Chess South Africa Ratings Database

PLAYER PAGE

Personal

Hartzenberg, J (Joshua)

Chess SA id

1120161645

FIDE id

Date of birth

2012-04-12 (U14)

Gender

Male

Region

Eden (WEG)

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	1190.6	1190.8	1200	1200
Raw rating	1190.6	1190.8	1200	1200
Weighted rating	1188.6	1187.5	1200	1200
Weighted performance	0	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	168.1	168	165.8	165.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1200 2019-12-01	1200 2019-12-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1200 2019-12-01	1200 2019-12-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1190.6	1190.8	1200	1200
Analysis
Rating	1190.6	1190.8	1200	1200
Raw rating	1190.6	1190.8	1200	1200
Weighted rating	1188.6	1187.5	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	168.1	168	165.8	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	1190.6	1190.8	1200	1200
New weighted rating	1188.7	1187.7	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1190.6	1190.8	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1190.6	1190.8	1200	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard
	0	0
	4	4
	4	4
	2	2
	0	0
	0	0
History	10	10

Games since
	Main 8	Standard 8		Rapid 0		Blitz 0
Gender	Male
Age group	U14
Region	Eden (WEG)
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	4	2	50	0	1200.3	1200.3
Standard	4	2	50	0	1200.3	1200.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	10	3.5	35	-127.5	1279.1	1151.6
Standard	10	3.5	35	-127.5	1279.1	1151.6
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1190.6	1190.8	1200	1200
2025-09-01	1190.6	1190.8	1200	1200
2025-08-01	1189	1187.7	1200	1200
2025-07-01	1189	1187.7	1200	1200
2025-06-01	1189	1187.7	1200	1200
2025-05-01	1189	1187.7	1200	1200
2025-04-01	1189	1187.7	1200	1200
2025-03-01	1189	1187.7	1200	1200
2025-02-01	1188.8	1187.5	1200	1200
2025-01-01	1183.8	1182.3	1200	1200
2024-12-01	1183.8	1182.3	1200	1200
2024-11-01	1183.8	1182.3	1200	1200
2024-10-01	1183.8	1182.3	1200	1200
2024-09-01	1183.8	1182.3	1200	1200
2024-08-01	1191.9	1190.6	1200	1200
2024-07-01	1191.9	1190.6	1200	1200
2024-06-01	1191.9	1190.6	1200	1200
2024-08-01	1191.9	1190.6	1200	1200
2024-04-01	1191.9	1190.6	1200	1200
2024-03-01	1191.9	1190.6	1200	1200
2024-02-01	1191.9	1190.6	1200	1200
2024-01-01	1191.9	1190.6	1200	1200
2023-12-01	1191.9	1190.6	1200	1200
2023-11-01	1191.9	1190.6	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	Eden Top Schools 2025 (U13)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	4	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Eden Top Schools 2025 (U13)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	4	2	Yes	Analysis
2	Eden Top Schools 2024 (U15 Open)	2024-08-17	2024-08-17	Standard	Eden (WEG)	5	4	1	Yes	Analysis
3	Eden Top Schools 2023 (U11 Mix)	2023-08-19	2023-08-19	Standard	Eden (WEG)	5	2	0.5	Yes	Analysis

#	Games	Start				End
1	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 4	type Standard	result 1
		Opponent Pretoors, B (Brumilda)				Opponent Pretoors, B (Brumilda)
2	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Garland, T (Tristan Dean)				Opponent Garland, T (Tristan Dean)
3	1	Tournament Eden Top Schools 2024				Tournament Eden Top Schools 2024
		date 2024-08-17	rnd 4	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Uithaler, D (Duraycan)				Opponent Uithaler, D (Duraycan)

#	Games	Start				End
1	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 4	type Standard	result 1
		Opponent Pretoors, B (Brumilda)				Opponent Pretoors, B (Brumilda)
2	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Garland, T (Tristan Dean)				Opponent Garland, T (Tristan Dean)
3	1	Tournament Eden Top Schools 2024				Tournament Eden Top Schools 2024
		date 2024-08-17	rnd 4	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Uithaler, D (Duraycan)				Opponent Uithaler, D (Duraycan)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 4	type Standard	result 1
		Opponent Pretoors, B (Brumilda)				Opponent Pretoors, B (Brumilda)
2	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Garland, T (Tristan Dean)				Opponent Garland, T (Tristan Dean)
3	1	Tournament Eden Top Schools 2024				Tournament Eden Top Schools 2024
		date 2024-08-17	rnd 4	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Uithaler, D (Duraycan)				Opponent Uithaler, D (Duraycan)

#	Games	Start				End
1	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 4	type Standard	result 1	date 2025-08-16	rnd 4	type Standard	result 1
		Opponent Pretoors, B (Brumilda)				Opponent Pretoors, B (Brumilda)
2	1	Tournament Eden Top Schools 2025				Tournament Eden Top Schools 2025
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Garland, T (Tristan Dean)				Opponent Garland, T (Tristan Dean)
3	1	Tournament Eden Top Schools 2024				Tournament Eden Top Schools 2024
		date 2024-08-17	rnd 4	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Uithaler, D (Duraycan)				Opponent Uithaler, D (Duraycan)

No games found.

#	Games	Start				End

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	Plaatjies ,A (Ayren)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Plaatjies ,A (Ayren)	1	1305.2	880.2	1	1339.6	880.2	0	0	0	0	0	0
2	Marx ,M (Marnu)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Marx ,M (Marnu)	1	1473.7	1048.7	1	1459	1048.7	0	0	0	0	0	0
3	Lechuti ,B (Belinda)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Lechuti ,B (Belinda)	1	1200	775	1	1200	775	0	0	0	0	0	0
4	Michaels ,J (Joshua)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Michaels ,J (Joshua)	1	1388	963	1	1432.5	963	0	0	0	0	0	0
5	Botha ,K (Kadija)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
5	Botha ,K (Kadija)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
6	Uithaler ,D (Duraycan)	1	1	425	1	1	425	0	0	0	0	0	0
6	Uithaler ,D (Duraycan)	1	1284.3	1709.3	1	1285.6	1709.3	0	0	0	0	0	0
7	Pretoors ,B (Brumilda)	1	1	425	1	1	425	0	0	0	0	0	0
7	Pretoors ,B (Brumilda)	1	1100.9	1525.9	1	1086	1525.9	0	0	0	0	0	0
8	Garland ,T (Tristan Dean)	1	1	425	1	1	425	0	0	0	0	0	0
8	Garland ,T (Tristan Dean)	1	1195	1620	1	1200	1620	0	0	0	0	0	0
9	Fredericks ,R (Reuel)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Fredericks ,R (Reuel)	1	1398.3	973.3	1	1403.7	973.3	0	0	0	0	0	0
10	Woollatt ,J (Joel)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Woollatt ,J (Joel)	1	1245.5	820.5	1	1251.9	820.5	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Hartzenberg, J (Joshua)

Ratings

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Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms