Chess South Africa Ratings Database

PLAYER PAGE

Personal

Coetzee, J (Johan)

Chess SA id

1090153284

FIDE id

Date of birth

2009-02-13 (U18)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-04-13

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1183.5	1176.3	1200	1200
Raw rating	1183.5	1176.3	1200	1200
Weighted rating	1176.6	1168	1200	1200
Weighted performance	0	0	0	0
Floor	746.7	752.6	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	169.8	171.5	165.8	165.8
Highest rating	1357.7 2023-05-01	1351.5 2023-05-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1246.7 2024-03-01	1252.6 2024-03-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1246.7 2024-03-01	1252.6 2024-03-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1357.7 2023-05-01	1351.5 2023-05-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1183.5	1176.3	1200	1200
Analysis
Rating	1183.5	1176.3	1200	1200
Raw rating	1183.5	1176.3	1200	1200
Weighted rating	1176.6	1168	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	746.7	752.6	700	700
Max/Min rating change allowed	169.8	171.5	165.8	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	1183.5	1176.3	1200	1200
New weighted rating	1176.7	1168.1	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1183.5	1176.3	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1183.5	1176.3	1200	1200
New K-factor	36	36	36	36
New floor	746.7	752.6	700	700

Item	Main	Standard
	0	0
	0	0
	10	10
	9	9
	0	0
	0	0
History	19	19

Games since
	Main 10	Standard 10		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	19	8	42.11	-67.1	1208.2	1141.1
Standard	19	8	42.11	-67.1	1208.2	1141.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1183.5	1176.3	1200	1200
2025-09-30	1183.5	1176.3	1200	1200
2025-09-01	1183.5	1176.3	1200	1200
2025-08-01	1183.5	1176.3	1200	1200
2025-07-01	1183.5	1176.3	1200	1200
2025-06-01	1183.5	1176.3	1200	1200
2025-05-01	1183.5	1176.3	1200	1200
2025-04-01	1183.5	1176.3	1200	1200
2025-03-01	1183.5	1176.3	1200	1200
2025-02-01	1182.8	1175.5	1200	1200
2025-01-01	1153.8	1140.6	1200	1200
2024-12-01	1153.8	1140.6	1200	1200
2024-11-01	1153.8	1140.6	1200	1200
2024-10-01	1153.8	1140.6	1200	1200
2024-09-01	1153.8	1140.6	1200	1200
2024-08-01	1153.8	1140.6	1200	1200
2024-07-01	1153.8	1140.6	1200	1200
2024-09-01	1153.8	1140.6	1200	1200
2024-05-01	1153.8	1140.6	1200	1200
2024-04-01	1179.2	1168.7	1200	1200
2024-03-01	1246.7	1252.6	1200	1200
2024-02-01	1246.7	1252.6	1200	1200
2024-01-01	1246.7	1252.6	1200	1200
2023-12-01	1246.7	1252.6	1200	1200

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	Vaalpark Primary Chess Open 2024 (B)	2024-04-13	2024-04-13	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
2	Valia's Open 2024 (B)	2024-03-02	2024-03-02	Standard	Sedibeng (GSV)	5	5	0	Yes	Analysis
3	Valia's Chess Tournament 2023 (C)	2023-05-06	2023-05-06	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
4	Overvaal Open 2023 (C)	2023-04-15	2023-04-15	Standard	Sedibeng (GSV)	5	4	2.5	Yes	Analysis

#	Games	Start				End
1	3	Tournament Overvaal Open 2023				Tournament Valia's Chess Tournament 2023
		date 2023-04-15	rnd 4	type Standard	result 0.5	date 2023-05-06	rnd 2	type Standard	result 0.5
		Opponent Van Der Westhuizen, L (Leighton)				Opponent Davids, A (Anton)
2	2	Tournament Valia's Chess Tournament 2023				Tournament Valia's Chess Tournament 2023
		date 2023-05-06	rnd 4	type Standard	result 1	date 2023-05-06	rnd 5	type Standard	result 1
		Opponent Van Der Westhuizen, J (Janu)				Opponent Mgwevu, K (Kamohelo)
3	2	Tournament Overvaal Open 2023				Tournament Overvaal Open 2023
		date 2023-04-15	rnd 1	type Standard	result 1	date 2023-04-15	rnd 2	type Standard	result 1
		Opponent Komane, N (Naledi-Promise)				Opponent Kovuzela, J (Jabulile)

#	Games	Start				End
1	3	Tournament Overvaal Open 2023				Tournament Valia's Chess Tournament 2023
		date 2023-04-15	rnd 4	type Standard	result 0.5	date 2023-05-06	rnd 2	type Standard	result 0.5
		Opponent Van Der Westhuizen, L (Leighton)				Opponent Davids, A (Anton)
2	2	Tournament Valia's Chess Tournament 2023				Tournament Valia's Chess Tournament 2023
		date 2023-05-06	rnd 4	type Standard	result 1	date 2023-05-06	rnd 5	type Standard	result 1
		Opponent Van Der Westhuizen, J (Janu)				Opponent Mgwevu, K (Kamohelo)
3	2	Tournament Overvaal Open 2023				Tournament Overvaal Open 2023
		date 2023-04-15	rnd 1	type Standard	result 1	date 2023-04-15	rnd 2	type Standard	result 1
		Opponent Komane, N (Naledi-Promise)				Opponent Kovuzela, J (Jabulile)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Valia's Chess Tournament 2023				Tournament Valia's Chess Tournament 2023
		date 2023-05-06	rnd 4	type Standard	result 1	date 2023-05-06	rnd 5	type Standard	result 1
		Opponent Van Der Westhuizen, J (Janu)				Opponent Mgwevu, K (Kamohelo)
2	2	Tournament Overvaal Open 2023				Tournament Overvaal Open 2023
		date 2023-04-15	rnd 1	type Standard	result 1	date 2023-04-15	rnd 2	type Standard	result 1
		Opponent Komane, N (Naledi-Promise)				Opponent Kovuzela, J (Jabulile)
3	1	Tournament Vaalpark Primary Chess Open 2024				Tournament Vaalpark Primary Chess Open 2024
		date 2024-04-13	rnd 4	type Standard	result 1	date 2024-04-13	rnd 4	type Standard	result 1
		Opponent Sieberhagen, N (Nicolaas)				Opponent Sieberhagen, N (Nicolaas)

#	Games	Start				End
1	2	Tournament Valia's Chess Tournament 2023				Tournament Valia's Chess Tournament 2023
		date 2023-05-06	rnd 4	type Standard	result 1	date 2023-05-06	rnd 5	type Standard	result 1
		Opponent Van Der Westhuizen, J (Janu)				Opponent Mgwevu, K (Kamohelo)
2	2	Tournament Overvaal Open 2023				Tournament Overvaal Open 2023
		date 2023-04-15	rnd 1	type Standard	result 1	date 2023-04-15	rnd 2	type Standard	result 1
		Opponent Komane, N (Naledi-Promise)				Opponent Kovuzela, J (Jabulile)
3	1	Tournament Vaalpark Primary Chess Open 2024				Tournament Vaalpark Primary Chess Open 2024
		date 2024-04-13	rnd 4	type Standard	result 1	date 2024-04-13	rnd 4	type Standard	result 1
		Opponent Sieberhagen, N (Nicolaas)				Opponent Sieberhagen, N (Nicolaas)

No games found.

#	Games	Start				End

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	Marimuthu ,S (Shaylen)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Marimuthu ,S (Shaylen)	1	1223.3	798.3	1	1227	798.3	0	0	0	0	0	0
2	Erwee ,M (Wiehan)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Erwee ,M (Wiehan)	1	948.2	523.2	1	964.5	523.2	0	0	0	0	0	0
3	Nhose ,A (Asemahle Zibusele)	1	1	425	1	1	425	0	0	0	0	0	0
3	Nhose ,A (Asemahle Zibusele)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Tolmay ,L (Llewellyn)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Tolmay ,L (Llewellyn)	1	1336.2	911.2	1	1326.8	911.2	0	0	0	0	0	0
5	Venter ,J (James)	1	1	425	1	1	425	0	0	0	0	0	0
5	Venter ,J (James)	1	1171.8	1596.8	1	1169.3	1596.8	0	0	0	0	0	0
6	Motsoari ,K (Keketso)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Motsoari ,K (Keketso)	1	1305.8	880.8	1	1295.7	880.8	0	0	0	0	0	0
7	Van Der Westhuizen ,J (Janu)	1	1	425	1	1	425	0	0	0	0	0	0
7	Van Der Westhuizen ,J (Janu)	1	1252.2	1677.2	1	1258.9	1677.2	0	0	0	0	0	0
8	Van Der Westhuizen ,L (Leighton)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Van Der Westhuizen ,L (Leighton)	1	1199.6	1199.6	1	1198.4	1199.6	0	0	0	0	0	0
9	Davids ,A (Anton)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Davids ,A (Anton)	1	1235.2	1235.2	1	1208.8	1235.2	0	0	0	0	0	0
10	Kemp ,J (Jowan)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Kemp ,J (Jowan)	1	1160.6	735.6	1	1153.9	735.6	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

Coetzee, J (Johan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms