Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Rooyen, JAK (Johan)

Chess SA id

104056519

FIDE id

Date of birth

2004-02-11 (Adult)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-08-31

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1229.4	1234.7	1044.6	1066.2
Raw rating	1229.4	1234.7	1044.6	1066.2
Weighted rating	1228.5	1233.7	1044.5	1066.2
Weighted performance	646.4	528.8	0	0
Floor	838.4	831.1	566.2	566.2
K-factor	36	36	40	40
Min/Max rating change allowed	159	157.8	206.9	200.6
Highest rating	1352.4 2019-06-01	1345 2019-06-01	1200 2020-01-01	1200 2024-02-01
Highest raw rating	1338.4 2019-07-01	1331.1 2019-07-01	1066.2 2020-01-01	1066.2 2024-02-01
Highest weighted rating	1338.4 2021-03-01	1331.1 2021-03-01	1066.2 2024-11-01	1066.2 2024-11-01
Highest weighted performance	1352.4 2019-06-01	1345 2019-06-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1229.4	1234.7	1044.6	1066.2
Analysis
Rating	1229.4	1234.7	1044.6	1066.2
Raw rating	1229.4	1234.7	1044.6	1066.2
Weighted rating	1228.5	1233.7	1044.5
Weighted performance	646.4	528.8	0
K-factor	36	36	40	40
Floor	838.4	831.1	566.2	566.2
Max/Min rating change allowed	159	157.8	206.9	200.6
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	1229.4	1234.7	1044.6	1066.2
New weighted rating	1228.4	1233.6	1044.5	1066.2
New weighted performance	639.7	521.8	0	0
Temp new rating	1229.4	1234.7	1044.6	1066.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1229.4	1234.7	1044.6	1066.2
New K-factor	36	36	40	40
New floor	838.4	831.1	566.2	566.2

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	4	4	0
	4	0	4
	0	0	0
	0	0	0
History	296	292	4

Games since
	Main 4	Standard 4		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Sedibeng (GSV)
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	71	41.5	58.45	71.8	1073.9	1145.7
Standard	67	40.5	60.45	88.8	1058.8	1147.6
Rapid	4	1	25	-212.5	1325.9	1113.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1229.4	1234.7	1044.6	1066.2
2025-09-30	1229.4	1234.7	1044.6	1066.2
2025-09-01	1229.4	1234.7	1044.6	1066.2
2025-08-01	1229.4	1234.7	1044.6	1066.2
2025-07-01	1229.4	1234.7	1044.6	1066.2
2025-06-01	1229.4	1234.7	1044.6	1066.2
2025-05-01	1229.4	1234.7	1044.6	1066.2
2025-04-01	1229.4	1234.7	1044.6	1066.2
2025-03-01	1229.4	1234.7	1044.6	1066.2
2025-02-01	1228.9	1234	1044.6	1066.2
2025-01-01	1218	1221.2	1044.2	1066.2
2024-12-01	1218	1221.2	1044.2	1066.2
2024-11-01	1218	1221.2	1044.2	1066.2
2024-10-01	1218	1221.2	1044.2	1066.2
2024-09-01	1234.7	1241.4	1044.2	1066.2
2024-08-01	1234.7	1241.4	1044.2	1066.2
2024-07-01	1234.7	1241.4	1044.2	1066.2
2024-09-01	1234.7	1241.4	1044.2	1066.2
2024-05-01	1234.7	1241.4	1044.2	1066.2
2024-04-01	1234.7	1241.4	1044.2	1066.2
2024-03-01	1234.7	1241.4	1044.2	1066.2
2024-02-01	1234.7	1241.4	1044.2	1066.2
2024-01-01	1234.7	1241.4	1044.2	1066.2
2023-12-01	1234.7	1241.4	1044.2	1066.2

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	North School Primary Chess Open 2024 (A)	2024-08-31	2024-08-31	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
2	VaalPark Primary Open Chess 2023 (A)	2023-06-16	2023-06-16	Rapid	Sedibeng (GSV)	5	4	1	Yes	Analysis
3	2019 South African Junior Team Championships (U16C)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	3	Yes	Analysis
4	Fonteine Ope 2019 (A)	2019-10-19	2019-10-19	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
5	GE vs GSV Inter Regional 2019 (U16C)	2019-10-26	2019-10-26	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
6	Vaal Chess Club Open 2019 (B)	2019-06-01	2019-06-01	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
7	Word of Life 2019 (B)	2019-05-11	2019-05-11	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
8	Amigo Spur Eligwa Chess Open 2019 (B)	2019-05-18	2019-05-18	Standard	Sedibeng (GSV)	5	5	4.5	Yes	Analysis
9	Dirk de Koster Chess Open 2019 (B)	2019-04-13	2019-04-13	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
10	Carels Open 2019 (B)	2019-03-02	2019-03-02	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
11	Sasolburg Open 2018 (B)	2018-06-02	2018-06-02	Standard	Sedibeng (GSV)	5	4	2.5	Yes	Analysis
12	Amigo Spur Eligwa Chess Open 2018 (B)	2018-05-19	2018-05-19	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
13	Carels Open 2018 (B)	2018-03-03	2018-03-03	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
14	South African Junior Team Championships 2017 (U14D)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	5.5	Yes	Analysis

#	Games	Start				End
1	12	Tournament Word of Life 2019				Tournament Vaal Chess Club Open 2019
		date 2019-05-11	rnd 2	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Guldenpfennig, CB (Conrad)				Opponent Pretorius, WM (Willem)
2	7	Tournament South African Junior Team Championships 2017				Tournament Carels Open 2018
		date 2018-01-04	rnd 2	type Standard	result 1	date 2018-03-03	rnd 1	type Standard	result 1
		Opponent Daniel, CV (Christiaan)				Opponent Tsolo, K (Karabo)
3	5	Tournament Carels Open 2019				Tournament Dirk de Koster Chess Open 2019
		date 2019-03-02	rnd 4	type Standard	result 1	date 2019-04-13	rnd 3	type Standard	result 1
		Opponent Khumalo, N (Nkosinathi)				Opponent Nxumalo, S (Siyabonga)

#	Games	Start				End
1	12	Tournament Word of Life 2019				Tournament Vaal Chess Club Open 2019
		date 2019-05-11	rnd 2	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Guldenpfennig, CB (Conrad)				Opponent Pretorius, WM (Willem)
2	7	Tournament South African Junior Team Championships 2017				Tournament Carels Open 2018
		date 2018-01-04	rnd 2	type Standard	result 1	date 2018-03-03	rnd 1	type Standard	result 1
		Opponent Daniel, CV (Christiaan)				Opponent Tsolo, K (Karabo)
3	5	Tournament Carels Open 2019				Tournament Dirk de Koster Chess Open 2019
		date 2019-03-02	rnd 4	type Standard	result 1	date 2019-04-13	rnd 3	type Standard	result 1
		Opponent Khumalo, N (Nkosinathi)				Opponent Nxumalo, S (Siyabonga)

#	Games	Start				End
1	1	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 4	type Rapid	result 1	date 2023-06-16	rnd 4	type Rapid	result 1
		Opponent Visser, TM (Tracy)				Opponent Visser, TM (Tracy)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament Word of Life 2019				Tournament Amigo Spur Eligwa Chess Open 2019
		date 2019-05-11	rnd 2	type Standard	result 1	date 2019-05-18	rnd 4	type Standard	result 1
		Opponent Guldenpfennig, CB (Conrad)				Opponent Ledwaba, TM (Thabang)
2	3	Tournament Vaal Chess Club Open 2019				Tournament Vaal Chess Club Open 2019
		date 2019-06-01	rnd 1	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Tyantini, A (Andile)				Opponent Pretorius, WM (Willem)
3	3	Tournament South African Junior Team Championships 2017				Tournament Carels Open 2018
		date 2018-01-07	rnd 6	type Standard	result 1	date 2018-03-03	rnd 1	type Standard	result 1
		Opponent Van Der Mescht, MJ (Marnus)				Opponent Tsolo, K (Karabo)

#	Games	Start				End
1	8	Tournament Word of Life 2019				Tournament Amigo Spur Eligwa Chess Open 2019
		date 2019-05-11	rnd 2	type Standard	result 1	date 2019-05-18	rnd 4	type Standard	result 1
		Opponent Guldenpfennig, CB (Conrad)				Opponent Ledwaba, TM (Thabang)
2	3	Tournament Vaal Chess Club Open 2019				Tournament Vaal Chess Club Open 2019
		date 2019-06-01	rnd 1	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Tyantini, A (Andile)				Opponent Pretorius, WM (Willem)
3	3	Tournament South African Junior Team Championships 2017				Tournament Carels Open 2018
		date 2018-01-07	rnd 6	type Standard	result 1	date 2018-03-03	rnd 1	type Standard	result 1
		Opponent Van Der Mescht, MJ (Marnus)				Opponent Tsolo, K (Karabo)

#	Games	Start				End
1	1	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 4	type Rapid	result 1	date 2023-06-16	rnd 4	type Rapid	result 1
		Opponent Visser, TM (Tracy)				Opponent Visser, TM (Tracy)

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	Sejeng ,O (Onkatlile)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Sejeng ,O (Onkatlile)	3	1139.8	998.2	3	1157.7	998.2	0	0	0	0	0	0
2	Van Der Mescht ,MJ (Marnus)	2	2	425	2	2	425	0	0	0	0	0	0
2	Van Der Mescht ,MJ (Marnus)	2	936.8	1361.8	2	932.9	1361.8	0	0	0	0	0	0
3	Rossouw ,AW (Andreas)	2	1	0	2	1	0	0	0	0	0	0	0
3	Rossouw ,AW (Andreas)	2	950.7	950.7	2	950.7	950.7	0	0	0	0	0	0
4	Saunderson ,F (Fredricht)	2	1	0	2	1	0	0	0	0	0	0	0
4	Saunderson ,F (Fredricht)	2	1000.5	1000.5	2	997.8	1000.5	0	0	0	0	0	0
5	Minnaar ,JP (Jaun Pierre)	2	1	0	2	1	0	0	0	0	0	0	0
5	Minnaar ,JP (Jaun Pierre)	2	1273.6	1273.6	2	1279.5	1273.6	0	0	0	0	0	0
6	Mthimkulu ,K (Kenneth)	1	1	425	1	1	425	0	0	0	0	0	0
6	Mthimkulu ,K (Kenneth)	1	1208	1633	1	1214.8	1633	0	0	0	0	0	0
7	Evans ,R (Robyn)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
7	Evans ,R (Robyn)	1	1169.6	1169.6	1	1160.7	1169.6	0	0	0	0	0	0
8	Tsolo ,K (Karabo)	1	1	425	1	1	425	0	0	0	0	0	0
8	Tsolo ,K (Karabo)	1	555.4	980.4	1	555.4	980.4	0	0	0	0	0	0
9	Vermeulen ,H (Henrico)	1	1	425	1	1	425	0	0	0	0	0	0
9	Vermeulen ,H (Henrico)	1	1155.8	1580.8	1	1141.2	1580.8	0	0	0	0	0	0
10	Mistry ,D (Devak)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Mistry ,D (Devak)	1	1232.3	807.3	1	1221.4	807.3	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

Van Rooyen, JAK (Johan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms