Chess South Africa Ratings Database

PLAYER PAGE

Personal

Roos, A (Aleza)

Chess SA id

209085017

FIDE id

Date of birth

2009-01-28 (U18)

Gender

Female

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-10-13

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1206.6	1111.8	1215.9	600
Raw rating	1206	1111.4	1215.9	600
Weighted rating	1206.6	1111.8	1214.1	600
Weighted performance	939.7	817.7	869	0
Floor	722.2	624.6	715.9	500
K-factor	36	40	36	40
Min/Max rating change allowed	164.4	188.1	162.1	389.8
Highest rating	1222.2 2024-04-01	1200 2024-11-01	1215.9 2024-03-01	1200 2024-03-01
Highest raw rating	1222.2 2024-04-01	1124.6 2024-04-01	1215.9 2024-03-01	600 2024-03-01
Highest weighted rating	1222.2 2024-10-01	1124.6 2024-11-01	1212.2 2025-08-01	600 2024-11-01
Highest weighted performance	1216.3 2022-05-01	1200 2024-12-01	1200 2018-02-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.1	0.1	0	0
New rating	1206.7	1111.9	1215.9	600
Analysis
Rating	1206.6	1111.8	1215.9	600
Raw rating	1206	1111.4	1215.9	600
Weighted rating	1206.6	1111.8	1214.1
Weighted performance	939.7	817.7	869
K-factor	36	40	36	40
Floor	722.2	624.6	715.9	500
Max/Min rating change allowed	164.4	188.1	162.1	389.8
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	1206	1111.4	1215.9	600
New weighted rating	1206.7	1111.9	1214.8	600
New weighted performance	939.3	817.3	868.5	0
Temp new rating	1206.7	1111.9	1215.9	600
Temp new rating +/-	0.1	0.1	0	0
Final new rating +/-	0.1	0.1	0	0
New rating	1206.7	1111.9	1215.9	600
New K-factor	36	40	36	40
New floor	722.2	624.6	715.9	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	16	10	6
	5	0	5
	27	11	16
	0	0	0
History	179	111	68

Games since
	Main 16	Standard 10		Rapid 6		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	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	142	56	39.44	-89.8	1136.2	1046.4
Standard	90	29	32.22	-151.1	1114	962.9
Rapid	52	27	51.92	16.3	1174.7	1191
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1206	1111.4	1215.9	600
2025-09-01	1206	1111.4	1215.9	600
2025-08-01	1206	1111.4	1215.9	600
2025-07-01	1205.6	1111.1	1215.9	600
2025-06-01	1205.2	1110.8	1215.9	600
2025-05-01	1204.8	1110.5	1215.9	600
2025-04-01	1204.3	1110.1	1215.9	600
2025-03-01	1203.9	1109.6	1215.9	600
2025-02-01	1203	1108.9	1215.9	600
2025-01-01	1196.2	1104.2	1215.9	600
2024-12-01	1196.2	1104.2	1215.9	600
2024-11-01	1196.2	1104.2	1215.9	600
2024-10-01	1222.2	1124.6	1215.9	600
2024-09-01	1222.2	1124.6	1215.9	600
2024-08-01	1222.2	1124.6	1215.9	600
2024-07-01	1222.2	1124.6	1215.9	600
2024-06-01	1222.2	1124.6	1215.9	600
2024-08-01	1222.2	1124.6	1215.9	600
2024-04-01	1222.2	1124.6	1215.9	600
2024-03-01	1215	1093	1215.9	600
2024-02-01	1174.6	1093	1163.1	600
2024-01-01	1174.6	1093	1163.1	600
2023-12-01	1174.6	1093	1163.1	600
2023-11-01	1174.6	1093	1163.1	600

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	UCT Open Chess Championship 2024 (Intermediate)	2024-10-12	2024-10-13	Standard	Cape Town (WCT)	6	5	1	Yes	Analysis
2	Cape Winelands Schools - Prestige 2024 (U15 Girls)	2024-03-02	2024-03-02	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
3	Cape Winelands Schools - HS Trials 1 2024 (U15 Girls)	2024-02-17	2024-02-17	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
4	Western Cape Closed Championship 2023 (U16)	2023-09-23	2023-09-23	Rapid	Cape Town (WCT)	6	5	1	Yes	Analysis
5	Stellenbosch Primary 2022 (U13)	2022-08-13	2022-08-13	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
6	Western Cape Schools 2022 (U13 Girls)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis
7	Rhenish Primary Tournament 2022 (U14)	2022-05-14	2022-05-14	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
8	Cape Winelands Schools 2022 (U13 Girls)	2022-03-12	2022-03-12	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
9	Central Winelands Schools Individual Trials 2022 (U13 Girls)	2022-02-19	2022-02-19	Rapid	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
10	OCF Chess Tournament 2 2020 (U12)	2020-02-01	2020-02-01	Standard	Overberg (WOS)	5	5	2.5	Yes	Analysis
11	Cape Winelands Schools Trials 1 2020 (U11 Girls)	2020-02-08	2020-02-08	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
12	2019 South African Junior Team Championships (U12 Girls)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	2	Yes	Analysis
13	Western Cape Top Schools 2019 (U11 Mix)	2019-08-31	2019-09-01	Standard	Cape Winelands (WCW)	5	3	0	Yes	Analysis
14	Cape Winelands Schools - Top Schools 2019 (U11 Mix)	2019-07-27	2019-07-27	Rapid	Cape Winelands (WCW)	5	3	2	Yes	Analysis
15	Stellenberg Youth Chess Championship 2019 (B)	2019-04-30	2019-05-01	Standard	Cape Town (WCT)	6	5	0	Yes	Analysis
16	Western Cape Schools Individuals 2019 (U11 Girls)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	2.5	Yes	Analysis
17	Steinitz Chess Festival 2019 (C)	2019-04-05	2019-04-07	Standard	Cape Town (WCT)	6	2	0	Yes	Analysis
18	Cape Winelands Open 2019 (U12)	2019-04-27	2019-04-27	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
19	Cape Winelands Schools Closed 2019 (U11 Girls)	2019-03-16	2019-03-17	Standard	Cape Winelands (WCW)	7	7	3.5	Yes	Analysis
20	CW Schools Open 2019 (U11 Girls)	2019-02-02	2019-02-02	Rapid	Cape Winelands (WCW)	6	6	3.5	Yes	Analysis
21	Cape Winelands Schools Chess - Top Schools 2018 (U9+U11 Mix)	2018-07-28	2018-07-28	Rapid	Cape Winelands (WCW)	5	4	0	Yes	Analysis
22	Stellenberg Youth Chess Champs 2018 (C)	2018-06-22	2018-06-23	Standard	Cape Town (WCT)	6	6	0	Yes	Analysis
23	Western Cape Schools Individuals 2018 (U9 Girls)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	5	2	Yes	Analysis
24	Crossroads Open Chess Championship 2018 (C)	2018-04-27	2018-04-29	Standard	Cape Town (WCT)	6	5	1	Yes	Analysis
25	Cape Winelands Schools Trials 1 2018 (U9 Girls)	2018-03-03	2018-03-03	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
26	Cape Winelands Schools Prestige 2018 (U9 Girls)	2018-03-24	2018-03-25	Standard	Cape Winelands (WCW)	7	7	4.5	Yes	Analysis
27	South African Junior Team Championships 2017 (U10D)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	1	Yes	Analysis

#	Games	Start				End
1	8	Tournament CW Schools Open 2019				Tournament Cape Winelands Schools Closed 2019
		date 2019-02-02	rnd 3	type Rapid	result 0.5	date 2019-03-16	rnd 4	type Standard	result 1
		Opponent Burger, S (Suzanne)				Opponent Buis, J (Joane)
2	4	Tournament Cape Winelands Schools - HS Trials 1 2024				Tournament Cape Winelands Schools - Prestige 2024
		date 2024-02-17	rnd 4	type Rapid	result 1	date 2024-03-02	rnd 1	type Standard	result 1
		Opponent Van Kerwel, Z (Zailey)				Opponent Ntlahla, A (Anathi)
3	3	Tournament Stellenbosch Primary 2022				Tournament Stellenbosch Primary 2022
		date 2022-08-13	rnd 3	type Rapid	result 1	date 2022-08-13	rnd 5	type Rapid	result 1
		Opponent Du Plessis, M (Madelein)				Opponent Maart, M (Mia)

#	Games	Start				End
1	4	Tournament Cape Winelands Schools Closed 2019				Tournament Cape Winelands Schools Closed 2019
		date 2019-03-16	rnd 1	type Standard	result 0.5	date 2019-03-16	rnd 4	type Standard	result 1
		Opponent Steenkamp, K (Kristen)				Opponent Buis, J (Joane)
2	3	Tournament OCF Chess Tournament 2 2020				Tournament OCF Chess Tournament 2 2020
		date 2020-02-01	rnd 2	type Standard	result 0.5	date 2020-02-01	rnd 4	type Standard	result 1
		Opponent Bekker, A (Armin)				Opponent Bekker, A (Angelica)
3	3	Tournament Cape Winelands Schools Prestige 2018				Tournament Cape Winelands Schools Prestige 2018
		date 2018-03-24	rnd 1	type Standard	result 1	date 2018-03-24	rnd 3	type Standard	result 1
		Opponent Ndyundya, K (Khanya)				Opponent Ntlahla, A (Anathi)

#	Games	Start				End
1	4	Tournament Central Winelands Schools Individual Trials 2022				Tournament Rhenish Primary Tournament 2022
		date 2022-02-19	rnd 4	type Rapid	result 0.5	date 2022-05-14	rnd 2	type Rapid	result 1
		Opponent Booysen, K (Kayden)				Opponent Coetsee, E (Ewaldt)
2	4	Tournament CW Schools Open 2019				Tournament CW Schools Open 2019
		date 2019-02-02	rnd 3	type Rapid	result 0.5	date 2019-02-02	rnd 6	type Rapid	result 1
		Opponent Burger, S (Suzanne)				Opponent Steenkamp, K (Kristen)
3	3	Tournament Cape Winelands Schools - HS Trials 1 2024				Tournament Cape Winelands Schools - HS Trials 1 2024
		date 2024-02-17	rnd 4	type Rapid	result 1	date 2024-02-17	rnd 6	type Rapid	result 1
		Opponent Van Kerwel, Z (Zailey)				Opponent Cloete, Z (Zoe)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Cape Winelands Schools - HS Trials 1 2024				Tournament Cape Winelands Schools - Prestige 2024
		date 2024-02-17	rnd 4	type Rapid	result 1	date 2024-03-02	rnd 1	type Standard	result 1
		Opponent Van Kerwel, Z (Zailey)				Opponent Ntlahla, A (Anathi)
2	3	Tournament Stellenbosch Primary 2022				Tournament Stellenbosch Primary 2022
		date 2022-08-13	rnd 3	type Rapid	result 1	date 2022-08-13	rnd 5	type Rapid	result 1
		Opponent Du Plessis, M (Madelein)				Opponent Maart, M (Mia)
3	3	Tournament Cape Winelands Schools Trials 1 2020				Tournament Central Winelands Schools Individual Trials 2022
		date 2020-02-08	rnd 6	type Rapid	result 1	date 2022-02-19	rnd 2	type Rapid	result 1
		Opponent Van Der Reede, M (Megan)				Opponent Esau, K (Kelsey)

#	Games	Start				End
1	3	Tournament Cape Winelands Schools Closed 2019				Tournament Cape Winelands Schools Closed 2019
		date 2019-03-16	rnd 2	type Standard	result 1	date 2019-03-16	rnd 4	type Standard	result 1
		Opponent Engelbrecht, J (Jane)				Opponent Buis, J (Joane)
2	2	Tournament Western Cape Schools 2022				Tournament Western Cape Schools 2022
		date 2022-05-28	rnd 2	type Standard	result 1	date 2022-05-28	rnd 3	type Standard	result 1
		Opponent Van Brakel, L (Lia)				Opponent Livi, Z (Zininsi)
3	2	Tournament Cape Winelands Schools 2022				Tournament Cape Winelands Schools 2022
		date 2022-03-12	rnd 3	type Standard	result 1	date 2022-03-12	rnd 4	type Standard	result 1
		Opponent Janse Van Rensburg, J (Janke)				Opponent Mente, L (Limi)

#	Games	Start				End
1	3	Tournament Cape Winelands Schools - HS Trials 1 2024				Tournament Cape Winelands Schools - HS Trials 1 2024
		date 2024-02-17	rnd 4	type Rapid	result 1	date 2024-02-17	rnd 6	type Rapid	result 1
		Opponent Van Kerwel, Z (Zailey)				Opponent Cloete, Z (Zoe)
2	3	Tournament Stellenbosch Primary 2022				Tournament Stellenbosch Primary 2022
		date 2022-08-13	rnd 3	type Rapid	result 1	date 2022-08-13	rnd 5	type Rapid	result 1
		Opponent Du Plessis, M (Madelein)				Opponent Maart, M (Mia)
3	3	Tournament Central Winelands Schools Individual Trials 2022				Tournament Rhenish Primary Tournament 2022
		date 2022-02-19	rnd 5	type Rapid	result 1	date 2022-05-14	rnd 2	type Rapid	result 1
		Opponent Samuels, T (Tatum)				Opponent Coetsee, E (Ewaldt)

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)	6	0.5	-354.2	4	0.5	-318.8	2	0	-425	0	0	0
1	Nortje ,D (Dell-Maree)	6	1101.5	747.3	4	1068.6	782.7	2	941.8	676.5	0	0	0
2	Nieuwoudt ,N (Noreht)	3	0	-425	2	0	-425	1	0	-425	0	0	0
2	Nieuwoudt ,N (Noreht)	3	978	553	2	851.2	553	1	1084.5	553	0	0	0
3	Pretorius ,A (Amanda Karen)	3	0	-425	2	0	-425	1	0	-425	0	0	0
3	Pretorius ,A (Amanda Karen)	3	1235.2	810.2	2	1206.3	810.2	1	1299.2	810.2	0	0	0
4	Ntlahla ,A (Anathi)	3	2	141.7	2	2	425	1	0	-425	0	0	0
4	Ntlahla ,A (Anathi)	3	1229.2	1370.9	2	1294.7	1654.2	1	1102.4	804.2	0	0	0
5	Mente ,L (Limi)	3	3	425	2	2	425	1	1	425	0	0	0
5	Mente ,L (Limi)	3	1167	1592	2	1173.7	1592	1	1034.2	1592	0	0	0
6	Grove ,E (Emily)	3	0	-425	2	0	-425	1	0	-425	0	0	0
6	Grove ,E (Emily)	3	1354.3	929.3	2	1277.1	929.3	1	1383.5	929.3	0	0	0
7	Engelbrecht ,J (Jane)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
7	Engelbrecht ,J (Jane)	2	1178.7	1391.2	2	1220.4	1391.2	0	0	0	0	0	0
8	Wearing ,E (Ethan)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Wearing ,E (Ethan)	2	974	549	2	973.2	549	0	0	0	0	0	0
9	Groenewald ,A (Ancha)	2	0	-425	1	0	-425	1	0	-425	0	0	0
9	Groenewald ,A (Ancha)	2	990.3	565.3	1	1116.2	565.3	1	756	565.3	0	0	0
10	Hector ,K (Kida)	2	0	-425	1	0	-425	1	0	-425	0	0	0
10	Hector ,K (Kida)	2	1244.1	819.1	1	1248.6	819.1	1	1260	819.1	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Roos, A (Aleza)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms