Chess South Africa Ratings Database

PLAYER PAGE

Personal

Rosenberg, Z (Zachary)

Chess SA id

108069276

FIDE id

Date of birth

2008-01-25 (U18)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2019-09-22

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1220.8	1199.2	756.8	756.8
Raw rating	1220.8	1199.2	756.8	756.8
Weighted rating	1220.8	1199.2	756.8	756.8
Weighted performance	251.8	248.7	0	0
Floor	777.5	765.1	500	500
K-factor	36	36	40	40
Min/Max rating change allowed	161	166	311.8	311.8
Highest rating	1291.6 2019-05-01	1279.1 2019-05-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1277.5 2019-06-01	1265.1 2019-06-01	756.8 2024-02-01	756.8 2024-02-01
Highest weighted rating	1277.5 2020-12-01	1265.1 2020-09-01	756.8 2024-11-01	756.8 2024-11-01
Highest weighted performance	1291.6 2019-05-01	1279.1 2019-05-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1220.8	1199.2	756.8	756.8
Analysis
Rating	1220.8	1199.2	756.8	756.8
Raw rating	1220.8	1199.2	756.8	756.8
Weighted rating	1220.8	1199.2	756.8
Weighted performance	251.8	248.7	0
K-factor	36	36	40	40
Floor	777.5	765.1	500	500
Max/Min rating change allowed	161	166	311.8	311.8
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	1220.8	1199.2	756.8	756.8
New weighted rating	1220.8	1199.2	756.8	756.8
New weighted performance	244.7	241.6	0	0
Temp new rating	1220.8	1199.2	756.8	756.8
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1220.8	1199.2	756.8	756.8
New K-factor	36	36	40	40
New floor	777.5	765.1	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	212	121	91

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	64	39.5	61.72	99.6	1088.4	1188.1
Standard	64	39.5	61.72	99.6	1088.4	1188.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1220.8	1199.2	756.8	756.8
2025-09-30	1220.8	1199.2	756.8	756.8
2025-09-01	1220.8	1199.2	756.8	756.8
2025-08-01	1220.8	1199.2	756.8	756.8
2025-07-01	1220.8	1199.2	756.8	756.8
2025-06-01	1220.8	1199.2	756.8	756.8
2025-05-01	1220.8	1199.2	756.8	756.8
2025-04-01	1220.8	1199.2	756.8	756.8
2025-03-01	1220.8	1199.2	756.8	756.8
2025-02-01	1220.8	1199.2	756.8	756.8
2025-01-01	1220.8	1199.2	756.8	756.8
2024-12-01	1220.8	1199.2	756.8	756.8
2024-11-01	1220.8	1199.2	756.8	756.8
2024-10-01	1220.8	1199.2	756.8	756.8
2024-09-01	1220.8	1199.2	756.8	756.8
2024-08-01	1220.8	1199.2	756.8	756.8
2024-07-01	1220.8	1199.2	756.8	756.8
2024-09-01	1220.8	1199.2	756.8	756.8
2024-05-01	1220.8	1199.2	756.8	756.8
2024-04-01	1220.8	1199.2	756.8	756.8
2024-03-01	1220.8	1199.2	756.8	756.8
2024-02-01	1220.8	1199.2	756.8	756.8
2024-01-01	1220.8	1199.2	756.8	756.8
2023-12-01	1220.8	1199.2	756.8	756.8

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	2019 Western Cape Closed Chess Championships (D)	2019-09-21	2019-09-22	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
2	Curro Durbanville Chess Tournament 2019 (Premier)	2019-08-23	2019-08-24	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
3	Stellenberg Youth Chess Championship 2019 (D)	2019-05-01	2019-05-01	Standard	Cape Town (WCT)	5	5	4	Yes	Analysis
4	Metro School Chess Closed Individual Trials 2019 (U11 Boys)	2019-03-01	2019-03-02	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
5	2019 Central District Schools Trials (U11)	2019-02-01	2019-02-02	Standard	Cape Town (WCT)	6	5	3	Yes	Analysis
6	Paul Roos Open Championship 2018 (C)	2018-09-22	2018-09-23	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
7	Stellenberg Youth Chess Champs 2018 (C)	2018-06-22	2018-06-23	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
8	Western Cape Schools Individuals 2018 (U11 Boys)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	6	3	Yes	Analysis
9	2018 WP Schools Closed Trials (U11 Boys)	2018-03-09	2018-03-10	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
10	2018 Central District Trials (U11)	2018-02-02	2018-02-03	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
11	South African Junior Team Championships 2017 (U10B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	6	4.5	Yes	Analysis

#	Games	Start				End
1	7	Tournament South African Junior Team Championships 2017				Tournament 2018 Central District Trials
		date 2018-01-04	rnd 2	type Standard	result 1	date 2018-02-02	rnd 2	type Standard	result 1
		Opponent Hattingh, E (Eckhard)				Opponent Padayachy, S (Shreya)
2	4	Tournament Stellenberg Youth Chess Championship 2019				Tournament Stellenberg Youth Chess Championship 2019
		date 2019-05-01	rnd 1	type Standard	result 1	date 2019-05-01	rnd 4	type Standard	result 1
		Opponent Selzer, A (Alexia)				Opponent Lau, C (Callum)
3	4	Tournament Stellenberg Youth Chess Champs 2018				Tournament Paul Roos Open Championship 2018
		date 2018-06-23	rnd 4	type Standard	result 1	date 2018-09-22	rnd 1	type Standard	result 1
		Opponent Winshaw, B (Bates)				Opponent Lackay, L (Leane)

#	Games	Start				End
1	7	Tournament South African Junior Team Championships 2017				Tournament 2018 Central District Trials
		date 2018-01-04	rnd 2	type Standard	result 1	date 2018-02-02	rnd 2	type Standard	result 1
		Opponent Hattingh, E (Eckhard)				Opponent Padayachy, S (Shreya)
2	4	Tournament Stellenberg Youth Chess Championship 2019				Tournament Stellenberg Youth Chess Championship 2019
		date 2019-05-01	rnd 1	type Standard	result 1	date 2019-05-01	rnd 4	type Standard	result 1
		Opponent Selzer, A (Alexia)				Opponent Lau, C (Callum)
3	4	Tournament Stellenberg Youth Chess Champs 2018				Tournament Paul Roos Open Championship 2018
		date 2018-06-23	rnd 4	type Standard	result 1	date 2018-09-22	rnd 1	type Standard	result 1
		Opponent Winshaw, B (Bates)				Opponent Lackay, L (Leane)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Stellenberg Youth Chess Championship 2019				Tournament Stellenberg Youth Chess Championship 2019
		date 2019-05-01	rnd 1	type Standard	result 1	date 2019-05-01	rnd 4	type Standard	result 1
		Opponent Selzer, A (Alexia)				Opponent Lau, C (Callum)
2	4	Tournament Stellenberg Youth Chess Champs 2018				Tournament Paul Roos Open Championship 2018
		date 2018-06-23	rnd 4	type Standard	result 1	date 2018-09-22	rnd 1	type Standard	result 1
		Opponent Winshaw, B (Bates)				Opponent Lackay, L (Leane)
3	3	Tournament Curro Durbanville Chess Tournament 2019				Tournament Curro Durbanville Chess Tournament 2019
		date 2019-08-23	rnd 2	type Standard	result 1	date 2019-08-24	rnd 4	type Standard	result 1
		Opponent Viljoen, W (Wynand)				Opponent Vermeulen, I (Inge)

#	Games	Start				End
1	4	Tournament Stellenberg Youth Chess Championship 2019				Tournament Stellenberg Youth Chess Championship 2019
		date 2019-05-01	rnd 1	type Standard	result 1	date 2019-05-01	rnd 4	type Standard	result 1
		Opponent Selzer, A (Alexia)				Opponent Lau, C (Callum)
2	4	Tournament Stellenberg Youth Chess Champs 2018				Tournament Paul Roos Open Championship 2018
		date 2018-06-23	rnd 4	type Standard	result 1	date 2018-09-22	rnd 1	type Standard	result 1
		Opponent Winshaw, B (Bates)				Opponent Lackay, L (Leane)
3	3	Tournament Curro Durbanville Chess Tournament 2019				Tournament Curro Durbanville Chess Tournament 2019
		date 2019-08-23	rnd 2	type Standard	result 1	date 2019-08-24	rnd 4	type Standard	result 1
		Opponent Viljoen, W (Wynand)				Opponent Vermeulen, I (Inge)

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	Viljoen ,W (Wynand)	2	2	425	2	2	425	0	0	0	0	0	0
1	Viljoen ,W (Wynand)	2	1132.4	1557.4	2	1123.7	1557.4	0	0	0	0	0	0
2	Lau ,C (Callum)	2	1	0	2	1	0	0	0	0	0	0	0
2	Lau ,C (Callum)	2	1258.4	1258.4	2	1252.9	1258.4	0	0	0	0	0	0
3	Baruch ,L (Liam)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Baruch ,L (Liam)	2	1338.4	913.4	2	1317.7	913.4	0	0	0	0	0	0
4	Swanepoel ,SD (Samuel Dane)	1	1	425	1	1	425	0	0	0	0	0	0
4	Swanepoel ,SD (Samuel Dane)	1	587.6	1012.6	1	605.6	1012.6	0	0	0	0	0	0
5	Lackay ,L (Leane)	1	1	425	1	1	425	0	0	0	0	0	0
5	Lackay ,L (Leane)	1	1102.7	1527.7	1	1073.6	1527.7	0	0	0	0	0	0
6	Nel ,MD (Markus Daniel)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Nel ,MD (Markus Daniel)	1	1127.1	702.1	1	1031.6	702.1	0	0	0	0	0	0
7	Jonkers ,T (Tristan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Jonkers ,T (Tristan)	1	1208.2	783.2	1	1218.9	783.2	0	0	0	0	0	0
8	Li ,T (Traynor)	1	1	425	1	1	425	0	0	0	0	0	0
8	Li ,T (Traynor)	1	1178.5	1603.5	1	1056.1	1603.5	0	0	0	0	0	0
9	Millar ,R (Ryan)	1	1	425	1	1	425	0	0	0	0	0	0
9	Millar ,R (Ryan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
10	Van Zyl ,E (Erasmus)	1	1	425	1	1	425	0	0	0	0	0	0
10	Van Zyl ,E (Erasmus)	1	1221.6	1646.6	1	1228.8	1646.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Rosenberg, Z (Zachary)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms