Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grobbelaar, G (Gideon)

Chess SA id

1100105051

FIDE id

Date of birth

2010-04-05 (U16)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1276.3	1247.2	1259.3	1200
Raw rating	1276.3	1247.2	1259.3	1200
Weighted rating	1241.8	1219.7	1244.7	1200
Weighted performance	893.6	887.2	0	0
Floor	776.3	747.2	759.3	700
K-factor	36	36	36	36
Min/Max rating change allowed	148.7	155	152.4	165.8
Highest rating	1276.3 2025-09-01	1247.2 2025-09-01	1595.6 2024-07-01	1200 2018-10-01
Highest raw rating	1276.3 2025-09-01	1247.2 2025-09-01	1259.3 2025-09-01	1200 2024-02-01
Highest weighted rating	1237.7 2025-09-01	1222.6 2020-08-01	1242.4 2025-09-01	1200 2018-10-01
Highest weighted performance	1200 2018-02-01	1200 2018-02-01	1595.6 2024-07-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1276.3	1247.2	1259.3	1200
Analysis
Rating	1276.3	1247.2	1259.3	1200
Raw rating	1276.3	1247.2	1259.3	1200
Weighted rating	1241.8	1219.7	1244.7
Weighted performance	893.6	887.2	0
K-factor	36	36	36	36
Floor	776.3	747.2	759.3	700
Max/Min rating change allowed	148.7	155	152.4	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	1276.3	1247.2	1259.3	1200
New weighted rating	1245.7	1222.7	1246.9	1200
New weighted performance	892.3	886	0	0
Temp new rating	1276.3	1247.2	1259.3	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1276.3	1247.2	1259.3	1200
New K-factor	36	36	36	36
New floor	776.3	747.2	759.3	700

Item	Main	Standard	Rapid
	0	0	0
	9	5	4
	7	4	3
	0	0	0
	7	7	0
	0	0	0
History	33	26	7

Games since
	Main 16	Standard 9		Rapid 7		Blitz 0
Gender	Male
Age group	U16
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	9	5.5	61.11	94.4	1253.8	1348.3
Standard	5	3	60	85	1271.3	1356.3
Rapid	4	2.5	62.5	106.2	1232	1338.2
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	33	20	60.61	90.2	1202.1	1292.2
Standard	26	14.5	55.77	49	1199.2	1248.2
Rapid	7	5.5	78.57	242.9	1212.8	1455.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1276.3	1247.2	1259.3	1200
2025-09-01	1276.3	1247.2	1259.3	1200
2025-08-01	1246.4	1222.6	1251.1	1200
2025-07-01	1246.4	1222.6	1251.1	1200
2025-06-01	1246.4	1222.6	1251.1	1200
2025-05-01	1246.4	1222.6	1251.1	1200
2025-04-01	1246.4	1222.6	1251.1	1200
2025-03-01	1246.4	1222.6	1251.1	1200
2025-02-01	1246.4	1222.6	1251.1	1200
2025-01-01	1246.4	1222.6	1251.1	1200
2024-12-01	1246.4	1222.6	1251.1	1200
2024-11-01	1246.4	1222.6	1251.1	1200
2024-10-01	1246.4	1222.6	1251.1	1200
2024-09-01	1226.7	1192	1251.1	1200
2024-08-01	1226.7	1192	1251.1	1200
2024-07-01	1193.9	1192	1200	1200
2024-06-01	1193.9	1192	1200	1200
2024-08-01	1193.9	1192	1200	1200
2024-04-01	1193.9	1192	1200	1200
2024-03-01	1193.9	1192	1200	1200
2024-02-01	1193.9	1192	1200	1200
2024-01-01	1193.9	1192	1200	1200
2023-12-01	1193.9	1192	1200	1200
2023-11-01	1193.9	1192	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	Ekurhuleni North Schools Teams 2025 (U15 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
2	Kempton Park Team Clusters LS 2025 (High Schools)	2025-07-26	2025-07-26	Rapid	Ekurhuleni (GE)	4	4	2.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Ekurhuleni North Schools Teams 2025 (U15 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
2	Kempton Park Team Clusters LS 2025 (High Schools)	2025-07-26	2025-07-26	Rapid	Ekurhuleni (GE)	4	4	2.5	Yes	Analysis
3	Ekurhuleni North Schools Finals - Teams 2024 (U15 Open)	2024-08-03	2024-08-03	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis
4	Kempton Park Cluster Teams 2024 (U15)	2024-07-13	2024-07-13	Rapid	Ekurhuleni (GE)	3	3	3	Yes	Analysis
5	Ekurhuleni-North Schools Teams 2022 (U13 Reserves)	2022-08-06	2022-08-06	Standard	Ekurhuleni (GE)	5	3	2	Yes	Analysis
6	ACB Premier 2022 (Primary School)	2022-03-19	2022-03-19	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
7	2018 Gauteng League Final (U9)	2018-08-24	2018-08-24	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
8	Ekurhuleni North District Schools Final 2018 (U9)	2018-08-04	2018-08-04	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis

#	Games	Start				End
1	6	Tournament Ekurhuleni North District Schools Final 2018				Tournament 2018 Gauteng League Final
		date 2018-08-04	rnd 1	type Standard	result 0.5	date 2018-08-24	rnd 1	type Standard	result 1
		Opponent Mchaffie, S (Seth)				Opponent Roets, A (Andre)
2	5	Tournament Kempton Park Cluster Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-07-13	rnd 1	type Rapid	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Krause, R (Ricardo Freitas)				Opponent Taylor, O (Owen)
3	3	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 4	type Rapid	result 1
		Opponent Van Zyl, C (Crystal)				Opponent Kgoebane, L (Lesedi)

#	Games	Start				End
1	6	Tournament Ekurhuleni North District Schools Final 2018				Tournament 2018 Gauteng League Final
		date 2018-08-04	rnd 1	type Standard	result 0.5	date 2018-08-24	rnd 1	type Standard	result 1
		Opponent Mchaffie, S (Seth)				Opponent Roets, A (Andre)
2	2	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 5	type Standard	result 1
		Opponent Nkosi, K (Keitumetse)				Opponent Cloete, N (Nathan)
3	2	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-08-03	rnd 2	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Stoter, A (Anthony)				Opponent Taylor, O (Owen)

#	Games	Start				End
1	3	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 4	type Rapid	result 1
		Opponent Van Zyl, C (Crystal)				Opponent Kgoebane, L (Lesedi)
2	3	Tournament Kempton Park Cluster Teams 2024				Tournament Kempton Park Cluster Teams 2024
		date 2024-07-13	rnd 1	type Rapid	result 1	date 2024-07-13	rnd 3	type Rapid	result 1
		Opponent Krause, R (Ricardo Freitas)				Opponent Stoter, A (Anthony)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Kempton Park Cluster Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-07-13	rnd 1	type Rapid	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Krause, R (Ricardo Freitas)				Opponent Taylor, O (Owen)
2	2	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 5	type Standard	result 1
		Opponent Nkosi, K (Keitumetse)				Opponent Cloete, N (Nathan)
3	2	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Ekurhuleni-North Schools Teams 2022
		date 2022-08-06	rnd 3	type Standard	result 1	date 2022-08-06	rnd 4	type Standard	result 1
		Opponent Kleyn, Z (Zonika)				Opponent Motloung, B (Boishepo)

#	Games	Start				End
1	2	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 5	type Standard	result 1
		Opponent Nkosi, K (Keitumetse)				Opponent Cloete, N (Nathan)
2	2	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-08-03	rnd 2	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Stoter, A (Anthony)				Opponent Taylor, O (Owen)
3	2	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Ekurhuleni-North Schools Teams 2022
		date 2022-08-06	rnd 3	type Standard	result 1	date 2022-08-06	rnd 4	type Standard	result 1
		Opponent Kleyn, Z (Zonika)				Opponent Motloung, B (Boishepo)

#	Games	Start				End
1	3	Tournament Kempton Park Cluster Teams 2024				Tournament Kempton Park Cluster Teams 2024
		date 2024-07-13	rnd 1	type Rapid	result 1	date 2024-07-13	rnd 3	type Rapid	result 1
		Opponent Krause, R (Ricardo Freitas)				Opponent Stoter, A (Anthony)
2	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 4	type Rapid	result 1	date 2025-07-26	rnd 4	type Rapid	result 1
		Opponent Kgoebane, L (Lesedi)				Opponent Kgoebane, L (Lesedi)
3	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 2	type Rapid	result 1
		Opponent Van Zyl, C (Crystal)				Opponent Van Zyl, C (Crystal)

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	Stoter ,A (Anthony)	2	2	425	1	1	425	1	1	425	0	0	0
1	Stoter ,A (Anthony)	2	1096.2	1521.2	1	1200	1521.2	1	1069.2	1521.2	0	0	0
2	Wang ,Y (Yiren)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Wang ,Y (Yiren)	1	1020.9	595.9	1	1016.1	595.9	0	0	0	0	0	0
3	Du Preez ,HC (Henry Cornelius)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Du Preez ,HC (Henry Cornelius)	1	1200	775	1	1200	775	0	0	0	0	0	0
4	Masogo ,M (Mogau Raesibe)	1	1	425	1	1	425	0	0	0	0	0	0
4	Masogo ,M (Mogau Raesibe)	1	1241.2	1666.2	1	1226.9	1666.2	0	0	0	0	0	0
5	Esterhuizen ,JL (Janco)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Esterhuizen ,JL (Janco)	1	1200	775	1	1200	775	0	0	0	0	0	0
6	Smit ,J (Joandre)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
6	Smit ,J (Joandre)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
7	Prevette ,J (Jordan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Prevette ,J (Jordan)	1	1200	775	1	1200	775	0	0	0	0	0	0
8	Harris ,D (Daniel)	1	1	425	1	1	425	0	0	0	0	0	0
8	Harris ,D (Daniel)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Pati ,A (Aayan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Pati ,A (Aayan)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
10	Roets ,A (Andre)	1	1	425	1	1	425	0	0	0	0	0	0
10	Roets ,A (Andre)	1	1183.1	1608.1	1	1180.4	1608.1	0	0	0	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, G (Gideon)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms