Chess South Africa Ratings Database

PLAYER PAGE

Personal

Zeng, J (Jason)

Chess SA id

1170315427

FIDE id

Date of birth

2017-02-14 (U10)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-20

Personal details last changed

1900-01-01

Junior GPX Games

14.4

Junior GPX Points

1126.3

Item	Main	Standard	Rapid	Blitz
Rating	1215.7	1231.7	1197.9	1200
Raw rating	1215.7	1231.7	1181	1200
Weighted rating	1205	1216.8	1197.9	1200
Weighted performance	0	0	0	0
Floor	715.7	731.7	699.9	700
K-factor	36	36	40	36
Min/Max rating change allowed	162.1	158.5	170.4	165.8
Highest rating	1215.7 2025-09-30	1231.7 2025-06-01	1199.9 2025-02-16	1200 2025-03-01
Highest raw rating	1215.7 2025-09-30	1231.7 2025-06-01	1199.9 2025-02-16	1200 2025-03-01
Highest weighted rating	1205 2025-09-30	1213.1 2025-08-01	1199.9 2025-02-16	1200 2025-03-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	-1.4	0
New rating	1215.7	1231.7	1196.4	1200
Analysis
Rating	1215.7	1231.7	1197.9	1200
Raw rating	1215.7	1231.7	1181	1200
Weighted rating	1205	1216.8	1197.9
Weighted performance	0	0	0
K-factor	36	36	40	36
Floor	715.7	731.7	699.9	700
Max/Min rating change allowed	162.1	158.5	170.4	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	1215.7	1231.7	1181	1200
New weighted rating	1206	1218.5	1196.4	1200
New weighted performance	0	0	0	0
Temp new rating	1215.7	1231.7	1196.4	1200
Temp new rating +/-	0	0	-1.4	0
Final new rating +/-	0	0	-1.4	0
New rating	1215.7	1231.7	1196.4	1200
New K-factor	36	36	40	36
New floor	715.7	731.7	699.9	700

Item	Main	Standard	Rapid
	0	0	0
	21	10	11
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	21	10	11

Games since
	Main 21	Standard 10		Rapid 11		Blitz 0
Gender	Male
Age group	U10
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 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	21	8	38.1	-101.2	1294.4	1193.2
Standard	10	5	50	0	1292.1	1292.1
Rapid	11	3	27.27	-193.2	1296.5	1103.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	21	8	38.1	-101.2	1294.4	1193.2
Standard	10	5	50	0	1292.1	1292.1
Rapid	11	3	27.27	-193.2	1296.5	1103.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1215.7	1231.7	1181	1200
2025-09-01	1211.9	1231.7	1199.4	1200
2025-08-01	1211.9	1231.7	1199.4	1200
2025-07-01	1211.9	1231.7	1199.4	1200
2025-06-01	1211.9	1231.7	1199.4	1200
2025-05-01	1201.8	1228.9	1199.4	1200
2025-04-01	1201.8	1228.9	1199	1200
2025-03-01	1201.8	1228.9	1193.8	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	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 Spring Flower Birthday Rapid 2025 (U10)	2025-09-20	2025-09-20	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
2	Mzansi Africa Classic 2025 (Rising Stars)	2025-05-17	2025-05-17	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	JMC Rapid The Bridge School 2025 (U10)	2025-02-23	2025-02-23	Rapid	Johannesburg Metro (GJM)	7	6	1	Yes	Analysis
4	MCA Welcome 2025 (Newcomers)	2025-02-15	2025-02-15	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	MCA Spring Flower Birthday Rapid 2025 (U10)	2025-09-20	2025-09-20	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
2	Mzansi Africa Classic 2025 (Rising Stars)	2025-05-17	2025-05-17	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	JMC Rapid The Bridge School 2025 (U10)	2025-02-23	2025-02-23	Rapid	Johannesburg Metro (GJM)	7	6	1	Yes	Analysis
4	MCA Welcome 2025 (Newcomers)	2025-02-15	2025-02-15	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis

#	Games	Start				End
1	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 5	type Rapid	result 1	date 2025-09-20	rnd 5	type Rapid	result 1
		Opponent Du Plessis, H (Henning)				Opponent Du Plessis, H (Henning)
2	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 1	type Rapid	result 1	date 2025-09-20	rnd 1	type Rapid	result 1
		Opponent Venter, A (Ashton)				Opponent Venter, A (Ashton)
3	1	Tournament Mzansi Africa Classic 2025				Tournament Mzansi Africa Classic 2025
		date 2025-05-17	rnd 4	type Standard	result 1	date 2025-05-17	rnd 4	type Standard	result 1
		Opponent Mfazwe, P (Phumla)				Opponent Mfazwe, P (Phumla)

#	Games	Start				End
1	1	Tournament Mzansi Africa Classic 2025				Tournament Mzansi Africa Classic 2025
		date 2025-05-17	rnd 4	type Standard	result 1	date 2025-05-17	rnd 4	type Standard	result 1
		Opponent Mfazwe, P (Phumla)				Opponent Mfazwe, P (Phumla)
2	1	Tournament Mzansi Africa Classic 2025				Tournament Mzansi Africa Classic 2025
		date 2025-05-17	rnd 2	type Standard	result 1	date 2025-05-17	rnd 2	type Standard	result 1
		Opponent Du Pisani, G (Grayson)				Opponent Du Pisani, G (Grayson)
3	1	Tournament MCA Welcome 2025				Tournament MCA Welcome 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-02-15	rnd 5	type Standard	result 1
		Opponent Oliver, H (Henry)				Opponent Oliver, H (Henry)

#	Games	Start				End
1	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 5	type Rapid	result 1	date 2025-09-20	rnd 5	type Rapid	result 1
		Opponent Du Plessis, H (Henning)				Opponent Du Plessis, H (Henning)
2	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 1	type Rapid	result 1	date 2025-09-20	rnd 1	type Rapid	result 1
		Opponent Venter, A (Ashton)				Opponent Venter, A (Ashton)
3	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 du Preez, A (Anastasia)				Opponent du Preez, A (Anastasia)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 5	type Rapid	result 1	date 2025-09-20	rnd 5	type Rapid	result 1
		Opponent Du Plessis, H (Henning)				Opponent Du Plessis, H (Henning)
2	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 1	type Rapid	result 1	date 2025-09-20	rnd 1	type Rapid	result 1
		Opponent Venter, A (Ashton)				Opponent Venter, A (Ashton)
3	1	Tournament Mzansi Africa Classic 2025				Tournament Mzansi Africa Classic 2025
		date 2025-05-17	rnd 4	type Standard	result 1	date 2025-05-17	rnd 4	type Standard	result 1
		Opponent Mfazwe, P (Phumla)				Opponent Mfazwe, P (Phumla)

#	Games	Start				End
1	1	Tournament Mzansi Africa Classic 2025				Tournament Mzansi Africa Classic 2025
		date 2025-05-17	rnd 4	type Standard	result 1	date 2025-05-17	rnd 4	type Standard	result 1
		Opponent Mfazwe, P (Phumla)				Opponent Mfazwe, P (Phumla)
2	1	Tournament Mzansi Africa Classic 2025				Tournament Mzansi Africa Classic 2025
		date 2025-05-17	rnd 2	type Standard	result 1	date 2025-05-17	rnd 2	type Standard	result 1
		Opponent Du Pisani, G (Grayson)				Opponent Du Pisani, G (Grayson)
3	1	Tournament MCA Welcome 2025				Tournament MCA Welcome 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-02-15	rnd 5	type Standard	result 1
		Opponent Oliver, H (Henry)				Opponent Oliver, H (Henry)

#	Games	Start				End
1	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 5	type Rapid	result 1	date 2025-09-20	rnd 5	type Rapid	result 1
		Opponent Du Plessis, H (Henning)				Opponent Du Plessis, H (Henning)
2	1	Tournament MCA Spring Flower Birthday Rapid 2025				Tournament MCA Spring Flower Birthday Rapid 2025
		date 2025-09-20	rnd 1	type Rapid	result 1	date 2025-09-20	rnd 1	type Rapid	result 1
		Opponent Venter, A (Ashton)				Opponent Venter, A (Ashton)
3	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 du Preez, A (Anastasia)				Opponent du Preez, A (Anastasia)

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	Mathi ,D (Daniel)	2	0	-425	1	0	-425	1	0	-425	0	0	0
1	Mathi ,D (Daniel)	2	1361.6	936.6	1	1200	936.6	1	1200	936.6	0	0	0
2	Mfazwe ,P (Phumla)	1	1	425	1	1	425	0	0	0	0	0	0
2	Mfazwe ,P (Phumla)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Venter ,J (Jaco)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Venter ,J (Jaco)	1	1414.1	989.1	1	1401.9	989.1	0	0	0	0	0	0
4	Van Zijl ,A (Adolf)	1	1	425	1	1	425	0	0	0	0	0	0
4	Van Zijl ,A (Adolf)	1	1158.1	1583.1	1	1152.6	1583.1	0	0	0	0	0	0
5	Tierney ,C (Cameron)	1	1	425	1	1	425	0	0	0	0	0	0
5	Tierney ,C (Cameron)	1	1191.4	1616.4	1	1200	1616.4	0	0	0	0	0	0
6	Du Pisani ,G (Grayson)	1	1	425	1	1	425	0	0	0	0	0	0
6	Du Pisani ,G (Grayson)	1	1186.2	1611.2	1	1183.1	1611.2	0	0	0	0	0	0
7	Tester ,L (Legan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Tester ,L (Legan)	1	1200	775	1	1200	775	0	0	0	0	0	0
8	Oliver ,H (Henry)	1	1	425	1	1	425	0	0	0	0	0	0
8	Oliver ,H (Henry)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Frishter ,S (Sofia)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Frishter ,S (Sofia)	1	1654.6	1229.6	1	1660.2	1229.6	0	0	0	0	0	0
10	Newman ,A (Ayen)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Newman ,A (Ayen)	1	1516.3	1091.3	1	1403.7	1091.3	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

Zeng, J (Jason)

Ratings

Game statistics

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms