Chess South Africa Ratings Database

PLAYER PAGE

Personal

Slippers, S (Sonja)

Chess SA id

270035050

FIDE id

Date of birth

1970-01-29 (Adult)

Gender

Female

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2022-07-17

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1267.8	1255.4	1292.6	1177.4
Raw rating	1267.8	1255.4	1292.6	1177.4
Weighted rating	1267.8	1255.4	1292.5	1177.2
Weighted performance	307.6	273.6	0	0
Floor	796.2	785.3	792.6	760.9
K-factor	36	36	36	36
Min/Max rating change allowed	150.5	153.2	145.3	171.2
Highest rating	1296.2 2019-12-01	1285.3 2019-12-01	1354.1 2019-10-01	1260.9 2018-02-01
Highest raw rating	1296.2 2019-12-01	1285.3 2019-12-01	1292.6 2024-03-01	1260.9 2018-02-01
Highest weighted rating	1296.2 2021-10-01	1285.3 2021-10-01	1292.2 2025-08-01	1260.9 2018-02-01
Highest weighted performance	1285.3 2019-10-01	1250.7 2019-10-01	1354.1 2019-10-01	1200 2018-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1267.8	1255.4	1292.6	1177.4
Analysis
Rating	1267.8	1255.4	1292.6	1177.4
Raw rating	1267.8	1255.4	1292.6	1177.4
Weighted rating	1267.8	1255.4	1292.5
Weighted performance	307.6	273.6	0
K-factor	36	36	36	36
Floor	796.2	785.3	792.6	760.9
Max/Min rating change allowed	150.5	153.2	145.3	171.2
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	1267.8	1255.4	1292.6	1177.4
New weighted rating	1267.8	1255.4	1292.6	1177.4
New weighted performance	300.1	266.1	0	0
Temp new rating	1267.8	1255.4	1292.6	1177.4
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1267.8	1255.4	1292.6	1177.4
New K-factor	36	36	36	36
New floor	796.2	785.3	792.6	760.9

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	7	7	0	0
	0	0	0	0
History	192	178	5	9

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	Adult
Region	West Coast (WCU)
Province	Western Cape (WC)
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	96	45	46.88	-26.6	1230.4	1203.8
Standard	82	41	50	0	1203.1	1203.1
Rapid	5	3.5	70	170	1203.5	1373.5
Blitz	9	0.5	5.56	-377.8	1493.9	1116.1

Date	Main	Standard	Rapid	Blitz
2025-11-01	1267.8	1255.4	1292.6	1177.4
2025-09-30	1267.8	1255.4	1292.6	1177.4
2025-09-01	1267.8	1255.4	1292.6	1177.4
2025-08-01	1267.8	1255.4	1292.6	1177.4
2025-07-01	1267.8	1255.4	1292.6	1177.4
2025-06-01	1267.8	1255.4	1292.6	1177.4
2025-05-01	1267.8	1255.4	1292.6	1177.4
2025-04-01	1267.8	1255.4	1292.6	1177.4
2025-03-01	1267.8	1255.4	1292.6	1177.4
2025-02-01	1267.8	1255.4	1292.6	1177.4
2025-01-01	1267.8	1255.4	1292.6	1177.4
2024-12-01	1267.8	1255.4	1292.6	1177.4
2024-11-01	1267.8	1255.4	1292.6	1177.4
2024-10-01	1267.8	1255.4	1292.6	1177.4
2024-09-01	1267.8	1255.4	1292.6	1177.4
2024-08-01	1267.8	1255.4	1292.6	1177.4
2024-07-01	1267.8	1255.4	1292.6	1177.4
2024-09-01	1267.8	1255.4	1292.6	1177.4
2024-05-01	1267.8	1255.4	1292.6	1177.4
2024-04-01	1267.8	1255.4	1292.6	1177.4
2024-03-01	1267.8	1255.4	1292.6	1177.4
2024-02-01	1267.8	1255.4	1292.6	1177.4
2024-01-01	1267.8	1255.4	1292.6	1177.4
2023-12-01	1267.8	1255.4	1280.3	1137.1

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	Western Cape Inter Regional 2023 (Blitz)	2023-03-17	2023-03-17	Blitz	Eden (WEG)	5	0	0	No	Analysis
2	South African Open 2022 (B)	2022-07-09	2022-07-17	Standard	Cape Town (WCT)	11	7	2	Yes	Analysis
3	SAPS WC Chess Club Rapid 2019 (Ladies)	2019-10-21	2019-10-21	Rapid	Frances Baard (NCF)	5	5	3.5	Yes	Analysis
4	SAPS National Individual Chess Championship 2019 (Women)	2019-10-23	2019-10-25	Standard	Frances Baard (NCF)	9	9	5.5	Yes	Analysis
5	SAPS National Team Chess Championship 2019	2019-10-26	2019-10-30	Standard	Frances Baard (NCF)	9	9	7	Yes	Analysis
6	South African Open Chess Championships 2019 (B)	2019-06-15	2019-06-22	Standard	Frances Baard (NCF)	9	9	4	Yes	Analysis
7	South African Open Chess Championships 2019 (Blitz)	2019-06-19	2019-06-19	Blitz	Frances Baard (NCF)	9	9	0.5	Yes	Analysis
8	SAPS National Individual Championship 2018 (Women)	2018-09-12	2018-09-15	Standard	Xhariep (FXT)	9	9	5.5	Yes	Analysis
9	SAPS National Team Championship 2018	2018-09-11	2018-09-11	Standard	Xhariep (FXT)	9	9	4	Yes	Analysis
10	Courteney Page 2018 (Ladies)	2018-09-07	2018-09-08	Standard	Mangaung (FMB)	5	5	3	Yes	Analysis
11	Free State Open 2018 (A)	2018-08-17	2018-08-18	Standard	Mangaung (FMB)	6	6	2	Yes	Analysis
12	South African Open 2018 (B)	2018-07-07	2018-07-14	Standard	Mangaung (FMB)	11	11	4	Yes	Analysis
13	Mangaung Metro Chess 9 - 10 March 2018 (A)	2018-03-09	2018-03-10	Standard	Mangaung (FMB)	5	5	3	Yes	Analysis
14	Mangaung Metro Chess 2 & 3 February 2018 (A)	2018-02-02	2018-02-03	Standard	Mangaung (FMB)	5	3	1	Yes	Analysis

#	Games	Start				End
1	6	Tournament SAPS WC Chess Club Rapid 2019				Tournament SAPS National Individual Chess Championship 2019
		date 2019-10-21	rnd 2	type Rapid	result 0.5	date 2019-10-23	rnd 2	type Standard	result 1
		Opponent Sithole, N (Nontobeko)				Opponent Ledwaba, RR (Ramagohlo)
2	5	Tournament SAPS National Individual Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-25	rnd 8	type Standard	result 0.5	date 2019-10-26	rnd 3	type Standard	result 1
		Opponent Moguru, NW (Nkang)				Opponent Devnanen, K (Sony)
3	4	Tournament SAPS National Individual Championship 2018				Tournament SAPS National Individual Championship 2018
		date 2018-09-13	rnd 4	type Standard	result 0.5	date 2018-09-14	rnd 7	type Standard	result 0.5
		Opponent Lephoto, P (Precious Ntebo)				Opponent Smith, R (R)

#	Games	Start				End
1	5	Tournament SAPS National Individual Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-25	rnd 8	type Standard	result 0.5	date 2019-10-26	rnd 3	type Standard	result 1
		Opponent Moguru, NW (Nkang)				Opponent Devnanen, K (Sony)
2	4	Tournament SAPS National Individual Championship 2018				Tournament SAPS National Individual Championship 2018
		date 2018-09-13	rnd 4	type Standard	result 0.5	date 2018-09-14	rnd 7	type Standard	result 0.5
		Opponent Lephoto, P (Precious Ntebo)				Opponent Smith, R (R)
3	3	Tournament SAPS National Team Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-28	rnd 5	type Standard	result 1	date 2019-10-28	rnd 7	type Standard	result 1
		Opponent Moreothata, L (Lily)				Opponent Ramolobeng, M (Manare Monica)

#	Games	Start				End
1	4	Tournament SAPS WC Chess Club Rapid 2019				Tournament SAPS WC Chess Club Rapid 2019
		date 2019-10-21	rnd 2	type Rapid	result 0.5	date 2019-10-21	rnd 5	type Rapid	result 1
		Opponent Sithole, N (Nontobeko)				Opponent Mcmurtrie, B (Bonnie-Jean)

#	Games	Start				End
1	1	Tournament South African Open Chess Championships 2019				Tournament South African Open Chess Championships 2019
		date 2019-06-19	rnd 7	type Blitz	result 0.5	date 2019-06-19	rnd 7	type Blitz	result 0.5
		Opponent Steyn, PJ (Petrus)				Opponent Steyn, PJ (Petrus)

#	Games	Start				End
1	5	Tournament SAPS WC Chess Club Rapid 2019				Tournament SAPS National Individual Chess Championship 2019
		date 2019-10-21	rnd 3	type Rapid	result 1	date 2019-10-23	rnd 2	type Standard	result 1
		Opponent Jurgens, C (C)				Opponent Ledwaba, RR (Ramagohlo)
2	4	Tournament SAPS National Individual Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-25	rnd 9	type Standard	result 1	date 2019-10-26	rnd 3	type Standard	result 1
		Opponent Atties, CS (Clodene Suzette)				Opponent Devnanen, K (Sony)
3	3	Tournament SAPS National Team Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-28	rnd 5	type Standard	result 1	date 2019-10-28	rnd 7	type Standard	result 1
		Opponent Moreothata, L (Lily)				Opponent Ramolobeng, M (Manare Monica)

#	Games	Start				End
1	4	Tournament SAPS National Individual Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-25	rnd 9	type Standard	result 1	date 2019-10-26	rnd 3	type Standard	result 1
		Opponent Atties, CS (Clodene Suzette)				Opponent Devnanen, K (Sony)
2	3	Tournament SAPS National Team Chess Championship 2019				Tournament SAPS National Team Chess Championship 2019
		date 2019-10-28	rnd 5	type Standard	result 1	date 2019-10-28	rnd 7	type Standard	result 1
		Opponent Moreothata, L (Lily)				Opponent Ramolobeng, M (Manare Monica)
3	3	Tournament SAPS National Team Championship 2018				Tournament SAPS National Team Championship 2018
		date 2018-09-11	rnd 1	type Standard	result 1	date 2018-09-11	rnd 3	type Standard	result 1
		Opponent Vuma, N (Nqn)				Opponent Khangale, L (Livhuwani)

#	Games	Start				End
1	3	Tournament SAPS WC Chess Club Rapid 2019				Tournament SAPS WC Chess Club Rapid 2019
		date 2019-10-21	rnd 3	type Rapid	result 1	date 2019-10-21	rnd 5	type Rapid	result 1
		Opponent Jurgens, C (C)				Opponent Mcmurtrie, B (Bonnie-Jean)

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	Taunyane ,LM (Lerato)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
1	Taunyane ,LM (Lerato)	4	1011.3	905	4	1013.8	905	0	0	0	0	0	0
2	Masilo ,KM (Kediemetse)	4	1	-212.5	3	1	-141.7	0	0	0	1	0	-425
2	Masilo ,KM (Kediemetse)	4	1311.1	1098.6	3	1319.9	1169.4	0	0	0	1	1370.2	886.1
3	Mitani ,P (Portia)	3	3	425	3	3	425	0	0	0	0	0	0
3	Mitani ,P (Portia)	3	1195.1	1620.1	3	1194.9	1620.1	0	0	0	0	0	0
4	Ramolobeng ,M (Manare Monica)	2	2	425	2	2	425	0	0	0	0	0	0
4	Ramolobeng ,M (Manare Monica)	2	1122.3	1547.3	2	1106.4	1547.3	0	0	0	0	0	0
5	Buchner ,E (Eduard)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
5	Buchner ,E (Eduard)	2	1229.1	1016.6	2	1235.3	1016.6	0	0	0	0	0	0
6	Taunyane ,NL (Ntitle Lucia)	2	1	0	2	1	0	0	0	0	0	0	0
6	Taunyane ,NL (Ntitle Lucia)	2	1049.6	1049.6	2	1061.4	1049.6	0	0	0	0	0	0
7	Ledwaba ,RR (Ramagohlo Refilwe)	2	2	425	2	2	425	0	0	0	0	0	0
7	Ledwaba ,RR (Ramagohlo Refilwe)	2	1108.7	1533.7	2	1122	1533.7	0	0	0	0	0	0
8	Goosen ,P (Pierre)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Goosen ,P (Pierre)	2	1259.7	834.7	2	1259.4	834.7	0	0	0	0	0	0
9	Makamu ,NM (Nkhesani)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Makamu ,NM (Nkhesani)	2	1052	627	2	1051.8	627	0	0	0	0	0	0
10	Choane ,MM (Mmone)	2	1	0	2	1	0	0	0	0	0	0	0
10	Choane ,MM (Mmone)	2	1160.8	1160.8	2	1161.9	1160.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Slippers, S (Sonja)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms