Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Westhuizen, S (Simeon)

Chess SA id

1130192038

FIDE id

Date of birth

2013-03-22 (U14)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-21

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1177.6

Item	Main	Standard	Rapid	Blitz
Rating	1234.7	1190.2	1375.5	1200
Raw rating	1229.1	1158.6	1375.5	1200
Weighted rating	1234.7	1190.2	1310.8	1200
Weighted performance	1194.5	1075.2	1302.3	0
Floor	786.9	741.4	875.5	700
K-factor	36	36	36	36
Min/Max rating change allowed	159.1	175.9	129.1	165.8
Highest rating	1357.8 2024-02-01	1241.4 2025-04-01	1459.5 2024-02-01	1200 2024-02-01
Highest raw rating	1286.9 2025-04-01	1241.4 2025-04-01	1375.5 2025-09-01	1200 2024-02-01
Highest weighted rating	1286.9 2024-07-01	1241.4 2024-07-01	1314 2024-10-01	1200 2024-02-01
Highest weighted performance	1357.8 2025-04-01	1220.1 2024-06-01	1459.5 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	-2.7	0	0
New rating	1234.7	1187.5	1375.5	1200
Analysis
Rating	1234.7	1190.2	1375.5	1200
Raw rating	1229.1	1158.6	1375.5	1200
Weighted rating	1234.7	1190.2	1310.8
Weighted performance	1194.5	1075.2	1302.3
K-factor	36	36	36	36
Floor	786.9	741.4	875.5	700
Max/Min rating change allowed	159.1	175.9	129.1	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	1229.1	1158.6	1375.5	1200
New weighted rating	1234.7	1187.5	1317.9	1200
New weighted performance	1187.3	1068.7	1293.7	0
Temp new rating	1234.7	1187.5	1375.5	1200
Temp new rating +/-	0	-2.7	0	0
Final new rating +/-	0	-2.7	0	0
New rating	1234.7	1187.5	1375.5	1200
New K-factor	36	36	36	36
New floor	786.9	741.4	875.5	700

Item	Main	Standard	Rapid
	0	0	0
	50	40	10
	35	20	15
	0	0	0
	0	0	0
	0	0	0
History	85	60	25

Games since
	Main 85	Standard 60		Rapid 25		Blitz 0
Gender	Male
Age group	U14
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	3852		1276		213
Male	2919		964		151
U14	746		246		41
U14 Male	524		166		26
Standard
	RSA		Province		Region
Overall	4147		1471		209
Male	3088		1111		157
U14	812		287		40
U14 Male	558		194		29
Rapid
	RSA		Province		Region
Overall	642		109		32
Male	543		88		21
U14	125		15		6
U14 Male	99		11		4
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	50	24.5	49	-8.5	1245.7	1237.2
Standard	40	15.5	38.75	-95.6	1257.6	1161.9
Rapid	10	9	90	340	1198.3	1538.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	85	44	51.76	15	1232.2	1247.2
Standard	60	25	41.67	-70.8	1254.2	1183.4
Rapid	25	19	76	221	1179.5	1400.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1229.1	1158.6	1375.5	1200
2025-09-30	1229.1	1158.6	1375.5	1200
2025-09-01	1239.9	1157.5	1375.5	1200
2025-08-01	1230.4	1197.6	1314	1200
2025-07-01	1232.1	1205.4	1314	1200
2025-06-01	1237.1	1209.9	1314	1200
2025-05-01	1255.6	1213.2	1314	1200
2025-04-01	1286.9	1241.4	1314	1200
2025-03-01	1272.8	1220.3	1314	1200
2025-02-01	1272.8	1220.3	1314	1200
2025-01-01	1244	1220.3	1268.8	1200
2024-12-01	1183.1	1147.6	1268.8	1200
2024-11-01	1183.1	1147.6	1268.8	1200
2024-10-01	1183.1	1147.6	1268.8	1200
2024-09-01	1219.6	1185.4	1268.8	1200
2024-08-01	1219.6	1185.4	1268.8	1200
2024-07-01	1234.8	1201.6	1268.8	1200
2024-09-01	1236	1200	1268.8	1200
2024-05-01	1236	1200	1268.8	1200
2024-04-01	1236	1200	1268.8	1200
2024-03-01	1231	1200	1258.4	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	Ekurhuleni Trial 4 2025 (E)	2025-09-21	2025-09-21	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
2	Benoni Primary School Cluster Teams 2025 (U13B)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis
3	Ekurhuleni Trials 2025 (E)	2025-07-26	2025-07-26	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
4	South African Open 2025 (U14 Open)	2025-07-03	2025-07-05	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
5	Ekurhuleni Trial 2 2025 (E)	2025-06-21	2025-06-21	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
6	Ekurhuleni Trials 2025 (E)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
7	East Rand Chess Club Open 2025 (C)	2025-05-03	2025-05-03	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
8	Benoni Primary School Cluster 12 April 2025 (U13 Open)	2025-04-12	2025-04-12	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
9	East Rand Chess Club Open 2025 (C)	2025-03-01	2025-03-01	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
10	LS Northmead Trials 2025 (U13)	2025-01-25	2025-01-25	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Ekurhuleni Trial 4 2025 (E)	2025-09-21	2025-09-21	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
2	Benoni Primary School Cluster Teams 2025 (U13B)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis
3	Ekurhuleni Trials 2025 (E)	2025-07-26	2025-07-26	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
4	South African Open 2025 (U14 Open)	2025-07-03	2025-07-05	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
5	Ekurhuleni Trial 2 2025 (E)	2025-06-21	2025-06-21	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
6	Ekurhuleni Trials 2025 (E)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
7	East Rand Chess Club Open 2025 (C)	2025-05-03	2025-05-03	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
8	Benoni Primary School Cluster 12 April 2025 (U13 Open)	2025-04-12	2025-04-12	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
9	East Rand Chess Club Open 2025 (C)	2025-03-01	2025-03-01	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
10	LS Northmead Trials 2025 (U13)	2025-01-25	2025-01-25	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
11	Gauteng Inter-Region at UJ 2024 (U12 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
12	Ekurhuleni Trails 3 2024 (U12)	2024-08-24	2024-08-24	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
13	Ekurhuleni Trails 2 2024 (U12)	2024-07-27	2024-07-27	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
14	Ekurhuleni Trails 1 2024 (U12)	2024-06-01	2024-06-01	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
15	Ekurhuleni North Chess Club Open Tournament 2024 (D)	2024-03-02	2024-03-02	Rapid	Ehlanzeni (MEN)	7	6	3	Yes	Analysis
16	Benoni Primary School Cluster Individuals 2024 (U11 Boys)	2024-03-09	2024-03-09	Rapid	Ekurhuleni (GE)	5	4	3	Yes	Analysis
17	Laerskool Northmead Proewe 2024 (U11)	2024-02-10	2024-02-10	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis

#	Games	Start				End
1	5	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Maribana, P (Potledi)				Opponent Du Preez, D (Daniel)
2	5	Tournament Gauteng Inter-Region at UJ 2024				Tournament LS Northmead Trials 2025
		date 2024-12-07	rnd 2	type Standard	result 1	date 2025-01-25	rnd 1	type Rapid	result 1
		Opponent Mahale, A (Agastya)				Opponent Lehanie, R (Ryan)
3	4	Tournament LS Northmead Trials 2025				Tournament East Rand Chess Club Open 2025
		date 2025-01-25	rnd 3	type Rapid	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Swanevelder, Z (Zianey)				Opponent Motloung, R (Relebohile)

#	Games	Start				End
1	5	Tournament Gauteng Inter-Region at UJ 2024				Tournament East Rand Chess Club Open 2025
		date 2024-12-07	rnd 2	type Standard	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Mahale, A (Agastya)				Opponent Motloung, R (Relebohile)
2	3	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 3	type Standard	result 1	date 2025-05-03	rnd 5	type Standard	result 0.5
		Opponent Cronje, K (Keegan)				Opponent Van Der Schyff, M (Mila-Ne)
3	3	Tournament East Rand Chess Club Open 2025				Tournament Benoni Primary School Cluster 12 April 2025
		date 2025-03-01	rnd 5	type Standard	result 1	date 2025-04-12	rnd 2	type Standard	result 1
		Opponent Van Den Berg, L (Landon)				Opponent Nadeson, T (Tyler)

#	Games	Start				End
1	8	Tournament LS Northmead Trials 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-01-25	rnd 3	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Swanevelder, Z (Zianey)				Opponent Du Preez, D (Daniel)
2	4	Tournament Benoni Primary School Cluster Individuals 2024				Tournament LS Northmead Trials 2025
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2025-01-25	rnd 1	type Rapid	result 1
		Opponent Oates, G (Gareth)				Opponent Lehanie, R (Ryan)
3	4	Tournament Laerskool Northmead Proewe 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-02-10	rnd 4	type Rapid	result 1	date 2024-03-02	rnd 3	type Rapid	result 1
		Opponent Labuschagne, M (Mienke)				Opponent Theron, F (Francois)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Maribana, P (Potledi)				Opponent Du Preez, D (Daniel)
2	5	Tournament Gauteng Inter-Region at UJ 2024				Tournament LS Northmead Trials 2025
		date 2024-12-07	rnd 2	type Standard	result 1	date 2025-01-25	rnd 1	type Rapid	result 1
		Opponent Mahale, A (Agastya)				Opponent Lehanie, R (Ryan)
3	4	Tournament LS Northmead Trials 2025				Tournament East Rand Chess Club Open 2025
		date 2025-01-25	rnd 3	type Rapid	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Swanevelder, Z (Zianey)				Opponent Motloung, R (Relebohile)

#	Games	Start				End
1	5	Tournament Gauteng Inter-Region at UJ 2024				Tournament East Rand Chess Club Open 2025
		date 2024-12-07	rnd 2	type Standard	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Mahale, A (Agastya)				Opponent Motloung, R (Relebohile)
2	3	Tournament East Rand Chess Club Open 2025				Tournament Benoni Primary School Cluster 12 April 2025
		date 2025-03-01	rnd 5	type Standard	result 1	date 2025-04-12	rnd 2	type Standard	result 1
		Opponent Van Den Berg, L (Landon)				Opponent Nadeson, T (Tyler)
3	2	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 3	type Standard	result 1	date 2025-05-03	rnd 4	type Standard	result 1
		Opponent Cronje, K (Keegan)				Opponent Olivier, T (Tiaan)

#	Games	Start				End
1	8	Tournament LS Northmead Trials 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-01-25	rnd 3	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Swanevelder, Z (Zianey)				Opponent Du Preez, D (Daniel)
2	4	Tournament Benoni Primary School Cluster Individuals 2024				Tournament LS Northmead Trials 2025
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2025-01-25	rnd 1	type Rapid	result 1
		Opponent Oates, G (Gareth)				Opponent Lehanie, R (Ryan)
3	4	Tournament Laerskool Northmead Proewe 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-02-10	rnd 4	type Rapid	result 1	date 2024-03-02	rnd 3	type Rapid	result 1
		Opponent Labuschagne, M (Mienke)				Opponent Theron, F (Francois)

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	Swanevelder ,Z (Zianey)	5	5	425	2	2	425	3	3	425	0	0	0
1	Swanevelder ,Z (Zianey)	5	1068.8	1493.8	2	1080.6	1493.8	3	1170.6	1493.8	0	0	0
2	Motloung ,R (Relebohile)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
2	Motloung ,R (Relebohile)	4	1212.7	1425.2	4	1214.3	1425.2	0	0	0	0	0	0
3	Theron ,F (Francois)	4	2	0	2	0	-425	2	2	425	0	0	0
3	Theron ,F (Francois)	4	1174.3	1174.3	2	1182.6	749.3	2	1184.9	1599.3	0	0	0
4	Matamela ,M (Mukovhe)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
4	Matamela ,M (Mukovhe)	3	1141	1282.7	3	1184.2	1282.7	0	0	0	0	0	0
5	Shaik ,H (Haneef)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Shaik ,H (Haneef)	2	1421.4	996.4	2	1376.8	996.4	0	0	0	0	0	0
6	Van Den Berg ,L (Landon)	2	1	0	2	1	0	0	0	0	0	0	0
6	Van Den Berg ,L (Landon)	2	1142.4	1142.4	2	1106.3	1142.4	0	0	0	0	0	0
7	Mojapelo ,D (Davey)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Mojapelo ,D (Davey)	2	1594.4	1169.4	2	1616.3	1169.4	0	0	0	0	0	0
8	Fox ,C (Carter)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Fox ,C (Carter)	2	1209	784	2	1233.2	784	0	0	0	0	0	0
9	Gadney ,L (Liam)	2	1	0	1	1	425	1	0	-425	0	0	0
9	Gadney ,L (Liam)	2	1179.2	1179.2	1	1178.5	1604.2	1	1197.1	754.2	0	0	0
10	Senthilkumar ,S (Sakalesh)	2	0	-425	1	0	-425	1	0	-425	0	0	0
10	Senthilkumar ,S (Sakalesh)	2	1349.5	924.5	1	1463.4	924.5	1	1200	924.5	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Van Der Westhuizen, S (Simeon)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms