Chess South Africa Ratings Database

PLAYER PAGE

Personal

Donora, D (Dereck)

Chess SA id

1090301686

FIDE id

Date of birth

2009-09-25 (U18)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-06-09

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1222.7

Item	Main	Standard	Rapid	Blitz
Rating	1238.6	1246.9	1200.2	1200
Raw rating	1238.6	1246.9	1200.2	1200
Weighted rating	1211.4	1213.9	1200.1	1200
Weighted performance	0	0	0	0
Floor	738.6	746.9	700.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	156.9	155.1	165.8	165.8
Highest rating	1238.6 2025-07-01	1246.9 2025-07-01	1200.2 2025-04-01	1200 2024-05-01
Highest raw rating	1238.6 2025-07-01	1246.9 2025-07-01	1200.2 2025-04-01	1200 2024-05-01
Highest weighted rating	1205.8 2025-08-01	1207.2 2025-08-01	1200.1 2025-08-01	1200 2024-05-01
Highest weighted performance	1220.5 2024-04-01	1225.8 2024-04-01	1200 2024-05-01	1200 2024-05-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1238.6	1246.9	1200.2	1200
Analysis
Rating	1238.6	1246.9	1200.2	1200
Raw rating	1238.6	1246.9	1200.2	1200
Weighted rating	1211.4	1213.9	1200.1
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	738.6	746.9	700.2	700
Max/Min rating change allowed	156.9	155.1	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	1238.6	1246.9	1200.2	1200
New weighted rating	1214	1217.1	1200.1	1200
New weighted performance	0	0	0	0
Temp new rating	1238.6	1246.9	1200.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1238.6	1246.9	1200.2	1200
New K-factor	36	36	36	36
New floor	738.6	746.9	700.2	700

Item	Main	Standard	Rapid
	0	0	0
	12	8	4
	2	2	0
	0	0	0
	0	0	0
	0	0	0
History	14	10	4

Games since
	Main 14	Standard 10		Rapid 4		Blitz 0
Gender	Male
Age group	U18
Region	Johannesburg Metro (GJM)
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	12	6	50	0	1283.5	1283.5
Standard	8	4	50	0	1269.4	1269.4
Rapid	4	2	50	0	1311.6	1311.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	14	7	50	0	1275.8	1275.8
Standard	10	5	50	0	1261.4	1261.4
Rapid	4	2	50	0	1311.6	1311.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1238.6	1246.9	1200.2	1200
2025-09-01	1238.6	1246.9	1200.2	1200
2025-08-01	1238.6	1246.9	1200.2	1200
2025-07-01	1238.6	1246.9	1200.2	1200
2025-06-01	1199.7	1199.8	1200.2	1200
2025-05-01	1199.7	1199.7	1200.2	1200
2025-04-01	1199.4	1198.3	1200.2	1200
2025-03-01	1199.8	1200	1200	1200
2025-02-01	1199.8	1200	1200	1200
2025-01-01	1199.7	1200	1200	1200
2024-12-01	1199.7	1200	1200	1200
2024-11-01	1199.7	1200	1200	1200
2024-10-01	1199.7	1200	1200	1200
2024-09-01	1199.7	1200	1200	1200
2024-08-01	1199.7	1200	1200	1200
2024-07-01	1199.7	1200	1200	1200
2024-06-01	1199.7	1200	1200	1200
2024-08-01	1199.7	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
2023-11-01	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	JCC Steyn City High Schools League 2025 (B)	2025-05-07	2025-06-09	Standard	Johannesburg Metro (GJM)	6	4	3	Yes	Analysis
2	JCC - Dainfern Chess League 2025 (A)	2025-02-03	2025-03-17	Standard	Johannesburg Metro (GJM)	6	4	1	Yes	Analysis
3	UJ Scholars 1st Edition 2025 (U19)	2025-03-15	2025-03-15	Rapid	Johannesburg Metro (GJM)	5	4	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	JCC Steyn City High Schools League 2025 (B)	2025-05-07	2025-06-09	Standard	Johannesburg Metro (GJM)	6	4	3	Yes	Analysis
2	JCC - Dainfern Chess League 2025 (A)	2025-02-03	2025-03-17	Standard	Johannesburg Metro (GJM)	6	4	1	Yes	Analysis
3	UJ Scholars 1st Edition 2025 (U19)	2025-03-15	2025-03-15	Rapid	Johannesburg Metro (GJM)	5	4	2	Yes	Analysis
4	Dainfern College Chess League 2024 (B)	2024-01-29	2024-03-11	Standard	Johannesburg Metro (GJM)	6	2	1	Yes	Analysis

#	Games	Start				End
1	4	Tournament UJ Scholars 1st Edition 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-03-15	rnd 5	type Rapid	result 1	date 2025-05-12	rnd 2	type Standard	result 1
		Opponent Ndawonde, L (Luyanda)				Opponent Karedla, D (Dikshan)
2	1	Tournament JCC Steyn City High Schools League 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-05-26	rnd 4	type Standard	result 1	date 2025-05-26	rnd 4	type Standard	result 1
		Opponent Dlamini, O (Ofentse)				Opponent Dlamini, O (Ofentse)
3	1	Tournament UJ Scholars 1st Edition 2025				Tournament UJ Scholars 1st Edition 2025
		date 2025-03-15	rnd 3	type Rapid	result 1	date 2025-03-15	rnd 3	type Rapid	result 1
		Opponent Muroyiwa, T (Takudzwa)				Opponent Muroyiwa, T (Takudzwa)

#	Games	Start				End
1	3	Tournament JCC - Dainfern Chess League 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-03-17	rnd 6	type Standard	result 1	date 2025-05-12	rnd 2	type Standard	result 1
		Opponent Van Heerden, R (Ryan)				Opponent Karedla, D (Dikshan)
2	1	Tournament JCC Steyn City High Schools League 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-05-26	rnd 4	type Standard	result 1	date 2025-05-26	rnd 4	type Standard	result 1
		Opponent Dlamini, O (Ofentse)				Opponent Dlamini, O (Ofentse)
3	1	Tournament Dainfern College Chess League 2024				Tournament Dainfern College Chess League 2024
		date 2024-02-19	rnd 4	type Standard	result 1	date 2024-02-19	rnd 4	type Standard	result 1
		Opponent Ramabulana, D (Dakalo)				Opponent Ramabulana, D (Dakalo)

#	Games	Start				End
1	1	Tournament UJ Scholars 1st Edition 2025				Tournament UJ Scholars 1st Edition 2025
		date 2025-03-15	rnd 5	type Rapid	result 1	date 2025-03-15	rnd 5	type Rapid	result 1
		Opponent Ndawonde, L (Luyanda)				Opponent Ndawonde, L (Luyanda)
2	1	Tournament UJ Scholars 1st Edition 2025				Tournament UJ Scholars 1st Edition 2025
		date 2025-03-15	rnd 3	type Rapid	result 1	date 2025-03-15	rnd 3	type Rapid	result 1
		Opponent Muroyiwa, T (Takudzwa)				Opponent Muroyiwa, T (Takudzwa)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament UJ Scholars 1st Edition 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-03-15	rnd 5	type Rapid	result 1	date 2025-05-12	rnd 2	type Standard	result 1
		Opponent Ndawonde, L (Luyanda)				Opponent Karedla, D (Dikshan)
2	1	Tournament JCC Steyn City High Schools League 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-05-26	rnd 4	type Standard	result 1	date 2025-05-26	rnd 4	type Standard	result 1
		Opponent Dlamini, O (Ofentse)				Opponent Dlamini, O (Ofentse)
3	1	Tournament UJ Scholars 1st Edition 2025				Tournament UJ Scholars 1st Edition 2025
		date 2025-03-15	rnd 3	type Rapid	result 1	date 2025-03-15	rnd 3	type Rapid	result 1
		Opponent Muroyiwa, T (Takudzwa)				Opponent Muroyiwa, T (Takudzwa)

#	Games	Start				End
1	3	Tournament JCC - Dainfern Chess League 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-03-17	rnd 6	type Standard	result 1	date 2025-05-12	rnd 2	type Standard	result 1
		Opponent Van Heerden, R (Ryan)				Opponent Karedla, D (Dikshan)
2	1	Tournament JCC Steyn City High Schools League 2025				Tournament JCC Steyn City High Schools League 2025
		date 2025-05-26	rnd 4	type Standard	result 1	date 2025-05-26	rnd 4	type Standard	result 1
		Opponent Dlamini, O (Ofentse)				Opponent Dlamini, O (Ofentse)
3	1	Tournament Dainfern College Chess League 2024				Tournament Dainfern College Chess League 2024
		date 2024-02-19	rnd 4	type Standard	result 1	date 2024-02-19	rnd 4	type Standard	result 1
		Opponent Ramabulana, D (Dakalo)				Opponent Ramabulana, D (Dakalo)

#	Games	Start				End
1	1	Tournament UJ Scholars 1st Edition 2025				Tournament UJ Scholars 1st Edition 2025
		date 2025-03-15	rnd 5	type Rapid	result 1	date 2025-03-15	rnd 5	type Rapid	result 1
		Opponent Ndawonde, L (Luyanda)				Opponent Ndawonde, L (Luyanda)
2	1	Tournament UJ Scholars 1st Edition 2025				Tournament UJ Scholars 1st Edition 2025
		date 2025-03-15	rnd 3	type Rapid	result 1	date 2025-03-15	rnd 3	type Rapid	result 1
		Opponent Muroyiwa, T (Takudzwa)				Opponent Muroyiwa, T (Takudzwa)

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	Dlamini ,O (Ofentse)	1	1	425	1	1	425	0	0	0	0	0	0
1	Dlamini ,O (Ofentse)	1	1244.4	1669.4	1	1241	1669.4	0	0	0	0	0	0
2	Karedla ,D (Dikshan)	1	1	425	1	1	425	0	0	0	0	0	0
2	Karedla ,D (Dikshan)	1	1199.9	1624.9	1	1199.9	1624.9	0	0	0	0	0	0
3	Mohlala ,T (Tshepang)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Mohlala ,T (Tshepang)	1	1258.6	833.6	1	1269.4	833.6	0	0	0	0	0	0
4	Van Heerden ,R (Ryan)	1	1	425	1	1	425	0	0	0	0	0	0
4	Van Heerden ,R (Ryan)	1	1192	1617	1	1190.9	1617	0	0	0	0	0	0
5	Hellman ,D (Daniel)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Hellman ,D (Daniel)	1	1165.8	740.8	1	1159.3	740.8	0	0	0	0	0	0
6	Tatani ,N (Nandi)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Tatani ,N (Nandi)	1	1200	775	1	1200	775	0	0	0	0	0	0
7	Ramabulana ,D (Dakalo)	1	1	425	1	1	425	0	0	0	0	0	0
7	Ramabulana ,D (Dakalo)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Shalala ,D (Daniel John)	1	1	425	1	1	425	0	0	0	0	0	0
8	Shalala ,D (Daniel John)	1	1340	1765	1	1351.1	1765	0	0	0	0	0	0
9	Sahdeo ,J (Jashil)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Sahdeo ,J (Jashil)	1	1409.1	984.1	1	1402.4	984.1	0	0	0	0	0	0
10	Felix ,H (Harrison)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Felix ,H (Harrison)	1	1404.4	979.4	1	1411.3	979.4	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

Donora, D (Dereck)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms