Chess South Africa Ratings Database

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Personal

Grobler, S (Stefan)

Chess SA id

103011356

FIDE id

Date of birth

2003-04-24 (Adult)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2020-03-14

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1433.5	1425.1	1222.3	1253
Raw rating	1433.5	1425.1	1222.3	1253
Weighted rating	1433.5	1425.1	1222.3	1252.8
Weighted performance	412.1	410.6	0	0
Floor	1011.8	1007.6	757.2	754
K-factor	32	32	36	36
Min/Max rating change allowed	118.9	120.3	160.6	153.8
Highest rating	1528 2019-10-01	1523.7 2019-10-01	1257.2 2018-06-01	1254 2018-01-01
Highest raw rating	1511.8 2019-11-01	1507.6 2019-11-01	1257.2 2018-06-01	1254 2018-01-01
Highest weighted rating	1511.8 2021-07-01	1507.6 2021-07-01	1257.2 2019-05-01	1254 2018-01-01
Highest weighted performance	1528 2019-10-01	1523.7 2019-10-01	1243 2018-05-01	1202 2018-05-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1433.5	1425.1	1222.3	1253
Analysis
Rating	1433.5	1425.1	1222.3	1253
Raw rating	1433.5	1425.1	1222.3	1253
Weighted rating	1433.5	1425.1	1222.3
Weighted performance	412.1	410.6	0
K-factor	32	32	36	36
Floor	1011.8	1007.6	757.2	754
Max/Min rating change allowed	118.9	120.3	160.6	153.8
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	1433.5	1425.1	1222.3	1253
New weighted rating	1433.5	1425.1	1222.3	1252.9
New weighted performance	411.6	410.2	0	0
Temp new rating	1433.5	1425.1	1222.3	1253
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1433.5	1425.1	1222.3	1253
New K-factor	32	32	36	36
New floor	1011.8	1007.6	757.2	754

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
History	710	659	20	31

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	218	124	56.88	58.5	1184.8	1243.3
Standard	181	105	58.01	68.1	1181.1	1249.2
Rapid	20	10	50	0	1237.2	1237.2
Blitz	17	9	52.94	25	1162.3	1187.3

Date	Main	Standard	Rapid	Blitz
2025-09-30	1433.5	1425.1	1222.3	1253
2025-09-01	1433.5	1425.1	1222.3	1253
2025-08-01	1433.5	1425.1	1222.3	1253
2025-07-01	1433.5	1425.1	1222.3	1253
2025-06-01	1433.5	1425.1	1222.3	1253
2025-05-01	1433.5	1425.1	1222.3	1253
2025-04-01	1433.5	1425.1	1222.3	1253
2025-03-01	1433.5	1425.1	1222.3	1253
2025-02-01	1433.5	1425.1	1222.3	1253
2025-01-01	1433.5	1425.1	1222.3	1253
2024-12-01	1433.5	1425.1	1222.3	1253
2024-11-01	1433.5	1425.1	1222.3	1253
2024-10-01	1433.5	1425.1	1222.3	1253
2024-09-01	1433.5	1425.1	1222.3	1253
2024-08-01	1433.5	1425.1	1222.3	1253
2024-07-01	1433.5	1425.1	1222.3	1253
2024-06-01	1433.5	1425.1	1222.3	1253
2024-08-01	1433.5	1425.1	1222.3	1253
2024-04-01	1433.5	1425.1	1222.3	1253
2024-03-01	1433.5	1425.1	1222.3	1253
2024-02-01	1433.5	1425.1	1222.3	1253
2024-01-01	1433.5	1425.1	1222.3	1253
2023-12-01	1433.5	1425.1	1222.3	1232
2023-11-01	1433.5	1425.1	1222.3	1232

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	Heidelberg Klub Round Robin 2020 (A)	2020-03-14	2020-03-14	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis
2	Heidelberg Open 2020 (B)	2020-02-01	2020-02-01	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
3	AG Visser 2020 (A+B)	2020-02-22	2020-02-22	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
4	2019 South African Junior Team Championships (U18A)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
5	Eagles Open 2019 (A)	2019-11-23	2019-11-23	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	Sedibeng DF Malherbe Open 2019 (A)	2019-10-12	2019-10-12	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
7	GE vs GSV Inter Regional 2019 (U18B)	2019-10-26	2019-10-26	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
8	Sedibeng Heritageday Open 2019 (A)	2019-09-24	2019-09-24	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
9	2019 Gauteng School League Finals (U19 Open)	2019-08-24	2019-08-24	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
10	D7 High School League 2019 (U19)	2019-08-03	2019-08-03	Standard	Sedibeng (GSV)	10	8	8	Yes	Analysis
11	TST-MSA Chess Open 2019 (A)	2019-07-20	2019-07-20	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
12	Eureka Chess Open 2019 (B)	2019-07-27	2019-07-27	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
13	Overvaal Chess Open 2019 (A)	2019-06-15	2019-06-15	Standard	Sedibeng (GSV)	5	5	1.5	Yes	Analysis
14	Drie Riviere Open 2019 (A)	2019-06-08	2019-06-08	Standard	Sedibeng (GSV)	5	5	1.5	Yes	Analysis
15	2019 SWVG Arnold Classic (Rapid Open)	2019-05-18	2019-05-19	Rapid	Tshwane (GTP)	10	10	5	Yes	Analysis
16	2019 Gauteng Secondary Schools Individual Chess Championships (U18 Boys)	2019-05-25	2019-05-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
17	Word of Life 2019 (A)	2019-05-11	2019-05-11	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
18	D7 Individuals 2019 (U17 Boys)	2019-05-04	2019-05-04	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
19	Dirk de Koster Chess Open 2019 (A)	2019-04-13	2019-04-13	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
20	South African Junior Team Championships 2018 (U16C)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	3	Yes	Analysis
21	2018 Interregion Sedibeng vs Ekurhuleni (K)	2018-11-03	2018-11-03	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
22	2018 Sedibeng Summer Open (C)	2018-10-20	2018-10-20	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
23	Eureka Chess Open 2018 (A)	2018-09-29	2018-09-29	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
24	Dr Pieter Hangelbroek Ope 2018 (A+B)	2018-09-01	2018-09-01	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
25	2018 Gauteng League Final (U19)	2018-08-25	2018-08-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
26	Heidelberg Klub Round Robin 2018 (Team 2)	2018-08-18	2018-08-18	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
27	Broadland`s Knights Chess Open 2018 (A)	2018-06-16	2018-06-16	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
28	SWVG Arnold Classic Rapid & Blitz 2018 (Rapid Open)	2018-05-19	2018-05-20	Rapid	Tshwane (GTP)	10	10	5	Yes	Analysis
29	SWVG Arnold Classic Rapid & Blitz 2018 (Blitz Open)	2018-05-19	2018-05-20	Blitz	Tshwane (GTP)	10	10	5	Yes	Analysis
30	2018 Gauteng Secondary Schools Individual Chess Championships (U15 Boys)	2018-05-26	2018-05-26	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
31	Heidelberg Skaak Klub 2018 (Team 3)	2018-05-05	2018-05-05	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
32	2018 D7 Teams (U19)	2018-04-21	2018-04-21	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
33	Carels Open 2018 (B)	2018-03-03	2018-03-03	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
34	2018 Volkskool Open (B)	2018-02-17	2018-02-17	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
35	2018 - D7 High Schools Individuals (U15 Boys)	2018-02-24	2018-02-24	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
36	South African Junior Blitz 2017 Championships (B)	2018-01-07	2018-01-07	Blitz	4 Knights (4K)	7	7	4	Yes	Analysis
37	South African Junior Wildcard Championships 2017 (U16 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	7	2	Yes	Analysis
38	South African Junior Team Championships 2017 (U16C)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	1.5	Yes	Analysis

#	Games	Start				End
1	8	Tournament D7 High School League 2019				Tournament D7 High School League 2019
		date 2019-08-03	rnd 2	type Standard	result 1	date 2019-08-03	rnd 10	type Standard	result 1
		Opponent Anderson, T (Tiaan)				Opponent Matlaletso, L (Lesedi)
2	8	Tournament 2018 Volkskool Open				Tournament Carels Open 2018
		date 2018-02-17	rnd 5	type Standard	result 1	date 2018-03-03	rnd 2	type Standard	result 1
		Opponent Van Niekerk, R (Ronita)				Opponent Sithole, W (Welcome)
3	7	Tournament Carels Open 2018				Tournament Heidelberg Skaak Klub 2018
		date 2018-03-03	rnd 5	type Standard	result 1	date 2018-05-05	rnd 1	type Standard	result 1
		Opponent Mashala, ML (Maphula)				Opponent Du Toit, C (Conrad)

#	Games	Start				End
1	8	Tournament D7 High School League 2019				Tournament D7 High School League 2019
		date 2019-08-03	rnd 2	type Standard	result 1	date 2019-08-03	rnd 10	type Standard	result 1
		Opponent Anderson, T (Tiaan)				Opponent Matlaletso, L (Lesedi)
2	8	Tournament 2018 Volkskool Open				Tournament Carels Open 2018
		date 2018-02-17	rnd 5	type Standard	result 1	date 2018-03-03	rnd 2	type Standard	result 1
		Opponent Van Niekerk, R (Ronita)				Opponent Sithole, W (Welcome)
3	7	Tournament Carels Open 2018				Tournament Heidelberg Skaak Klub 2018
		date 2018-03-03	rnd 5	type Standard	result 1	date 2018-05-05	rnd 1	type Standard	result 1
		Opponent Mashala, ML (Maphula)				Opponent Du Toit, C (Conrad)

#	Games	Start				End
1	4	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-18	rnd 5	type Rapid	result 1	date 2019-05-19	rnd 8	type Rapid	result 1
		Opponent Strauss, M (Monique)				Opponent Pillay, M (Mikhael)
2	2	Tournament SWVG Arnold Classic Rapid & Blitz 2018				Tournament SWVG Arnold Classic Rapid & Blitz 2018
		date 2018-05-19	rnd 5	type Rapid	result 1	date 2018-05-19	rnd 6	type Rapid	result 1
		Opponent Elliott, C (Cayden)				Opponent Tarafdar, M (Mohammad)
3	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 10	type Rapid	result 1	date 2019-05-19	rnd 10	type Rapid	result 1
		Opponent Li, J (Joseph)				Opponent Li, J (Joseph)

#	Games	Start				End
1	3	Tournament SWVG Arnold Classic Rapid & Blitz 2018				Tournament SWVG Arnold Classic Rapid & Blitz 2018
		date 2018-05-19	rnd 3	type Blitz	result 1	date 2018-05-19	rnd 5	type Blitz	result 1
		Opponent Elliott, D (Dwaine)				Opponent Maree, B (Braden)
2	2	Tournament SWVG Arnold Classic Rapid & Blitz 2018				Tournament SWVG Arnold Classic Rapid & Blitz 2018
		date 2018-05-20	rnd 8	type Blitz	result 1	date 2018-05-20	rnd 9	type Blitz	result 1
		Opponent Naidoo, GR (Gerard)				Opponent De Lange, G (George)
3	2	Tournament South African Junior Blitz 2017 Championships				Tournament South African Junior Blitz 2017 Championships
		date 2018-01-07	rnd 5	type Blitz	result 1	date 2018-01-07	rnd 6	type Blitz	result 1
		Opponent Woest, M (Megan)				Opponent Barnard, S (Schalk)

#	Games	Start				End
1	8	Tournament D7 High School League 2019				Tournament D7 High School League 2019
		date 2019-08-03	rnd 2	type Standard	result 1	date 2019-08-03	rnd 10	type Standard	result 1
		Opponent Anderson, T (Tiaan)				Opponent Matlaletso, L (Lesedi)
2	8	Tournament 2018 Volkskool Open				Tournament Carels Open 2018
		date 2018-02-17	rnd 5	type Standard	result 1	date 2018-03-03	rnd 2	type Standard	result 1
		Opponent Van Niekerk, R (Ronita)				Opponent Sithole, W (Welcome)
3	7	Tournament Carels Open 2018				Tournament Heidelberg Skaak Klub 2018
		date 2018-03-03	rnd 5	type Standard	result 1	date 2018-05-05	rnd 1	type Standard	result 1
		Opponent Mashala, ML (Maphula)				Opponent Du Toit, C (Conrad)

#	Games	Start				End
1	8	Tournament D7 High School League 2019				Tournament D7 High School League 2019
		date 2019-08-03	rnd 2	type Standard	result 1	date 2019-08-03	rnd 10	type Standard	result 1
		Opponent Anderson, T (Tiaan)				Opponent Matlaletso, L (Lesedi)
2	8	Tournament 2018 Volkskool Open				Tournament Carels Open 2018
		date 2018-02-17	rnd 5	type Standard	result 1	date 2018-03-03	rnd 2	type Standard	result 1
		Opponent Van Niekerk, R (Ronita)				Opponent Sithole, W (Welcome)
3	7	Tournament Carels Open 2018				Tournament Heidelberg Skaak Klub 2018
		date 2018-03-03	rnd 5	type Standard	result 1	date 2018-05-05	rnd 1	type Standard	result 1
		Opponent Mashala, ML (Maphula)				Opponent Du Toit, C (Conrad)

#	Games	Start				End
1	2	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-18	rnd 7	type Rapid	result 1	date 2019-05-19	rnd 8	type Rapid	result 1
		Opponent Mkhwanazi, AK (Ayanda)				Opponent Pillay, M (Mikhael)
2	2	Tournament SWVG Arnold Classic Rapid & Blitz 2018				Tournament SWVG Arnold Classic Rapid & Blitz 2018
		date 2018-05-19	rnd 5	type Rapid	result 1	date 2018-05-19	rnd 6	type Rapid	result 1
		Opponent Elliott, C (Cayden)				Opponent Tarafdar, M (Mohammad)
3	1	Tournament 2019 SWVG Arnold Classic				Tournament 2019 SWVG Arnold Classic
		date 2019-05-19	rnd 10	type Rapid	result 1	date 2019-05-19	rnd 10	type Rapid	result 1
		Opponent Li, J (Joseph)				Opponent Li, J (Joseph)

#	Games	Start				End
1	3	Tournament SWVG Arnold Classic Rapid & Blitz 2018				Tournament SWVG Arnold Classic Rapid & Blitz 2018
		date 2018-05-19	rnd 3	type Blitz	result 1	date 2018-05-19	rnd 5	type Blitz	result 1
		Opponent Elliott, D (Dwaine)				Opponent Maree, B (Braden)
2	2	Tournament SWVG Arnold Classic Rapid & Blitz 2018				Tournament SWVG Arnold Classic Rapid & Blitz 2018
		date 2018-05-20	rnd 8	type Blitz	result 1	date 2018-05-20	rnd 9	type Blitz	result 1
		Opponent Naidoo, GR (Gerard)				Opponent De Lange, G (George)
3	2	Tournament South African Junior Blitz 2017 Championships				Tournament South African Junior Blitz 2017 Championships
		date 2018-01-07	rnd 5	type Blitz	result 1	date 2018-01-07	rnd 6	type Blitz	result 1
		Opponent Woest, M (Megan)				Opponent Barnard, S (Schalk)

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	Schonken ,SDT (Stefan)	6	4.5	212.5	4	3	212.5	2	1.5	212.5	0	0	0
1	Schonken ,SDT (Stefan)	6	1035.8	1248.2	4	1039.8	1248.2	2	865.8	1248.2	0	0	0
2	Theron ,A (Andre)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
2	Theron ,A (Andre)	3	1551.7	1410	3	1549.5	1410	0	0	0	0	0	0
3	Pule ,L (Lesedi)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
3	Pule ,L (Lesedi)	3	1295.1	1436.8	3	1298.6	1436.8	0	0	0	0	0	0
4	Visser ,S (Shane)	3	0	-425	3	0	-425	0	0	0	0	0	0
4	Visser ,S (Shane)	3	1371.6	946.6	3	1370.5	946.6	0	0	0	0	0	0
5	Lingard ,B (Bevan)	3	0	-425	3	0	-425	0	0	0	0	0	0
5	Lingard ,B (Bevan)	3	1300.1	875.1	3	1297.7	875.1	0	0	0	0	0	0
6	Muller ,M (Mike)	3	3	425	3	3	425	0	0	0	0	0	0
6	Muller ,M (Mike)	3	1031.5	1456.5	3	1022.7	1456.5	0	0	0	0	0	0
7	Jonker ,J (Jaen-Pierre)	2	2	425	2	2	425	0	0	0	0	0	0
7	Jonker ,J (Jaen-Pierre)	2	1312.4	1737.4	2	1307.1	1737.4	0	0	0	0	0	0
8	Swelinkomo ,ME (Mpumelelo Ernest)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Swelinkomo ,ME (Mpumelelo Ernest)	2	1256.4	831.4	2	1258.9	831.4	0	0	0	0	0	0
9	Goosen ,M (Mignon)	2	2	425	2	2	425	0	0	0	0	0	0
9	Goosen ,M (Mignon)	2	1208.7	1633.7	2	1196.4	1633.7	0	0	0	0	0	0
10	Chibase ,N (Nkosana)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Chibase ,N (Nkosana)	2	1649	1224	2	1643.1	1224	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Grobler, S (Stefan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms