Chess South Africa Ratings Database

PLAYER PAGE

Personal

Coba, J (Joshua)

Chess SA id

1060153255

FIDE id

Date of birth

2006-02-21 (U20)

Gender

Male

Region

Buffalo City (EBC)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-04-06

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1193.7	1190	1200	1200
Raw rating	1193.7	1190	1200	1200
Weighted rating	1193.2	1189.5	1200	1200
Weighted performance	0	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	167.3	168.2	165.8	165.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1200 2019-12-01	1200 2019-12-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1200 2019-12-01	1200 2019-12-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1193.7	1190	1200	1200
Analysis
Rating	1193.7	1190	1200	1200
Raw rating	1193.7	1190	1200	1200
Weighted rating	1193.2	1189.5	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	167.3	168.2	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	1193.7	1190	1200	1200
New weighted rating	1193.4	1189.7	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1193.7	1190	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1193.7	1190	1200	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard
	0	0
	0	0
	5	5
	4	4
	0	0
	0	0
History	9	9

Games since
	Main 5	Standard 5		Rapid 0		Blitz 0
Gender	Male
Age group	U20
Region	Buffalo City (EBC)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	9	4	44.44	-47.2	1223	1175.8
Standard	9	4	44.44	-47.2	1223	1175.8
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1193.7	1190	1200	1200
2025-09-30	1193.7	1190	1200	1200
2025-09-01	1193.7	1190	1200	1200
2025-08-01	1193.7	1190	1200	1200
2025-07-01	1193.7	1190	1200	1200
2025-06-01	1193.7	1190	1200	1200
2025-05-01	1193.7	1190	1200	1200
2025-04-01	1193.7	1190	1200	1200
2025-03-01	1193.7	1190	1200	1200
2025-02-01	1193.7	1190	1200	1200
2025-01-01	1193.7	1190	1200	1200
2024-12-01	1193.7	1190	1200	1200
2024-11-01	1193.7	1190	1200	1200
2024-10-01	1193.7	1190	1200	1200
2024-09-01	1193.7	1190	1200	1200
2024-08-01	1193.7	1190	1200	1200
2024-07-01	1193.7	1190	1200	1200
2024-09-01	1193.7	1190	1200	1200
2024-05-01	1193.7	1190	1200	1200
2024-04-01	1184.1	1180.4	1200	1200
2024-03-01	1184.1	1180.4	1200	1200
2024-02-01	1184.1	1180.4	1200	1200
2024-01-01	1184.1	1180.4	1200	1200
2023-12-01	1184.1	1180.4	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	2nd Buffalo City Chess Trials 2024 (High School B)	2024-04-06	2024-04-06	Standard	Buffalo City (EBC)	5	5	2.5	Yes	Analysis
2	3rd Vikings Champs 2023 (U18-Adults)	2023-03-23	2023-03-23	Standard	Buffalo City (EBC)	5	4	1.5	Yes	Analysis

#	Games	Start				End
1	2	Tournament 3rd Vikings Champs 2023				Tournament 3rd Vikings Champs 2023
		date 2023-03-23	rnd 2	type Standard	result 0.5	date 2023-03-23	rnd 3	type Standard	result 1
		Opponent Boateng, M (Merlene)				Opponent Amankwah, C (Ciara)
2	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 5	type Standard	result 0.5	date 2024-04-06	rnd 5	type Standard	result 0.5
		Opponent Ford, S (Simthandile)				Opponent Ford, S (Simthandile)
3	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Matomane, A (Asakhe)				Opponent Matomane, A (Asakhe)

#	Games	Start				End
1	2	Tournament 3rd Vikings Champs 2023				Tournament 3rd Vikings Champs 2023
		date 2023-03-23	rnd 2	type Standard	result 0.5	date 2023-03-23	rnd 3	type Standard	result 1
		Opponent Boateng, M (Merlene)				Opponent Amankwah, C (Ciara)
2	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 5	type Standard	result 0.5	date 2024-04-06	rnd 5	type Standard	result 0.5
		Opponent Ford, S (Simthandile)				Opponent Ford, S (Simthandile)
3	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Matomane, A (Asakhe)				Opponent Matomane, A (Asakhe)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Matomane, A (Asakhe)				Opponent Matomane, A (Asakhe)
2	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 1	type Standard	result 1	date 2024-04-06	rnd 1	type Standard	result 1
		Opponent Ngcenge, Q (Qhayiya)				Opponent Ngcenge, Q (Qhayiya)
3	1	Tournament 3rd Vikings Champs 2023				Tournament 3rd Vikings Champs 2023
		date 2023-03-23	rnd 3	type Standard	result 1	date 2023-03-23	rnd 3	type Standard	result 1
		Opponent Amankwah, C (Ciara)				Opponent Amankwah, C (Ciara)

#	Games	Start				End
1	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Matomane, A (Asakhe)				Opponent Matomane, A (Asakhe)
2	1	Tournament 2nd Buffalo City Chess Trials 2024				Tournament 2nd Buffalo City Chess Trials 2024
		date 2024-04-06	rnd 1	type Standard	result 1	date 2024-04-06	rnd 1	type Standard	result 1
		Opponent Ngcenge, Q (Qhayiya)				Opponent Ngcenge, Q (Qhayiya)
3	1	Tournament 3rd Vikings Champs 2023				Tournament 3rd Vikings Champs 2023
		date 2023-03-23	rnd 3	type Standard	result 1	date 2023-03-23	rnd 3	type Standard	result 1
		Opponent Amankwah, C (Ciara)				Opponent Amankwah, C (Ciara)

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	Ngcenge ,Q (Qhayiya)	1	1	425	1	1	425	0	0	0	0	0	0
1	Ngcenge ,Q (Qhayiya)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
2	Amankwah ,C (Ciara)	1	1	425	1	1	425	0	0	0	0	0	0
2	Amankwah ,C (Ciara)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Qubeka ,S (Simele)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Qubeka ,S (Simele)	1	1251.1	826.1	1	1261.6	826.1	0	0	0	0	0	0
4	Boateng ,M (Merlene)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
4	Boateng ,M (Merlene)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
5	Mxabo ,M (Masonwabe)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Mxabo ,M (Masonwabe)	1	1394.3	969.3	1	1351	969.3	0	0	0	0	0	0
6	One ,L (Lihlumile)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	One ,L (Lihlumile)	1	1161.5	736.5	1	1150.8	736.5	0	0	0	0	0	0
7	Matomane ,A (Asakhe)	1	1	425	1	1	425	0	0	0	0	0	0
7	Matomane ,A (Asakhe)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Ford ,S (Simthandile)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Ford ,S (Simthandile)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
9	Nkasela ,E (Enawe)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Nkasela ,E (Enawe)	1	1200	775	1	1200	775	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

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PLAYER PAGE

Personal

Coba, J (Joshua)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms