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

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1215.7	1231.7	1193.8	1200
Raw rating	1215.7	1231.7	1181	1200
Weighted rating	1207.9	1221.7	1193.8	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	-1.2	0
New rating	1215.7	1231.7	1192.6	1200
Analysis
Rating	1215.7	1231.7	1193.8	1200
Raw rating	1215.7	1231.7	1181	1200
Weighted rating	1207.9	1221.7	1193.8
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	1208.8	1223.1	1192.6	1200
New weighted performance	0	0	0	0
Temp new rating	1215.7	1231.7	1192.6	1200
Temp new rating +/-	0	0	-1.2	0
Final new rating +/-	0	0	-1.2	0
New rating	1215.7	1231.7	1192.6	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
2026-01-01	1215.7	1231.7	1181	1200
2025-11-30	1215.7	1231.7	1181	1200
2025-11-01	1215.7	1231.7	1181	1200
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
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-05-01	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

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	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

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Zeng, J (Jason)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms