Chess South Africa Ratings Database

PLAYER PAGE

Personal

Weng, J (Jiajia)

Chess SA id

2140315707

FIDE id

Date of birth

2014-05-08 (U12)

Gender

Female

Region

Buffalo City (EBC)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-20

Personal details last changed

2025-02-23

Junior GPX Games

79.3

Junior GPX Points

1268.6

Item	Main	Standard	Rapid	Blitz
Rating	1493.1	1488.7	1280.5	1200
Raw rating	1426.4	1425	1280.5	1200
Weighted rating	1300.9	1297.9	1231.9	1200
Weighted performance	1493.1	1488.7	0	0
Floor	949.6	952.8	780.5	700
K-factor	32	32	36	36
Min/Max rating change allowed	120.1	120.3	147.9	165.8
Highest rating	1493.1 2025-09-30	1488.7 2025-09-30	1280.5 2025-08-01	1200 2025-03-01
Highest raw rating	1449.6 2025-09-01	1452.8 2025-09-01	1280.5 2025-08-01	1200 2025-03-01
Highest weighted rating	1300.9 2025-09-30	1297.9 2025-09-30	1221.3 2025-08-01	1200 2025-03-01
Highest weighted performance	1493.1 2025-09-30	1488.7 2025-09-30	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.5	-0.5	0	0
New rating	1492.6	1488.2	1280.5	1200
Analysis
Rating	1493.1	1488.7	1280.5	1200
Raw rating	1426.4	1425	1280.5	1200
Weighted rating	1300.9	1297.9	1231.9
Weighted performance	1493.1	1488.7	0
K-factor	32	32	36	36
Floor	949.6	952.8	780.5	700
Max/Min rating change allowed	120.1	120.3	147.9	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	1426.4	1425	1280.5	1200
New weighted rating	1314.3	1311.3	1236.9	1200
New weighted performance	1492.6	1488.2	0	0
Temp new rating	1492.6	1488.2	1280.5	1200
Temp new rating +/-	-0.5	-0.5	0	0
Final new rating +/-	-0.5	-0.5	0	0
New rating	1492.6	1488.2	1280.5	1200
New K-factor	32	32	36	36
New floor	949.6	952.8	780.5	700

Item	Main	Standard	Rapid
	0	0	0
	94	74	20
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	94	74	20

Games since
	Main 94	Standard 74		Rapid 20		Blitz 0
Gender	Female
Age group	U12
Region	Buffalo City (EBC)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	1315		166		62
Female	177		21		11
U12	140		15		7
U12 Female	34		3		3
Standard
	RSA		Province		Region
Overall	1266		162		62
Female	181		21		12
U12	132		16		7
U12 Female	34		3		3
Rapid
	RSA		Province		Region
Overall	1151		81		23
Female	210		14		3
U12	202		10		4
U12 Female	57		4		2
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U12	-1		-1		-1
U12 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	94	57.5	61.17	94.9	1283.3	1378.2
Standard	74	45.5	61.49	97.6	1290.5	1388.1
Rapid	20	12	60	85	1256.7	1341.7
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	94	57.5	61.17	94.9	1283.3	1378.2
Standard	74	45.5	61.49	97.6	1290.5	1388.1
Rapid	20	12	60	85	1256.7	1341.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1426.4	1425	1280.5	1200
2025-09-01	1449.6	1452.8	1280.5	1200
2025-08-01	1416.7	1410.3	1280.5	1200
2025-07-01	1414.9	1410.3	1242.4	1200
2025-06-01	1431.1	1430.2	1242.4	1200
2025-05-01	1358.2	1352	1242.4	1200
2025-04-01	1270.2	1256	1242.4	1200
2025-03-01	1255.1	1235.8	1242.4	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	Buffalo City Chess Clubs League 2025 (B)	2025-09-20	2025-09-20	Standard	Buffalo City (EBC)	6	4	1	Yes	Analysis
2	EC Closed 2025 (U12 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	4.5	Yes	Analysis
3	Buffalo City Chess Junior Closed 2025 (U12 Girls)	2025-08-16	2025-08-16	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
4	3rd Chess Vikings Open Championship 2025 (C)	2025-08-02	2025-08-02	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
5	BC Schools Chess Festival 2025 (U11 Girls)	2025-07-26	2025-07-26	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
6	Beacon Bay Winter Cup 2025 (B)	2025-07-09	2025-07-09	Rapid	Buffalo City (EBC)	6	6	4	Yes	Analysis
7	2nd Vikings Classical 2025 (C)	2025-05-24	2025-05-24	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
8	2025 Buffalo City Chess Trials 3 (U12)	2025-05-10	2025-05-10	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
9	EC Open 2025 (U8-U14 Girls)	2025-05-02	2025-05-02	Standard	Buffalo City (EBC)	7	7	3.5	Yes	Analysis
10	Vikings Holiday 2025 (C)	2025-04-05	2025-04-05	Standard	Buffalo City (EBC)	5	4	3.5	Yes	Analysis
11	2025 Buffalo City Chess Trials 2 (U12)	2025-04-12	2025-04-12	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
12	2025 Buffalo City Chess Trials 1 (U12)	2025-03-22	2025-03-22	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
13	Vikings Classical March 2025 (U12)	2025-03-15	2025-03-15	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
14	Hudson League 1 2025	2025-02-10	2025-02-13	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
15	Rapid Feb 2nd Leg 2025 (U12)	2025-02-22	2025-02-22	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
16	Rapid Feb Leg 1 2025 (U12)	2025-02-15	2025-02-15	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
17	Hudson League 1 2023	2025-02-10	2025-02-13	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Buffalo City Chess Clubs League 2025 (B)	2025-09-20	2025-09-20	Standard	Buffalo City (EBC)	6	4	1	Yes	Analysis
2	EC Closed 2025 (U12 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	4.5	Yes	Analysis
3	Buffalo City Chess Junior Closed 2025 (U12 Girls)	2025-08-16	2025-08-16	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
4	3rd Chess Vikings Open Championship 2025 (C)	2025-08-02	2025-08-02	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
5	BC Schools Chess Festival 2025 (U11 Girls)	2025-07-26	2025-07-26	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
6	Beacon Bay Winter Cup 2025 (B)	2025-07-09	2025-07-09	Rapid	Buffalo City (EBC)	6	6	4	Yes	Analysis
7	2nd Vikings Classical 2025 (C)	2025-05-24	2025-05-24	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
8	2025 Buffalo City Chess Trials 3 (U12)	2025-05-10	2025-05-10	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
9	EC Open 2025 (U8-U14 Girls)	2025-05-02	2025-05-02	Standard	Buffalo City (EBC)	7	7	3.5	Yes	Analysis
10	Vikings Holiday 2025 (C)	2025-04-05	2025-04-05	Standard	Buffalo City (EBC)	5	4	3.5	Yes	Analysis
11	2025 Buffalo City Chess Trials 2 (U12)	2025-04-12	2025-04-12	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
12	2025 Buffalo City Chess Trials 1 (U12)	2025-03-22	2025-03-22	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
13	Vikings Classical March 2025 (U12)	2025-03-15	2025-03-15	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
14	Hudson League 1 2025	2025-02-10	2025-02-13	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
15	Rapid Feb 2nd Leg 2025 (U12)	2025-02-22	2025-02-22	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
16	Rapid Feb Leg 1 2025 (U12)	2025-02-15	2025-02-15	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
17	Hudson League 1 2023	2025-02-10	2025-02-13	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis

#	Games	Start				End
1	5	Tournament 2025 Buffalo City Chess Trials 1				Tournament Vikings Holiday 2025
		date 2025-03-22	rnd 5	type Standard	result 1	date 2025-04-05	rnd 4	type Standard	result 1
		Opponent Van Der Merwe, S (Sebastian)				Opponent Makeleni, L (Luyanda)
2	4	Tournament Buffalo City Chess Junior Closed 2025				Tournament EC Closed 2025
		date 2025-08-16	rnd 5	type Standard	result 1	date 2025-09-06	rnd 3	type Standard	result 0.5
		Opponent Maciki, I (Ibenathi)				Opponent Tumbare, N (Nicole)
3	4	Tournament Beacon Bay Winter Cup 2025				Tournament BC Schools Chess Festival 2025
		date 2025-07-09	rnd 6	type Rapid	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Tayi, M (Milani)				Opponent Gwana, L (Libubomi)

#	Games	Start				End
1	5	Tournament 2025 Buffalo City Chess Trials 1				Tournament Vikings Holiday 2025
		date 2025-03-22	rnd 5	type Standard	result 1	date 2025-04-05	rnd 4	type Standard	result 1
		Opponent Van Der Merwe, S (Sebastian)				Opponent Makeleni, L (Luyanda)
2	4	Tournament Buffalo City Chess Junior Closed 2025				Tournament EC Closed 2025
		date 2025-08-16	rnd 5	type Standard	result 1	date 2025-09-06	rnd 3	type Standard	result 0.5
		Opponent Maciki, I (Ibenathi)				Opponent Tumbare, N (Nicole)
3	4	Tournament 2nd Vikings Classical 2025				Tournament BC Schools Chess Festival 2025
		date 2025-05-24	rnd 5	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Bopi, H (Hlelokuhle)				Opponent Gwana, L (Libubomi)

#	Games	Start				End
1	4	Tournament Rapid Feb 2nd Leg 2025				Tournament Rapid Feb 2nd Leg 2025
		date 2025-02-22	rnd 2	type Rapid	result 1	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Matabata, O (Othawe)				Opponent Tayi, M (Milani)
2	3	Tournament Rapid Feb Leg 1 2025				Tournament Rapid Feb Leg 1 2025
		date 2025-02-15	rnd 1	type Rapid	result 0.5	date 2025-02-15	rnd 3	type Rapid	result 1
		Opponent Somdaka, O (Othalive)				Opponent Matabata, O (Othawe)
3	2	Tournament Beacon Bay Winter Cup 2025				Tournament Beacon Bay Winter Cup 2025
		date 2025-07-09	rnd 1	type Rapid	result 1	date 2025-07-09	rnd 2	type Rapid	result 1
		Opponent Lufuso, M (Milisa)				Opponent Mahlontlwana, A (Avuzwa)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Beacon Bay Winter Cup 2025				Tournament BC Schools Chess Festival 2025
		date 2025-07-09	rnd 6	type Rapid	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Tayi, M (Milani)				Opponent Gwana, L (Libubomi)
2	4	Tournament 2025 Buffalo City Chess Trials 3				Tournament 2025 Buffalo City Chess Trials 3
		date 2025-05-10	rnd 1	type Standard	result 1	date 2025-05-10	rnd 4	type Standard	result 1
		Opponent Bungane, L (Limile)				Opponent Tumbare, N (Nicole)
3	4	Tournament Rapid Feb 2nd Leg 2025				Tournament Rapid Feb 2nd Leg 2025
		date 2025-02-22	rnd 2	type Rapid	result 1	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Matabata, O (Othawe)				Opponent Tayi, M (Milani)

#	Games	Start				End
1	4	Tournament 2nd Vikings Classical 2025				Tournament BC Schools Chess Festival 2025
		date 2025-05-24	rnd 5	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Bopi, H (Hlelokuhle)				Opponent Gwana, L (Libubomi)
2	4	Tournament 2025 Buffalo City Chess Trials 3				Tournament 2025 Buffalo City Chess Trials 3
		date 2025-05-10	rnd 1	type Standard	result 1	date 2025-05-10	rnd 4	type Standard	result 1
		Opponent Bungane, L (Limile)				Opponent Tumbare, N (Nicole)
3	3	Tournament Buffalo City Chess Junior Closed 2025				Tournament EC Closed 2025
		date 2025-08-16	rnd 5	type Standard	result 1	date 2025-09-06	rnd 2	type Standard	result 1
		Opponent Maciki, I (Ibenathi)				Opponent Gwana, L (Libubomi)

#	Games	Start				End
1	4	Tournament Rapid Feb 2nd Leg 2025				Tournament Rapid Feb 2nd Leg 2025
		date 2025-02-22	rnd 2	type Rapid	result 1	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Matabata, O (Othawe)				Opponent Tayi, M (Milani)
2	2	Tournament Beacon Bay Winter Cup 2025				Tournament Beacon Bay Winter Cup 2025
		date 2025-07-09	rnd 1	type Rapid	result 1	date 2025-07-09	rnd 2	type Rapid	result 1
		Opponent Lufuso, M (Milisa)				Opponent Mahlontlwana, A (Avuzwa)
3	2	Tournament Rapid Feb Leg 1 2025				Tournament Rapid Feb Leg 1 2025
		date 2025-02-15	rnd 5	type Rapid	result 1	date 2025-02-15	rnd 6	type Rapid	result 1
		Opponent Malik, A (Ateeb)				Opponent Gula, U (Ululutho)

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	Lin ,Y (Yihang)	4	0	-425	3	0	-425	1	0	-425	0	0	0
1	Lin ,Y (Yihang)	4	1348.1	923.1	3	1315.1	923.1	1	1285.1	923.1	0	0	0
2	Maciki ,I (Ibenathi)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
2	Maciki ,I (Ibenathi)	3	1339.7	1481.4	3	1339.1	1481.4	0	0	0	0	0	0
3	Tumbare ,N (Nicole)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
3	Tumbare ,N (Nicole)	3	1440.8	1440.8	3	1450	1440.8	0	0	0	0	0	0
4	Balura ,T (Tumi)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
4	Balura ,T (Tumi)	3	1504.9	1363.2	3	1501.3	1363.2	0	0	0	0	0	0
5	Kuo ,C (Chih-Hsun)	3	1.5	0	2	1.5	212.5	1	0	-425	0	0	0
5	Kuo ,C (Chih-Hsun)	3	1234.1	1234.1	2	1212.5	1446.6	1	1200	809.1	0	0	0
6	Lin ,Y (Yifan)	3	0	-425	1	0	-425	2	0	-425	0	0	0
6	Lin ,Y (Yifan)	3	1512.1	1087.1	1	1513.8	1087.1	2	1200	1087.1	0	0	0
7	Bopi ,H (Hlelokuhle)	2	2	425	2	2	425	0	0	0	0	0	0
7	Bopi ,H (Hlelokuhle)	2	1237.9	1662.9	2	1234.2	1662.9	0	0	0	0	0	0
8	Marais ,D (Damon)	2	2	425	2	2	425	0	0	0	0	0	0
8	Marais ,D (Damon)	2	1226	1651	2	1223.2	1651	0	0	0	0	0	0
9	Boshoff ,T (Traiton)	2	2	425	2	2	425	0	0	0	0	0	0
9	Boshoff ,T (Traiton)	2	1185.2	1610.2	2	1181.3	1610.2	0	0	0	0	0	0
10	Gertze ,L (Liam-James)	2	2	425	2	2	425	0	0	0	0	0	0
10	Gertze ,L (Liam-James)	2	1192	1617	2	1190	1617	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Weng, J (Jiajia)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms