Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oosthuizen, J (Josua)

Chess SA id

1170300086

FIDE id

Date of birth

2017-08-03 (U10)

Gender

Male

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-10-18

Personal details last changed

2025-02-24

Junior GPX Games

21.5

Junior GPX Points

1032

Item	Main	Standard	Rapid	Blitz
Rating	1195.9	1204.3	1183.7	1200
Raw rating	1195.2	1204.3	1169.6	1200
Weighted rating	1195.9	1202.9	1183.7	1200
Weighted performance	1101	1062.4	1048.1	0
Floor	707.2	722.4	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	167	164.8	173.1	165.8
Highest rating	1215.7 2024-03-01	1295.2 2024-03-01	1200 2024-03-01	1200 2024-04-01
Highest raw rating	1207.2 2024-04-01	1222.4 2024-04-01	1200 2024-03-01	1200 2024-04-01
Highest weighted rating	1207.2 2024-05-01	1222.4 2024-05-01	1200 2024-03-01	1200 2024-04-01
Highest weighted performance	1215.7 2024-03-01	1295.2 2024-03-01	1200 2024-12-01	1200 2024-04-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.1	0	-1.3	0
New rating	1195.8	1204.3	1182.4	1200
Analysis
Rating	1195.9	1204.3	1183.7	1200
Raw rating	1195.2	1204.3	1169.6	1200
Weighted rating	1195.9	1202.9	1183.7
Weighted performance	1101	1062.4	1048.1
K-factor	36	36	36	36
Floor	707.2	722.4	700	700
Max/Min rating change allowed	167	164.8	173.1	165.8
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	1195.2	1204.3	1169.6	1200
New weighted rating	1195.8	1203	1182.4	1200
New weighted performance	1094.3	1055.5	1041.5	0
Temp new rating	1195.8	1204.3	1182.4	1200
Temp new rating +/-	-0.1	0	-1.3	0
Final new rating +/-	-0.1	0	-1.3	0
New rating	1195.8	1204.3	1182.4	1200
New K-factor	36	36	36	36
New floor	707.2	722.4	700	700

Item	Main	Standard	Rapid
	0	0	0
	33	10	23
	23	18	5
	0	0	0
	0	0	0
	0	0	0
History	56	28	28

Games since
	Main 56	Standard 28		Rapid 28		Blitz 0
Gender	Male
Age group	U10
Region	Overberg (WOS)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	4164		1395		126
Male	3102		984		79
U10	397		135		23
U10 Male	296		96		17
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	1751		866		132
Male	1318		641		83
U10	177		95		26
U10 Male	127		73		22
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 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	33	12	36.36	-115.9	1249.7	1133.8
Standard	10	4	40	-85	1277.4	1192.4
Rapid	23	8	34.78	-129.3	1237.6	1108.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	56	23.5	41.96	-68.3	1221.7	1153.4
Standard	28	13.5	48.21	-15.2	1212.6	1197.4
Rapid	28	10	35.71	-121.4	1230.9	1109.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1195.2	1204.3	1169.6	1200
2025-09-30	1200.8	1204.3	1186.2	1200
2025-09-01	1200.8	1204.3	1186.2	1200
2025-08-01	1195.5	1202.5	1186.2	1200
2025-07-01	1195.5	1202.4	1186.2	1200
2025-06-01	1195.5	1202.4	1186.2	1200
2025-05-01	1195.5	1202.3	1186.2	1200
2025-04-01	1195	1201	1186.2	1200
2025-03-01	1192.3	1203.6	1182.5	1200
2025-02-01	1196.2	1203.6	1187.2	1200
2025-01-01	1195.5	1203.6	1181.6	1200
2024-12-01	1195.5	1203.6	1181.6	1200
2024-11-01	1195.5	1203.6	1181.6	1200
2024-10-01	1195.5	1203.6	1181.6	1200
2024-09-01	1196.4	1204	1181.6	1200
2024-08-01	1196.4	1204	1181.6	1200
2024-07-01	1178.2	1184.2	1181.6	1200
2024-09-01	1178.2	1184.2	1181.6	1200
2024-05-01	1207.2	1222.4	1181.6	1200
2024-04-01	1207.2	1222.4	1181.6	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200

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	Curro Hermanus Spring Open 2025 (U9)	2025-10-18	2025-10-18	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
2	Overberg Top Schools 2025 (U7+U9)	2025-08-02	2025-08-02	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
3	Overberg Schools - PS Closed 2025 (U9 Boys)	2025-03-08	2025-03-08	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
4	Overberg Schools - PS Trials (Region 1) 2025 (U9 Boys)	2025-02-22	2025-02-22	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
5	Curro Hermanus Summer Open 2025 (U9)	2025-02-08	2025-02-08	Rapid	Overberg (WOS)	6	6	3	Yes	Analysis
6	Overberg Schools & Federation Open 2025 (U9)	2025-02-01	2025-02-01	Rapid	Overberg (WOS)	6	5	0.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Curro Hermanus Spring Open 2025 (U9)	2025-10-18	2025-10-18	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
2	Overberg Top Schools 2025 (U7+U9)	2025-08-02	2025-08-02	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
3	Overberg Schools - PS Closed 2025 (U9 Boys)	2025-03-08	2025-03-08	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
4	Overberg Schools - PS Trials (Region 1) 2025 (U9 Boys)	2025-02-22	2025-02-22	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
5	Curro Hermanus Summer Open 2025 (U9)	2025-02-08	2025-02-08	Rapid	Overberg (WOS)	6	6	3	Yes	Analysis
6	Overberg Schools & Federation Open 2025 (U9)	2025-02-01	2025-02-01	Rapid	Overberg (WOS)	6	5	0.5	Yes	Analysis
7	Western Cape Top Schools Championship 2024 (U7 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	5	2	1	Yes	Analysis
8	Overberg Schools - Top Schools 2024 (U7+U9 Mixed)	2024-07-27	2024-07-27	Standard	Overberg (WOS)	5	5	3	Yes	Analysis
9	Western Cape PS Individuals Championship 2024 (U7 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	2.5	Yes	Analysis
10	Overberg Schools - PS Closed 2024 (U7 Mixed)	2024-03-16	2024-03-16	Standard	Overberg (WOS)	5	5	3	Yes	Analysis
11	Overberg Schools - PS Trials Region 3 2024 (U7 Mixed)	2024-03-02	2024-03-02	Rapid	Overberg (WOS)	5	5	2	Yes	Analysis

#	Games	Start				End
1	3	Tournament Overberg Schools - PS Closed 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-03-16	rnd 4	type Standard	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent Dube, Z (Zayne)				Opponent Chumpitaz Avila, J (Jozua)
2	2	Tournament Overberg Top Schools 2025				Tournament Overberg Top Schools 2025
		date 2025-08-02	rnd 2	type Standard	result 0.5	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Schutte, L (Luan)				Opponent Mullins, L (Lucy-May)
3	2	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent De Bod, D (Daniel)				Opponent Jonker, W (William)

#	Games	Start				End
1	3	Tournament Overberg Schools - PS Closed 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-03-16	rnd 4	type Standard	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent Dube, Z (Zayne)				Opponent Chumpitaz Avila, J (Jozua)
2	2	Tournament Overberg Top Schools 2025				Tournament Overberg Top Schools 2025
		date 2025-08-02	rnd 2	type Standard	result 0.5	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Schutte, L (Luan)				Opponent Mullins, L (Lucy-May)
3	2	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent De Bod, D (Daniel)				Opponent Jonker, W (William)

#	Games	Start				End
1	2	Tournament Overberg Schools - PS Trials Region 3 2024				Tournament Overberg Schools - PS Trials Region 3 2024
		date 2024-03-02	rnd 1	type Rapid	result 0.5	date 2024-03-02	rnd 2	type Rapid	result 0.5
		Opponent Harikisun, A (Aaheli)				Opponent Duvenage, H (Hanru)
2	1	Tournament Overberg Schools - PS Trials (Region 1) 2025				Tournament Overberg Schools - PS Trials (Region 1) 2025
		date 2025-02-22	rnd 6	type Rapid	result 0.5	date 2025-02-22	rnd 6	type Rapid	result 0.5
		Opponent Beyers, T (Tatum)				Opponent Beyers, T (Tatum)
3	1	Tournament Overberg Schools - PS Trials (Region 1) 2025				Tournament Overberg Schools - PS Trials (Region 1) 2025
		date 2025-02-22	rnd 4	type Rapid	result 1	date 2025-02-22	rnd 4	type Rapid	result 1
		Opponent Hayes, M (Micah)				Opponent Hayes, M (Micah)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Overberg Schools - PS Closed 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-03-16	rnd 4	type Standard	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent Dube, Z (Zayne)				Opponent Chumpitaz Avila, J (Jozua)
2	2	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent De Bod, D (Daniel)				Opponent Jonker, W (William)
3	2	Tournament Overberg Schools - Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-27	rnd 5	type Standard	result 1	date 2024-08-30	rnd 2	type Standard	result 1
		Opponent Barnard, L (Leanke)				Opponent Filander, B (Brooklyn)

#	Games	Start				End
1	3	Tournament Overberg Schools - PS Closed 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-03-16	rnd 4	type Standard	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent Dube, Z (Zayne)				Opponent Chumpitaz Avila, J (Jozua)
2	2	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent De Bod, D (Daniel)				Opponent Jonker, W (William)
3	2	Tournament Overberg Schools - Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-27	rnd 5	type Standard	result 1	date 2024-08-30	rnd 2	type Standard	result 1
		Opponent Barnard, L (Leanke)				Opponent Filander, B (Brooklyn)

#	Games	Start				End
1	1	Tournament Overberg Schools - PS Trials (Region 1) 2025				Tournament Overberg Schools - PS Trials (Region 1) 2025
		date 2025-02-22	rnd 4	type Rapid	result 1	date 2025-02-22	rnd 4	type Rapid	result 1
		Opponent Hayes, M (Micah)				Opponent Hayes, M (Micah)
2	1	Tournament Overberg Schools - PS Trials (Region 1) 2025				Tournament Overberg Schools - PS Trials (Region 1) 2025
		date 2025-02-22	rnd 2	type Rapid	result 1	date 2025-02-22	rnd 2	type Rapid	result 1
		Opponent Swarts, Z (Zac-Anthony)				Opponent Swarts, Z (Zac-Anthony)
3	1	Tournament Curro Hermanus Summer Open 2025				Tournament Curro Hermanus Summer Open 2025
		date 2025-02-08	rnd 6	type Rapid	result 1	date 2025-02-08	rnd 6	type Rapid	result 1
		Opponent de Villiers, I (Isabelle)				Opponent de Villiers, I (Isabelle)

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	Harikisun ,A (Aaheli)	4	1.5	-106.2	1	1	425	3	0.5	-283.3	0	0	0
1	Harikisun ,A (Aaheli)	4	1187.9	1081.7	1	1200	1612.9	3	1188.4	904.6	0	0	0
2	Lourens ,L (Lihan)	4	0	-425	1	0	-425	3	0	-425	0	0	0
2	Lourens ,L (Lihan)	4	1293.8	868.8	1	1292.6	868.8	3	1289.6	868.8	0	0	0
3	Coetzer ,R (Rossouw)	3	0	-425	1	0	-425	2	0	-425	0	0	0
3	Coetzer ,R (Rossouw)	3	1321.6	896.6	1	1218	896.6	2	1330	896.6	0	0	0
4	Louw ,S (Sarel Johannes)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Louw ,S (Sarel Johannes)	2	1245.1	820.1	2	1198.4	820.1	0	0	0	0	0	0
5	Crafford ,Q (Quade)	2	0	-425	1	0	-425	1	0	-425	0	0	0
5	Crafford ,Q (Quade)	2	1468.4	1043.4	1	1428.3	1043.4	1	1398.3	1043.4	0	0	0
6	Kuhn ,D (Dian)	2	0	-425	1	0	-425	1	0	-425	0	0	0
6	Kuhn ,D (Dian)	2	1268.7	843.7	1	1186.7	843.7	1	1224.4	843.7	0	0	0
7	De Bod ,D (Daniel)	2	1	0	1	1	425	1	0	-425	0	0	0
7	De Bod ,D (Daniel)	2	1232.2	1232.2	1	1200	1657.2	1	1207.6	807.2	0	0	0
8	Sander ,M (Malakai)	2	1.5	212.5	0	0	0	2	1.5	212.5	0	0	0
8	Sander ,M (Malakai)	2	1184.1	1396.6	0	0	0	2	1210.8	1396.6	0	0	0
9	De Bruyn ,N (Nico)	1	1	425	1	1	425	0	0	0	0	0	0
9	De Bruyn ,N (Nico)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
10	Lawa ,V (Veretariki)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Lawa ,V (Veretariki)	1	1204	779	1	1204	779	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 (Josua)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms