Chess South Africa Ratings Database

PLAYER PAGE

Personal

Chen, Z (Zoey)

Chess SA id

2130192097

FIDE id

Date of birth

2013-09-04 (U14)

Gender

Female

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-07-19

Personal details last changed

1900-01-01

Junior GPX Games

21.8

Junior GPX Points

1093

Item	Main	Standard	Rapid	Blitz
Rating	1212.5	1219.4	1186.3	1200
Raw rating	1211.5	1217.9	1186.3	1200
Weighted rating	1212.5	1219.4	1185.4	1200
Weighted performance	1068.3	1081.3	0	0
Floor	725.4	733.7	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	163.1	161.6	169.1	165.8
Highest rating	1239.3 2024-06-01	1324.1 2024-06-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1225.4 2024-10-01	1233.7 2024-10-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1225.4 2025-02-01	1233.7 2025-05-05	1200 2024-02-01	1200 2024-02-01
Highest weighted performance	1239.3 2024-06-01	1324.1 2024-06-01	1200 2024-12-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.2	0.2	0	0
New rating	1212.7	1219.6	1186.3	1200
Analysis
Rating	1212.5	1219.4	1186.3	1200
Raw rating	1211.5	1217.9	1186.3	1200
Weighted rating	1212.5	1219.4	1185.4
Weighted performance	1068.3	1081.3	0
K-factor	36	36	36	36
Floor	725.4	733.7	700	700
Max/Min rating change allowed	163.1	161.6	169.1	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	1211.5	1217.9	1186.3	1200
New weighted rating	1212.7	1219.6	1185.3	1200
New weighted performance	1067.9	1080.9	0	0
Temp new rating	1212.7	1219.6	1186.3	1200
Temp new rating +/-	0.2	0.2	0	0
Final new rating +/-	0.2	0.2	0	0
New rating	1212.7	1219.6	1186.3	1200
New K-factor	36	36	36	36
New floor	725.4	733.7	700	700

Item	Main	Standard	Rapid
	0	0	0
	27	20	7
	20	15	5
	0	0	0
	0	0	0
	0	0	0
History	47	35	12

Games since
	Main 47	Standard 35		Rapid 12		Blitz 0
Gender	Female
Age group	U14
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	3949		1274		347
Female	938		287		70
U14	752		243		54
U14 Female	213		67		16
Standard
	RSA		Province		Region
Overall	3775		1334		342
Female	894		300		68
U14	735		253		56
U14 Female	209		69		16
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-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	27	9	33.33	-141.7	1264.4	1122.7
Standard	20	7.5	37.5	-106.2	1245.9	1139.7
Rapid	7	1.5	21.43	-242.9	1317.3	1074.4
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	47	19.5	41.49	-72.3	1245.7	1173.3
Standard	35	16	45.71	-36.4	1230.8	1194.4
Rapid	12	3.5	29.17	-177.1	1288.9	1111.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1211.5	1217.9	1186.3	1200
2025-09-01	1211.5	1217.9	1186.3	1200
2025-08-01	1211.5	1217.9	1186.3	1200
2025-07-01	1211.6	1218.2	1186.3	1200
2025-06-01	1209.6	1215.1	1186.3	1200
2025-05-01	1211.2	1217.6	1186.3	1200
2025-04-01	1210.5	1216.8	1186.3	1200
2025-03-01	1209.1	1216.2	1183.2	1200
2025-02-01	1225.4	1233.7	1187.3	1200
2025-01-01	1225.4	1233.7	1182.8	1200
2024-12-01	1225.4	1233.7	1182.8	1200
2024-11-01	1225.4	1233.7	1182.8	1200
2024-10-01	1225.4	1233.7	1182.8	1200
2024-09-01	1197.6	1202.4	1182.8	1200
2024-08-01	1220.6	1230.8	1182.8	1200
2024-07-01	1220.6	1230.8	1182.8	1200
2024-06-01	1193.4	1200	1182.8	1200
2024-08-01	1193.4	1200	1182.8	1200
2024-04-01	1193.4	1200	1182.8	1200
2024-03-01	1193.4	1200	1182.8	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200
2023-11-01	1200	1200	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	MCA Winter Chill Classic 2025 (Junior)	2025-07-19	2025-07-19	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
2	JMC Crawford Sandton 2025 (D)	2025-05-10	2025-05-10	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	MCA Summer March 2025 (Intermediate)	2025-03-08	2025-03-08	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis
4	JMC Rapid The Bridge School 2025 (Open)	2025-02-23	2025-02-23	Rapid	Johannesburg Metro (GJM)	7	7	1.5	Yes	Analysis
5	MCA Welcome 2025 (Junior)	2025-02-15	2025-02-15	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	MCA Winter Chill Classic 2025 (Junior)	2025-07-19	2025-07-19	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
2	JMC Crawford Sandton 2025 (D)	2025-05-10	2025-05-10	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	MCA Summer March 2025 (Intermediate)	2025-03-08	2025-03-08	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis
4	JMC Rapid The Bridge School 2025 (Open)	2025-02-23	2025-02-23	Rapid	Johannesburg Metro (GJM)	7	7	1.5	Yes	Analysis
5	MCA Welcome 2025 (Junior)	2025-02-15	2025-02-15	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
6	Gauteng Schools Individuals Finals 2024 (U11 Girls)	2024-08-16	2024-08-16	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
7	JMC Closed 2024 (D)	2024-08-09	2024-08-11	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
8	JMC Trinityhouse Little Falls 2024 (D)	2024-06-02	2024-06-02	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
9	Gear Up Mzansi Rapid 2024 (Junior)	2024-02-17	2024-02-17	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis

#	Games	Start				End
1	3	Tournament MCA Welcome 2025				Tournament JMC Rapid The Bridge School 2025
		date 2025-02-15	rnd 4	type Standard	result 1	date 2025-02-23	rnd 1	type Rapid	result 0.5
		Opponent Moyo, M (Musawenkosi)				Opponent Pienaar, LA (Amadeus Leonard)
2	3	Tournament JMC Closed 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-08-10	rnd 4	type Standard	result 1	date 2024-08-16	rnd 1	type Standard	result 1
		Opponent Chikwava, R (Ronald)				Opponent Rudolph, L (Leane')
3	2	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 2	type Standard	result 1
		Opponent Nganga, A (Alfred)				Opponent Steyn, M (Mari-Louise)

#	Games	Start				End
1	4	Tournament MCA Welcome 2025				Tournament MCA Summer March 2025
		date 2025-02-15	rnd 4	type Standard	result 1	date 2025-03-08	rnd 2	type Standard	result 1
		Opponent Moyo, M (Musawenkosi)				Opponent Venter, J (Jaco)
2	3	Tournament JMC Closed 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-08-10	rnd 4	type Standard	result 1	date 2024-08-16	rnd 1	type Standard	result 1
		Opponent Chikwava, R (Ronald)				Opponent Rudolph, L (Leane')
3	2	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 2	type Standard	result 1
		Opponent Nganga, A (Alfred)				Opponent Steyn, M (Mari-Louise)

#	Games	Start				End
1	2	Tournament Gear Up Mzansi Rapid 2024				Tournament JMC Rapid The Bridge School 2025
		date 2024-02-17	rnd 5	type Rapid	result 1	date 2025-02-23	rnd 1	type Rapid	result 0.5
		Opponent Molaba, O (Oagile)				Opponent Pienaar, LA (Amadeus Leonard)
2	1	Tournament JMC Rapid The Bridge School 2025				Tournament JMC Rapid The Bridge School 2025
		date 2025-02-23	rnd 4	type Rapid	result 1	date 2025-02-23	rnd 4	type Rapid	result 1
		Opponent Manganyi, X (Xitlhangu)				Opponent Manganyi, X (Xitlhangu)
3	1	Tournament Gear Up Mzansi Rapid 2024				Tournament Gear Up Mzansi Rapid 2024
		date 2024-02-17	rnd 3	type Rapid	result 1	date 2024-02-17	rnd 3	type Rapid	result 1
		Opponent Jansen Van Rensburg, W (Wicus)				Opponent Jansen Van Rensburg, W (Wicus)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 2	type Standard	result 1
		Opponent Nganga, A (Alfred)				Opponent Steyn, M (Mari-Louise)
2	2	Tournament MCA Welcome 2025				Tournament MCA Welcome 2025
		date 2025-02-15	rnd 4	type Standard	result 1	date 2025-02-15	rnd 5	type Standard	result 1
		Opponent Moyo, M (Musawenkosi)				Opponent Naidoo, T (Talin)
3	2	Tournament Gauteng Schools Individuals Finals 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-08-16	rnd 3	type Standard	result 1	date 2024-08-16	rnd 4	type Standard	result 1
		Opponent Rahube, R (Remolebogile)				Opponent Keyter, A (Alissa)

#	Games	Start				End
1	2	Tournament MCA Winter Chill Classic 2025				Tournament MCA Winter Chill Classic 2025
		date 2025-07-19	rnd 1	type Standard	result 1	date 2025-07-19	rnd 2	type Standard	result 1
		Opponent Nganga, A (Alfred)				Opponent Steyn, M (Mari-Louise)
2	2	Tournament MCA Welcome 2025				Tournament MCA Welcome 2025
		date 2025-02-15	rnd 4	type Standard	result 1	date 2025-02-15	rnd 5	type Standard	result 1
		Opponent Moyo, M (Musawenkosi)				Opponent Naidoo, T (Talin)
3	2	Tournament Gauteng Schools Individuals Finals 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-08-16	rnd 3	type Standard	result 1	date 2024-08-16	rnd 4	type Standard	result 1
		Opponent Rahube, R (Remolebogile)				Opponent Keyter, A (Alissa)

#	Games	Start				End
1	1	Tournament JMC Rapid The Bridge School 2025				Tournament JMC Rapid The Bridge School 2025
		date 2025-02-23	rnd 4	type Rapid	result 1	date 2025-02-23	rnd 4	type Rapid	result 1
		Opponent Manganyi, X (Xitlhangu)				Opponent Manganyi, X (Xitlhangu)
2	1	Tournament Gear Up Mzansi Rapid 2024				Tournament Gear Up Mzansi Rapid 2024
		date 2024-02-17	rnd 5	type Rapid	result 1	date 2024-02-17	rnd 5	type Rapid	result 1
		Opponent Molaba, O (Oagile)				Opponent Molaba, O (Oagile)
3	1	Tournament Gear Up Mzansi Rapid 2024				Tournament Gear Up Mzansi Rapid 2024
		date 2024-02-17	rnd 3	type Rapid	result 1	date 2024-02-17	rnd 3	type Rapid	result 1
		Opponent Jansen Van Rensburg, W (Wicus)				Opponent Jansen Van Rensburg, W (Wicus)

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	Gokool ,N (Nishka)	2	0	-425	0	0	0	2	0	-425	0	0	0
1	Gokool ,N (Nishka)	2	1327.6	902.6	0	0	0	2	1255.2	902.6	0	0	0
2	Kaldine ,T (Taye)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Kaldine ,T (Taye)	1	1200	775	1	1200	775	0	0	0	0	0	0
3	Steyn ,M (Mari-Louise)	1	1	425	1	1	425	0	0	0	0	0	0
3	Steyn ,M (Mari-Louise)	1	1292	1717	1	1284.4	1717	0	0	0	0	0	0
4	Mohonwe ,LK (Lebone Kgosi)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Mohonwe ,LK (Lebone Kgosi)	1	1333.2	908.2	1	1359.3	908.2	0	0	0	0	0	0
5	Ngubane ,L (Lesedi)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Ngubane ,L (Lesedi)	1	1094.3	669.3	1	1090.6	669.3	0	0	0	0	0	0
6	Westoby ,A (Adam)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Westoby ,A (Adam)	1	1387.1	962.1	1	1395.4	962.1	0	0	0	0	0	0
7	Maslekar ,S (Siddhant)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
7	Maslekar ,S (Siddhant)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
8	Prakash ,M (Maisha)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Prakash ,M (Maisha)	1	1250.6	825.6	1	1246.4	825.6	0	0	0	0	0	0
9	Van Der Westhuizen ,J (Jack)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Van Der Westhuizen ,J (Jack)	1	1301.3	876.3	1	1303.9	876.3	0	0	0	0	0	0
10	Tshabalala ,H (Happy)	1	1	425	1	1	425	0	0	0	0	0	0
10	Tshabalala ,H (Happy)	1	1021.6	1446.6	1	1001.6	1446.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Chen, Z (Zoey)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms