Chess South Africa Ratings Database

PLAYER PAGE

Personal

Choonoo Johnson, Z (Zachary)

Chess SA id

1130137320

FIDE id

Date of birth

2013-02-09 (U14)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-02-01

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1296.8	1300.2	1228.8	1200
Raw rating	1296.8	1300.2	1228.8	1200
Weighted rating	1285.5	1288.7	1226.7	1200
Weighted performance	1104	0	0	0
Floor	796.8	800.2	734.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	144.5	143.8	159.1	165.8
Highest rating	1296.8 2025-03-01	1396.5 2024-03-01	1292.9 2022-02-01	1200 2018-10-01
Highest raw rating	1296.8 2025-03-01	1300.2 2025-03-01	1234.2 2023-01-01	1200 2024-02-01
Highest weighted rating	1277.8 2025-08-01	1280.4 2025-08-01	1224.9 2025-08-01	1200 2018-10-01
Highest weighted performance	1246.7 2022-02-01	1396.5 2024-03-01	1292.9 2022-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1296.8	1300.2	1228.8	1200
Analysis
Rating	1296.8	1300.2	1228.8	1200
Raw rating	1296.8	1300.2	1228.8	1200
Weighted rating	1285.5	1288.7	1226.7
Weighted performance	1104	0	0
K-factor	36	36	36	36
Floor	796.8	800.2	734.2	700
Max/Min rating change allowed	144.5	143.8	159.1	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	1296.8	1300.2	1228.8	1200
New weighted rating	1287.5	1290.8	1227.2	1200
New weighted performance	1096.3	0	0	0
Temp new rating	1296.8	1300.2	1228.8	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1296.8	1300.2	1228.8	1200
New K-factor	36	36	36	36
New floor	796.8	800.2	734.2	700

Item	Main	Standard	Rapid
	0	0	0
	6	6	0
	16	11	5
	6	0	6
	11	0	11
	0	0	0
History	39	17	22

Games since
	Main 22	Standard 17		Rapid 5		Blitz 0
Gender	Male
Age group	U14
Region	Cape Town (WCT)
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	6	4	66.67	141.7	1237.7	1379.4
Standard	6	4	66.67	141.7	1237.7	1379.4
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	39	22.5	57.69	65.4	1236	1301.4
Standard	17	11	64.71	125	1252.8	1377.8
Rapid	22	11.5	52.27	19.3	1223.1	1242.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1296.8	1300.2	1228.8	1200
2025-09-30	1296.8	1300.2	1228.8	1200
2025-09-01	1296.8	1300.2	1228.8	1200
2025-08-01	1296.8	1300.2	1228.8	1200
2025-07-01	1296.8	1300.2	1228.8	1200
2025-06-01	1296.8	1300.2	1228.8	1200
2025-05-01	1296.8	1300.2	1228.8	1200
2025-04-01	1296.8	1300.2	1228.8	1200
2025-03-01	1296.8	1300.2	1228.8	1200
2025-02-01	1274.6	1277.4	1228.8	1200
2025-01-01	1274.6	1277.4	1228.8	1200
2024-12-01	1274.6	1277.4	1228.8	1200
2024-11-01	1274.6	1277.4	1228.8	1200
2024-10-01	1274.6	1277.4	1228.8	1200
2024-09-01	1274.6	1277.4	1228.8	1200
2024-08-01	1274.6	1277.4	1228.8	1200
2024-07-01	1270.3	1277.4	1211.2	1200
2024-09-01	1270.3	1277.4	1211.2	1200
2024-05-01	1270.3	1277.4	1211.2	1200
2024-04-01	1270.3	1277.4	1211.2	1200
2024-03-01	1220.1	1216.2	1211.2	1200
2024-02-01	1209.3	1200	1211.2	1200
2024-01-01	1209.3	1200	1211.2	1200
2023-12-01	1209.3	1200	1211.2	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	2025 District Central Schools Chess Individual Trials (U13 Open)	2025-01-31	2025-02-01	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 District Central Schools Chess Individual Trials (U13 Open)	2025-01-31	2025-02-01	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
2	CT Metro Central District Top Schools 2024 (U13 Mixed)	2024-07-26	2024-07-26	Rapid	Cape Town (WCT)	5	5	3	Yes	Analysis
3	Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Boys)	2024-03-02	2024-03-03	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
4	CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Boys)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
5	Cape of Good Hope Open 2023 (U12)	2023-01-28	2023-01-28	Rapid	Cape Town (WCT)	6	6	2	Yes	Analysis
6	Summer Slam 2022 (C)	2022-12-13	2022-12-13	Rapid	Cape Town (WCT)	6	6	3.5	Yes	Analysis
7	Laerskool Welgemoed 12th Annual Chess Challenge 2022 (U8+U10)	2022-02-19	2022-02-19	Rapid	Cape Town (WCT)	5	5	3	Yes	Analysis

#	Games	Start				End
1	3	Tournament CT Metro Central District Top Schools 2024				Tournament 2025 District Central Schools Chess Individual Trials
		date 2024-07-26	rnd 5	type Rapid	result 1	date 2025-01-31	rnd 2	type Standard	result 1
		Opponent Jeram, V (Vira)				Opponent Mankune, L (Libone)
2	3	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament CT Metro Central District Top Schools 2024
		date 2024-03-03	rnd 6	type Standard	result 1	date 2024-07-26	rnd 2	type Rapid	result 1
		Opponent Smith, Z (Zachary)				Opponent Mavuso, T (Thimna)
3	2	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-03-02	rnd 1	type Standard	result 1	date 2024-03-02	rnd 2	type Standard	result 1
		Opponent Ismail, R (Razeen)				Opponent Muizenheimer, S (Sebastian)

#	Games	Start				End
1	3	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament 2025 District Central Schools Chess Individual Trials
		date 2024-03-03	rnd 6	type Standard	result 1	date 2025-01-31	rnd 2	type Standard	result 1
		Opponent Smith, Z (Zachary)				Opponent Mankune, L (Libone)
2	2	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-03-02	rnd 1	type Standard	result 1	date 2024-03-02	rnd 2	type Standard	result 1
		Opponent Ismail, R (Razeen)				Opponent Muizenheimer, S (Sebastian)
3	2	Tournament CT Metro Central District Schools Chess Individuals Trials 2024				Tournament CT Metro Central District Schools Chess Individuals Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 2	type Standard	result 1
		Opponent Jacobs, E (Emmanuel)				Opponent Smit, Z (Zander)

#	Games	Start				End
1	2	Tournament CT Metro Central District Top Schools 2024				Tournament CT Metro Central District Top Schools 2024
		date 2024-07-26	rnd 1	type Rapid	result 1	date 2024-07-26	rnd 2	type Rapid	result 1
		Opponent Opperman, L (Larah)				Opponent Mavuso, T (Thimna)
2	2	Tournament Summer Slam 2022				Tournament Summer Slam 2022
		date 2022-12-13	rnd 5	type Rapid	result 1	date 2022-12-13	rnd 6	type Rapid	result 1
		Opponent Dolman, J (Jay-Dee)				Opponent Temoore, A (Ameer)
3	2	Tournament Summer Slam 2022				Tournament Summer Slam 2022
		date 2022-12-13	rnd 2	type Rapid	result 1	date 2022-12-13	rnd 3	type Rapid	result 0.5
		Opponent Sibidla, O (Onesisa)				Opponent Small, U (Uwen)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament CT Metro Central District Top Schools 2024				Tournament 2025 District Central Schools Chess Individual Trials
		date 2024-07-26	rnd 5	type Rapid	result 1	date 2025-01-31	rnd 2	type Standard	result 1
		Opponent Jeram, V (Vira)				Opponent Mankune, L (Libone)
2	3	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament CT Metro Central District Top Schools 2024
		date 2024-03-03	rnd 6	type Standard	result 1	date 2024-07-26	rnd 2	type Rapid	result 1
		Opponent Smith, Z (Zachary)				Opponent Mavuso, T (Thimna)
3	2	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-03-02	rnd 1	type Standard	result 1	date 2024-03-02	rnd 2	type Standard	result 1
		Opponent Ismail, R (Razeen)				Opponent Muizenheimer, S (Sebastian)

#	Games	Start				End
1	3	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament 2025 District Central Schools Chess Individual Trials
		date 2024-03-03	rnd 6	type Standard	result 1	date 2025-01-31	rnd 2	type Standard	result 1
		Opponent Smith, Z (Zachary)				Opponent Mankune, L (Libone)
2	2	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-03-02	rnd 1	type Standard	result 1	date 2024-03-02	rnd 2	type Standard	result 1
		Opponent Ismail, R (Razeen)				Opponent Muizenheimer, S (Sebastian)
3	2	Tournament CT Metro Central District Schools Chess Individuals Trials 2024				Tournament CT Metro Central District Schools Chess Individuals Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 2	type Standard	result 1
		Opponent Jacobs, E (Emmanuel)				Opponent Smit, Z (Zander)

#	Games	Start				End
1	2	Tournament CT Metro Central District Top Schools 2024				Tournament CT Metro Central District Top Schools 2024
		date 2024-07-26	rnd 1	type Rapid	result 1	date 2024-07-26	rnd 2	type Rapid	result 1
		Opponent Opperman, L (Larah)				Opponent Mavuso, T (Thimna)
2	2	Tournament Summer Slam 2022				Tournament Summer Slam 2022
		date 2022-12-13	rnd 5	type Rapid	result 1	date 2022-12-13	rnd 6	type Rapid	result 1
		Opponent Dolman, J (Jay-Dee)				Opponent Temoore, A (Ameer)
3	2	Tournament Laerskool Welgemoed 12th Annual Chess Challenge 2022				Tournament Laerskool Welgemoed 12th Annual Chess Challenge 2022
		date 2022-02-19	rnd 2	type Rapid	result 1	date 2022-02-19	rnd 3	type Rapid	result 1
		Opponent Nel, C (Charles Paul)				Opponent Polk, W (Windsor)

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	Nel ,C (Charles Paul)	3	1	-141.7	1	0	-425	2	1	0	0	0	0
1	Nel ,C (Charles Paul)	3	1339.4	1197.7	1	1508.4	914.4	2	1252.9	1339.4	0	0	0
2	Mngqibisa ,P (Phila)	2	2	425	2	2	425	0	0	0	0	0	0
2	Mngqibisa ,P (Phila)	2	1174.4	1599.4	2	1148.6	1599.4	0	0	0	0	0	0
3	Smith ,Z (Zachary)	1	1	425	1	1	425	0	0	0	0	0	0
3	Smith ,Z (Zachary)	1	1273	1698	1	1289.6	1698	0	0	0	0	0	0
4	Jacobs ,E (Emmanuel)	1	1	425	1	1	425	0	0	0	0	0	0
4	Jacobs ,E (Emmanuel)	1	1084.8	1509.8	1	1142.4	1509.8	0	0	0	0	0	0
5	Enus Murmdker ,M (Mughamnad Iskander)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Enus Murmdker ,M (Mughamnad Iskander)	1	1294	869	1	1271.5	869	0	0	0	0	0	0
6	Pearson ,R (Rylee)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Pearson ,R (Rylee)	1	1230.6	805.6	1	1232.8	805.6	0	0	0	0	0	0
7	Barron ,D (Dorian)	1	1	425	1	1	425	0	0	0	0	0	0
7	Barron ,D (Dorian)	1	1155.5	1580.5	1	1189.9	1580.5	0	0	0	0	0	0
8	Mankune ,L (Libone)	1	1	425	1	1	425	0	0	0	0	0	0
8	Mankune ,L (Libone)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Mu�azzam ,M (Muhammad Zaid Ghafi)	1	1	425	1	1	425	0	0	0	0	0	0
9	Mu�azzam ,M (Muhammad Zaid Ghafi)	1	1200.5	1625.5	1	1200	1625.5	0	0	0	0	0	0
10	Muafa ,M (Muhammad Salman)	1	1	425	1	1	425	0	0	0	0	0	0
10	Muafa ,M (Muhammad Salman)	1	1187.5	1612.5	1	1181.1	1612.5	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Choonoo Johnson, 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