Chess South Africa Ratings Database

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Personal

Grobbelaar, A (Altus)

Chess SA id

1090107941

FIDE id

Date of birth

2009-11-13 (U18)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-02

Personal details last changed

1900-01-01

Junior GPX Games

22.7

Junior GPX Points

1179.5

Item	Main	Standard	Rapid	Blitz
Rating	1260.6	1261.7	1223.2	1218
Raw rating	1260.6	1261.7	1223.2	1218
Weighted rating	1250.8	1256.9	1209.4	1218
Weighted performance	1168.8	1133.2	980	0
Floor	824.1	804.8	753.2	718
K-factor	36	36	36	36
Min/Max rating change allowed	152.1	151.9	160.4	161.6
Highest rating	1346.9 2022-11-01	1304.8 2022-12-01	1253.2 2022-09-01	1270.7 2020-02-01
Highest raw rating	1324.1 2022-12-01	1304.8 2022-12-01	1253.2 2022-09-01	1218 2024-02-01
Highest weighted rating	1324.1 2024-02-01	1304.8 2024-07-01	1253.2 2024-01-01	1218 2025-02-01
Highest weighted performance	1346.9 2022-11-01	1294.8 2022-11-01	1203.9 2020-02-01	1270.7 2020-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1260.6	1261.7	1223.2	1218
Analysis
Rating	1260.6	1261.7	1223.2	1218
Raw rating	1260.6	1261.7	1223.2	1218
Weighted rating	1250.8	1256.9	1209.4
Weighted performance	1168.8	1133.2	980
K-factor	36	36	36	36
Floor	824.1	804.8	753.2	718
Max/Min rating change allowed	152.1	151.9	160.4	161.6
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	1260.6	1261.7	1223.2	1218
New weighted rating	1251.5	1257.2	1210.4	1218
New weighted performance	1168.4	1132.8	979.6	0
Temp new rating	1260.6	1261.7	1223.2	1218
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1260.6	1261.7	1223.2	1218
New K-factor	36	36	36	36
New floor	824.1	804.8	753.2	718

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	21	16	5	0
	19	13	6	0
	10	5	5	0
	38	22	16	0
	0	0	0	0
History	181	75	97	9

Games since
	Main 40	Standard 29		Rapid 11		Blitz 0
Gender	Male
Age group	U18
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	3525		1155		167
Male	2729		833		116
U18	533		162		31
U18 Male	439		123		22
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-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	21	10	47.62	-20.2	1282.4	1262.2
Standard	16	7	43.75	-53.1	1315.2	1262.1
Rapid	5	3	60	85	1177.4	1262.4
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	181	90.5	50	0	1197.8	1197.8
Standard	75	37.5	50	0	1227.6	1227.6
Rapid	97	49	50.52	4.4	1163	1167.4
Blitz	9	4	44.44	-47.2	1324.1	1276.9

Date	Main	Standard	Rapid	Blitz
2025-09-30	1260.6	1261.7	1223.2	1218
2025-09-01	1260.6	1261.7	1223.2	1218
2025-08-01	1261.3	1261.7	1210.5	1218
2025-07-01	1261.3	1261.7	1210.5	1218
2025-06-01	1261.3	1261.7	1210.5	1218
2025-05-01	1261.3	1261.7	1210.5	1218
2025-04-01	1261.3	1261.7	1210.5	1218
2025-03-01	1260.5	1268.7	1210.5	1218
2025-02-01	1244.9	1251.7	1210.5	1218
2025-01-01	1222.1	1227.8	1199.6	1218
2024-12-01	1222.1	1227.8	1199.6	1218
2024-11-01	1239.1	1254.1	1199.6	1218
2024-10-01	1239.1	1254.1	1199.6	1218
2024-09-01	1239.1	1254.1	1199.6	1218
2024-08-01	1239.1	1254.1	1199.6	1218
2024-07-01	1237	1259.1	1199.6	1218
2024-06-01	1237	1259.1	1199.6	1218
2024-08-01	1237	1259.1	1199.6	1218
2024-04-01	1237	1259.1	1199.6	1218
2024-03-01	1237	1259.1	1199.6	1218
2024-02-01	1273.8	1259.1	1238.8	1218
2024-01-01	1278.8	1267.7	1238.8	1218
2023-12-01	1278.8	1267.7	1238.8	1218
2023-11-01	1278.8	1267.7	1238.8	1218

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	Cape Winelands Top Schools 2025 (U17+U19)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	0	0	No	Analysis
2	Cape Winelands Schools Development 2025 (U15+U17)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
3	Cape Winelands Schools Prestige 2025 (U17 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
4	Cape Winelands Schools - Trials 1 2025 (U17 Boys)	2025-02-08	2025-02-08	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
5	Marie Delport Memorial 2025 (Open)	2025-01-25	2025-01-26	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	Cape Winelands Top Schools 2025 (U17+U19)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	0	0	No	Analysis
2	Cape Winelands Schools Development 2025 (U15+U17)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
3	Cape Winelands Schools Prestige 2025 (U17 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
4	Cape Winelands Schools - Trials 1 2025 (U17 Boys)	2025-02-08	2025-02-08	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
5	Marie Delport Memorial 2025 (Open)	2025-01-25	2025-01-26	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis
6	Paarl Boys' High Chess Festival 2024 (Elite)	2024-10-04	2024-10-05	Standard	Cape Winelands (WCW)	6	4	1	Yes	Analysis
7	Cape Winelands - Top Schools 2024 (U15 Mixed)	2024-07-27	2024-07-27	Standard	Cape Winelands (WCW)	5	4	2	Yes	Analysis
8	Cape Winelands Schools - HS Trials 1 2024 (U15 Boys)	2024-02-17	2024-02-17	Rapid	Cape Winelands (WCW)	6	6	2	Yes	Analysis
9	Cape Winelands - Marie Delport Memorial 2024 (Open)	2024-01-27	2024-01-28	Standard	Cape Winelands (WCW)	6	5	2	Yes	Analysis
10	CW Top Schools 2023 (U15 Mix)	2023-08-26	2023-08-26	Rapid	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
11	Cape Winelands Schools Chess - Trials 1 2023 (U15 Boys)	2023-02-25	2023-02-25	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
12	CW Grass Roots Tournament 2022 (U13 Boys)	2022-11-19	2022-11-19	Standard	Cape Winelands (WCW)	5	5	5	Yes	Analysis
13	Stellenbosch Primary 2022 (U13)	2022-08-13	2022-08-13	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
14	Rhenish Primary Tournament 2022 (U14)	2022-05-14	2022-05-14	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
15	Ceres Open 2022 (B)	2022-04-23	2022-04-23	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
16	Cape Winelands Schools 2022 (U13 Boys)	2022-03-12	2022-03-12	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
17	Central Winelands Schools Individual Trials 2022 (U13 Boys)	2022-02-19	2022-02-19	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
18	Cape Winelands Open 2022 (U14)	2022-02-12	2022-02-13	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
19	Drakenstein Pioneers Inaugural 2020 (C)	2020-03-14	2020-03-14	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
20	Paul Roos Blitz 2020	2020-02-22	2020-02-22	Blitz	Cape Winelands (WCW)	9	9	4	Yes	Analysis
21	2020 Welgemoed Chess Challenge (U12)	2020-02-29	2020-02-29	Rapid	Cape Town (WCT)	5	5	3	Yes	Analysis
22	Cape Winelands Schools Trials 1 2020 (U11 Boys)	2020-02-08	2020-02-08	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
23	Back to School Rapid 2020 (Boys)	2020-02-01	2020-02-01	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
24	2019 Western Province League (E)	2019-07-27	2019-08-10	Standard	Cape Town (WCT)	9	3	2	Yes	Analysis
25	Stellenbosch Primary 2019 (U12)	2019-08-31	2019-08-31	Rapid	Cape Winelands (WCW)	7	7	4	Yes	Analysis
26	Cape Winelands Schools - Top Schools 2019 (U13 Mix)	2019-07-27	2019-07-27	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
27	Drakenstein Dragons Rapid 2019 (U11)	2019-06-15	2019-06-15	Rapid	Cape Winelands (WCW)	7	7	3.5	Yes	Analysis
28	Rhenish Primary Chess Tournament 2019 (U12)	2019-05-11	2019-05-11	Rapid	Cape Winelands (WCW)	7	7	3	Yes	Analysis
29	Cape Winelands Open 2019 (U12)	2019-04-27	2019-04-27	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
30	Nelson Mandela Rapid 2019 (Primary School)	2019-03-02	2019-03-02	Rapid	Cape Town (WCT)	5	5	2	Yes	Analysis
31	Cape Winelands Schools Closed 2019 (U11 Boys)	2019-03-16	2019-03-17	Standard	Cape Winelands (WCW)	7	6	1	Yes	Analysis
32	CW Schools Open 2019 (U11 Boys)	2019-02-02	2019-02-02	Rapid	Cape Winelands (WCW)	6	6	2	Yes	Analysis
33	Drakenstein Dragons Rapid 2019 (U11)	2019-01-19	2019-01-19	Rapid	Cape Winelands (WCW)	6	5	2	Yes	Analysis
34	Rhenish Primary Chess Tournament 2018 (U10)	2018-05-12	2018-05-12	Rapid	Cape Winelands (WCW)	7	7	3	Yes	Analysis

#	Games	Start				End
1	5	Tournament CW Grass Roots Tournament 2022				Tournament CW Grass Roots Tournament 2022
		date 2022-11-19	rnd 1	type Standard	result 1	date 2022-11-19	rnd 5	type Standard	result 1
		Opponent Mostert, R (Ruan)				Opponent Tiemie, J (Jaheim)
2	4	Tournament Cape Winelands Schools 2022				Tournament Ceres Open 2022
		date 2022-03-12	rnd 4	type Standard	result 1	date 2022-04-23	rnd 2	type Standard	result 1
		Opponent Liwane, K (Khanya)				Opponent Roberts, E (Ethan)
3	4	Tournament Stellenbosch Primary 2019				Tournament Stellenbosch Primary 2019
		date 2019-08-31	rnd 2	type Rapid	result 1	date 2019-08-31	rnd 5	type Rapid	result 1
		Opponent Hemphill, S (Sarah)				Opponent Boden, J (Joshua)

#	Games	Start				End
1	5	Tournament CW Grass Roots Tournament 2022				Tournament CW Grass Roots Tournament 2022
		date 2022-11-19	rnd 1	type Standard	result 1	date 2022-11-19	rnd 5	type Standard	result 1
		Opponent Mostert, R (Ruan)				Opponent Tiemie, J (Jaheim)
2	4	Tournament Cape Winelands Schools 2022				Tournament Ceres Open 2022
		date 2022-03-12	rnd 4	type Standard	result 1	date 2022-04-23	rnd 2	type Standard	result 1
		Opponent Liwane, K (Khanya)				Opponent Roberts, E (Ethan)
3	4	Tournament 2019 Western Province League				Tournament Drakenstein Pioneers Inaugural 2020
		date 2019-08-03	rnd 5	type Standard	result 1	date 2020-03-14	rnd 2	type Standard	result 1
		Opponent Vermeulen, I (Inge)				Opponent Kirchner, K (Keenan)

#	Games	Start				End
1	4	Tournament Stellenbosch Primary 2019				Tournament Stellenbosch Primary 2019
		date 2019-08-31	rnd 2	type Rapid	result 1	date 2019-08-31	rnd 5	type Rapid	result 1
		Opponent Hemphill, S (Sarah)				Opponent Boden, J (Joshua)
2	3	Tournament Cape Winelands Schools - Top Schools 2019				Tournament Cape Winelands Schools - Top Schools 2019
		date 2019-07-27	rnd 3	type Rapid	result 1	date 2019-07-27	rnd 5	type Rapid	result 1
		Opponent Baartman, N (Nicole)				Opponent Marais, C (Chante)
3	3	Tournament Drakenstein Dragons Rapid 2019				Tournament Drakenstein Dragons Rapid 2019
		date 2019-06-15	rnd 1	type Rapid	result 1	date 2019-06-15	rnd 3	type Rapid	result 1
		Opponent Le Fleur, C (Caydon)				Opponent Kruger, K (Kimlynn)

#	Games	Start				End
1	2	Tournament Paul Roos Blitz 2020				Tournament Paul Roos Blitz 2020
		date 2020-02-22	rnd 2	type Blitz	result 1	date 2020-02-22	rnd 3	type Blitz	result 1
		Opponent Prinsloo, J (Julen)				Opponent Smit, T (Tiaan)
2	1	Tournament Paul Roos Blitz 2020				Tournament Paul Roos Blitz 2020
		date 2020-02-22	rnd 8	type Blitz	result 1	date 2020-02-22	rnd 8	type Blitz	result 1
		Opponent Appollis, M (Martino)				Opponent Appollis, M (Martino)
3	1	Tournament Paul Roos Blitz 2020				Tournament Paul Roos Blitz 2020
		date 2020-02-22	rnd 5	type Blitz	result 1	date 2020-02-22	rnd 5	type Blitz	result 1
		Opponent Mnxakwe, I (Indiphile)				Opponent Mnxakwe, I (Indiphile)

#	Games	Start				End
1	5	Tournament CW Grass Roots Tournament 2022				Tournament CW Grass Roots Tournament 2022
		date 2022-11-19	rnd 1	type Standard	result 1	date 2022-11-19	rnd 5	type Standard	result 1
		Opponent Mostert, R (Ruan)				Opponent Tiemie, J (Jaheim)
2	4	Tournament Cape Winelands Schools 2022				Tournament Ceres Open 2022
		date 2022-03-12	rnd 4	type Standard	result 1	date 2022-04-23	rnd 2	type Standard	result 1
		Opponent Liwane, K (Khanya)				Opponent Roberts, E (Ethan)
3	4	Tournament Stellenbosch Primary 2019				Tournament Stellenbosch Primary 2019
		date 2019-08-31	rnd 2	type Rapid	result 1	date 2019-08-31	rnd 5	type Rapid	result 1
		Opponent Hemphill, S (Sarah)				Opponent Boden, J (Joshua)

#	Games	Start				End
1	5	Tournament CW Grass Roots Tournament 2022				Tournament CW Grass Roots Tournament 2022
		date 2022-11-19	rnd 1	type Standard	result 1	date 2022-11-19	rnd 5	type Standard	result 1
		Opponent Mostert, R (Ruan)				Opponent Tiemie, J (Jaheim)
2	4	Tournament Cape Winelands Schools 2022				Tournament Ceres Open 2022
		date 2022-03-12	rnd 4	type Standard	result 1	date 2022-04-23	rnd 2	type Standard	result 1
		Opponent Liwane, K (Khanya)				Opponent Roberts, E (Ethan)
3	4	Tournament 2019 Western Province League				Tournament Drakenstein Pioneers Inaugural 2020
		date 2019-08-03	rnd 5	type Standard	result 1	date 2020-03-14	rnd 2	type Standard	result 1
		Opponent Vermeulen, I (Inge)				Opponent Kirchner, K (Keenan)

#	Games	Start				End
1	4	Tournament Stellenbosch Primary 2019				Tournament Stellenbosch Primary 2019
		date 2019-08-31	rnd 2	type Rapid	result 1	date 2019-08-31	rnd 5	type Rapid	result 1
		Opponent Hemphill, S (Sarah)				Opponent Boden, J (Joshua)
2	3	Tournament Cape Winelands Schools - Top Schools 2019				Tournament Cape Winelands Schools - Top Schools 2019
		date 2019-07-27	rnd 3	type Rapid	result 1	date 2019-07-27	rnd 5	type Rapid	result 1
		Opponent Baartman, N (Nicole)				Opponent Marais, C (Chante)
3	3	Tournament Rhenish Primary Chess Tournament 2019				Tournament Rhenish Primary Chess Tournament 2019
		date 2019-05-11	rnd 3	type Rapid	result 1	date 2019-05-11	rnd 5	type Rapid	result 1
		Opponent Panduva, O (Ongeza)				Opponent Havenga, N (Nico)

#	Games	Start				End
1	2	Tournament Paul Roos Blitz 2020				Tournament Paul Roos Blitz 2020
		date 2020-02-22	rnd 2	type Blitz	result 1	date 2020-02-22	rnd 3	type Blitz	result 1
		Opponent Prinsloo, J (Julen)				Opponent Smit, T (Tiaan)
2	1	Tournament Paul Roos Blitz 2020				Tournament Paul Roos Blitz 2020
		date 2020-02-22	rnd 8	type Blitz	result 1	date 2020-02-22	rnd 8	type Blitz	result 1
		Opponent Appollis, M (Martino)				Opponent Appollis, M (Martino)
3	1	Tournament Paul Roos Blitz 2020				Tournament Paul Roos Blitz 2020
		date 2020-02-22	rnd 5	type Blitz	result 1	date 2020-02-22	rnd 5	type Blitz	result 1
		Opponent Mnxakwe, I (Indiphile)				Opponent Mnxakwe, I (Indiphile)

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	Lombaard ,R (Romelio)	3	2	141.7	1	1	425	2	1	0	0	0	0
1	Lombaard ,R (Romelio)	3	1175	1316.7	1	1200	1600	2	1206.3	1175	0	0	0
2	Zungula ,C (Chulumanco)	3	0	-425	0	0	0	3	0	-425	0	0	0
2	Zungula ,C (Chulumanco)	3	1155.7	730.7	0	0	0	3	1220.9	730.7	0	0	0
3	De Klerk ,H (Hanro)	2	1	0	2	1	0	0	0	0	0	0	0
3	De Klerk ,H (Hanro)	2	1246.9	1246.9	2	1194.2	1246.9	0	0	0	0	0	0
4	Springveldt ,L (Lael)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Springveldt ,L (Lael)	2	1116.7	691.7	2	1194.2	691.7	0	0	0	0	0	0
5	Coetzee ,C (Conlinn)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Coetzee ,C (Conlinn)	2	1317.8	892.8	2	1299.9	892.8	0	0	0	0	0	0
6	Goosen ,P (Pierre)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Goosen ,P (Pierre)	2	1437.9	1012.9	2	1421.8	1012.9	0	0	0	0	0	0
7	Jansen ,V (Verron)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
7	Jansen ,V (Verron)	2	1175.5	963	2	1039.2	963	0	0	0	0	0	0
8	Koopman ,J (Jayden)	2	1	0	1	1	425	1	0	-425	0	0	0
8	Koopman ,J (Jayden)	2	1205.2	1205.2	1	1200	1630.2	1	1210.3	780.2	0	0	0
9	Wu ,J (Jason)	2	0	-425	1	0	-425	1	0	-425	0	0	0
9	Wu ,J (Jason)	2	1313.6	888.6	1	1456.5	888.6	1	1202.4	888.6	0	0	0
10	Blaauws ,I (Ilano)	2	1	0	1	1	425	1	0	-425	0	0	0
10	Blaauws ,I (Ilano)	2	1283.4	1283.4	1	1245.1	1708.4	1	1305.3	858.4	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Grobbelaar, A (Altus)

Ratings

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Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms