Chess South Africa Ratings Database

PLAYER PAGE

Personal

Duwarka, IJ (Ishka Jo-Anne)

Chess SA id

2050118293

FIDE id

Date of birth

2005-07-30 (Adult)

Gender

Female

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-08-19

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1045.9	1021.2	1200	1200
Raw rating	1045.9	1021.2	1200	1200
Weighted rating	1045.3	1020.7	1200	1200
Weighted performance	0	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	206.5	213.9	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 2018-01-01	1200 2018-01-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1200 2018-01-01	1200 2018-01-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1045.9	1021.2	1200	1200
Analysis
Rating	1045.9	1021.2	1200	1200
Raw rating	1045.9	1021.2	1200	1200
Weighted rating	1045.3	1020.7	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	206.5	213.9	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	1045.9	1021.2	1200	1200
New weighted rating	1045.4	1020.7	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1045.9	1021.2	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1045.9	1021.2	1200	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard
	0	0
	0	0
	0	0
	9	9
	9	9
	0	0
History	23	23

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	Adult
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-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	23	5.5	23.91	-221.7	1177.1	955.3
Standard	23	5.5	23.91	-221.7	1177.1	955.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1045.9	1021.2	1200	1200
2025-09-30	1045.9	1021.2	1200	1200
2025-09-01	1045.9	1021.2	1200	1200
2025-08-01	1045.9	1021.2	1200	1200
2025-07-01	1045.9	1021.2	1200	1200
2025-06-01	1045.9	1021.2	1200	1200
2025-05-01	1045.9	1021.2	1200	1200
2025-04-01	1045.9	1021.2	1200	1200
2025-03-01	1045.9	1021.2	1200	1200
2025-02-01	1045.9	1021.2	1200	1200
2025-01-01	1044.3	1019.6	1200	1200
2024-12-01	1044.3	1019.6	1200	1200
2024-11-01	1044.3	1019.6	1200	1200
2024-10-01	1044.3	1019.6	1200	1200
2024-09-01	1044.3	1019.6	1200	1200
2024-08-01	1044.3	1019.6	1200	1200
2024-07-01	1044.3	1019.6	1200	1200
2024-09-01	1044.3	1019.6	1200	1200
2024-05-01	1044.3	1019.6	1200	1200
2024-04-01	1044.3	1019.6	1200	1200
2024-03-01	1044.3	1019.6	1200	1200
2024-02-01	1044.3	1019.6	1200	1200
2024-01-01	1044.3	1019.6	1200	1200
2023-12-01	1044.3	1019.6	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	2023 Gauteng Top Schools (U19 Girls)	2023-08-19	2023-08-19	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
2	Ekurhuleni North High Schools Girls District Team Finals 2023 (U18)	2023-07-22	2023-07-22	Standard	Ekurhuleni (GE)	6	4	0	Yes	Analysis
3	Ekurhuleni North Schools Individual Finals 2023 (U18 Girls)	2023-05-13	2023-05-13	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
4	2022 Gauteng Schools Team Championships (U19 Girls)	2022-08-26	2022-08-26	Standard	Tshwane (GTP)	5	5	0.5	Yes	Analysis
5	Ekurhuleni-North Schools Teams 2022 (U18 Girls)	2022-08-20	2022-08-20	Standard	Ekurhuleni (GE)	5	4	2	Yes	Analysis
6	2019 Gauteng School League Finals (U15 Girls)	2019-08-24	2019-08-24	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis

#	Games	Start				End
1	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 5	type Standard	result 1	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Pikini, E (Esona Oyama)				Opponent Pikini, E (Esona Oyama)
2	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 3	type Standard	result 1	date 2023-08-19	rnd 3	type Standard	result 1
		Opponent Mamarenga, M (Mahlodi)				Opponent Mamarenga, M (Mahlodi)
3	1	Tournament 2022 Gauteng Schools Team Championships				Tournament 2022 Gauteng Schools Team Championships
		date 2022-08-26	rnd 5	type Standard	result 0.5	date 2022-08-26	rnd 5	type Standard	result 0.5
		Opponent Van Der Merwe, S (Simone)				Opponent Van Der Merwe, S (Simone)

#	Games	Start				End
1	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 5	type Standard	result 1	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Pikini, E (Esona Oyama)				Opponent Pikini, E (Esona Oyama)
2	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 3	type Standard	result 1	date 2023-08-19	rnd 3	type Standard	result 1
		Opponent Mamarenga, M (Mahlodi)				Opponent Mamarenga, M (Mahlodi)
3	1	Tournament 2022 Gauteng Schools Team Championships				Tournament 2022 Gauteng Schools Team Championships
		date 2022-08-26	rnd 5	type Standard	result 0.5	date 2022-08-26	rnd 5	type Standard	result 0.5
		Opponent Van Der Merwe, S (Simone)				Opponent Van Der Merwe, S (Simone)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 5	type Standard	result 1	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Pikini, E (Esona Oyama)				Opponent Pikini, E (Esona Oyama)
2	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 3	type Standard	result 1	date 2023-08-19	rnd 3	type Standard	result 1
		Opponent Mamarenga, M (Mahlodi)				Opponent Mamarenga, M (Mahlodi)
3	1	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Ekurhuleni-North Schools Teams 2022
		date 2022-08-20	rnd 4	type Standard	result 1	date 2022-08-20	rnd 4	type Standard	result 1
		Opponent Mapule, M (Miya)				Opponent Mapule, M (Miya)

#	Games	Start				End
1	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 5	type Standard	result 1	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Pikini, E (Esona Oyama)				Opponent Pikini, E (Esona Oyama)
2	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 3	type Standard	result 1	date 2023-08-19	rnd 3	type Standard	result 1
		Opponent Mamarenga, M (Mahlodi)				Opponent Mamarenga, M (Mahlodi)
3	1	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Ekurhuleni-North Schools Teams 2022
		date 2022-08-20	rnd 4	type Standard	result 1	date 2022-08-20	rnd 4	type Standard	result 1
		Opponent Mapule, M (Miya)				Opponent Mapule, M (Miya)

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	De Lange ,C (Charend)	2	0	-425	2	0	-425	0	0	0	0	0	0
1	De Lange ,C (Charend)	2	1037.8	612.8	2	1008.4	612.8	0	0	0	0	0	0
2	Colyn ,D (Daniela)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Colyn ,D (Daniela)	2	1168.4	743.4	2	1133	743.4	0	0	0	0	0	0
3	Mucache ,L (Lira)	1	1	425	1	1	425	0	0	0	0	0	0
3	Mucache ,L (Lira)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Prinsloo ,TE (Thiana Eurika)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Prinsloo ,TE (Thiana Eurika)	1	1388.1	963.1	1	1390.1	963.1	0	0	0	0	0	0
5	Pikini ,E (Esona Oyama)	1	1	425	1	1	425	0	0	0	0	0	0
5	Pikini ,E (Esona Oyama)	1	1135.2	1560.2	1	1121.2	1560.2	0	0	0	0	0	0
6	Kutsoma ,M (Mercy)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Kutsoma ,M (Mercy)	1	1200	775	1	1200	775	0	0	0	0	0	0
7	Maheto ,B (Bokang)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Maheto ,B (Bokang)	1	1200	775	1	1200	775	0	0	0	0	0	0
8	Mabena ,T (Thembekile)	1	1	425	1	1	425	0	0	0	0	0	0
8	Mabena ,T (Thembekile)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Ndlovu ,A (Angel)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Ndlovu ,A (Angel)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Van Der Merwe ,S (Simone)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
10	Van Der Merwe ,S (Simone)	1	1200	1200	1	1200	1200	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

Duwarka, IJ (Ishka Jo-Anne)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms