Chess South Africa Ratings Database

PLAYER PAGE

Personal

Afonso, IS (Isabella)

Chess SA id

208088220

FIDE id

Date of birth

2008-02-15 (U18)

Gender

Female

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-10-18

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1274.9	1272.3	957.4	675
Raw rating	1265.5	1257	957.4	675
Weighted rating	1274.9	1272.3	957.4	675
Weighted performance	1019.2	1011.1	588.7	0
Floor	872	859.3	500	500
K-factor	36	36	40	40
Min/Max rating change allowed	151	152.9	234.3	350.3
Highest rating	1386.4 2023-04-01	1373.6 2023-04-01	1200 2024-11-01	1200 2018-02-01
Highest raw rating	1372 2023-05-01	1359.3 2023-05-01	957.4 2024-03-01	675 2024-03-01
Highest weighted rating	1372 2024-03-01	1359.3 2024-03-01	957.4 2024-11-01	675 2024-11-01
Highest weighted performance	1386.4 2023-04-01	1373.6 2023-04-01	1200 2024-12-01	1200 2018-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-1.1	-1.7	0	0
New rating	1273.8	1270.7	957.4	675
Analysis
Rating	1274.9	1272.3	957.4	675
Raw rating	1265.5	1257	957.4	675
Weighted rating	1274.9	1272.3	957.4
Weighted performance	1019.2	1011.1	588.7
K-factor	36	36	40	40
Floor	872	859.3	500	500
Max/Min rating change allowed	151	152.9	234.3	350.3
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	1265.5	1257	957.4	675
New weighted rating	1273.8	1270.7	957.4	675
New weighted performance	1012.2	1004.1	582	0
Temp new rating	1273.8	1270.7	957.4	675
Temp new rating +/-	-1.1	-1.7	0	0
Final new rating +/-	-1.1	-1.7	0	0
New rating	1273.8	1270.7	957.4	675
New K-factor	36	36	40	40
New floor	872	859.3	500	500

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	6	6	0	0
	10	10	0	0
	46	40	6	0
	42	36	6	0
	15	10	5	0
History	287	247	27	13

Games since
	Main 16	Standard 16		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	6	2	33.33	-141.7	1347.4	1205.7
Standard	6	2	33.33	-141.7	1347.4	1205.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	260	120	46.15	-32.7	1215.3	1182.6
Standard	220	105	47.73	-19.3	1208.2	1188.8
Rapid	27	12	44.44	-47.2	1255.2	1208
Blitz	13	3	23.08	-228.8	1253.4	1024.5

Date	Main	Standard	Rapid	Blitz
2025-11-01	1265.5	1257	957.4	675
2025-09-30	1281.6	1280.4	957.4	675
2025-09-01	1281.6	1280.4	957.4	675
2025-08-01	1281.6	1280.4	957.4	675
2025-07-01	1281.6	1280.4	957.4	675
2025-06-01	1281.6	1280.4	957.4	675
2025-05-01	1281.6	1280.4	957.4	675
2025-04-01	1281.6	1280.4	957.4	675
2025-03-01	1281.6	1280.4	957.4	675
2025-02-01	1281.6	1280.2	957.4	675
2025-01-01	1260.3	1255.6	957.4	675
2024-12-01	1260.3	1255.6	957.4	675
2024-11-01	1260.3	1255.6	957.4	675
2024-10-01	1260.3	1255.6	957.4	675
2024-09-01	1260.3	1255.6	957.4	675
2024-08-01	1260.3	1255.6	957.4	675
2024-07-01	1260.3	1255.6	957.4	675
2024-09-01	1260.3	1255.6	957.4	675
2024-05-01	1260.3	1255.6	957.4	675
2024-04-01	1260.3	1255.6	957.4	675
2024-03-01	1312.9	1322.9	957.4	675
2024-02-01	1324.6	1336.6	957.4	675
2024-01-01	1324.6	1336.6	957.4	675
2023-12-01	1324.6	1336.6	957.4	675

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	Paarl Boys' High School Chess Festival 2025 (C)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Paarl Boys' High School Chess Festival 2025 (C)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis
2	Cape Town Open Chess Championship 2024 (Intermediate)	2024-03-16	2024-03-17	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
3	North District School Trials 2024 (U18 Girls)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	4	1.5	Yes	Analysis
4	Paarl Boys High Chess Festival 2023 (2nd Division)	2023-10-13	2023-10-14	Standard	Cape Winelands (WCW)	6	5	3	Yes	Analysis
5	Western Cape Closed Championship 2023 (D)	2023-09-24	2023-09-25	Standard	Cape Town (WCT)	6	5	2.5	Yes	Analysis
6	Western Cape Closed Championship 2023 (U16)	2023-09-23	2023-09-23	Rapid	Cape Town (WCT)	6	6	1.5	Yes	Analysis
7	WP Closed 2023 (U16)	2023-06-16	2023-06-17	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
8	Western Cape HS Individuals 2023 (U15 Girls)	2023-04-01	2023-04-02	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
9	Cape Town Metro Schools Chess Closed Individuals 2023 (U15 Girls)	2023-02-03	2023-03-04	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
10	North District School Trials 2023 (U15 Girls)	2023-02-03	2023-02-04	Standard	Cape Town (WCT)	6	6	5	Yes	Analysis
11	Cape of Good Hope Open 2023 (Intermediate)	2023-01-28	2023-01-29	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
12	Western Cape Closed Championship 2022 (Open)	2022-09-24	2022-09-25	Standard	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis
13	WP Closed 2022 (U16)	2022-06-16	2022-06-16	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
14	Stellenberg Chess Championship 2022 (Challengers 2)	2022-06-24	2022-06-25	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
15	Western Cape Schools Chess 2022 (U15 Girls)	2022-05-07	2022-05-08	Standard	Eden (WEG)	6	6	4	Yes	Analysis
16	District North 2022 (U15)	2022-03-06	2022-03-06	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
17	Western Province Open 2022 (Intermediate)	2022-02-26	2022-02-27	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
18	SA National Team School Chess Championships 2022 (Girls)	2022-02-04	2022-02-05	Standard	Lejweleputswa (FLW)	6	6	4	Yes	Analysis
19	Western Cape Schools Championship 2021 (U13 Girls)	2021-10-02	2021-10-02	Rapid	Cape Town (WCT)	5	5	3.5	Yes	Analysis
20	CWP Closed 2021 (Development)	2021-09-18	2021-09-19	Standard	Cape Town (WCT)	6	5	2	Yes	Analysis
21	WP Open 2021 (Prestige)	2021-05-08	2021-05-09	Standard	Cape Town (WCT)	6	5	0.5	Yes	Analysis
22	2020 Western Province Open (Prestige)	2020-03-07	2020-03-08	Standard	Cape Town (WCT)	6	3	1	Yes	Analysis
23	2020 Metro Trials (U13 Girls)	2020-03-13	2020-03-14	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
24	Metro North Individual Trials 2020 (U13)	2020-02-07	2020-02-08	Standard	Cape Town (WCT)	6	6	5	Yes	Analysis
25	2019 South African Junior Team Championships (U12 Girls)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	2.5	Yes	Analysis
26	Bellville Rapid Oct 2019	2019-10-14	2019-10-14	Rapid	Cape Town (WCT)	6	5	2	Yes	Analysis
27	Bellville Blitz 2019	2019-09-16	2019-09-16	Blitz	Cape Town (WCT)	6	6	2	Yes	Analysis
28	2019 Western Cape Closed Chess Championships (D)	2019-09-21	2019-09-22	Standard	Cape Winelands (WCW)	6	6	4.5	Yes	Analysis
29	2019 Western Province League (E)	2019-07-27	2019-08-10	Standard	Cape Town (WCT)	9	8	3	Yes	Analysis
30	2019 WP Youth Open (B)	2019-07-13	2019-07-13	Standard	Cape Town (WCT)	5	5	1	Yes	Analysis
31	South African Schools Individuals Chess Championships 2019 (U13 Girls)	2019-06-18	2019-06-21	Standard	Frances Baard (NCF)	7	6	1	Yes	Analysis
32	Stellenberg Youth Chess Championship 2019 (D)	2019-05-01	2019-05-01	Standard	Cape Town (WCT)	5	4	2	Yes	Analysis
33	Western Cape Schools Individuals 2019 (U11 Girls)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	4	Yes	Analysis
34	Steinitz Chess Festival 2019 (C)	2019-04-05	2019-04-07	Standard	Cape Town (WCT)	6	3	0	Yes	Analysis
35	Bellville Club Champs 2019 (C2)	2019-04-29	2019-06-03	Standard	Cape Town (WCT)	5	4	1	Yes	Analysis
36	Bellville Club Champs 2019 (C)	2019-02-04	2019-04-15	Standard	Cape Town (WCT)	7	7	3	Yes	Analysis
37	Metro School Chess Closed Individual Trials 2019 (U11 Girls)	2019-03-01	2019-03-02	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
38	District North Schools Chess Trials 2019 (U11)	2019-01-25	2019-01-26	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
39	Bellville Chess Club 01 Blitz Tournament 2019	2019-01-28	2019-01-28	Blitz	Cape Town (WCT)	7	7	1	Yes	Analysis
40	South African Junior Team Championships 2018 (U12B Girls)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	6	4	Yes	Analysis
41	Stellenberg Youth Chess Champs 2018 (C)	2018-06-22	2018-06-23	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
42	Western Cape Schools Individuals 2018 (U11 Girls)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	6	3	Yes	Analysis
43	2018 WP Schools Closed Trials (U11 Girls)	2018-03-09	2018-03-10	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
44	2018 Steinitz Chess Festival (B)	2018-03-21	2018-03-25	Standard	Cape Town (WCT)	7	7	2	Yes	Analysis
45	District North Schools Chess Open Trials 2018 (U11)	2018-02-09	2018-02-10	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
46	Welgemoed Chess Challenge 2018 (U12)	2018-02-24	2018-02-24	Rapid	Cape Town (WCT)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2023				Tournament North District School Trials 2023
		date 2023-02-03	rnd 1	type Standard	result 1	date 2023-02-04	rnd 6	type Standard	result 1
		Opponent Cabane, S (Sukume)				Opponent Matima, L (Lee-Anne)
2	5	Tournament CWP Closed 2021				Tournament Western Cape Schools Championship 2021
		date 2021-09-19	rnd 6	type Standard	result 1	date 2021-10-02	rnd 4	type Rapid	result 1
		Opponent Smith, S (Shiloh)				Opponent October, K (Katelin)
3	5	Tournament 2019 Western Cape Closed Chess Championships				Tournament 2019 Western Cape Closed Chess Championships
		date 2019-09-21	rnd 2	type Standard	result 1	date 2019-09-22	rnd 6	type Standard	result 1
		Opponent Nord, J (Jade)				Opponent Beveridge, TG (Talitha)

#	Games	Start				End
1	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2023				Tournament North District School Trials 2023
		date 2023-02-03	rnd 1	type Standard	result 1	date 2023-02-04	rnd 6	type Standard	result 1
		Opponent Cabane, S (Sukume)				Opponent Matima, L (Lee-Anne)
2	5	Tournament 2019 Western Cape Closed Chess Championships				Tournament 2019 Western Cape Closed Chess Championships
		date 2019-09-21	rnd 2	type Standard	result 1	date 2019-09-22	rnd 6	type Standard	result 1
		Opponent Nord, J (Jade)				Opponent Beveridge, TG (Talitha)
3	4	Tournament Western Cape Closed Championship 2023				Tournament Paarl Boys High Chess Festival 2023
		date 2023-09-25	rnd 4	type Standard	result 1	date 2023-10-13	rnd 1	type Standard	result 1
		Opponent Diniso, S (Solulele)				Opponent Janse Van Vuuren, A (Abri)

#	Games	Start				End
1	6	Tournament Bellville Rapid Oct 2019				Tournament Western Cape Schools Championship 2021
		date 2019-10-14	rnd 5	type Rapid	result 1	date 2021-10-02	rnd 4	type Rapid	result 1
		Opponent Van Zyl, E (Erasmus)				Opponent October, K (Katelin)
2	2	Tournament District North 2022				Tournament District North 2022
		date 2022-03-06	rnd 1	type Rapid	result 1	date 2022-03-06	rnd 2	type Rapid	result 1
		Opponent Mxuma, L (Lunika)				Opponent Skyerer, R (Rudolph)
3	1	Tournament Western Cape Closed Championship 2023				Tournament Western Cape Closed Championship 2023
		date 2023-09-23	rnd 5	type Rapid	result 0.5	date 2023-09-23	rnd 5	type Rapid	result 0.5
		Opponent De Vos, ES (Eustace Steyn)				Opponent De Vos, ES (Eustace Steyn)

#	Games	Start				End
1	1	Tournament Bellville Blitz 2019				Tournament Bellville Blitz 2019
		date 2019-09-16	rnd 5	type Blitz	result 1	date 2019-09-16	rnd 5	type Blitz	result 1
		Opponent Osborne, H (Hannah)				Opponent Osborne, H (Hannah)
2	1	Tournament Bellville Blitz 2019				Tournament Bellville Blitz 2019
		date 2019-09-16	rnd 2	type Blitz	result 1	date 2019-09-16	rnd 2	type Blitz	result 1
		Opponent Moses, E (Eustace)				Opponent Moses, E (Eustace)
3	1	Tournament Bellville Chess Club 01 Blitz Tournament 2019				Tournament Bellville Chess Club 01 Blitz Tournament 2019
		date 2019-01-28	rnd 7	type Blitz	result 1	date 2019-01-28	rnd 7	type Blitz	result 1
		Opponent Maritz, J (Jean)				Opponent Maritz, J (Jean)

#	Games	Start				End
1	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2023				Tournament North District School Trials 2023
		date 2023-02-03	rnd 1	type Standard	result 1	date 2023-02-04	rnd 6	type Standard	result 1
		Opponent Cabane, S (Sukume)				Opponent Matima, L (Lee-Anne)
2	4	Tournament Metro North Individual Trials 2020				Tournament Metro North Individual Trials 2020
		date 2020-02-08	rnd 3	type Standard	result 1	date 2020-02-08	rnd 6	type Standard	result 1
		Opponent Pekeur, K (Kylie)				Opponent Strydom, S (Stefan)
3	4	Tournament Western Cape Schools Individuals 2019				Tournament Western Cape Schools Individuals 2019
		date 2019-05-18	rnd 2	type Standard	result 1	date 2019-05-19	rnd 5	type Standard	result 1
		Opponent Lawrence, J (Jedidah)				Opponent Kilroe-Smith, G (Gabriella)

#	Games	Start				End
1	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2023				Tournament North District School Trials 2023
		date 2023-02-03	rnd 1	type Standard	result 1	date 2023-02-04	rnd 6	type Standard	result 1
		Opponent Cabane, S (Sukume)				Opponent Matima, L (Lee-Anne)
2	4	Tournament Metro North Individual Trials 2020				Tournament Metro North Individual Trials 2020
		date 2020-02-08	rnd 3	type Standard	result 1	date 2020-02-08	rnd 6	type Standard	result 1
		Opponent Pekeur, K (Kylie)				Opponent Strydom, S (Stefan)
3	4	Tournament Western Cape Schools Individuals 2019				Tournament Western Cape Schools Individuals 2019
		date 2019-05-18	rnd 2	type Standard	result 1	date 2019-05-19	rnd 5	type Standard	result 1
		Opponent Lawrence, J (Jedidah)				Opponent Kilroe-Smith, G (Gabriella)

#	Games	Start				End
1	3	Tournament Western Cape Schools Championship 2021				Tournament Western Cape Schools Championship 2021
		date 2021-10-02	rnd 2	type Rapid	result 1	date 2021-10-02	rnd 4	type Rapid	result 1
		Opponent Ntabeni, P (Phelisa)				Opponent October, K (Katelin)
2	2	Tournament District North 2022				Tournament District North 2022
		date 2022-03-06	rnd 1	type Rapid	result 1	date 2022-03-06	rnd 2	type Rapid	result 1
		Opponent Mxuma, L (Lunika)				Opponent Skyerer, R (Rudolph)
3	2	Tournament Bellville Rapid Oct 2019				Tournament Bellville Rapid Oct 2019
		date 2019-10-14	rnd 5	type Rapid	result 1	date 2019-10-14	rnd 6	type Rapid	result 1
		Opponent Van Zyl, E (Erasmus)				Opponent Webster, M (Matthew)

#	Games	Start				End
1	1	Tournament Bellville Blitz 2019				Tournament Bellville Blitz 2019
		date 2019-09-16	rnd 5	type Blitz	result 1	date 2019-09-16	rnd 5	type Blitz	result 1
		Opponent Osborne, H (Hannah)				Opponent Osborne, H (Hannah)
2	1	Tournament Bellville Blitz 2019				Tournament Bellville Blitz 2019
		date 2019-09-16	rnd 2	type Blitz	result 1	date 2019-09-16	rnd 2	type Blitz	result 1
		Opponent Moses, E (Eustace)				Opponent Moses, E (Eustace)
3	1	Tournament Bellville Chess Club 01 Blitz Tournament 2019				Tournament Bellville Chess Club 01 Blitz Tournament 2019
		date 2019-01-28	rnd 7	type Blitz	result 1	date 2019-01-28	rnd 7	type Blitz	result 1
		Opponent Maritz, J (Jean)				Opponent Maritz, J (Jean)

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	Zenzile ,A (Amahle)	11	0	-425	10	0	-425	1	0	-425	0	0	0
1	Zenzile ,A (Amahle)	11	1412.7	987.7	10	1400.1	987.7	1	1366.9	987.7	0	0	0
2	Gebu ,S (Sisipho)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
2	Gebu ,S (Sisipho)	4	1271.2	1165	4	1250.1	1165	0	0	0	0	0	0
3	Osborne ,H (Hannah)	4	2	0	2	1	0	0	0	0	2	1	0
3	Osborne ,H (Hannah)	4	1199.8	1199.8	2	1234.9	1199.8	0	0	0	2	1191.8	1199.8
4	Olkers ,C (Caitlyn)	3	0	-425	3	0	-425	0	0	0	0	0	0
4	Olkers ,C (Caitlyn)	3	1394.3	969.3	3	1372.9	969.3	0	0	0	0	0	0
5	Hector ,K (Kida)	3	3	425	3	3	425	0	0	0	0	0	0
5	Hector ,K (Kida)	3	1176.2	1601.2	3	1171.2	1601.2	0	0	0	0	0	0
6	October ,K (Katelin)	3	1	-141.7	2	0	-425	1	1	425	0	0	0
6	October ,K (Katelin)	3	1256.5	1114.8	2	1265.1	831.5	1	1200	1681.5	0	0	0
7	Sihamba ,S (Somila)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
7	Sihamba ,S (Somila)	2	1273.3	1485.8	2	1285.6	1485.8	0	0	0	0	0	0
8	Steenkamp ,A (Ane)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Steenkamp ,A (Ane)	2	1178.7	753.7	2	1176.6	753.7	0	0	0	0	0	0
9	Pekeur ,K (Kylie)	2	2	425	2	2	425	0	0	0	0	0	0
9	Pekeur ,K (Kylie)	2	1126.2	1551.2	2	1115.4	1551.2	0	0	0	0	0	0
10	Peerutin ,L (Leo)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Peerutin ,L (Leo)	2	1246.6	821.6	2	1235.2	821.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Afonso, IS (Isabella)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms