Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grobbelaar, A (Antoni)

Chess SA id

1120305463

FIDE id

Date of birth

2012-09-01 (U14)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-03-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1352.4

Item	Main	Standard	Rapid	Blitz
Rating	1231.9	1243.2	1181.7	1200
Raw rating	1231.9	1243.2	1181.7	1200
Weighted rating	1213.8	1226.9	1178.8	1200
Weighted performance	0	0	0	0
Floor	744.8	761.1	704.4	700
K-factor	36	36	36	36
Min/Max rating change allowed	158.4	155.9	170.2	165.8
Highest rating	1244.8 2025-03-01	1261.1 2025-03-01	1219.3 2024-05-01	1200 2024-05-01
Highest raw rating	1244.8 2025-03-01	1261.1 2025-03-01	1204.4 2024-06-01	1200 2024-05-01
Highest weighted rating	1244.8 2024-08-01	1219.7 2025-08-01	1204.4 2024-08-01	1200 2024-05-01
Highest weighted performance	1200 2024-12-01	1200 2024-05-01	1219.3 2024-05-01	1200 2024-05-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1231.9	1243.2	1181.7	1200
Analysis
Rating	1231.9	1243.2	1181.7	1200
Raw rating	1231.9	1243.2	1181.7	1200
Weighted rating	1213.8	1226.9	1178.8
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	744.8	761.1	704.4	700
Max/Min rating change allowed	158.4	155.9	170.2	165.8
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	1231.9	1243.2	1181.7	1200
New weighted rating	1215.8	1229	1178.7	1200
New weighted performance	0	0	0	0
Temp new rating	1231.9	1243.2	1181.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1231.9	1243.2	1181.7	1200
New K-factor	36	36	36	36
New floor	744.8	761.1	704.4	700

Item	Main	Standard	Rapid
	0	0	0
	10	10	0
	11	0	11
	0	0	0
	0	0	0
	0	0	0
History	21	10	11

Games since
	Main 21	Standard 10		Rapid 11		Blitz 0
Gender	Male
Age group	U14
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	10	6	60	85	1256.2	1341.2
Standard	10	6	60	85	1256.2	1341.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	21	10	47.62	-20.2	1236.8	1216.6
Standard	10	6	60	85	1256.2	1341.2
Rapid	11	4	36.36	-115.9	1219.1	1103.2
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1231.9	1243.2	1181.7	1200
2025-09-30	1231.9	1243.2	1181.7	1200
2025-09-01	1231.9	1243.2	1181.7	1200
2025-08-01	1231.9	1243.2	1181.7	1200
2025-07-01	1231.9	1243.2	1181.7	1200
2025-06-01	1231.9	1243.2	1181.7	1200
2025-05-01	1231.9	1243.2	1181.7	1200
2025-04-01	1231.9	1243.2	1181.7	1200
2025-03-01	1244.8	1261.1	1181.7	1200
2025-02-01	1188.2	1200	1180.2	1200
2025-01-01	1172	1200	1152.2	1200
2024-12-01	1172	1200	1152.2	1200
2024-11-01	1172	1200	1152.2	1200
2024-10-01	1172	1200	1152.2	1200
2024-09-01	1172	1200	1152.2	1200
2024-08-01	1201.4	1200	1204.4	1200
2024-07-01	1201.4	1200	1204.4	1200
2024-09-01	1201.4	1200	1204.4	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200

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	Stellenbosch Primary 2025 (U13)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	0	0	No	Analysis
2	Cape Winelands Schools Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
3	Cape Winelands Schools - Trials 1 2025 (U13 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Stellenbosch Primary 2025 (U13)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	0	0	No	Analysis
2	Cape Winelands Schools Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
3	Cape Winelands Schools - Trials 1 2025 (U13 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
4	Stellenbosch Primary 2024 (U13)	2024-08-17	2024-08-17	Rapid	Cape Winelands (WCW)	5	5	1	Yes	Analysis
5	Rhenish PS Tournament 2024 (U14)	2024-05-11	2024-05-11	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis

#	Games	Start				End
1	4	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-22	rnd 3	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Geers, R (Ruben)				Opponent Joseph, V (Valdemiro)
2	2	Tournament Rhenish PS Tournament 2024				Tournament Rhenish PS Tournament 2024
		date 2024-05-11	rnd 4	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Sauls, PQ (Piper)				Opponent Senti, S (Samuel)
3	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Rust, N (Nikola)				Opponent Rust, N (Nikola)

#	Games	Start				End
1	4	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-22	rnd 3	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Geers, R (Ruben)				Opponent Joseph, V (Valdemiro)
2	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Rust, N (Nikola)				Opponent Rust, N (Nikola)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 1	type Standard	result 1
		Opponent Kurtz, E (Eli)				Opponent Kurtz, E (Eli)

#	Games	Start				End
1	2	Tournament Rhenish PS Tournament 2024				Tournament Rhenish PS Tournament 2024
		date 2024-05-11	rnd 4	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Sauls, PQ (Piper)				Opponent Senti, S (Samuel)
2	1	Tournament Stellenbosch Primary 2024				Tournament Stellenbosch Primary 2024
		date 2024-08-17	rnd 1	type Rapid	result 1	date 2024-08-17	rnd 1	type Rapid	result 1
		Opponent Kuhn, J (Jm)				Opponent Kuhn, J (Jm)
3	1	Tournament Rhenish PS Tournament 2024				Tournament Rhenish PS Tournament 2024
		date 2024-05-11	rnd 2	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Wareley, C (Caleb)				Opponent Wareley, C (Caleb)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-22	rnd 3	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Geers, R (Ruben)				Opponent Joseph, V (Valdemiro)
2	2	Tournament Rhenish PS Tournament 2024				Tournament Rhenish PS Tournament 2024
		date 2024-05-11	rnd 4	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Sauls, PQ (Piper)				Opponent Senti, S (Samuel)
3	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Rust, N (Nikola)				Opponent Rust, N (Nikola)

#	Games	Start				End
1	4	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-22	rnd 3	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Geers, R (Ruben)				Opponent Joseph, V (Valdemiro)
2	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Rust, N (Nikola)				Opponent Rust, N (Nikola)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 1	type Standard	result 1
		Opponent Kurtz, E (Eli)				Opponent Kurtz, E (Eli)

#	Games	Start				End
1	2	Tournament Rhenish PS Tournament 2024				Tournament Rhenish PS Tournament 2024
		date 2024-05-11	rnd 4	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Sauls, PQ (Piper)				Opponent Senti, S (Samuel)
2	1	Tournament Stellenbosch Primary 2024				Tournament Stellenbosch Primary 2024
		date 2024-08-17	rnd 1	type Rapid	result 1	date 2024-08-17	rnd 1	type Rapid	result 1
		Opponent Kuhn, J (Jm)				Opponent Kuhn, J (Jm)
3	1	Tournament Rhenish PS Tournament 2024				Tournament Rhenish PS Tournament 2024
		date 2024-05-11	rnd 2	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Wareley, C (Caleb)				Opponent Wareley, C (Caleb)

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	Abrahams ,F (Frielano)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Abrahams ,F (Frielano)	1	1199	774	1	1198.8	774	0	0	0	0	0	0
2	Rust ,N (Nikola)	1	1	425	1	1	425	0	0	0	0	0	0
2	Rust ,N (Nikola)	1	1220.3	1645.3	1	1241.2	1645.3	0	0	0	0	0	0
3	Geers ,R (Ruben)	1	1	425	1	1	425	0	0	0	0	0	0
3	Geers ,R (Ruben)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Joseph ,V (Valdemiro)	1	1	425	1	1	425	0	0	0	0	0	0
4	Joseph ,V (Valdemiro)	1	1187.3	1612.3	1	1206.5	1612.3	0	0	0	0	0	0
5	Kurtz ,E (Eli)	1	1	425	1	1	425	0	0	0	0	0	0
5	Kurtz ,E (Eli)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	van der Walt ,M (Marko)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	van der Walt ,M (Marko)	1	1212.6	787.6	1	1214.8	787.6	0	0	0	0	0	0
7	Nagel ,A (Alexander)	1	1	425	1	1	425	0	0	0	0	0	0
7	Nagel ,A (Alexander)	1	1289.3	1714.3	1	1274.5	1714.3	0	0	0	0	0	0
8	Young ,G (Gregory)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Young ,G (Gregory)	1	1328.4	903.4	1	1251	903.4	0	0	0	0	0	0
9	Mudau ,U (Unarine)	1	1	425	1	1	425	0	0	0	0	0	0
9	Mudau ,U (Unarine)	1	1297.9	1722.9	1	1280.6	1722.9	0	0	0	0	0	0
10	Sauls ,PQ (Piper)	1	1	425	0	0	0	1	1	425	0	0	0
10	Sauls ,PQ (Piper)	1	1144.2	1569.2	0	0	0	1	1157.2	1569.2	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Grobbelaar, A (Antoni)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms