Chess South Africa Ratings Database

PLAYER PAGE

Personal

Crotz, K (Kirsten)

Chess SA id

209084197

FIDE id

Date of birth

2009-10-20 (U18)

Gender

Female

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1407.6	1376.7	1350.5	500
Raw rating	1407.6	1376.7	1350.5	500
Weighted rating	1366.5	1350.5	1294.8	500
Weighted performance	1269.8	1103.8	1120.8	0
Floor	943.2	940.3	850.5	500
K-factor	32	32	36	40
Min/Max rating change allowed	123.4	128.9	133.8	449.5
Highest rating	1447.4 2022-09-01	1447.3 2022-09-01	1350.5 2025-09-01	1200 2024-03-01
Highest raw rating	1443.2 2023-03-01	1440.3 2023-03-01	1350.5 2025-09-01	500 2024-03-01
Highest weighted rating	1443.2 2024-02-01	1440.3 2024-03-01	1286.7 2025-05-05	500 2024-11-01
Highest weighted performance	1447.4 2022-09-01	1447.3 2022-09-01	1260 2020-02-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1407.6	1376.7	1350.5	500
Analysis
Rating	1407.6	1376.7	1350.5	500
Raw rating	1407.6	1376.7	1350.5	500
Weighted rating	1366.5	1350.5	1294.8
Weighted performance	1269.8	1103.8	1120.8
K-factor	32	32	36	40
Floor	943.2	940.3	850.5	500
Max/Min rating change allowed	123.4	128.9	133.8	449.5
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	1407.6	1376.7	1350.5	500
New weighted rating	1370	1352.6	1299.8	500
New weighted performance	1261.7	1096	1112.6	0
Temp new rating	1407.6	1376.7	1350.5	500
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1407.6	1376.7	1350.5	500
New K-factor	32	32	36	40
New floor	943.2	940.3	850.5	500

Item	Main	Standard	Rapid
	0	0	0
	10	5	5
	11	5	6
	26	21	5
	37	32	5
	15	5	10
History	308	209	99

Games since
	Main 21	Standard 10		Rapid 11		Blitz 0
Gender	Female
Age group	U18
Region	Cape Winelands (WCW)
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	10	9	90	340	1217.6	1557.6
Standard	5	4	80	255	1229.3	1484.3
Rapid	5	5	100	425	1205.8	1630.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	277	160	57.76	66	1145.2	1211.1
Standard	189	106.5	56.35	54	1151	1205
Rapid	88	53.5	60.8	91.8	1132.7	1224.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1407.6	1376.7	1350.5	500
2025-09-30	1407.6	1376.7	1350.5	500
2025-09-01	1391.7	1349.2	1350.5	500
2025-08-01	1360.3	1349.2	1278.7	500
2025-07-01	1360.3	1349.2	1278.7	500
2025-06-01	1360.3	1349.2	1278.7	500
2025-05-01	1360.3	1349.2	1278.7	500
2025-04-01	1360.3	1349.2	1278.7	500
2025-03-01	1360.3	1349.2	1278.6	500
2025-02-01	1360.3	1349.2	1278.4	500
2025-01-01	1346.8	1337.6	1277	500
2024-12-01	1346.8	1337.6	1277	500
2024-11-01	1346.8	1337.6	1277	500
2024-10-01	1346.8	1337.6	1277	500
2024-09-01	1346.8	1337.6	1277	500
2024-08-01	1346.8	1337.6	1277	500
2024-07-01	1346.8	1337.6	1277	500
2024-09-01	1346.8	1337.6	1277	500
2024-05-01	1346.8	1337.6	1277	500
2024-04-01	1346.8	1337.6	1277	500
2024-03-01	1372.8	1370.2	1277	500
2024-02-01	1389.5	1370.2	1286.7	500
2024-01-01	1389.5	1370.2	1286.7	500
2023-12-01	1389.5	1370.2	1286.7	500

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	Western Cape Schools - Top Schools 2025 (U17 Girls)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	5	5	4	Yes	Analysis
2	Cape Winelands Top Schools 2025 (U15-U19 Girls)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	5	5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools - Top Schools 2025 (U17 Girls)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	5	5	4	Yes	Analysis
2	Cape Winelands Top Schools 2025 (U15-U19 Girls)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	5	5	Yes	Analysis
3	Cape Winelands Schools - Prestige 2024 (U15 Girls)	2024-03-02	2024-03-02	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
4	Cape Winelands Schools - HS Trials 1 2024 (U15 Girls)	2024-02-17	2024-02-17	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
5	Western Cape Top Schools 2023 (U15 Girls)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
6	CW Top Schools 2023 (U15+U18 Girls)	2023-08-26	2023-08-26	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
7	Western Cape HS Individuals 2023 (U15 Girls)	2023-04-01	2023-04-02	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
8	Cape Winelands Schools Prestige 2023 (U15 Girls)	2023-03-11	2023-03-11	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
9	Cape Winelands Schools Chess - Trials 1 2023 (U15 Girls)	2023-02-25	2023-02-25	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
10	Western Cape Top Schools 2022 (U13 Girls)	2022-09-16	2022-09-17	Standard	Overberg (WOS)	5	5	4	Yes	Analysis
11	Cape Winelands Schools Top Schools 2022 (U13 Girls)	2022-08-27	2022-08-27	Standard	Cape Winelands (WCW)	5	4	4	Yes	Analysis
12	Worcester Primary School League 2022 (U13)	2022-05-21	2022-05-21	Standard	Cape Winelands (WCW)	6	6	6	Yes	Analysis
13	Western Cape Schools 2022 (U13 Girls)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	3.5	Yes	Analysis
14	Cape Winelands Schools 2022 (U13 Girls)	2022-03-12	2022-03-12	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
15	Worcester Schools Trials 2022 (U13 Girls)	2022-02-19	2022-02-19	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
16	Cape Winelands Open 2022 (U14)	2022-02-12	2022-02-13	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
17	Western Cape Schools Championship 2021 (U13 Girls)	2021-10-02	2021-10-02	Rapid	Cape Town (WCT)	5	5	2.5	Yes	Analysis
18	Cape Winelands Schools Closed 2021 (U13 Girls)	2021-09-24	2021-09-24	Rapid	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
19	Kleinmond Open 2021 (U14)	2021-04-17	2021-04-17	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
20	2020 Western Province Open (Prestige)	2020-03-07	2020-03-08	Standard	Cape Town (WCT)	6	6	1	Yes	Analysis
21	2020 Welgemoed Chess Challenge (U12)	2020-02-29	2020-02-29	Rapid	Cape Town (WCT)	5	5	4	Yes	Analysis
22	2020 Cape Of Good Hope Open (Open)	2020-02-21	2020-02-23	Standard	Cape Town (WCT)	6	5	3	Yes	Analysis
23	Cape Winelands Schools Trials 1 2020 (U11 Girls)	2020-02-08	2020-02-08	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
24	2019 Wild Card Chess Championship (U12 Girls)	2020-01-09	2020-01-12	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
25	2019 South African Junior Team Championships (U12 Girls)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	2	Yes	Analysis
26	Western Cape Top Schools 2019 (U11 Girls)	2019-08-31	2019-09-01	Standard	Cape Winelands (WCW)	5	5	5	Yes	Analysis
27	2019 Western Cape Closed Chess Championships (D)	2019-09-21	2019-09-22	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
28	Curro Durbanville Chess Tournament 2019 (Premier)	2019-08-23	2019-08-24	Standard	Cape Town (WCT)	6	6	1	Yes	Analysis
29	2019 WP Youth Open (C)	2019-07-13	2019-07-13	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
30	Cape Winelands Schools - Top Schools 2019 (U11+U13 Girls)	2019-07-27	2019-07-27	Rapid	Cape Winelands (WCW)	5	4	3	Yes	Analysis
31	Imam Haron 50th Commemoration Event Open 2019	2019-06-15	2019-06-15	Rapid	Cape Town (WCT)	7	7	3	Yes	Analysis
32	2019 GPCA Rapid (U14)	2019-06-29	2019-06-29	Rapid	Cape Town (WCT)	7	7	2	Yes	Analysis
33	Western Cape Schools Individuals 2019 (U11 Girls)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	3	Yes	Analysis
34	Steinitz Chess Festival 2019 (C)	2019-04-05	2019-04-07	Standard	Cape Town (WCT)	6	5	3.5	Yes	Analysis
35	Crossroads Open Chess Championship 2019 (C)	2019-04-27	2019-04-28	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
36	Cape Winelands Schools Closed 2019 (U11 Girls)	2019-03-16	2019-03-17	Standard	Cape Winelands (WCW)	7	7	4	Yes	Analysis
37	Welgemoed Chess Challenge 2019 (U12)	2019-02-23	2019-02-23	Rapid	Cape Town (WCT)	5	5	3.5	Yes	Analysis
38	CW Schools Open 2019 (U11 Girls)	2019-02-02	2019-02-02	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
39	Cape of Good Hope Open 2019 (C)	2019-01-25	2019-01-27	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
40	South African Junior Team Championships 2018 (U10 Girls)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	6	4.5	Yes	Analysis
41	Caledon Open 2018 (U8+U10)	2018-09-29	2018-09-29	Standard	Overberg (WOS)	5	5	2.5	Yes	Analysis
42	Western Cape Top Schools 2018 (U9+U11 Girls)	2018-08-25	2018-08-26	Standard	Overberg (WOS)	5	4	1.5	Yes	Analysis
43	Stellenberg Youth Chess Champs 2018 (E)	2018-06-23	2018-06-23	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis
44	Western Cape Schools Individuals 2018 (U9 Girls)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	6	4	Yes	Analysis
45	Inter Regional 2018 (U10 Team)	2018-05-04	2018-05-05	Standard	Frances Baard (NCF)	5	5	1.5	Yes	Analysis
46	Cape Winelands Schools Trials 1 2018 (U9 Girls)	2018-03-03	2018-03-03	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
47	Cape Winelands Schools Prestige 2018 (U9 Girls)	2018-03-24	2018-03-25	Standard	Cape Winelands (WCW)	7	7	5	Yes	Analysis
48	North Boland Trials 2018 (U9 Girls)	2018-02-17	2018-02-17	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
49	2018 Cape of Good Hope Open Chess Championships (U10)	2018-01-27	2018-01-27	Rapid	Cape Town (WCT)	6	6	2	Yes	Analysis
50	South African Junior Team Championships 2017 (U10 Girls)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	4	Yes	Analysis

#	Games	Start				End
1	10	Tournament Cape Winelands Schools - Prestige 2024				Tournament Western Cape Schools - Top Schools 2025
		date 2024-03-02	rnd 4	type Standard	result 1	date 2025-09-06	rnd 3	type Standard	result 1
		Opponent Harmse, T (Taylia)				Opponent Van Rooyen, J (Janel)
2	8	Tournament Western Cape Schools 2022				Tournament Western Cape Top Schools 2022
		date 2022-05-29	rnd 6	type Standard	result 1	date 2022-09-17	rnd 3	type Standard	result 1
		Opponent Chipps, A (Alexa)				Opponent Mbambalala, O (Owam)
3	7	Tournament Cape Winelands Schools Trials 1 2018				Tournament Cape Winelands Schools Prestige 2018
		date 2018-03-03	rnd 3	type Rapid	result 0.5	date 2018-03-24	rnd 3	type Standard	result 1
		Opponent Kirchner, T (Tatum)				Opponent Lombard, Z (Zia)

#	Games	Start				End
1	8	Tournament Western Cape Schools 2022				Tournament Western Cape Top Schools 2022
		date 2022-05-29	rnd 6	type Standard	result 1	date 2022-09-17	rnd 3	type Standard	result 1
		Opponent Chipps, A (Alexa)				Opponent Mbambalala, O (Owam)
2	6	Tournament Worcester Primary School League 2022				Tournament Worcester Primary School League 2022
		date 2022-05-21	rnd 1	type Standard	result 1	date 2022-05-21	rnd 6	type Standard	result 1
		Opponent Ngqabuko, J (Julia)				Opponent Engelbrecht, M (Mikaela)
3	5	Tournament Cape Winelands Schools - Prestige 2024				Tournament Western Cape Schools - Top Schools 2025
		date 2024-03-02	rnd 4	type Standard	result 1	date 2025-09-06	rnd 3	type Standard	result 1
		Opponent Harmse, T (Taylia)				Opponent Van Rooyen, J (Janel)

#	Games	Start				End
1	6	Tournament CW Top Schools 2023				Tournament Cape Winelands Schools - HS Trials 1 2024
		date 2023-08-26	rnd 2	type Rapid	result 1	date 2024-02-17	rnd 2	type Rapid	result 1
		Opponent Arnoldus, M (Marceline)				Opponent Harmse, T (Taylia)
2	5	Tournament Cape Winelands Top Schools 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-23	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 5	type Rapid	result 1
		Opponent Roos, J (Jennifer)				Opponent Herder, J (Jaymiree)
3	5	Tournament 2020 Welgemoed Chess Challenge				Tournament Cape Winelands Schools Closed 2021
		date 2020-02-29	rnd 4	type Rapid	result 1	date 2021-09-24	rnd 3	type Rapid	result 0.5
		Opponent Baker, B (Ben)				Opponent Swartz, K (Kelly)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament Cape Winelands Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-08-23	rnd 1	type Rapid	result 1	date 2025-09-06	rnd 3	type Standard	result 1
		Opponent Roos, J (Jennifer)				Opponent Van Rooyen, J (Janel)
2	8	Tournament Western Cape Schools 2022				Tournament Western Cape Top Schools 2022
		date 2022-05-29	rnd 6	type Standard	result 1	date 2022-09-17	rnd 3	type Standard	result 1
		Opponent Chipps, A (Alexa)				Opponent Mbambalala, O (Owam)
3	6	Tournament Worcester Primary School League 2022				Tournament Worcester Primary School League 2022
		date 2022-05-21	rnd 1	type Standard	result 1	date 2022-05-21	rnd 6	type Standard	result 1
		Opponent Ngqabuko, J (Julia)				Opponent Engelbrecht, M (Mikaela)

#	Games	Start				End
1	8	Tournament Western Cape Schools 2022				Tournament Western Cape Top Schools 2022
		date 2022-05-29	rnd 6	type Standard	result 1	date 2022-09-17	rnd 3	type Standard	result 1
		Opponent Chipps, A (Alexa)				Opponent Mbambalala, O (Owam)
2	6	Tournament Worcester Primary School League 2022				Tournament Worcester Primary School League 2022
		date 2022-05-21	rnd 1	type Standard	result 1	date 2022-05-21	rnd 6	type Standard	result 1
		Opponent Ngqabuko, J (Julia)				Opponent Engelbrecht, M (Mikaela)
3	5	Tournament Western Cape Top Schools 2019				Tournament Western Cape Top Schools 2019
		date 2019-08-31	rnd 1	type Standard	result 1	date 2019-09-01	rnd 5	type Standard	result 1
		Opponent Beukes, K (Kelsey)				Opponent Mqadi, O (Olethiwe)

#	Games	Start				End
1	6	Tournament CW Top Schools 2023				Tournament Cape Winelands Schools - HS Trials 1 2024
		date 2023-08-26	rnd 2	type Rapid	result 1	date 2024-02-17	rnd 2	type Rapid	result 1
		Opponent Arnoldus, M (Marceline)				Opponent Harmse, T (Taylia)
2	5	Tournament Cape Winelands Top Schools 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-23	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 5	type Rapid	result 1
		Opponent Roos, J (Jennifer)				Opponent Herder, J (Jaymiree)
3	4	Tournament 2020 Welgemoed Chess Challenge				Tournament Cape Winelands Schools Closed 2021
		date 2020-02-29	rnd 4	type Rapid	result 1	date 2021-09-24	rnd 2	type Rapid	result 1
		Opponent Baker, B (Ben)				Opponent Jacobs, M (Mishan)

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	Nortje ,D (Dell-Maree)	8	2	-212.5	4	2	0	4	0	-425	0	0	0
1	Nortje ,D (Dell-Maree)	8	1113.8	901.3	4	1058.4	1113.8	4	975.3	688.8	0	0	0
2	Erasmus ,A (Anneke)	6	0.5	-354.2	5	0.5	-340	1	0	-425	0	0	0
2	Erasmus ,A (Anneke)	6	1401	1046.8	5	1345.5	1061	1	1416.4	976	0	0	0
3	Johnson ,L (Lakeisha)	6	1.5	-212.5	2	0.5	-212.5	4	1	-212.5	0	0	0
3	Johnson ,L (Lakeisha)	6	1321.8	1109.3	2	1199.1	1109.3	4	1287.1	1109.3	0	0	0
4	Harmse ,T (Taylia)	4	4	425	3	3	425	1	1	425	0	0	0
4	Harmse ,T (Taylia)	4	1135.8	1560.8	3	1157.9	1560.8	1	1089.2	1560.8	0	0	0
5	Xetu ,A (Abulele)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
5	Xetu ,A (Abulele)	3	1220.7	1362.3	3	1188.7	1362.3	0	0	0	0	0	0
6	Albanie ,A (Anzelle)	3	3	425	3	3	425	0	0	0	0	0	0
6	Albanie ,A (Anzelle)	3	1176.6	1601.6	3	1155	1601.6	0	0	0	0	0	0
7	Maart ,M (Mia)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
7	Maart ,M (Mia)	3	1249.5	1249.5	3	1243.1	1249.5	0	0	0	0	0	0
8	Mbambalala ,O (Owam)	3	3	425	3	3	425	0	0	0	0	0	0
8	Mbambalala ,O (Owam)	3	1213.6	1638.6	3	1219.5	1638.6	0	0	0	0	0	0
9	Van Zyl ,C (Cornelia Aletta)	3	3	425	2	2	425	1	1	425	0	0	0
9	Van Zyl ,C (Cornelia Aletta)	3	1355.4	1780.4	2	1432	1780.4	1	1200	1780.4	0	0	0
10	Engelbrecht ,J (Jane)	3	1.5	0	2	0.5	-212.5	1	1	425	0	0	0
10	Engelbrecht ,J (Jane)	3	1241.1	1241.1	2	1277.2	1028.6	1	1100	1666.1	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Crotz, K (Kirsten)

Ratings

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Last 24 raw ratings

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Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms