Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oosthuizen, J (Jacques)

Chess SA id

1690134066

FIDE id

Date of birth

1969-06-16 (Adult)

Gender

Male

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-13

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1118.8	1107.4	1109.1	1300
Raw rating	1118.8	1107.4	1109.1	1300
Weighted rating	1103.2	1106.9	1060.8	1299
Weighted performance	1055.5	0	1106.6	0
Floor	700	700	700	800
K-factor	36	36	36	36
Min/Max rating change allowed	186.1	189.2	188.7	143.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1240.5 2022-09-01	1300 2024-02-01
Highest raw rating	1200 2019-12-01	1200 2019-12-01	1200 2019-12-01	1300 2024-02-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1296.7 2025-08-01
Highest weighted performance	1200 2019-12-01	1200 2019-12-01	1240.5 2022-09-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1118.8	1107.4	1109.1	1300
Analysis
Rating	1118.8	1107.4	1109.1	1300
Raw rating	1118.8	1107.4	1109.1	1300
Weighted rating	1103.2	1106.9	1060.8
Weighted performance	1055.5	0	1106.6
K-factor	36	36	36	36
Floor	700	700	700	800
Max/Min rating change allowed	186.1	189.2	188.7	143.8
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	1118.8	1107.4	1109.1	1300
New weighted rating	1105.1	1107.2	1065.9	1299.7
New weighted performance	1055.1	0	1106.3	0
Temp new rating	1118.8	1107.4	1109.1	1300
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1118.8	1107.4	1109.1	1300
New K-factor	36	36	36	36
New floor	700	700	700	800

Item	Main	Standard	Rapid
	0	0	0
	24	0	24
	12	0	12
	28	0	28
	10	0	10
	5	5	0
History	79	5	74

Games since
	Main 36	Standard 0		Rapid 36		Blitz 0
Gender	Male
Age group	Adult
Region	Overberg (WOS)
Province	Western Cape (WC)
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	1878		952		146
Male	1405		695		92
Adult	236		88		7
Adult Male	221		84		7
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	24	8.5	35.42	-124	1275.1	1151.1
Standard	0	0	0	0	0	0
Rapid	24	8.5	35.42	-124	1275.1	1151.1
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	79	21.5	27.22	-193.7	1261	1067.4
Standard	5	0	0	-425	949.1	524.1
Rapid	74	21.5	29.05	-178	1282.1	1104.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1118.8	1107.4	1109.1	1300
2025-09-01	1114	1107.4	1098.3	1300
2025-08-01	1120.4	1107.4	1106.5	1300
2025-07-01	1120.4	1107.4	1106.5	1300
2025-06-01	1120.4	1107.4	1106.5	1300
2025-05-01	1120.4	1107.4	1106.5	1300
2025-04-01	1096.1	1107.4	1043.1	1300
2025-03-01	1096.1	1107.4	1043.1	1300
2025-02-01	1100.3	1107.4	1044	1300
2025-01-01	1100.3	1107.4	1044	1300
2024-12-01	1100.3	1107.4	1044	1300
2024-11-01	1100.3	1107.4	1044	1300
2024-10-01	1100.3	1107.4	1044	1300
2024-09-01	1074.8	1107.4	982.4	1300
2024-08-01	1074.8	1107.4	982.4	1300
2024-07-01	1074.8	1107.4	982.4	1300
2024-06-01	1074.8	1107.4	982.4	1300
2024-08-01	1074.8	1107.4	982.4	1300
2024-04-01	1091.9	1107.4	1038.8	1300
2024-03-01	1091.9	1107.4	1038.8	1300
2024-02-01	1091.9	1107.4	1038.8	1300
2024-01-01	1091.9	1107.4	1038.8	1300
2023-12-01	1070.1	1052.4	1038.8	1200
2023-11-01	1070.1	1052.4	1038.8	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	Overberg Club Championship 2025	2025-09-13	2025-09-13	Rapid	Overberg (WOS)	7	6	2	Yes	Analysis
2	Kleinmond Chess Club Open 2025 (Advanced)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
3	Hermanus Chess Club Open 2025 (Development)	2025-04-12	2025-04-12	Rapid	Overberg (WOS)	7	7	3.5	Yes	Analysis
4	Overberg Schools & Federation Open 2025 (Open)	2025-02-01	2025-02-01	Rapid	Overberg (WOS)	6	5	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Overberg Club Championship 2025	2025-09-13	2025-09-13	Rapid	Overberg (WOS)	7	6	2	Yes	Analysis
2	Kleinmond Chess Club Open 2025 (Advanced)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
3	Hermanus Chess Club Open 2025 (Development)	2025-04-12	2025-04-12	Rapid	Overberg (WOS)	7	7	3.5	Yes	Analysis
4	Overberg Schools & Federation Open 2025 (Open)	2025-02-01	2025-02-01	Rapid	Overberg (WOS)	6	5	1	Yes	Analysis
5	Kleinmond Chess Club Open 2024 (Advanced)	2024-09-07	2024-09-07	Rapid	Overberg (WOS)	6	5	2	Yes	Analysis
6	Hermanus Chess Club Open 2024 (Intermediate)	2024-04-20	2024-04-20	Rapid	Overberg (WOS)	7	7	1	Yes	Analysis
7	Overberg Club Championships 2023 (A+B)	2023-07-29	2023-07-29	Rapid	Overberg (WOS)	5	5	1	Yes	Analysis
8	GPCA Rapid 2023 (Advanced)	2023-06-24	2023-06-24	Rapid	Cape Town (WCT)	7	7	1	Yes	Analysis
9	Zwelihle Chess Club Rapid 2023 (A+B)	2023-06-17	2023-06-17	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
10	Hermanus Rapid 2023 (B)	2023-04-22	2023-04-22	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
11	Overberg Schools Open Tournament 2023 (Open)	2023-02-11	2023-02-11	Rapid	Overberg (WOS)	5	4	0	Yes	Analysis
12	Kleinmond Open Tournament 2022 (C)	2022-09-10	2022-09-10	Rapid	Overberg (WOS)	5	5	4	Yes	Analysis
13	OCF Open 2022 (Open)	2022-04-09	2022-04-09	Rapid	Overberg (WOS)	5	5	0	Yes	Analysis
14	Kleinmond Open 2021 (U18+Open)	2021-04-17	2021-04-17	Standard	Overberg (WOS)	5	5	0	Yes	Analysis

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 3	type Rapid	result 1	date 2025-04-12	rnd 4	type Rapid	result 0.5
		Opponent Schrader, D (Deno)				Opponent Geerlings, WGF (Willem)
2	2	Tournament Kleinmond Chess Club Open 2024				Tournament Kleinmond Chess Club Open 2024
		date 2024-09-07	rnd 4	type Rapid	result 1	date 2024-09-07	rnd 5	type Rapid	result 1
		Opponent Linde, M (Morgan)				Opponent Knapp, L (Liam)
3	2	Tournament Kleinmond Open Tournament 2022				Tournament Kleinmond Open Tournament 2022
		date 2022-09-10	rnd 4	type Rapid	result 1	date 2022-09-10	rnd 5	type Rapid	result 1
		Opponent Du Toit, V (Victor)				Opponent Drury, R (Riko)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 3	type Rapid	result 1	date 2025-04-12	rnd 4	type Rapid	result 0.5
		Opponent Schrader, D (Deno)				Opponent Geerlings, WGF (Willem)
2	2	Tournament Kleinmond Chess Club Open 2024				Tournament Kleinmond Chess Club Open 2024
		date 2024-09-07	rnd 4	type Rapid	result 1	date 2024-09-07	rnd 5	type Rapid	result 1
		Opponent Linde, M (Morgan)				Opponent Knapp, L (Liam)
3	2	Tournament Kleinmond Open Tournament 2022				Tournament Kleinmond Open Tournament 2022
		date 2022-09-10	rnd 4	type Rapid	result 1	date 2022-09-10	rnd 5	type Rapid	result 1
		Opponent Du Toit, V (Victor)				Opponent Drury, R (Riko)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Kleinmond Chess Club Open 2024				Tournament Kleinmond Chess Club Open 2024
		date 2024-09-07	rnd 4	type Rapid	result 1	date 2024-09-07	rnd 5	type Rapid	result 1
		Opponent Linde, M (Morgan)				Opponent Knapp, L (Liam)
2	2	Tournament Kleinmond Open Tournament 2022				Tournament Kleinmond Open Tournament 2022
		date 2022-09-10	rnd 4	type Rapid	result 1	date 2022-09-10	rnd 5	type Rapid	result 1
		Opponent Du Toit, V (Victor)				Opponent Drury, R (Riko)
3	2	Tournament Kleinmond Open Tournament 2022				Tournament Kleinmond Open Tournament 2022
		date 2022-09-10	rnd 1	type Rapid	result 1	date 2022-09-10	rnd 2	type Rapid	result 1
		Opponent Linde, M (Morgan)				Opponent Hendricks, L (Lakeisha)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Kleinmond Chess Club Open 2024				Tournament Kleinmond Chess Club Open 2024
		date 2024-09-07	rnd 4	type Rapid	result 1	date 2024-09-07	rnd 5	type Rapid	result 1
		Opponent Linde, M (Morgan)				Opponent Knapp, L (Liam)
2	2	Tournament Kleinmond Open Tournament 2022				Tournament Kleinmond Open Tournament 2022
		date 2022-09-10	rnd 4	type Rapid	result 1	date 2022-09-10	rnd 5	type Rapid	result 1
		Opponent Du Toit, V (Victor)				Opponent Drury, R (Riko)
3	2	Tournament Kleinmond Open Tournament 2022				Tournament Kleinmond Open Tournament 2022
		date 2022-09-10	rnd 1	type Rapid	result 1	date 2022-09-10	rnd 2	type Rapid	result 1
		Opponent Linde, M (Morgan)				Opponent Hendricks, L (Lakeisha)

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	Mackenzie ,T (Tyrol)	2	1	0	0	0	0	2	1	0	0	0	0
1	Mackenzie ,T (Tyrol)	2	1266.1	1266.1	0	0	0	2	1317.7	1266.1	0	0	0
2	Xamsana ,A (Asive)	2	0	-425	0	0	0	2	0	-425	0	0	0
2	Xamsana ,A (Asive)	2	1233.4	808.4	0	0	0	2	1133.3	808.4	0	0	0
3	Hendricks ,L (Lakeisha)	2	2	425	0	0	0	2	2	425	0	0	0
3	Hendricks ,L (Lakeisha)	2	1237.9	1662.9	0	0	0	2	1276.8	1662.9	0	0	0
4	Da Fonseca ,M (Matthew)	2	0	-425	0	0	0	2	0	-425	0	0	0
4	Da Fonseca ,M (Matthew)	2	1298.1	873.1	0	0	0	2	1257.6	873.1	0	0	0
5	Linde ,M (Morgan)	2	2	425	0	0	0	2	2	425	0	0	0
5	Linde ,M (Morgan)	2	1339.5	1764.5	0	0	0	2	1339.4	1764.5	0	0	0
6	Geerlings ,WGF (Willem)	2	0.5	-212.5	0	0	0	2	0.5	-212.5	0	0	0
6	Geerlings ,WGF (Willem)	2	1259.3	1046.8	0	0	0	2	1232.7	1046.8	0	0	0
7	Sonaba ,L (Libhongo)	2	0	-425	0	0	0	2	0	-425	0	0	0
7	Sonaba ,L (Libhongo)	2	1253.3	828.3	0	0	0	2	1302.8	828.3	0	0	0
8	Mfundisi ,M (Mlibo)	2	2	425	0	0	0	2	2	425	0	0	0
8	Mfundisi ,M (Mlibo)	2	1330.6	1755.6	0	0	0	2	1296.2	1755.6	0	0	0
9	Rademeyer ,HP (Herman)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Rademeyer ,HP (Herman)	1	844.4	419.4	1	844.4	419.4	0	0	0	0	0	0
10	Wynand ,P (Phillip)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Wynand ,P (Phillip)	1	564.7	139.7	1	578	139.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Oosthuizen, J (Jacques)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms