Chess South Africa Ratings Database

PLAYER PAGE

Personal

John, C (Costa)

Chess SA id

1740310877

FIDE id

Date of birth

1974-09-15 (Adult)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1286.5	1294.2	1200	1200
Raw rating	1286.5	1294.2	1200	1200
Weighted rating	1249.4	1253.3	1200	1200
Weighted performance	0	0	0	0
Floor	786.5	794.2	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	146.6	145	165.8	165.8
Highest rating	1449.2 2024-10-01	1431.8 2024-10-01	1200 2024-09-01	1200 2024-09-01
Highest raw rating	1286.5 2025-11-01	1294.2 2025-11-01	1200 2024-09-01	1200 2024-09-01
Highest weighted rating	1249.4 2025-11-01	1253.3 2025-11-01	1200 2024-09-01	1200 2024-09-01
Highest weighted performance	1449.2 2024-10-01	1431.8 2024-10-01	1200 2024-09-01	1200 2024-09-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1286.5	1294.2	1200	1200
Analysis
Rating	1286.5	1294.2	1200	1200
Raw rating	1286.5	1294.2	1200	1200
Weighted rating	1249.4	1253.3	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	786.5	794.2	700	700
Max/Min rating change allowed	146.6	145	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	1286.5	1294.2	1200	1200
New weighted rating	1253.7	1257.9	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1286.5	1294.2	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1286.5	1294.2	1200	1200
New K-factor	36	36	36	36
New floor	786.5	794.2	700	700

Item	Main	Standard
	0	0
	10	10
	12	12
	0	0
	0	0
	0	0
History	22	22

Games since
	Main 22	Standard 22		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Johannesburg Metro (GJM)
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	10	4.5	45	-42.5	1397.3	1354.8
Standard	10	4.5	45	-42.5	1397.3	1354.8
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	22	9.5	43.18	-58	1408	1350
Standard	22	9.5	43.18	-58	1408	1350
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1286.5	1294.2	1200	1200
2025-09-30	1270.4	1276.5	1200	1200
2025-09-01	1270.4	1276.5	1200	1200
2025-08-01	1270.4	1276.5	1200	1200
2025-07-01	1254.7	1258.5	1200	1200
2025-06-01	1254.7	1258.5	1200	1200
2025-05-01	1254.7	1258.5	1200	1200
2025-04-01	1254.7	1258.5	1200	1200
2025-03-01	1254.7	1258.5	1200	1200
2025-02-01	1254.7	1258.5	1200	1200
2025-01-01	1254.7	1258.5	1200	1200
2024-12-01	1254.7	1258.5	1200	1200
2024-11-01	1254.7	1258.5	1200	1200
2024-10-01	1221.2	1223.6	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	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	Khelo India - Lonehill Chess Academy - 2nd Annual Chess Tournament 2025 (B)	2025-09-27	2025-09-27	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
2	MCA Winter Chill Classic 2025 (Advanced)	2025-07-19	2025-07-19	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Khelo India - Lonehill Chess Academy - 2nd Annual Chess Tournament 2025 (B)	2025-09-27	2025-09-27	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
2	MCA Winter Chill Classic 2025 (Advanced)	2025-07-19	2025-07-19	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis
3	CPH Boksburg Open 2024 (B)	2024-10-26	2024-10-26	Standard	Ekurhuleni (GE)	5	2	0	Yes	Analysis
4	Bojanala's Battle of Mount Cambridge 2024 (Rooks)	2024-10-05	2024-10-05	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
5	JCC Khelo India 1st Annual Chess Tournament 2024 (B)	2024-08-31	2024-08-31	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis

#	Games	Start				End
1	2	Tournament Khelo India - Lonehill Chess Academy - 2nd Annual Chess Tournament 2025				Tournament Khelo India - Lonehill Chess Academy - 2nd Annual Chess Tournament 2025
		date 2025-09-27	rnd 4	type Standard	result 1	date 2025-09-27	rnd 5	type Standard	result 1
		Opponent Jiana, N (Nkosinathi)				Opponent Mavhungu, W (Wanga)
2	2	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-19	rnd 4	type Standard	result 0.5
		Opponent Akker, D (Dylan)				Opponent Adamson, LJ (Luke Jonathan)
3	2	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 4	type Standard	result 1	date 2024-10-05	rnd 5	type Standard	result 1
		Opponent Monare, O (Oratilwe)				Opponent Van Zyl, A (Albertus Petrus)

#	Games	Start				End
1	2	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-19	rnd 4	type Standard	result 0.5
		Opponent Akker, D (Dylan)				Opponent Adamson, LJ (Luke Jonathan)
2	2	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 4	type Standard	result 1	date 2024-10-05	rnd 5	type Standard	result 1
		Opponent Monare, O (Oratilwe)				Opponent Van Zyl, A (Albertus Petrus)
3	1	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 2	type Standard	result 1	date 2024-10-05	rnd 2	type Standard	result 1
		Opponent Ramaboa, T (Thando)				Opponent Ramaboa, T (Thando)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 4	type Standard	result 1	date 2024-10-05	rnd 5	type Standard	result 1
		Opponent Monare, O (Oratilwe)				Opponent Van Zyl, A (Albertus Petrus)
2	1	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-19	rnd 3	type Standard	result 1
		Opponent Akker, D (Dylan)				Opponent Akker, D (Dylan)
3	1	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 2	type Standard	result 1	date 2024-10-05	rnd 2	type Standard	result 1
		Opponent Ramaboa, T (Thando)				Opponent Ramaboa, T (Thando)

#	Games	Start				End
1	2	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 4	type Standard	result 1	date 2024-10-05	rnd 5	type Standard	result 1
		Opponent Monare, O (Oratilwe)				Opponent Van Zyl, A (Albertus Petrus)
2	1	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-19	rnd 3	type Standard	result 1
		Opponent Akker, D (Dylan)				Opponent Akker, D (Dylan)
3	1	Tournament Bojanala's Battle of Mount Cambridge 2024				Tournament Bojanala's Battle of Mount Cambridge 2024
		date 2024-10-05	rnd 2	type Standard	result 1	date 2024-10-05	rnd 2	type Standard	result 1
		Opponent Ramaboa, T (Thando)				Opponent Ramaboa, T (Thando)

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	Mankena ,S (Satvik Ram)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Mankena ,S (Satvik Ram)	1	1437.2	1012.2	1	1413	1012.2	0	0	0	0	0	0
2	Bijker ,W (Waldo)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Bijker ,W (Waldo)	1	1473	1048	1	1470.4	1048	0	0	0	0	0	0
3	Monare ,O (Oratilwe)	1	1	425	1	1	425	0	0	0	0	0	0
3	Monare ,O (Oratilwe)	1	1366.2	1791.2	1	1288.8	1791.2	0	0	0	0	0	0
4	Lebese ,K (Kamogelo)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Lebese ,K (Kamogelo)	1	1186.9	761.9	1	1185.9	761.9	0	0	0	0	0	0
5	Van Zyl ,A (Albertus Petrus)	1	1	425	1	1	425	0	0	0	0	0	0
5	Van Zyl ,A (Albertus Petrus)	1	1586.9	2011.9	1	1585.8	2011.9	0	0	0	0	0	0
6	Ramaboa ,T (Thando)	1	1	425	1	1	425	0	0	0	0	0	0
6	Ramaboa ,T (Thando)	1	1317	1742	1	1296.1	1742	0	0	0	0	0	0
7	Jiana ,N (Nkosinathi)	1	1	425	1	1	425	0	0	0	0	0	0
7	Jiana ,N (Nkosinathi)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Adamson ,LJ (Luke Jonathan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Adamson ,LJ (Luke Jonathan)	1	1541.7	1541.7	1	1551.5	1541.7	0	0	0	0	0	0
9	Gudladona ,KP (Kartikeya Praneeth)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Gudladona ,KP (Kartikeya Praneeth)	1	1407.5	982.5	1	1408.2	982.5	0	0	0	0	0	0
10	Mavhungu ,W (Wanga)	1	1	425	1	1	425	0	0	0	0	0	0
10	Mavhungu ,W (Wanga)	1	1243.2	1668.2	1	1244	1668.2	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

John, C (Costa)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms