600

Item	Main	Standard
	0	0
	0	0
	5	5
	22	22
	2	2
	0	0
History	31	31

Games since
	Main 5	Standard 5		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	29	11	37.93	-102.6	1358.6	1256
Standard	29	11	37.93	-102.6	1358.6	1256
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1262.3	1266.2	1100	1100
2025-09-30	1262.3	1266.2	1100	1100
2025-09-01	1262.3	1266.2	1100	1100
2025-08-01	1262.3	1266.2	1100	1100
2025-07-01	1262.3	1266.2	1100	1100
2025-06-01	1262.3	1266.2	1100	1100
2025-05-01	1262.3	1266.2	1100	1100
2025-04-01	1262.3	1266.2	1100	1100
2025-03-01	1262.3	1266.2	1100	1100
2025-02-01	1262.3	1266.2	1100	1100
2025-01-01	1262.3	1266.2	1100	1100
2024-12-01	1262.3	1266.2	1100	1100
2024-11-01	1262.3	1266.2	1100	1100
2024-10-01	1262.3	1266.2	1100	1100
2024-09-01	1262.3	1266.2	1100	1100
2024-08-01	1262.3	1266.2	1100	1100
2024-07-01	1262.3	1266.2	1100	1100
2024-09-01	1262.3	1266.2	1100	1100
2024-05-01	1262.3	1266.2	1100	1100
2024-04-01	1262.3	1266.2	1100	1100
2024-03-01	1240.2	1240.6	1100	1100
2024-02-01	1240.2	1240.6	1100	1100
2024-01-01	1240.2	1240.6	1100	1100
2023-12-01	1240.2	1240.6	1100	1100

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	DR KKD Ferdies Mar 2024 (A)	2024-03-02	2024-03-02	Standard	Dr Kenneth Kaunda (NWP)	5	5	2	Yes	Analysis
2	DR Kenneth Kaunda Volkies 29 Jul 2023 (A)	2023-07-29	2023-07-29	Standard	Dr Kenneth Kaunda (NWP)	5	4	1	Yes	Analysis
3	Dr Kenneth Kaunda Volkies 2023 (A+B)	2023-06-10	2023-06-10	Standard	Dr Kenneth Kaunda (NWP)	5	5	2	Yes	Analysis
4	Dr KKD Curro 2023 (Open)	2023-05-13	2023-05-13	Standard	Dr Kenneth Kaunda (NWP)	5	5	3	Yes	Analysis
5	DR Kenneth Kaunda Curro 2023 (A+B)	2023-04-22	2023-04-22	Standard	Dr Kenneth Kaunda (NWP)	5	4	1	Yes	Analysis
6	Dr. Kenneth Kaunda Saamtrek 2023 (Open)	2023-02-04	2023-02-04	Standard	Dr Kenneth Kaunda (NWP)	5	4	2	Yes	Analysis
7	La Hoff Primary School 2022 (A)	2022-07-23	2022-07-23	Standard	Dr Kenneth Kaunda (NWP)	5	2	0	Yes	Analysis

#	Games	Start				End
1	3	Tournament DR KKD Ferdies Mar 2024				Tournament DR KKD Ferdies Mar 2024
		date 2024-03-02	rnd 2	type Standard	result 0.5	date 2024-03-02	rnd 4	type Standard	result 0.5
		Opponent Van Meersbergen, E (Ettienne)				Opponent Faku, M (Maphasa)
2	2	Tournament Dr KKD Curro 2023				Tournament Dr KKD Curro 2023
		date 2023-05-13	rnd 2	type Standard	result 1	date 2023-05-13	rnd 3	type Standard	result 1
		Opponent Segobola, K (Kgashane)				Opponent Malherbe, GM (Gideon)
3	1	Tournament DR Kenneth Kaunda Volkies 29 Jul 2023				Tournament DR Kenneth Kaunda Volkies 29 Jul 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-07-29	rnd 5	type Standard	result 1
		Opponent Hattingh, JH (Johannes)				Opponent Hattingh, JH (Johannes)

#	Games	Start				End
1	3	Tournament DR KKD Ferdies Mar 2024				Tournament DR KKD Ferdies Mar 2024
		date 2024-03-02	rnd 2	type Standard	result 0.5	date 2024-03-02	rnd 4	type Standard	result 0.5
		Opponent Van Meersbergen, E (Ettienne)				Opponent Faku, M (Maphasa)
2	2	Tournament Dr KKD Curro 2023				Tournament Dr KKD Curro 2023
		date 2023-05-13	rnd 2	type Standard	result 1	date 2023-05-13	rnd 3	type Standard	result 1
		Opponent Segobola, K (Kgashane)				Opponent Malherbe, GM (Gideon)
3	1	Tournament DR Kenneth Kaunda Volkies 29 Jul 2023				Tournament DR Kenneth Kaunda Volkies 29 Jul 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-07-29	rnd 5	type Standard	result 1
		Opponent Hattingh, JH (Johannes)				Opponent Hattingh, JH (Johannes)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Dr KKD Curro 2023				Tournament Dr KKD Curro 2023
		date 2023-05-13	rnd 2	type Standard	result 1	date 2023-05-13	rnd 3	type Standard	result 1
		Opponent Segobola, K (Kgashane)				Opponent Malherbe, GM (Gideon)
2	1	Tournament DR KKD Ferdies Mar 2024				Tournament DR KKD Ferdies Mar 2024
		date 2024-03-02	rnd 3	type Standard	result 1	date 2024-03-02	rnd 3	type Standard	result 1
		Opponent Meyambo, U (Unathi)				Opponent Meyambo, U (Unathi)
3	1	Tournament DR Kenneth Kaunda Volkies 29 Jul 2023				Tournament DR Kenneth Kaunda Volkies 29 Jul 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-07-29	rnd 5	type Standard	result 1
		Opponent Hattingh, JH (Johannes)				Opponent Hattingh, JH (Johannes)

#	Games	Start				End
1	2	Tournament Dr KKD Curro 2023				Tournament Dr KKD Curro 2023
		date 2023-05-13	rnd 2	type Standard	result 1	date 2023-05-13	rnd 3	type Standard	result 1
		Opponent Segobola, K (Kgashane)				Opponent Malherbe, GM (Gideon)
2	1	Tournament DR KKD Ferdies Mar 2024				Tournament DR KKD Ferdies Mar 2024
		date 2024-03-02	rnd 3	type Standard	result 1	date 2024-03-02	rnd 3	type Standard	result 1
		Opponent Meyambo, U (Unathi)				Opponent Meyambo, U (Unathi)
3	1	Tournament DR Kenneth Kaunda Volkies 29 Jul 2023				Tournament DR Kenneth Kaunda Volkies 29 Jul 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-07-29	rnd 5	type Standard	result 1
		Opponent Hattingh, JH (Johannes)				Opponent Hattingh, JH (Johannes)

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	Viljoen ,J (Jaden)	4	0	-425	4	0	-425	0	0	0	0	0	0
1	Viljoen ,J (Jaden)	4	1399.6	974.6	4	1400.7	974.6	0	0	0	0	0	0
2	Vermeulen ,EJ (Ernestus Jacobus)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Vermeulen ,EJ (Ernestus Jacobus)	2	1495.8	1070.8	2	1499.8	1070.8	0	0	0	0	0	0
3	Molusi ,K (Katlego)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Molusi ,K (Katlego)	2	1529.5	1104.5	2	1530.5	1104.5	0	0	0	0	0	0
4	Libisi ,L (Libisi)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Libisi ,L (Libisi)	2	1411.7	986.7	2	1423.1	986.7	0	0	0	0	0	0
5	Goede ,K (Kari)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Goede ,K (Kari)	2	1456.4	1031.4	2	1451	1031.4	0	0	0	0	0	0
6	Du Plessis ,P (Petro)	1	1	425	1	1	425	0	0	0	0	0	0
6	Du Plessis ,P (Petro)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Manhenda ,F (Farai)	1	1	425	1	1	425	0	0	0	0	0	0
7	Manhenda ,F (Farai)	1	1196.4	1621.4	1	1195.3	1621.4	0	0	0	0	0	0
8	Faku ,M (Maphasa)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Faku ,M (Maphasa)	1	1406.9	1406.9	1	1384.7	1406.9	0	0	0	0	0	0
9	Mazinyo ,M (Mpumelelo)	1	1	425	1	1	425	0	0	0	0	0	0
9	Mazinyo ,M (Mpumelelo)	1	1297	1722	1	1285.4	1722	0	0	0	0	0	0
10	Malherbe ,GM (Gideon Marius)	1	1	425	1	1	425	0	0	0	0	0	0
10	Malherbe ,GM (Gideon Marius)	1	853	1278	1	862.3	1278	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

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PLAYER PAGE

Personal

Viljoen, JA (Jacobus Andrew)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms