Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oosthuizen, JR (John Robert)

Chess SA id

104029045

FIDE id

Date of birth

2004-11-22 (Adult)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-03-06

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1183	1179.8	755.6	742
Raw rating	1183	1179.8	755.6	742
Weighted rating	1183	1179.8	755.6	742
Weighted performance	325	310.9	0	0
Floor	684.9	679.8	500	500
K-factor	40	40	40	40
Min/Max rating change allowed	169.9	170.7	312.3	318.4
Highest rating	1200 2024-11-01	1200 2024-11-01	1200 2019-12-01	1200 2024-03-01
Highest raw rating	1184.9 2020-02-01	1179.8 2024-03-01	755.6 2024-03-01	742 2024-03-01
Highest weighted rating	1184.9 2024-11-01	1179.8 2024-11-01	755.6 2024-11-01	742 2024-11-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2019-12-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1183	1179.8	755.6	742
Analysis
Rating	1183	1179.8	755.6	742
Raw rating	1183	1179.8	755.6	742
Weighted rating	1183	1179.8	755.6
Weighted performance	325	310.9	0
K-factor	40	40	40	40
Floor	684.9	679.8	500	500
Max/Min rating change allowed	169.9	170.7	312.3	318.4
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	1183	1179.8	755.6	742
New weighted rating	1183	1179.8	755.6	742
New weighted performance	318.1	303.9	0	0
Temp new rating	1183	1179.8	755.6	742
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1183	1179.8	755.6	742
New K-factor	40	40	40	40
New floor	684.9	679.8	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	448	433	15

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Tshwane (GTP)
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	98	41	41.84	-69.4	1134.5	1065.1
Standard	94	40	42.55	-63.3	1123.9	1060.6
Rapid	4	1	25	-212.5	1383.5	1171
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1183	1179.8	755.6	742
2025-09-30	1183	1179.8	755.6	742
2025-09-01	1183	1179.8	755.6	742
2025-08-01	1183	1179.8	755.6	742
2025-07-01	1183	1179.8	755.6	742
2025-06-01	1183	1179.8	755.6	742
2025-05-01	1183	1179.8	755.6	742
2025-04-01	1183	1179.8	755.6	742
2025-03-01	1183	1179.8	755.6	742
2025-02-01	1183	1179.8	755.6	742
2025-01-01	1183	1179.8	755.6	742
2024-12-01	1183	1179.8	755.6	742
2024-11-01	1183	1179.8	755.6	742
2024-10-01	1183	1179.8	755.6	742
2024-09-01	1183	1179.8	755.6	742
2024-08-01	1183	1179.8	755.6	742
2024-07-01	1183	1179.8	755.6	742
2024-09-01	1183	1179.8	755.6	742
2024-05-01	1183	1179.8	755.6	742
2024-04-01	1183	1179.8	755.6	742
2024-03-01	1183	1179.8	755.6	742
2024-02-01	1183	1179.8	755.6	742
2024-01-01	1183	1179.8	755.6	742
2023-12-01	1183	1179.8	755.6	742

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	Hoerskool Eldoraigne Rapid 2020	2020-03-06	2020-03-06	Rapid	Chess Excellence (CEX)	5	4	1	Yes	Analysis
2	2020 Registration Tournament (C)	2020-01-25	2020-01-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
3	2019 South African Junior Team Championships (U16C)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
4	2019 Etienne Lewis Trials (U16 Boys)	2019-08-30	2019-09-01	Standard	Tshwane (GTP)	7	6	0	Yes	Analysis
5	2019 Mid-Gauteng Open (C)	2019-08-17	2019-08-17	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
6	2019 Jacaranda Round Robin (I)	2019-08-03	2019-08-03	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
7	2019 D4 Tshwane South Schools League Team Finals (U15)	2019-07-27	2019-07-27	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
8	2019 Chris Greyling (C)	2019-04-27	2019-04-27	Standard	Tshwane (GTP)	5	4	1.5	Yes	Analysis
9	2019 Capablanca Chess Festival (C)	2019-04-19	2019-04-21	Standard	Tshwane (GTP)	7	7	4	Yes	Analysis
10	2019 Tshwane Chess Registration Tournament (C)	2019-01-26	2019-01-26	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
11	South African Junior Team Championships 2018 (U16B)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	2	Yes	Analysis
12	2018 Etienne Lewis Trials (U16 Boys)	2018-08-31	2018-09-02	Standard	Tshwane (GTP)	7	6	1.5	Yes	Analysis
13	2018 Alekhine Open (C)	2018-08-09	2018-08-11	Standard	Tshwane (GTP)	6	6	2.5	Yes	Analysis
14	2018 Swartkop Open (C)	2018-06-23	2018-06-23	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
15	2018 Gauteng Secondary Schools Individual Chess Championships (U15 Boys)	2018-05-26	2018-05-26	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
16	2018 D4 Tshwane North Individual Chess Championships (U15 Boys)	2018-03-10	2018-03-10	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
17	2018 Blou Bul Open (D)	2018-02-17	2018-02-17	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
18	South African Junior Team Championships 2017 (U14D)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	3	Yes	Analysis

#	Games	Start				End
1	4	Tournament 2019 Capablanca Chess Festival				Tournament 2019 Capablanca Chess Festival
		date 2019-04-20	rnd 4	type Standard	result 0.5	date 2019-04-21	rnd 7	type Standard	result 1
		Opponent Lodi, O (Olebogeng)				Opponent Smit, A (Anika)
2	4	Tournament 2018 Blou Bul Open				Tournament 2018 Blou Bul Open
		date 2018-02-17	rnd 1	type Standard	result 1	date 2018-02-17	rnd 4	type Standard	result 1
		Opponent Kleynhans, N (Nelrie)				Opponent Le Roux, C (Claire)
3	3	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent De Villiers, L (Lisa Marie)				Opponent Ntshangase, N (Nkululeko)

#	Games	Start				End
1	4	Tournament 2019 Capablanca Chess Festival				Tournament 2019 Capablanca Chess Festival
		date 2019-04-20	rnd 4	type Standard	result 0.5	date 2019-04-21	rnd 7	type Standard	result 1
		Opponent Lodi, O (Olebogeng)				Opponent Smit, A (Anika)
2	4	Tournament 2018 Blou Bul Open				Tournament 2018 Blou Bul Open
		date 2018-02-17	rnd 1	type Standard	result 1	date 2018-02-17	rnd 4	type Standard	result 1
		Opponent Kleynhans, N (Nelrie)				Opponent Le Roux, C (Claire)
3	3	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent De Villiers, L (Lisa Marie)				Opponent Ntshangase, N (Nkululeko)

#	Games	Start				End
1	1	Tournament Hoerskool Eldoraigne Rapid 2020				Tournament Hoerskool Eldoraigne Rapid 2020
		date 2020-03-06	rnd 4	type Rapid	result 1	date 2020-03-06	rnd 4	type Rapid	result 1
		Opponent Pieters, A (Adriaan)				Opponent Pieters, A (Adriaan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 2018 Blou Bul Open				Tournament 2018 Blou Bul Open
		date 2018-02-17	rnd 1	type Standard	result 1	date 2018-02-17	rnd 4	type Standard	result 1
		Opponent Kleynhans, N (Nelrie)				Opponent Le Roux, C (Claire)
2	3	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent De Villiers, L (Lisa Marie)				Opponent Ntshangase, N (Nkululeko)
3	3	Tournament 2018 D4 Tshwane North Individual Chess Championships				Tournament 2018 D4 Tshwane North Individual Chess Championships
		date 2018-03-10	rnd 2	type Standard	result 1	date 2018-03-10	rnd 4	type Standard	result 1
		Opponent Aspeling, K (Ken)				Opponent Mapheto, O (Onthatile)

#	Games	Start				End
1	4	Tournament 2018 Blou Bul Open				Tournament 2018 Blou Bul Open
		date 2018-02-17	rnd 1	type Standard	result 1	date 2018-02-17	rnd 4	type Standard	result 1
		Opponent Kleynhans, N (Nelrie)				Opponent Le Roux, C (Claire)
2	3	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent De Villiers, L (Lisa Marie)				Opponent Ntshangase, N (Nkululeko)
3	3	Tournament 2018 D4 Tshwane North Individual Chess Championships				Tournament 2018 D4 Tshwane North Individual Chess Championships
		date 2018-03-10	rnd 2	type Standard	result 1	date 2018-03-10	rnd 4	type Standard	result 1
		Opponent Aspeling, K (Ken)				Opponent Mapheto, O (Onthatile)

#	Games	Start				End
1	1	Tournament Hoerskool Eldoraigne Rapid 2020				Tournament Hoerskool Eldoraigne Rapid 2020
		date 2020-03-06	rnd 4	type Rapid	result 1	date 2020-03-06	rnd 4	type Rapid	result 1
		Opponent Pieters, A (Adriaan)				Opponent Pieters, A (Adriaan)

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	Mapheto ,O (Onthatile)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Mapheto ,O (Onthatile)	3	1159.2	1017.5	3	1162.2	1017.5	0	0	0	0	0	0
2	Grunenfelder ,S (Stiaan Bosua)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
2	Grunenfelder ,S (Stiaan Bosua)	2	1129.6	917.1	2	1122.4	917.1	0	0	0	0	0	0
3	Anderson ,AP (Aidan Pierre)	2	1	0	2	1	0	0	0	0	0	0	0
3	Anderson ,AP (Aidan Pierre)	2	996.4	996.4	2	994.1	996.4	0	0	0	0	0	0
4	Slabbert ,ZN (Zander Nicolaas)	2	1	0	2	1	0	0	0	0	0	0	0
4	Slabbert ,ZN (Zander Nicolaas)	2	1316.7	1316.7	2	1304	1316.7	0	0	0	0	0	0
5	Van Rooy ,HF (Herculaas Frederik)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Van Rooy ,HF (Herculaas Frederik)	2	1159.8	734.8	2	1162.4	734.8	0	0	0	0	0	0
6	Le Roux ,C (Claire)	2	1	0	2	1	0	0	0	0	0	0	0
6	Le Roux ,C (Claire)	2	915.2	915.2	2	920.5	915.2	0	0	0	0	0	0
7	Reyneke ,PJ (Pieter Jakobus)	2	0	-425	1	0	-425	1	0	-425	0	0	0
7	Reyneke ,PJ (Pieter Jakobus)	2	1466.8	1041.8	1	1301.4	1041.8	1	1325.5	1041.8	0	0	0
8	Oosthuizen ,J (Johann)	1	1	425	1	1	425	0	0	0	0	0	0
8	Oosthuizen ,J (Johann)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Ristic ,A (Andrej)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Ristic ,A (Andrej)	1	1403.7	978.7	1	1404.9	978.7	0	0	0	0	0	0
10	Luchies ,M (Maria)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Luchies ,M (Maria)	1	1100	675	1	1084.9	675	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

Oosthuizen, JR (John Robert)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms