Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grobbelaar, A (Antoni)

Chess SA id

1120305463

FIDE id

Date of birth

2012-09-01 (U16)

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

Item	Main	Standard	Rapid	Blitz
Rating	1231.9	1243.2	1181.7	1200
Raw rating	1231.9	1243.2	1181.7	1200
Weighted rating	1217.7	1231	1178.7	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	1217.7	1231	1178.7
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	1219.6	1232.8	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
2026-01-01	1231.9	1243.2	1181.7	1200
2025-11-30	1231.9	1243.2	1181.7	1200
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
2024-11-01	1201.4	1200	1204.4	1200
2024-07-01	1201.4	1200	1204.4	1200
2024-06-01	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

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	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

Ratings

Tournaments

Grand Prix

Statistics

Notifications

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