Chess South Africa Ratings Database

PLAYER PAGE

Personal

Pretorius, S (Sonya)

Chess SA id

2090132122

FIDE id

Date of birth

2009-03-02 (U18)

Gender

Female

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-04-22

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1123.7	1172.8	1077.1	1200
Raw rating	1123.7	1172.8	1077.1	1200
Weighted rating	1123.7	1172.8	1077	1200
Weighted performance	515.1	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	184.8	172.4	197.5	165.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1218.7 2020-02-01	1200 2018-10-01
Highest raw rating	1200 2019-12-01	1200 2019-12-01	1200 2019-12-01	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	1218.7 2020-02-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1123.7	1172.8	1077.1	1200
Analysis
Rating	1123.7	1172.8	1077.1	1200
Raw rating	1123.7	1172.8	1077.1	1200
Weighted rating	1123.7	1172.8	1077
Weighted performance	515.1	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	184.8	172.4	197.5	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	1123.7	1172.8	1077.1	1200
New weighted rating	1123.7	1172.8	1077	1200
New weighted performance	514.8	0	0	0
Temp new rating	1123.7	1172.8	1077.1	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1123.7	1172.8	1077.1	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	10	0	10
	0	0	0
	0	0	0
History	26	5	21

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	U18
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 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	26	9.5	36.54	-114.4	1193.7	1079.3
Standard	5	2	40	-85	1166.5	1081.5
Rapid	21	7.5	35.71	-121.4	1200.2	1078.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1123.7	1172.8	1077.1	1200
2025-09-01	1123.7	1172.8	1077.1	1200
2025-08-01	1123.7	1172.8	1077.1	1200
2025-07-01	1123.7	1172.8	1077.1	1200
2025-06-01	1123.7	1172.8	1077.1	1200
2025-05-01	1123.7	1172.8	1077.1	1200
2025-04-01	1123.7	1172.8	1077.1	1200
2025-03-01	1123.7	1172.8	1077.1	1200
2025-02-01	1123.7	1172.8	1077.1	1200
2025-01-01	1123.6	1172.8	1076.8	1200
2024-12-01	1123.6	1172.8	1076.8	1200
2024-11-01	1123.6	1172.8	1076.8	1200
2024-10-01	1123.6	1172.8	1076.8	1200
2024-09-01	1123.6	1172.8	1076.8	1200
2024-08-01	1123.6	1172.8	1076.8	1200
2024-07-01	1123.6	1172.8	1076.8	1200
2024-06-01	1123.6	1172.8	1076.8	1200
2024-08-01	1123.6	1172.8	1076.8	1200
2024-04-01	1123.6	1172.8	1076.8	1200
2024-03-01	1123.6	1172.8	1076.8	1200
2024-02-01	1123.6	1172.8	1076.8	1200
2024-01-01	1123.6	1172.8	1076.8	1200
2023-12-01	1123.6	1172.8	1076.8	1200
2023-11-01	1123.6	1172.8	1076.8	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	Hermanus Rapid 2023 (B)	2023-04-22	2023-04-22	Rapid	Overberg (WOS)	6	5	0	Yes	Analysis
2	Overberg Schools Open Tournament 2023 (U14)	2023-02-11	2023-02-11	Rapid	Overberg (WOS)	5	5	2	Yes	Analysis
3	2020 Western Province Open (Development)	2020-03-07	2020-03-07	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis
4	2020 Welgemoed Chess Challenge (U12)	2020-02-29	2020-02-29	Rapid	Cape Town (WCT)	5	5	3	Yes	Analysis
5	Cape Winelands Schools Trials 1 2020 (U11 Girls)	2020-02-08	2020-02-08	Rapid	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis

#	Games	Start				End
1	2	Tournament 2020 Western Province Open				Tournament 2020 Western Province Open
		date 2020-03-07	rnd 3	type Standard	result 1	date 2020-03-07	rnd 4	type Standard	result 1
		Opponent James, F (Fadwa)				Opponent Lau, Z (Zoe)
2	2	Tournament Cape Winelands Schools Trials 1 2020				Tournament Cape Winelands Schools Trials 1 2020
		date 2020-02-08	rnd 2	type Rapid	result 1	date 2020-02-08	rnd 3	type Rapid	result 0.5
		Opponent May, A (Audrey)				Opponent Bester, M (Milla)
3	1	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg Schools Open Tournament 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-11	rnd 4	type Rapid	result 1
		Opponent Swarts, A (Anesto)				Opponent Swarts, A (Anesto)

#	Games	Start				End
1	2	Tournament 2020 Western Province Open				Tournament 2020 Western Province Open
		date 2020-03-07	rnd 3	type Standard	result 1	date 2020-03-07	rnd 4	type Standard	result 1
		Opponent James, F (Fadwa)				Opponent Lau, Z (Zoe)

#	Games	Start				End
1	2	Tournament 2020 Welgemoed Chess Challenge				Tournament Overberg Schools Open Tournament 2023
		date 2020-02-29	rnd 5	type Rapid	result 1	date 2023-02-11	rnd 1	type Rapid	result 1
		Opponent De Villiers, L (Lienka)				Opponent Sidanga, R (Ronique)
2	2	Tournament Cape Winelands Schools Trials 1 2020				Tournament Cape Winelands Schools Trials 1 2020
		date 2020-02-08	rnd 2	type Rapid	result 1	date 2020-02-08	rnd 3	type Rapid	result 0.5
		Opponent May, A (Audrey)				Opponent Bester, M (Milla)
3	1	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg Schools Open Tournament 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-11	rnd 4	type Rapid	result 1
		Opponent Swarts, A (Anesto)				Opponent Swarts, A (Anesto)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament 2020 Western Province Open				Tournament 2020 Western Province Open
		date 2020-03-07	rnd 3	type Standard	result 1	date 2020-03-07	rnd 4	type Standard	result 1
		Opponent James, F (Fadwa)				Opponent Lau, Z (Zoe)
2	1	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg Schools Open Tournament 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-11	rnd 4	type Rapid	result 1
		Opponent Swarts, A (Anesto)				Opponent Swarts, A (Anesto)
3	1	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg Schools Open Tournament 2023
		date 2023-02-11	rnd 1	type Rapid	result 1	date 2023-02-11	rnd 1	type Rapid	result 1
		Opponent Sidanga, R (Ronique)				Opponent Sidanga, R (Ronique)

#	Games	Start				End
1	2	Tournament 2020 Western Province Open				Tournament 2020 Western Province Open
		date 2020-03-07	rnd 3	type Standard	result 1	date 2020-03-07	rnd 4	type Standard	result 1
		Opponent James, F (Fadwa)				Opponent Lau, Z (Zoe)

#	Games	Start				End
1	2	Tournament 2020 Welgemoed Chess Challenge				Tournament Overberg Schools Open Tournament 2023
		date 2020-02-29	rnd 5	type Rapid	result 1	date 2023-02-11	rnd 1	type Rapid	result 1
		Opponent De Villiers, L (Lienka)				Opponent Sidanga, R (Ronique)
2	1	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg Schools Open Tournament 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-11	rnd 4	type Rapid	result 1
		Opponent Swarts, A (Anesto)				Opponent Swarts, A (Anesto)
3	1	Tournament 2020 Welgemoed Chess Challenge				Tournament 2020 Welgemoed Chess Challenge
		date 2020-02-29	rnd 3	type Rapid	result 1	date 2020-02-29	rnd 3	type Rapid	result 1
		Opponent Daniels, E (Ethan)				Opponent Daniels, E (Ethan)

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	Sreedhar ,S (Samarth)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Sreedhar ,S (Samarth)	1	1215.5	790.5	1	1205.5	790.5	0	0	0	0	0	0
2	James ,F (Fadwa)	1	1	425	1	1	425	0	0	0	0	0	0
2	James ,F (Fadwa)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Mqadi ,O (Olethiwe)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Mqadi ,O (Olethiwe)	1	1086.9	661.9	1	1088.4	661.9	0	0	0	0	0	0
4	Harmse ,A (Andre)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Harmse ,A (Andre)	1	1200	775	1	1200	775	0	0	0	0	0	0
5	Lau ,Z (Zoe)	1	1	425	1	1	425	0	0	0	0	0	0
5	Lau ,Z (Zoe)	1	1130.3	1555.3	1	1115.2	1555.3	0	0	0	0	0	0
6	Siebert ,E (Emily)	1	1	425	0	0	0	1	1	425	0	0	0
6	Siebert ,E (Emily)	1	1090.8	1515.8	0	0	0	1	1174.4	1515.8	0	0	0
7	Daniels ,E (Ethan)	1	1	425	0	0	0	1	1	425	0	0	0
7	Daniels ,E (Ethan)	1	1188.3	1613.3	0	0	0	1	1181.6	1613.3	0	0	0
8	Laurance ,E (Emma)	1	0	-425	0	0	0	1	0	-425	0	0	0
8	Laurance ,E (Emma)	1	1200	775	0	0	0	1	1200	775	0	0	0
9	De Wet ,M (Malcolm)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	De Wet ,M (Malcolm)	1	1344.6	919.6	0	0	0	1	1302.4	919.6	0	0	0
10	May ,A (Audrey)	1	1	425	0	0	0	1	1	425	0	0	0
10	May ,A (Audrey)	1	1048.4	1473.4	0	0	0	1	1104	1473.4	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Pretorius, S (Sonya)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms