Chess South Africa Ratings Database

PLAYER PAGE

Personal

Johnston, Z (Zach)

Chess SA id

1100137580

FIDE id

Date of birth

2010-11-10 (U16)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-08-19

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1204.7	1195.2	1180.4	1200
Raw rating	1204.7	1195.2	1180.4	1200
Weighted rating	1204.7	1195.2	1180.4	1200
Weighted performance	0	0	0	0
Floor	704.7	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	164.7	167	170.5	165.8
Highest rating	1222.8 2022-02-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1204.7 2024-02-01	1200 2020-01-01	1200 2020-01-01	1200 2024-02-01
Highest weighted rating	1204.7 2025-07-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1222.8 2022-02-01	1200 2020-01-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1204.7	1195.2	1180.4	1200
Analysis
Rating	1204.7	1195.2	1180.4	1200
Raw rating	1204.7	1195.2	1180.4	1200
Weighted rating	1204.7	1195.2	1180.4
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	704.7	700	700	700
Max/Min rating change allowed	164.7	167	170.5	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	1204.7	1195.2	1180.4	1200
New weighted rating	1204.7	1195.2	1180.4	1200
New weighted performance	0	0	0	0
Temp new rating	1204.7	1195.2	1180.4	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1204.7	1195.2	1180.4	1200
New K-factor	36	36	36	36
New floor	704.7	700	700	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	11	0	11
	11	6	5
	0	0	0
History	22	6	16

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
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	22	11.5	52.27	19.3	1177.6	1196.9
Standard	6	3	50	0	1217.8	1217.8
Rapid	16	8.5	53.12	26.6	1162.5	1189
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1204.7	1195.2	1180.4	1200
2025-09-30	1204.7	1195.2	1180.4	1200
2025-09-01	1204.7	1195.2	1180.4	1200
2025-08-01	1204.7	1195.2	1180.4	1200
2025-07-01	1204.7	1195.2	1180.4	1200
2025-06-01	1204.7	1195.2	1180.4	1200
2025-05-01	1204.7	1195.2	1180.4	1200
2025-04-01	1204.7	1195.2	1180.4	1200
2025-03-01	1204.7	1195.2	1180.4	1200
2025-02-01	1204.7	1195.2	1180.4	1200
2025-01-01	1204.7	1195.2	1180.4	1200
2024-12-01	1204.7	1195.2	1180.4	1200
2024-11-01	1204.7	1195.2	1180.4	1200
2024-10-01	1204.7	1195.2	1180.4	1200
2024-09-01	1204.7	1195.2	1180.4	1200
2024-08-01	1204.7	1195.2	1180.4	1200
2024-07-01	1204.7	1195.2	1180.4	1200
2024-09-01	1204.7	1195.2	1180.4	1200
2024-05-01	1204.7	1195.2	1180.4	1200
2024-04-01	1204.7	1195.2	1180.4	1200
2024-03-01	1204.7	1195.2	1180.4	1200
2024-02-01	1204.7	1195.2	1180.4	1200
2024-01-01	1204.7	1195.2	1180.4	1200
2023-12-01	1204.7	1195.2	1180.4	1200

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	Stellenbosch Primary Chess Tournament 2023 (U14)	2023-08-19	2023-08-19	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
2	Rhenish Primary Tournament 2023 (U14)	2023-05-13	2023-05-13	Rapid	Cape Winelands (WCW)	6	5	3	Yes	Analysis
3	Rhenish Primary Tournament 2022 (U14)	2022-05-14	2022-05-14	Rapid	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
4	Cape Winelands Open 2022 (U14)	2022-02-12	2022-02-13	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis

#	Games	Start				End
1	2	Tournament Rhenish Primary Tournament 2023				Tournament Stellenbosch Primary Chess Tournament 2023
		date 2023-05-13	rnd 5	type Rapid	result 1	date 2023-08-19	rnd 1	type Rapid	result 1
		Opponent Van Wyk, H (Harry)				Opponent Luiters, E (Eva)
2	2	Tournament Rhenish Primary Tournament 2022				Tournament Rhenish Primary Tournament 2023
		date 2022-05-14	rnd 5	type Rapid	result 1	date 2023-05-13	rnd 1	type Rapid	result 1
		Opponent Solomon, B (Brooklyn)				Opponent Nherera, E (Eli)
3	2	Tournament Rhenish Primary Tournament 2022				Tournament Rhenish Primary Tournament 2022
		date 2022-05-14	rnd 2	type Rapid	result 1	date 2022-05-14	rnd 3	type Rapid	result 0.5
		Opponent Schreve, E (Eduard)				Opponent Dangazele, S (Sibabalwe)

#	Games	Start				End
1	2	Tournament Cape Winelands Open 2022				Tournament Cape Winelands Open 2022
		date 2022-02-13	rnd 5	type Standard	result 1	date 2022-02-13	rnd 6	type Standard	result 1
		Opponent Musi, S (Seco)				Opponent Bakkes, F (Finn)
2	1	Tournament Cape Winelands Open 2022				Tournament Cape Winelands Open 2022
		date 2022-02-12	rnd 2	type Standard	result 1	date 2022-02-12	rnd 2	type Standard	result 1
		Opponent Walters, M (Mia)				Opponent Walters, M (Mia)

#	Games	Start				End
1	2	Tournament Rhenish Primary Tournament 2023				Tournament Stellenbosch Primary Chess Tournament 2023
		date 2023-05-13	rnd 5	type Rapid	result 1	date 2023-08-19	rnd 1	type Rapid	result 1
		Opponent Van Wyk, H (Harry)				Opponent Luiters, E (Eva)
2	2	Tournament Rhenish Primary Tournament 2022				Tournament Rhenish Primary Tournament 2023
		date 2022-05-14	rnd 5	type Rapid	result 1	date 2023-05-13	rnd 1	type Rapid	result 1
		Opponent Solomon, B (Brooklyn)				Opponent Nherera, E (Eli)
3	2	Tournament Rhenish Primary Tournament 2022				Tournament Rhenish Primary Tournament 2022
		date 2022-05-14	rnd 2	type Rapid	result 1	date 2022-05-14	rnd 3	type Rapid	result 0.5
		Opponent Schreve, E (Eduard)				Opponent Dangazele, S (Sibabalwe)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Rhenish Primary Tournament 2023				Tournament Stellenbosch Primary Chess Tournament 2023
		date 2023-05-13	rnd 5	type Rapid	result 1	date 2023-08-19	rnd 1	type Rapid	result 1
		Opponent Van Wyk, H (Harry)				Opponent Luiters, E (Eva)
2	2	Tournament Rhenish Primary Tournament 2022				Tournament Rhenish Primary Tournament 2023
		date 2022-05-14	rnd 5	type Rapid	result 1	date 2023-05-13	rnd 1	type Rapid	result 1
		Opponent Solomon, B (Brooklyn)				Opponent Nherera, E (Eli)
3	2	Tournament Cape Winelands Open 2022				Tournament Cape Winelands Open 2022
		date 2022-02-13	rnd 5	type Standard	result 1	date 2022-02-13	rnd 6	type Standard	result 1
		Opponent Musi, S (Seco)				Opponent Bakkes, F (Finn)

#	Games	Start				End
1	2	Tournament Cape Winelands Open 2022				Tournament Cape Winelands Open 2022
		date 2022-02-13	rnd 5	type Standard	result 1	date 2022-02-13	rnd 6	type Standard	result 1
		Opponent Musi, S (Seco)				Opponent Bakkes, F (Finn)
2	1	Tournament Cape Winelands Open 2022				Tournament Cape Winelands Open 2022
		date 2022-02-12	rnd 2	type Standard	result 1	date 2022-02-12	rnd 2	type Standard	result 1
		Opponent Walters, M (Mia)				Opponent Walters, M (Mia)

#	Games	Start				End
1	2	Tournament Rhenish Primary Tournament 2023				Tournament Stellenbosch Primary Chess Tournament 2023
		date 2023-05-13	rnd 5	type Rapid	result 1	date 2023-08-19	rnd 1	type Rapid	result 1
		Opponent Van Wyk, H (Harry)				Opponent Luiters, E (Eva)
2	2	Tournament Rhenish Primary Tournament 2022				Tournament Rhenish Primary Tournament 2023
		date 2022-05-14	rnd 5	type Rapid	result 1	date 2023-05-13	rnd 1	type Rapid	result 1
		Opponent Solomon, B (Brooklyn)				Opponent Nherera, E (Eli)
3	1	Tournament Stellenbosch Primary Chess Tournament 2023				Tournament Stellenbosch Primary Chess Tournament 2023
		date 2023-08-19	rnd 6	type Rapid	result 1	date 2023-08-19	rnd 6	type Rapid	result 1
		Opponent Lourens, J (Janco)				Opponent Lourens, J (Janco)

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	Goosen ,R (Ruan)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Goosen ,R (Ruan)	1	1306.8	881.8	1	1169.2	881.8	0	0	0	0	0	0
2	Bakkes ,F (Finn)	1	1	425	1	1	425	0	0	0	0	0	0
2	Bakkes ,F (Finn)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Musi ,S (Seco)	1	1	425	1	1	425	0	0	0	0	0	0
3	Musi ,S (Seco)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Williams ,S (Samuel)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Williams ,S (Samuel)	1	1200	775	1	1200	775	0	0	0	0	0	0
5	Walters ,M (Mia)	1	1	425	1	1	425	0	0	0	0	0	0
5	Walters ,M (Mia)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Van Zyl ,C (Cornelia Aletta)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Van Zyl ,C (Cornelia Aletta)	1	1200	775	1	1200	775	0	0	0	0	0	0
7	Wiehahn ,S (Simon Kasper)	1	0	-425	0	0	0	1	0	-425	0	0	0
7	Wiehahn ,S (Simon Kasper)	1	1194.1	769.1	0	0	0	1	1180.2	769.1	0	0	0
8	Yoon ,YJ (Yea Jun)	1	0	-425	0	0	0	1	0	-425	0	0	0
8	Yoon ,YJ (Yea Jun)	1	1319.4	894.4	0	0	0	1	1292.2	894.4	0	0	0
9	Knoesen ,J (James)	1	1	425	0	0	0	1	1	425	0	0	0
9	Knoesen ,J (James)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
10	Prins ,S (Stefan)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Prins ,S (Stefan)	1	1311.3	886.3	0	0	0	1	1147.2	886.3	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Johnston, Z (Zach)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms