Chess South Africa Ratings Database

PLAYER PAGE

Personal

Coetzee, J (Jaco)

Chess SA id

105077104

FIDE id

Date of birth

2005-08-13 (Adult)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-05-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1366.3	1363.7	706.8	819.2
Raw rating	1366.3	1363.7	706.8	819.2
Weighted rating	1366.3	1363.7	706.8	819.2
Weighted performance	867.6	864.1	0	0
Floor	876.4	872	500	500
K-factor	36	36	40	40
Min/Max rating change allowed	130.8	131.3	334.8	285.3
Highest rating	1376.4 2020-03-01	1372 2020-03-01	1200 2024-02-01	1200 2018-02-01
Highest raw rating	1376.4 2020-03-01	1372 2020-03-01	706.8 2024-02-01	819.2 2024-02-01
Highest weighted rating	1376.4 2022-02-01	1372 2022-02-01	706.8 2024-11-01	819.2 2024-11-01
Highest weighted performance	1368.6 2020-02-01	1362.7 2020-02-01	1200 2024-02-01	1200 2018-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1366.3	1363.7	706.8	819.2
Analysis
Rating	1366.3	1363.7	706.8	819.2
Raw rating	1366.3	1363.7	706.8	819.2
Weighted rating	1366.3	1363.7	706.8
Weighted performance	867.6	864.1	0
K-factor	36	36	40	40
Floor	876.4	872	500	500
Max/Min rating change allowed	130.8	131.3	334.8	285.3
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	1366.3	1363.7	706.8	819.2
New weighted rating	1366.3	1363.7	706.8	819.2
New weighted performance	859.7	856.3	0	0
Temp new rating	1366.3	1363.7	706.8	819.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1366.3	1363.7	706.8	819.2
New K-factor	36	36	40	40
New floor	876.4	872	500	500

Item	Main	Standard	Blitz
	0	0	0
	0	0	0
	0	0	0
	15	15	0
	4	4	0
	0	0	0
History	260	253	7

Games since
	Main 0	Standard 0		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	148	90	60.81	91.9	1054.1	1145.9
Standard	141	86.5	61.35	96.5	1044.9	1141.3
Rapid	0	0	0	0	0	0
Blitz	7	3.5	50	0	1239.2	1239.2

Date	Main	Standard	Rapid	Blitz
2025-11-01	1366.3	1363.7	706.8	819.2
2025-09-30	1366.3	1363.7	706.8	819.2
2025-09-01	1366.3	1363.7	706.8	819.2
2025-08-01	1366.3	1363.7	706.8	819.2
2025-07-01	1366.3	1363.7	706.8	819.2
2025-06-01	1366.3	1363.7	706.8	819.2
2025-05-01	1366.3	1363.7	706.8	819.2
2025-04-01	1366.3	1363.7	706.8	819.2
2025-03-01	1366.3	1363.7	706.8	819.2
2025-02-01	1366.3	1363.7	706.8	819.2
2025-01-01	1366.3	1363.7	706.8	819.2
2024-12-01	1366.3	1363.7	706.8	819.2
2024-11-01	1366.3	1363.7	706.8	819.2
2024-10-01	1366.3	1363.7	706.8	819.2
2024-09-01	1366.3	1363.7	706.8	819.2
2024-08-01	1366.3	1363.7	706.8	819.2
2024-07-01	1366.3	1363.7	706.8	819.2
2024-09-01	1366.3	1363.7	706.8	819.2
2024-05-01	1366.3	1363.7	706.8	819.2
2024-04-01	1366.3	1363.7	706.8	819.2
2024-03-01	1366.3	1363.7	706.8	819.2
2024-02-01	1366.3	1363.7	706.8	819.2
2024-01-01	1366.3	1363.7	706.8	819.2
2023-12-01	1366.3	1363.7	706.8	819.2

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	Gauteng Schools D7 2023 (U18 Boys)	2023-05-20	2023-05-20	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
2	Gauteng Schools Individual Finals 2023 (U18 Boys)	2023-05-27	2023-05-27	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
3	Heidelberg Open 2023 (B)	2023-02-04	2023-02-04	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
4	Hoerskool Overvaal 2022 (A+B)	2022-06-11	2022-06-11	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
5	Heidelberg Open 2020 (B)	2020-02-01	2020-02-01	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	2019 South African Junior Team Championships (U16C)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	6	Yes	Analysis
7	Sedibeng DF Malherbe Open 2019 (B)	2019-10-12	2019-10-12	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
8	GE vs GSV Inter Regional 2019 (U16B)	2019-10-26	2019-10-26	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
9	Eureka Chess Open 2019 (C)	2019-07-27	2019-07-27	Standard	Sedibeng (GSV)	5	4	2.5	Yes	Analysis
10	Vaal Chess Club Open 2019 (B)	2019-06-01	2019-06-01	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
11	Overvaal Chess Open 2019 (B)	2019-06-15	2019-06-15	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
12	Dirk de Koster Chess Open 2019 (B)	2019-04-13	2019-04-13	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
13	2019 Heidelberg Open (B)	2019-02-02	2019-02-02	Standard	Sedibeng (GSV)	5	5	1.5	Yes	Analysis
14	South African Junior Blitz 2018 (U14)	2018-12-19	2018-12-19	Blitz	4 Knights (4K)	7	7	3.5	Yes	Analysis
15	South African Junior Team Championships 2018 (U14C)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	4.5	Yes	Analysis
16	2018 Interregion Sedibeng vs Ekurhuleni (I)	2018-11-03	2018-11-03	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
17	2018 Sedibeng Summer Open (F)	2018-10-20	2018-10-20	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
18	Eureka Chess Open 2018 (B)	2018-09-29	2018-09-29	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
19	Dr Pieter Hangelbroek Ope 2018 (C)	2018-09-01	2018-09-01	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
20	Broadland`s Knights Chess Open 2018 (B)	2018-06-16	2018-06-16	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
21	2018 Gauteng Secondary Schools Individual Chess Championships (U13 Boys)	2018-05-25	2018-05-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
22	Heidelberg Skaak Klub 2018 (Team 3)	2018-05-05	2018-05-05	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
23	D7 Primary School League 2023 (U13 Boys+Mixed)	2018-04-21	2018-04-21	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
24	Henley Open 2018 (B)	2018-03-10	2018-03-10	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
25	Carels Open 2018 (C)	2018-03-03	2018-03-03	Standard	Sedibeng (GSV)	5	5	4.5	Yes	Analysis
26	D7 Individual 2018 (U13 Boys)	2018-02-24	2018-02-24	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
27	South African Junior Wildcard Championships 2017 (U14 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	7	2	Yes	Analysis
28	South African Junior Team Championships 2017 (U14D)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis

#	Games	Start				End
1	8	Tournament GE vs GSV Inter Regional 2019				Tournament 2019 South African Junior Team Championships
		date 2019-10-26	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Nel, G (Grant)				Opponent Mokoena, T (Thoriso)
2	8	Tournament Carels Open 2018				Tournament Henley Open 2018
		date 2018-03-03	rnd 1	type Standard	result 1	date 2018-03-10	rnd 3	type Standard	result 1
		Opponent Smeeton, J (John)				Opponent Minnaar, JP (Juan)
3	6	Tournament Heidelberg Open 2023				Tournament Gauteng Schools D7 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Mazengeza, T (Tawonaishe)				Opponent Naude, E (Enrique)

#	Games	Start				End
1	8	Tournament GE vs GSV Inter Regional 2019				Tournament 2019 South African Junior Team Championships
		date 2019-10-26	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Nel, G (Grant)				Opponent Mokoena, T (Thoriso)
2	8	Tournament Carels Open 2018				Tournament Henley Open 2018
		date 2018-03-03	rnd 1	type Standard	result 1	date 2018-03-10	rnd 3	type Standard	result 1
		Opponent Smeeton, J (John)				Opponent Minnaar, JP (Juan)
3	6	Tournament Heidelberg Open 2023				Tournament Gauteng Schools D7 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Mazengeza, T (Tawonaishe)				Opponent Naude, E (Enrique)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament South African Junior Blitz 2018				Tournament South African Junior Blitz 2018
		date 2018-12-19	rnd 2	type Blitz	result 1	date 2018-12-19	rnd 5	type Blitz	result 0.5
		Opponent Roets, Z (Zanru)				Opponent Gertenbach, J (Jeandre)

#	Games	Start				End
1	8	Tournament GE vs GSV Inter Regional 2019				Tournament 2019 South African Junior Team Championships
		date 2019-10-26	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Nel, G (Grant)				Opponent Mokoena, T (Thoriso)
2	6	Tournament Heidelberg Open 2023				Tournament Gauteng Schools D7 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Mazengeza, T (Tawonaishe)				Opponent Naude, E (Enrique)
3	6	Tournament Dr Pieter Hangelbroek Ope 2018				Tournament Eureka Chess Open 2018
		date 2018-09-01	rnd 3	type Standard	result 1	date 2018-09-29	rnd 3	type Standard	result 1
		Opponent Naude, J (Jeanre)				Opponent Els, JA (Ja)

#	Games	Start				End
1	8	Tournament GE vs GSV Inter Regional 2019				Tournament 2019 South African Junior Team Championships
		date 2019-10-26	rnd 3	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Nel, G (Grant)				Opponent Mokoena, T (Thoriso)
2	6	Tournament Heidelberg Open 2023				Tournament Gauteng Schools D7 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Mazengeza, T (Tawonaishe)				Opponent Naude, E (Enrique)
3	6	Tournament Dr Pieter Hangelbroek Ope 2018				Tournament Eureka Chess Open 2018
		date 2018-09-01	rnd 3	type Standard	result 1	date 2018-09-29	rnd 3	type Standard	result 1
		Opponent Naude, J (Jeanre)				Opponent Els, JA (Ja)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament South African Junior Blitz 2018				Tournament South African Junior Blitz 2018
		date 2018-12-19	rnd 2	type Blitz	result 1	date 2018-12-19	rnd 4	type Blitz	result 1
		Opponent Roets, Z (Zanru)				Opponent Van Heerden, J (Joshua)

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	Van Der Net ,JM (Jayden)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
1	Van Der Net ,JM (Jayden)	3	1151.9	1151.9	3	1163	1151.9	0	0	0	0	0	0
2	Hanekom ,D (Dylan)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
2	Hanekom ,D (Dylan)	3	743	884.7	3	752.6	884.7	0	0	0	0	0	0
3	Lamont ,M (Michael)	2	1	0	2	1	0	0	0	0	0	0	0
3	Lamont ,M (Michael)	2	956.8	956.8	2	960.5	956.8	0	0	0	0	0	0
4	Rossouw ,R (Rohan)	2	1	0	2	1	0	0	0	0	0	0	0
4	Rossouw ,R (Rohan)	2	1042.2	1042.2	2	1040.4	1042.2	0	0	0	0	0	0
5	Rossouw ,AW (Andreas)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
5	Rossouw ,AW (Andreas)	2	1121.1	1333.6	2	1119.9	1333.6	0	0	0	0	0	0
6	Van Der Mescht ,MJ (Marnus)	2	1	0	2	1	0	0	0	0	0	0	0
6	Van Der Mescht ,MJ (Marnus)	2	1069.6	1069.6	2	1063.9	1069.6	0	0	0	0	0	0
7	Dube ,B (Brandon)	2	2	425	2	2	425	0	0	0	0	0	0
7	Dube ,B (Brandon)	2	897.7	1322.7	2	868.4	1322.7	0	0	0	0	0	0
8	Smeeton ,J (John)	2	2	425	2	2	425	0	0	0	0	0	0
8	Smeeton ,J (John)	2	606	1031	2	607	1031	0	0	0	0	0	0
9	Venter ,J (Jude)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Venter ,J (Jude)	2	1103.8	678.8	2	1105.6	678.8	0	0	0	0	0	0
10	Huisamen ,BB (Botha Brandt)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Huisamen ,BB (Botha Brandt)	2	1215.1	790.1	2	1216.4	790.1	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

Coetzee, J (Jaco)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms