Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oosthuizen, J (Johann)

Chess SA id

182094875

FIDE id

Date of birth

1982-02-10 (Adult)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-01-25

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1195.6	1208.6	1231.8	1157.3
Raw rating	1195.6	1208.6	1231.8	1157.3
Weighted rating	1190	1203.1	1231.5	1157
Weighted performance	725.8	728.4	0	0
Floor	700	708.6	731.8	700
K-factor	36	36	36	36
Min/Max rating change allowed	166.9	163.8	158.5	176.2
Highest rating	1200 2018-02-01	1208.6 2025-02-01	1231.8 2024-02-01	1200 2018-10-01
Highest raw rating	1200 2018-02-01	1208.6 2025-02-01	1231.8 2024-02-01	1200 2018-02-01
Highest weighted rating	1200 2018-02-01	1208.6 2018-02-01	1228.6 2025-08-01	1200 2018-10-01
Highest weighted performance	1200 2018-02-01	1200 2018-02-01	1200 2018-02-01	1200 2018-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1195.6	1208.6	1231.8	1157.3
Analysis
Rating	1195.6	1208.6	1231.8	1157.3
Raw rating	1195.6	1208.6	1231.8	1157.3
Weighted rating	1190	1203.1	1231.5
Weighted performance	725.8	728.4	0
K-factor	36	36	36	36
Floor	700	708.6	731.8	700
Max/Min rating change allowed	166.9	163.8	158.5	176.2
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	1195.6	1208.6	1231.8	1157.3
New weighted rating	1190.8	1203.8	1231.8	1157.3
New weighted performance	721.3	721.1	0	0
Temp new rating	1195.6	1208.6	1231.8	1157.3
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1195.6	1208.6	1231.8	1157.3
New K-factor	36	36	36	36
New floor	700	708.6	731.8	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	5	5	0	0
	0	0	0	0
	5	5	0	0
	0	0	0	0
	0	0	0	0
History	67	37	20	10

Games since
	Main 5	Standard 5		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	5	3	60	85	1177.9	1262.9
Standard	5	3	60	85	1177.9	1262.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	56	24.5	43.75	-53.1	1169	1115.8
Standard	37	18.5	50	0	1144.9	1144.9
Rapid	9	3	33.33	-141.7	1285	1143.3
Blitz	10	3	30	-170	1153.5	983.5

Date	Main	Standard	Rapid	Blitz
2025-11-01	1195.6	1208.6	1231.8	1157.3
2025-09-30	1195.6	1208.6	1231.8	1157.3
2025-09-01	1195.6	1208.6	1231.8	1157.3
2025-08-01	1195.6	1208.6	1231.8	1157.3
2025-07-01	1195.6	1208.6	1231.8	1157.3
2025-06-01	1195.6	1208.6	1231.8	1157.3
2025-05-01	1195.6	1208.6	1231.8	1157.3
2025-04-01	1195.6	1208.6	1231.8	1157.3
2025-03-01	1195.6	1208.6	1231.8	1157.3
2025-02-01	1195.6	1208.6	1231.8	1157.3
2025-01-01	1179.7	1192.8	1231.8	1157.3
2024-12-01	1179.7	1192.8	1231.8	1157.3
2024-11-01	1179.7	1192.8	1231.8	1157.3
2024-10-01	1179.7	1192.8	1231.8	1157.3
2024-09-01	1179.7	1192.8	1231.8	1157.3
2024-08-01	1179.7	1192.8	1231.8	1157.3
2024-07-01	1179.7	1192.8	1231.8	1157.3
2024-09-01	1179.7	1192.8	1231.8	1157.3
2024-05-01	1179.7	1192.8	1231.8	1157.3
2024-04-01	1179.7	1192.8	1231.8	1157.3
2024-03-01	1179.7	1192.8	1231.8	1157.3
2024-02-01	1179.7	1192.8	1231.8	1157.3
2024-01-01	1179.7	1192.8	1231.8	1157.3
2023-12-01	1179.7	1192.8	1137.2	1076.4

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane Chess OPEN Registration Tournament (C)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane Chess OPEN Registration Tournament (C)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	Lardies Open Tournament 2023 (C)	2023-10-28	2023-10-28	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
3	Eureka Chess Open 2019 (C)	2019-07-27	2019-07-27	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
4	2019 SWVG Arnold Classic (Rapid Open)	2019-05-18	2019-05-19	Rapid	Tshwane (GTP)	10	9	3	Yes	Analysis
5	2019 SWVG Arnold Classic (Blitz Open)	2019-05-19	2019-05-19	Blitz	Tshwane (GTP)	10	10	3	Yes	Analysis
6	2019 TuksChess Open (C)	2019-02-23	2019-02-23	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
7	2019 Heidelberg Open (C)	2019-02-02	2019-02-02	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
8	Boksburg Open 2019 (B)	2019-01-19	2019-01-19	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
9	2018 Gauteng North Open (C)	2018-10-20	2018-10-21	Standard	Tshwane (GTP)	5	3	2	Yes	Analysis
10	2018 Alekhine Open (C)	2018-08-09	2018-08-11	Standard	Tshwane (GTP)	6	5	0.5	Yes	Analysis

#	Games	Start				End
1	5	Tournament Eureka Chess Open 2019				Tournament Lardies Open Tournament 2023
		date 2019-07-27	rnd 3	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Bholo, SV (Sicelo Vuyo)				Opponent Buchner, E (Emil)
2	4	Tournament 2019 TuksChess Open				Tournament 2019 TuksChess Open
		date 2019-02-23	rnd 2	type Standard	result 1	date 2019-02-23	rnd 5	type Standard	result 1
		Opponent Jooste, J (Josh)				Opponent Webb, K (Kagan)
3	2	Tournament 2025 Tshwane Chess OPEN Registration Tournament				Tournament 2025 Tshwane Chess OPEN Registration Tournament
		date 2025-01-25	rnd 2	type Standard	result 1	date 2025-01-25	rnd 3	type Standard	result 1
		Opponent Guthikonda, R (Rohan)				Opponent De Klerk, J (Jana)

#	Games	Start				End
1	5	Tournament Eureka Chess Open 2019				Tournament Lardies Open Tournament 2023
		date 2019-07-27	rnd 3	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Bholo, SV (Sicelo Vuyo)				Opponent Buchner, E (Emil)
2	5	Tournament 2019 TuksChess Open				Tournament Eureka Chess Open 2019
		date 2019-02-23	rnd 2	type Standard	result 1	date 2019-07-27	rnd 1	type Standard	result 0.5
		Opponent Jooste, J (Josh)				Opponent Van Zyl, I (Ilane)
3	2	Tournament 2025 Tshwane Chess OPEN Registration Tournament				Tournament 2025 Tshwane Chess OPEN Registration Tournament
		date 2025-01-25	rnd 2	type Standard	result 1	date 2025-01-25	rnd 3	type Standard	result 1
		Opponent Guthikonda, R (Rohan)				Opponent De Klerk, J (Jana)

#	Games	Start				End
1	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 10	type Rapid	result 1	date 2019-05-19	rnd 10	type Rapid	result 1
		Opponent Nyembe, M (Minenhle)				Opponent Nyembe, M (Minenhle)
2	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-18	rnd 5	type Rapid	result 1	date 2019-05-18	rnd 5	type Rapid	result 1
		Opponent Letshwenyo, KE (Kebalepile Edwin)				Opponent Letshwenyo, KE (Kebalepile Edwin)
3	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-18	rnd 3	type Rapid	result 1	date 2019-05-18	rnd 3	type Rapid	result 1
		Opponent Ngubeni, U (Unathi)				Opponent Ngubeni, U (Unathi)

#	Games	Start				End
1	2	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 5	type Blitz	result 1	date 2019-05-19	rnd 6	type Blitz	result 1
		Opponent Crossley-Forest, K (Kyle)				Opponent Ray, L (Liam)
2	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 8	type Blitz	result 1	date 2019-05-19	rnd 8	type Blitz	result 1
		Opponent Mungal, E (Ethan)				Opponent Mungal, E (Ethan)

#	Games	Start				End
1	5	Tournament Eureka Chess Open 2019				Tournament Lardies Open Tournament 2023
		date 2019-07-27	rnd 3	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Bholo, SV (Sicelo Vuyo)				Opponent Buchner, E (Emil)
2	4	Tournament 2019 TuksChess Open				Tournament 2019 TuksChess Open
		date 2019-02-23	rnd 2	type Standard	result 1	date 2019-02-23	rnd 5	type Standard	result 1
		Opponent Jooste, J (Josh)				Opponent Webb, K (Kagan)
3	2	Tournament 2025 Tshwane Chess OPEN Registration Tournament				Tournament 2025 Tshwane Chess OPEN Registration Tournament
		date 2025-01-25	rnd 2	type Standard	result 1	date 2025-01-25	rnd 3	type Standard	result 1
		Opponent Guthikonda, R (Rohan)				Opponent De Klerk, J (Jana)

#	Games	Start				End
1	5	Tournament Eureka Chess Open 2019				Tournament Lardies Open Tournament 2023
		date 2019-07-27	rnd 3	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Bholo, SV (Sicelo Vuyo)				Opponent Buchner, E (Emil)
2	4	Tournament 2019 TuksChess Open				Tournament 2019 TuksChess Open
		date 2019-02-23	rnd 2	type Standard	result 1	date 2019-02-23	rnd 5	type Standard	result 1
		Opponent Jooste, J (Josh)				Opponent Webb, K (Kagan)
3	2	Tournament 2025 Tshwane Chess OPEN Registration Tournament				Tournament 2025 Tshwane Chess OPEN Registration Tournament
		date 2025-01-25	rnd 2	type Standard	result 1	date 2025-01-25	rnd 3	type Standard	result 1
		Opponent Guthikonda, R (Rohan)				Opponent De Klerk, J (Jana)

#	Games	Start				End
1	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 10	type Rapid	result 1	date 2019-05-19	rnd 10	type Rapid	result 1
		Opponent Nyembe, M (Minenhle)				Opponent Nyembe, M (Minenhle)
2	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-18	rnd 5	type Rapid	result 1	date 2019-05-18	rnd 5	type Rapid	result 1
		Opponent Letshwenyo, KE (Kebalepile Edwin)				Opponent Letshwenyo, KE (Kebalepile Edwin)
3	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-18	rnd 3	type Rapid	result 1	date 2019-05-18	rnd 3	type Rapid	result 1
		Opponent Ngubeni, U (Unathi)				Opponent Ngubeni, U (Unathi)

#	Games	Start				End
1	2	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 5	type Blitz	result 1	date 2019-05-19	rnd 6	type Blitz	result 1
		Opponent Crossley-Forest, K (Kyle)				Opponent Ray, L (Liam)
2	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 8	type Blitz	result 1	date 2019-05-19	rnd 8	type Blitz	result 1
		Opponent Mungal, E (Ethan)				Opponent Mungal, E (Ethan)

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	Asiwe ,DK (Daniel Kelechi)	2	0	-425	0	0	0	1	0	-425	1	0	-425
1	Asiwe ,DK (Daniel Kelechi)	2	1400	975	0	0	0	1	1346.2	975	1	1346.2	975
2	Liang ,YX (Yi-Xuan (Bowie))	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Liang ,YX (Yi-Xuan (Bowie))	1	1450.2	1025.2	1	1450.7	1025.2	0	0	0	0	0	0
3	De Wet ,J (James)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	De Wet ,J (James)	1	1153.1	728.1	1	1147.1	728.1	0	0	0	0	0	0
4	Van Zyl ,I (Ilane)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
4	Van Zyl ,I (Ilane)	1	1059.3	1059.3	1	1055.6	1059.3	0	0	0	0	0	0
5	Dube ,B (Brandon)	1	1	425	1	1	425	0	0	0	0	0	0
5	Dube ,B (Brandon)	1	1109.3	1534.3	1	1108.2	1534.3	0	0	0	0	0	0
6	Erasmus ,D (Daniel (Jaco))	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Erasmus ,D (Daniel (Jaco))	1	1265.3	840.3	1	1264.1	840.3	0	0	0	0	0	0
7	Oosthuizen ,JR (John Robert)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Oosthuizen ,JR (John Robert)	1	1007.1	582.1	1	1006.6	582.1	0	0	0	0	0	0
8	Visser ,N (Nico)	1	1	425	1	1	425	0	0	0	0	0	0
8	Visser ,N (Nico)	1	1133.4	1558.4	1	1118.1	1558.4	0	0	0	0	0	0
9	Duvenhage ,LC (Leon Christiaan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Duvenhage ,LC (Leon Christiaan)	1	973.4	973.4	1	972.6	973.4	0	0	0	0	0	0
10	Monteiro ,E (Erich)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Monteiro ,E (Erich)	1	1209	784	1	1211.2	784	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Oosthuizen, J (Johann)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms