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

2025-10-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1286.4	1301.3	1200.2	1200
Raw rating	1286.4	1301.3	1200.2	1200
Weighted rating	1226.5	1231.5	1200.1	1200
Weighted performance	0	0	0	0
Floor	786.4	801.3	700.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	146.6	143.5	165.8	165.8
Highest rating	1286.4 2025-11-30	1301.3 2025-11-30	1200.2 2025-04-01	1200 2024-05-01
Highest raw rating	1286.4 2025-11-30	1301.3 2025-11-30	1200.2 2025-04-01	1200 2024-05-01
Highest weighted rating	1220.5 2025-11-30	1224.5 2025-11-30	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	1286.4	1301.3	1200.2	1200
Analysis
Rating	1286.4	1301.3	1200.2	1200
Raw rating	1286.4	1301.3	1200.2	1200
Weighted rating	1226.5	1231.5	1200.1
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	786.4	801.3	700.2	700
Max/Min rating change allowed	146.6	143.5	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	1286.4	1301.3	1200.2	1200
New weighted rating	1232.2	1238.2	1200.1	1200
New weighted performance	0	0	0	0
Temp new rating	1286.4	1301.3	1200.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1286.4	1301.3	1200.2	1200
New K-factor	36	36	36	36
New floor	786.4	801.3	700.2	700

Item	Main	Standard	Rapid
	0	0	0
	20	16	4
	2	2	0
	0	0	0
	0	0	0
	0	0	0
History	22	18	4

Games since
	Main 22	Standard 18		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	20	11.5	57.5	63.8	1270	1333.7
Standard	16	9.5	59.38	79.7	1259.5	1339.2
Rapid	4	2	50	0	1311.6	1311.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	22	12.5	56.82	58	1266.3	1324.2
Standard	18	10.5	58.33	70.8	1256.2	1327
Rapid	4	2	50	0	1311.6	1311.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1286.4	1301.3	1200.2	1200
2025-11-30	1286.4	1301.3	1200.2	1200
2025-11-01	1241.6	1248.4	1200.2	1200
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
2024-11-01	1199.7	1200	1200	1200
2024-07-01	1199.7	1200	1200	1200
2024-06-01	1199.7	1200	1200	1200
2024-05-01	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

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	JCC St Davids Marist Schools League 2025 (B)	2025-09-08	2025-10-27	Standard	Johannesburg Metro (GJM)	6	3	3	Yes	Analysis
2	UJ @20years Open Chess Championship 2025 (B)	2025-10-18	2025-10-18	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
3	JCC Steyn City High Schools League 2025 (B)	2025-05-07	2025-06-09	Standard	Johannesburg Metro (GJM)	6	4	3	Yes	Analysis
4	JCC - Dainfern Chess League 2025 (A)	2025-02-03	2025-03-17	Standard	Johannesburg Metro (GJM)	6	4	1	Yes	Analysis
5	UJ Scholars 1st Edition 2025 (U19)	2025-03-15	2025-03-15	Rapid	Johannesburg Metro (GJM)	5	4	2	Yes	Analysis
6	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	3	Tournament UJ @20years Open Chess Championship 2025				Tournament UJ @20years Open Chess Championship 2025
		date 2025-10-18	rnd 2	type Standard	result 1	date 2025-10-18	rnd 4	type Standard	result 1
		Opponent Masimula, B (Busisiwe)				Opponent Panday, V (Vibhav)
3	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)

#	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	Wilson ,A (Andrew)	1	1	425	1	1	425	0	0	0	0	0	0
1	Wilson ,A (Andrew)	1	1215.2	1640.2	1	1217.1	1640.2	0	0	0	0	0	0
2	Emeruh ,P (Praise)	1	1	425	1	1	425	0	0	0	0	0	0
2	Emeruh ,P (Praise)	1	1345.8	1770.8	1	1341.5	1770.8	0	0	0	0	0	0
3	Dlamini ,O (Ofentse)	1	1	425	1	1	425	0	0	0	0	0	0
3	Dlamini ,O (Ofentse)	1	1244.4	1669.4	1	1241	1669.4	0	0	0	0	0	0
4	Panday ,V (Vibhav)	1	1	425	1	1	425	0	0	0	0	0	0
4	Panday ,V (Vibhav)	1	1279	1704	1	1267.2	1704	0	0	0	0	0	0
5	Mohlala ,T (Tshepang)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Mohlala ,T (Tshepang)	1	1258.6	833.6	1	1269.4	833.6	0	0	0	0	0	0
6	Ging Shi ,Y (Yu)	1	1	425	1	1	425	0	0	0	0	0	0
6	Ging Shi ,Y (Yu)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Van Heerden ,R (Ryan)	1	1	425	1	1	425	0	0	0	0	0	0
7	Van Heerden ,R (Ryan)	1	1192	1617	1	1190.9	1617	0	0	0	0	0	0
8	Hellman ,D (Daniel)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Hellman ,D (Daniel)	1	1165.8	740.8	1	1159.3	740.8	0	0	0	0	0	0
9	Karedla ,D (Dikshan)	1	1	425	1	1	425	0	0	0	0	0	0
9	Karedla ,D (Dikshan)	1	1199.9	1624.9	1	1199.9	1624.9	0	0	0	0	0	0
10	Tatani ,N (Nandi)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Tatani ,N (Nandi)	1	1200	775	1	1200	775	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