Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Westhuizen, J (Janu)

Chess SA id

110093070

FIDE id

Date of birth

2010-09-22 (U16)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-12-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1069.7

Item	Main	Standard	Rapid	Blitz
Rating	1225.3	1212.6	613.6	500
Raw rating	1225.3	1212.6	613.6	500
Weighted rating	1221.7	1209	613.5	500
Weighted performance	932.5	928.8	0	0
Floor	788.8	781.2	500	500
K-factor	36	36	40	40
Min/Max rating change allowed	159.9	162.9	382.4	449.5
Highest rating	1308.5 2023-08-01	1292.5 2023-08-01	1200 2020-01-01	1200 2024-02-01
Highest raw rating	1288.8 2023-10-01	1281.2 2023-10-01	613.6 2024-02-01	500 2024-02-01
Highest weighted rating	1288.8 2024-01-01	1281.2 2024-01-01	613.6 2024-11-01	500 2024-11-01
Highest weighted performance	1308.5 2023-08-01	1292.5 2023-08-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1225.3	1212.6	613.6	500
Analysis
Rating	1225.3	1212.6	613.6	500
Raw rating	1225.3	1212.6	613.6	500
Weighted rating	1221.7	1209	613.5
Weighted performance	932.5	928.8	0
K-factor	36	36	40	40
Floor	788.8	781.2	500	500
Max/Min rating change allowed	159.9	162.9	382.4	449.5
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	1225.3	1212.6	613.6	500
New weighted rating	1221.7	1209	613.5	500
New weighted performance	932.1	928.4	0	0
Temp new rating	1225.3	1212.6	613.6	500
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1225.3	1212.6	613.6	500
New K-factor	36	36	40	40
New floor	788.8	781.2	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	19	19	0
	49	44	5
	15	15	0
	0	0	0
History	173	168	5

Games since
	Main 28	Standard 28		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Sedibeng (GSV)
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	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	167	75	44.91	-43.3	1175.7	1132.5
Standard	162	72	44.44	-47.2	1173.4	1126.2
Rapid	5	3	60	85	1249.8	1334.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1225.3	1212.6	613.6	500
2025-09-01	1225.3	1212.6	613.6	500
2025-08-01	1225.3	1212.6	613.6	500
2025-07-01	1225.3	1212.6	613.6	500
2025-06-01	1225.3	1212.6	613.6	500
2025-05-01	1225.3	1212.6	613.6	500
2025-04-01	1225.3	1212.6	613.6	500
2025-03-01	1225.3	1212.6	613.6	500
2025-02-01	1220.5	1207.6	613.6	500
2025-01-01	1146.9	1129.7	613.6	500
2024-12-01	1196	1179	613.6	500
2024-11-01	1244.7	1238.4	613.6	500
2024-10-01	1227.7	1215.7	613.6	500
2024-09-01	1227.7	1215.7	613.6	500
2024-08-01	1227.7	1215.7	613.6	500
2024-07-01	1227.7	1215.7	613.6	500
2024-06-01	1227.7	1215.7	613.6	500
2024-08-01	1227.7	1215.7	613.6	500
2024-04-01	1227.7	1215.7	613.6	500
2024-03-01	1227.7	1215.7	613.6	500
2024-02-01	1227.7	1215.7	613.6	500
2024-01-01	1252.7	1239.5	613.6	500
2023-12-01	1252.7	1239.5	607.2	500
2023-11-01	1252.7	1239.5	607.2	500

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	Gauteng Inter-Region at UJ 2024 (U18 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	0	Yes	Analysis
2	Queens Gambit Chess Open 2024 (B)	2024-11-23	2024-11-23	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
3	NWU Vaal Chess Open 12 Oct 2024 (D)	2024-10-12	2024-10-12	Standard	Sedibeng (GSV)	5	4	2	Yes	Analysis
4	2024 Gauteng Inter-Region Chess Championship (U14B)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
5	Queens Gambit Chess Open 2023 (C)	2023-11-25	2023-11-25	Standard	Sedibeng (GSV)	5	4	2	Yes	Analysis
6	NWU Vaal Open 2023 (C)	2023-10-14	2023-10-14	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
7	2023 Sedibeng West District Schools Chess Tournament (U13)	2023-08-12	2023-08-12	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
8	Overvaal Ope Jul 2023 (C)	2023-07-22	2023-07-22	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
9	VaalPark Primary Open Chess 2023 (B)	2023-06-16	2023-06-16	Rapid	Sedibeng (GSV)	5	5	3	Yes	Analysis
10	D8 Schools Individuals 2023 (U13 Boys)	2023-05-20	2023-05-20	Standard	West Rand (GWR)	5	5	4.5	Yes	Analysis
11	Valia's Chess Tournament 2023 (C)	2023-05-06	2023-05-06	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
12	Driehoek Open Chess Tournament 2023 (C)	2023-09-13	2023-09-13	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
13	Gauteng Schools Individual Finals 2023 (U13 Boys)	2023-05-26	2023-05-26	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
14	Overvaal Open 2023 (D)	2023-04-15	2023-04-15	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
15	2022 Gauteng Schools Team Championships (U13 Open)	2022-08-27	2022-08-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
16	Dirk De Koster Chess Open 2022 (D)	2022-04-23	2022-04-23	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
17	Midvaal Ope 2022 (D)	2022-01-29	2022-01-29	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
18	Carel`s Open 2020 (C)	2020-02-29	2020-02-29	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
19	AG Visser 2020 (C)	2020-02-22	2020-02-22	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
20	Midvaal Chess Open 2020 (C)	2020-01-25	2020-01-25	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
21	2019 South African Junior Team Championships (U10C)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	5.5	Yes	Analysis
22	Fonteine Ope 2019 (D)	2019-10-19	2019-10-19	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
23	GE vs GSV Inter Regional 2019 (U10B)	2019-10-26	2019-10-26	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
24	Sedibeng Heritageday Open 2019 (B)	2019-09-24	2019-09-24	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
25	D7 Primary School League 2019 (U9)	2019-08-03	2019-08-03	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
26	Drie Riviere Open 2019 (D)	2019-06-08	2019-06-08	Standard	Sedibeng (GSV)	5	4	0	Yes	Analysis
27	Word of Life 2019 (D)	2019-05-11	2019-05-11	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
28	D7 Individuals 2019 (U9 Boys)	2019-05-04	2019-05-04	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
29	Dirk de Koster Chess Open 2019 (E)	2019-04-13	2019-04-13	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
30	AG Visser Skaak Ope 2019 (F)	2019-02-23	2019-02-23	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
31	Fonteine Open 2018 (D)	2018-10-13	2018-10-13	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
32	2018 Sedibeng Summer Open (I)	2018-10-20	2018-10-20	Standard	Sedibeng (GSV)	5	5	0	Yes	Analysis
33	TST-MSA Tournament 2018 (F)	2018-07-21	2018-07-21	Standard	Sedibeng (GSV)	5	4	0.5	Yes	Analysis
34	Heidelberg Skaak Klub 2018 (Team 17)	2018-05-05	2018-05-05	Standard	Sedibeng (GSV)	5	4	1.5	Yes	Analysis

#	Games	Start				End
1	7	Tournament 2019 South African Junior Team Championships				Tournament Midvaal Chess Open 2020
		date 2020-01-06	rnd 4	type Standard	result 1	date 2020-01-25	rnd 3	type Standard	result 1
		Opponent Kurten, K (Kian)				Opponent Walsh, K (Kayleigh)
2	6	Tournament 2023 Sedibeng West District Schools Chess Tournament				Tournament Driehoek Open Chess Tournament 2023
		date 2023-08-12	rnd 3	type Standard	result 1	date 2023-09-13	rnd 3	type Standard	result 0.5
		Opponent Makume, K (Khotso)				Opponent Eberwein, HJ (Heinrich)
3	6	Tournament VaalPark Primary Open Chess 2023				Tournament Overvaal Ope Jul 2023
		date 2023-06-16	rnd 3	type Rapid	result 1	date 2023-07-22	rnd 3	type Standard	result 0.5
		Opponent Sacks, F (Fyren)				Opponent Masilo, R (Rendane)

#	Games	Start				End
1	7	Tournament 2019 South African Junior Team Championships				Tournament Midvaal Chess Open 2020
		date 2020-01-06	rnd 4	type Standard	result 1	date 2020-01-25	rnd 3	type Standard	result 1
		Opponent Kurten, K (Kian)				Opponent Walsh, K (Kayleigh)
2	6	Tournament 2023 Sedibeng West District Schools Chess Tournament				Tournament Driehoek Open Chess Tournament 2023
		date 2023-08-12	rnd 3	type Standard	result 1	date 2023-09-13	rnd 3	type Standard	result 0.5
		Opponent Makume, K (Khotso)				Opponent Eberwein, HJ (Heinrich)
3	6	Tournament Valia's Chess Tournament 2023				Tournament D8 Schools Individuals 2023
		date 2023-05-06	rnd 5	type Standard	result 0.5	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Smith, KE (Kaiden Elljay)				Opponent Zange, C (Caswell Maleke)

#	Games	Start				End
1	3	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 3	type Rapid	result 1	date 2023-06-16	rnd 5	type Rapid	result 0.5
		Opponent Sacks, F (Fyren)				Opponent Odendaal, H (Hayden)
2	1	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 1	type Rapid	result 1	date 2023-06-16	rnd 1	type Rapid	result 1
		Opponent Van As, A (An-Nike)				Opponent Van As, A (An-Nike)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament 2023 Sedibeng West District Schools Chess Tournament				Tournament Driehoek Open Chess Tournament 2023
		date 2023-08-12	rnd 3	type Standard	result 1	date 2023-09-13	rnd 2	type Standard	result 1
		Opponent Makume, K (Khotso)				Opponent Slabbert, A (Albertus)
2	3	Tournament Midvaal Chess Open 2020				Tournament Midvaal Chess Open 2020
		date 2020-01-25	rnd 1	type Standard	result 1	date 2020-01-25	rnd 3	type Standard	result 1
		Opponent Lawrenson, J (Jessica)				Opponent Walsh, K (Kayleigh)
3	3	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-06	rnd 4	type Standard	result 1	date 2020-01-07	rnd 6	type Standard	result 1
		Opponent Kurten, K (Kian)				Opponent Bouwer, P (Pieter)

#	Games	Start				End
1	5	Tournament 2023 Sedibeng West District Schools Chess Tournament				Tournament Driehoek Open Chess Tournament 2023
		date 2023-08-12	rnd 3	type Standard	result 1	date 2023-09-13	rnd 2	type Standard	result 1
		Opponent Makume, K (Khotso)				Opponent Slabbert, A (Albertus)
2	3	Tournament Midvaal Chess Open 2020				Tournament Midvaal Chess Open 2020
		date 2020-01-25	rnd 1	type Standard	result 1	date 2020-01-25	rnd 3	type Standard	result 1
		Opponent Lawrenson, J (Jessica)				Opponent Walsh, K (Kayleigh)
3	3	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-06	rnd 4	type Standard	result 1	date 2020-01-07	rnd 6	type Standard	result 1
		Opponent Kurten, K (Kian)				Opponent Bouwer, P (Pieter)

#	Games	Start				End
1	1	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 3	type Rapid	result 1	date 2023-06-16	rnd 3	type Rapid	result 1
		Opponent Sacks, F (Fyren)				Opponent Sacks, F (Fyren)
2	1	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 1	type Rapid	result 1	date 2023-06-16	rnd 1	type Rapid	result 1
		Opponent Van As, A (An-Nike)				Opponent Van As, A (An-Nike)

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	Odendaal ,H (Hayden)	4	1.5	-106.2	3	1	-141.7	1	0.5	0	0	0	0
1	Odendaal ,H (Hayden)	4	1213.3	1107.1	3	1172.9	1071.7	1	1200	1213.3	0	0	0
2	Kotzee ,A (Armand)	3	0	-425	3	0	-425	0	0	0	0	0	0
2	Kotzee ,A (Armand)	3	1291.8	866.8	3	1277.5	866.8	0	0	0	0	0	0
3	Smith ,KE (Kaiden Elljay)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
3	Smith ,KE (Kaiden Elljay)	3	1220.2	1078.5	3	1231.6	1078.5	0	0	0	0	0	0
4	De Lange ,H (Henro)	3	0	-425	3	0	-425	0	0	0	0	0	0
4	De Lange ,H (Henro)	3	1095.9	670.9	3	1085.5	670.9	0	0	0	0	0	0
5	Visser ,M (Mila)	2	1	0	2	1	0	0	0	0	0	0	0
5	Visser ,M (Mila)	2	1354.8	1354.8	2	1353.7	1354.8	0	0	0	0	0	0
6	Griesel ,W (Willem)	2	2	425	2	2	425	0	0	0	0	0	0
6	Griesel ,W (Willem)	2	1117.2	1542.2	2	1104.8	1542.2	0	0	0	0	0	0
7	Fourie ,L (Lucius)	2	2	425	2	2	425	0	0	0	0	0	0
7	Fourie ,L (Lucius)	2	1089.8	1514.8	2	1071.2	1514.8	0	0	0	0	0	0
8	Mittermaier ,G (Gunther)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Mittermaier ,G (Gunther)	2	1088.2	663.2	2	1101.6	663.2	0	0	0	0	0	0
9	Cronje ,E (Emile)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Cronje ,E (Emile)	2	1215.4	790.4	2	1206.1	790.4	0	0	0	0	0	0
10	Mojaju ,K (Kelebogile)	2	1	0	2	1	0	0	0	0	0	0	0
10	Mojaju ,K (Kelebogile)	2	1112.6	1112.6	2	1104	1112.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

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PLAYER PAGE

Personal

Van Der Westhuizen, J (Janu)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms