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

2025-10-18

Personal details last changed

2025-02-23

Junior GPX Games

87.2

Junior GPX Points

1270.8

Item	Main	Standard	Rapid	Blitz
Rating	1507.3	1516.3	1328.4	1200
Raw rating	1442.9	1439.1	1328.4	1200
Weighted rating	1315.6	1312.5	1240.7	1200
Weighted performance	1507.3	1516.3	0	0
Floor	949.6	952.8	828.4	700
K-factor	32	32	36	36
Min/Max rating change allowed	117.3	117.9	138.1	165.8
Highest rating	1507.3 2025-11-01	1516.3 2025-11-01	1328.4 2025-11-01	1200 2025-03-01
Highest raw rating	1449.6 2025-09-01	1452.8 2025-09-01	1328.4 2025-11-01	1200 2025-03-01
Highest weighted rating	1315.6 2025-11-01	1312.5 2025-11-01	1240.7 2025-11-01	1200 2025-03-01
Highest weighted performance	1507.3 2025-11-01	1516.3 2025-11-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-8.9	-9	0	0
New rating	1498.4	1507.3	1328.4	1200
Analysis
Rating	1507.3	1516.3	1328.4	1200
Raw rating	1442.9	1439.1	1328.4	1200
Weighted rating	1315.6	1312.5	1240.7
Weighted performance	1507.3	1516.3	0
K-factor	32	32	36	36
Floor	949.6	952.8	828.4	700
Max/Min rating change allowed	117.3	117.9	138.1	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	1442.9	1439.1	1328.4	1200
New weighted rating	1329.5	1326.2	1249	1200
New weighted performance	1498.4	1507.3	0	0
Temp new rating	1498.4	1507.3	1328.4	1200
Temp new rating +/-	-8.9	-9	0	0
Final new rating +/-	-8.9	-9	0	0
New rating	1498.4	1507.3	1328.4	1200
New K-factor	32	32	36	36
New floor	949.6	952.8	828.4	700

Item	Main	Standard	Rapid
	0	0	0
	106	79	27
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	106	79	27

Games since
	Main 106	Standard 79		Rapid 27		Blitz 0
Gender	Female
Age group	U12
Region	Buffalo City (EBC)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	1218		135		49
Female	152		16		7
U12	120		10		4
U12 Female	29		1		1
Standard
	RSA		Province		Region
Overall	1087		123		50
Female	135		15		8
U12	109		11		4
U12 Female	28		1		1
Rapid
	RSA		Province		Region
Overall	889		68		20
Female	140		10		2
U12	142		5		3
U12 Female	38		2		1
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	106	66	62.26	104.2	1292.7	1396.9
Standard	79	49	62.03	102.2	1297.1	1399.4
Rapid	27	17	62.96	110.2	1279.6	1389.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	106	66	62.26	104.2	1292.7	1396.9
Standard	79	49	62.03	102.2	1297.1	1399.4
Rapid	27	17	62.96	110.2	1279.6	1389.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1442.9	1439.1	1328.4	1200
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
2024-09-01	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
2024-01-01	1200	1200	1200	1200
2023-12-01	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	Chess Vikings Trials 2 2025 (C)	2025-10-18	2025-10-18	Standard	Buffalo City (EBC)	5	5	3.5	Yes	Analysis
2	BC Open 2025 (U10-U14)	2025-10-04	2025-10-04	Rapid	Buffalo City (EBC)	7	7	5	Yes	Analysis
3	Buffalo City Chess Clubs League 2025 (B)	2025-09-20	2025-09-20	Standard	Buffalo City (EBC)	6	4	1	Yes	Analysis
4	EC Closed 2025 (U12 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	4.5	Yes	Analysis
5	Buffalo City Chess Junior Closed 2025 (U12 Girls)	2025-08-16	2025-08-16	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
6	3rd Chess Vikings Open Championship 2025 (C)	2025-08-02	2025-08-02	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
7	BC Schools Chess Festival 2025 (U11 Girls)	2025-07-26	2025-07-26	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
8	Beacon Bay Winter Cup 2025 (B)	2025-07-09	2025-07-09	Rapid	Buffalo City (EBC)	6	6	4	Yes	Analysis
9	2nd Vikings Classical 2025 (C)	2025-05-24	2025-05-24	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
10	2025 Buffalo City Chess Trials 3 (U12)	2025-05-10	2025-05-10	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
11	EC Open 2025 (U8-U14 Girls)	2025-05-02	2025-05-02	Standard	Buffalo City (EBC)	7	7	3.5	Yes	Analysis
12	Vikings Holiday 2025 (C)	2025-04-05	2025-04-05	Standard	Buffalo City (EBC)	5	4	3.5	Yes	Analysis
13	2025 Buffalo City Chess Trials 2 (U12)	2025-04-12	2025-04-12	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
14	2025 Buffalo City Chess Trials 1 (U12)	2025-03-22	2025-03-22	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
15	Vikings Classical March 2025 (U12)	2025-03-15	2025-03-15	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
16	Hudson League 1 2025	2025-02-10	2025-02-13	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
17	Rapid Feb 2nd Leg 2025 (U12)	2025-02-22	2025-02-22	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
18	Rapid Feb Leg 1 2025 (U12)	2025-02-15	2025-02-15	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
19	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	Chess Vikings Trials 2 2025 (C)	2025-10-18	2025-10-18	Standard	Buffalo City (EBC)	5	5	3.5	Yes	Analysis
2	BC Open 2025 (U10-U14)	2025-10-04	2025-10-04	Rapid	Buffalo City (EBC)	7	7	5	Yes	Analysis
3	Buffalo City Chess Clubs League 2025 (B)	2025-09-20	2025-09-20	Standard	Buffalo City (EBC)	6	4	1	Yes	Analysis
4	EC Closed 2025 (U12 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	4.5	Yes	Analysis
5	Buffalo City Chess Junior Closed 2025 (U12 Girls)	2025-08-16	2025-08-16	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
6	3rd Chess Vikings Open Championship 2025 (C)	2025-08-02	2025-08-02	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
7	BC Schools Chess Festival 2025 (U11 Girls)	2025-07-26	2025-07-26	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
8	Beacon Bay Winter Cup 2025 (B)	2025-07-09	2025-07-09	Rapid	Buffalo City (EBC)	6	6	4	Yes	Analysis
9	2nd Vikings Classical 2025 (C)	2025-05-24	2025-05-24	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
10	2025 Buffalo City Chess Trials 3 (U12)	2025-05-10	2025-05-10	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
11	EC Open 2025 (U8-U14 Girls)	2025-05-02	2025-05-02	Standard	Buffalo City (EBC)	7	7	3.5	Yes	Analysis
12	Vikings Holiday 2025 (C)	2025-04-05	2025-04-05	Standard	Buffalo City (EBC)	5	4	3.5	Yes	Analysis
13	2025 Buffalo City Chess Trials 2 (U12)	2025-04-12	2025-04-12	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
14	2025 Buffalo City Chess Trials 1 (U12)	2025-03-22	2025-03-22	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
15	Vikings Classical March 2025 (U12)	2025-03-15	2025-03-15	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
16	Hudson League 1 2025	2025-02-10	2025-02-13	Standard	Buffalo City (EBC)	6	6	3	Yes	Analysis
17	Rapid Feb 2nd Leg 2025 (U12)	2025-02-22	2025-02-22	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
18	Rapid Feb Leg 1 2025 (U12)	2025-02-15	2025-02-15	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
19	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 BC Open 2025				Tournament Chess Vikings Trials 2 2025
		date 2025-10-04	rnd 6	type Rapid	result 1	date 2025-10-18	rnd 3	type Standard	result 1
		Opponent Mtwecu, Y (Yanga)				Opponent Christensen, M (Mia)
2	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)
3	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)

#	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	Marais ,D (Damon)	2	2	425	2	2	425	0	0	0	0	0	0
7	Marais ,D (Damon)	2	1226	1651	2	1223.2	1651	0	0	0	0	0	0
8	Swales ,L (Logan Richard)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Swales ,L (Logan Richard)	2	1492.8	1067.8	2	1497.4	1067.8	0	0	0	0	0	0
9	Gertze ,L (Liam-James)	2	2	425	2	2	425	0	0	0	0	0	0
9	Gertze ,L (Liam-James)	2	1192	1617	2	1190	1617	0	0	0	0	0	0
10	Rubushe ,L (Lunabe)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Rubushe ,L (Lunabe)	2	1228.9	803.9	2	1236	803.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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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