Chess South Africa Ratings Database

PLAYER PAGE

Personal

Weng, J (Jack (Xu))

Chess SA id

1040143829

FIDE id

Date of birth

2004-01-24 (Adult)

Gender

Male

Region

Mangaung (FMB)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-07-28

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1209.8	1270.6	1088.7	1200
Raw rating	1209.8	1270.6	1088.7	1200
Weighted rating	1209.3	1270.6	1088	1200
Weighted performance	782.4	0	686.6	0
Floor	757.8	772	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	163.5	149.9	194.3	165.8
Highest rating	1496.7 2022-07-01	1508.9 2022-07-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1257.8 2022-08-01	1272 2022-08-01	1200 2019-12-01	1200 2024-03-01
Highest weighted rating	1257.8 2023-07-01	1272 2025-04-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1496.7 2022-07-01	1508.9 2022-07-01	1200 2019-12-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1209.8	1270.6	1088.7	1200
Analysis
Rating	1209.8	1270.6	1088.7	1200
Raw rating	1209.8	1270.6	1088.7	1200
Weighted rating	1209.3	1270.6	1088
Weighted performance	782.4	0	686.6
K-factor	36	36	36	36
Floor	757.8	772	700	700
Max/Min rating change allowed	163.5	149.9	194.3	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	1209.8	1270.6	1088.7	1200
New weighted rating	1209.4	1270.6	1088.1	1200
New weighted performance	775.8	0	680.4	0
Temp new rating	1209.8	1270.6	1088.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1209.8	1270.6	1088.7	1200
New K-factor	36	36	36	36
New floor	757.8	772	700	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	19	10	9
	24	10	14
	0	0	0
History	43	20	23

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Mangaung (FMB)
Province	Free State (FS)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	43	18.5	43.02	-59.3	1295.4	1236.1
Standard	20	11	55	42.5	1281.3	1323.8
Rapid	23	7.5	32.61	-147.8	1307.6	1159.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1209.8	1270.6	1088.7	1200
2025-09-30	1209.8	1270.6	1088.7	1200
2025-09-01	1209.8	1270.6	1088.7	1200
2025-08-01	1209.8	1270.6	1088.7	1200
2025-07-01	1209.8	1270.6	1088.7	1200
2025-06-01	1209.8	1270.6	1088.7	1200
2025-05-01	1209.8	1270.6	1088.7	1200
2025-04-01	1209.8	1270.6	1088.7	1200
2025-03-01	1209.8	1270.6	1088.7	1200
2025-02-01	1209.8	1270.6	1088.7	1200
2025-01-01	1208.5	1270.6	1086.8	1200
2024-12-01	1208.5	1270.6	1086.8	1200
2024-11-01	1208.5	1270.6	1086.8	1200
2024-10-01	1208.5	1270.6	1086.8	1200
2024-09-01	1208.5	1270.6	1086.8	1200
2024-08-01	1208.5	1270.6	1086.8	1200
2024-07-01	1208.5	1270.6	1086.8	1200
2024-09-01	1208.5	1270.6	1086.8	1200
2024-05-01	1208.5	1270.6	1086.8	1200
2024-04-01	1208.5	1270.6	1086.8	1200
2024-03-01	1208.5	1270.6	1086.8	1200
2024-02-01	1208.5	1270.6	1086.8	1200
2024-01-01	1208.5	1270.6	1086.8	1200
2023-12-01	1208.5	1270.6	1086.8	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	Morris Club Championship 2023	2023-07-28	2023-07-28	Rapid	Mangaung (FMB)	5	5	0	Yes	Analysis
2	Inter Regional Chess Championship 2023 (U20)	2023-05-19	2023-05-20	Standard	Mangaung (FMB)	5	5	3	Yes	Analysis
3	Grey College Team Championship 2023 (A)	2023-02-03	2023-02-04	Standard	Mangaung (FMB)	5	5	2	Yes	Analysis
4	Kings & Queens Chess 21 January 2023 (A)	2023-01-21	2023-01-21	Rapid	Mangaung (FMB)	5	4	2	Yes	Analysis
5	Courteney Page Chess Festival 2022 (A+B)	2022-10-15	2022-10-15	Rapid	Mangaung (FMB)	5	4	0.5	Yes	Analysis
6	Kiriakos Michalakis Chess Festival 2022 (A)	2022-09-23	2022-09-23	Standard	Mangaung (FMB)	5	5	2	Yes	Analysis
7	Bloemfontein School League 2022 (U19)	2022-08-12	2022-08-12	Rapid	Mangaung (FMB)	5	5	3	Yes	Analysis
8	Mangaung Metro Chess 13 August 2022 (A)	2022-08-13	2022-08-13	Rapid	Mangaung (FMB)	5	5	2	Yes	Analysis
9	8th Piet Van Zyl Chess Festival 2022 (C)	2022-07-22	2022-07-23	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis

#	Games	Start				End
1	4	Tournament 8th Piet Van Zyl Chess Festival 2022				Tournament 8th Piet Van Zyl Chess Festival 2022
		date 2022-07-22	rnd 1	type Standard	result 1	date 2022-07-23	rnd 4	type Standard	result 1
		Opponent Maass, A (Ane)				Opponent Jonkers, P (Poloko)
2	2	Tournament Inter Regional Chess Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-05-20	rnd 4	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Paul, P (Phemello)				Opponent Human, L (Lara)
3	2	Tournament Grey College Team Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-19	rnd 1	type Standard	result 1
		Opponent Poloko, T (Toano)				Opponent Michalakis, G (Gina)

#	Games	Start				End
1	4	Tournament 8th Piet Van Zyl Chess Festival 2022				Tournament 8th Piet Van Zyl Chess Festival 2022
		date 2022-07-22	rnd 1	type Standard	result 1	date 2022-07-23	rnd 4	type Standard	result 1
		Opponent Maass, A (Ane)				Opponent Jonkers, P (Poloko)
2	2	Tournament Inter Regional Chess Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-05-20	rnd 4	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Paul, P (Phemello)				Opponent Human, L (Lara)
3	2	Tournament Grey College Team Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-19	rnd 1	type Standard	result 1
		Opponent Poloko, T (Toano)				Opponent Michalakis, G (Gina)

#	Games	Start				End
1	2	Tournament Kings & Queens Chess 21 January 2023				Tournament Kings & Queens Chess 21 January 2023
		date 2023-01-21	rnd 3	type Rapid	result 1	date 2023-01-21	rnd 4	type Rapid	result 1
		Opponent Feldman, M (Matthew)				Opponent Mzamo, S (Sinekamva)
2	2	Tournament Mangaung Metro Chess 13 August 2022				Tournament Courteney Page Chess Festival 2022
		date 2022-08-13	rnd 5	type Rapid	result 1	date 2022-10-15	rnd 1	type Rapid	result 0.5
		Opponent Van Biljon, S (Sarel)				Opponent Lebenya, MJ (Masilonyana)
3	2	Tournament Bloemfontein School League 2022				Tournament Bloemfontein School League 2022
		date 2022-08-12	rnd 3	type Rapid	result 1	date 2022-08-12	rnd 4	type Rapid	result 1
		Opponent Colby, C (Cedric)				Opponent Nwenyi, P (Prince)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 8th Piet Van Zyl Chess Festival 2022				Tournament 8th Piet Van Zyl Chess Festival 2022
		date 2022-07-22	rnd 1	type Standard	result 1	date 2022-07-23	rnd 4	type Standard	result 1
		Opponent Maass, A (Ane)				Opponent Jonkers, P (Poloko)
2	2	Tournament Inter Regional Chess Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-05-20	rnd 4	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Paul, P (Phemello)				Opponent Human, L (Lara)
3	2	Tournament Grey College Team Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-19	rnd 1	type Standard	result 1
		Opponent Poloko, T (Toano)				Opponent Michalakis, G (Gina)

#	Games	Start				End
1	4	Tournament 8th Piet Van Zyl Chess Festival 2022				Tournament 8th Piet Van Zyl Chess Festival 2022
		date 2022-07-22	rnd 1	type Standard	result 1	date 2022-07-23	rnd 4	type Standard	result 1
		Opponent Maass, A (Ane)				Opponent Jonkers, P (Poloko)
2	2	Tournament Inter Regional Chess Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-05-20	rnd 4	type Standard	result 1	date 2023-05-20	rnd 5	type Standard	result 1
		Opponent Paul, P (Phemello)				Opponent Human, L (Lara)
3	2	Tournament Grey College Team Championship 2023				Tournament Inter Regional Chess Championship 2023
		date 2023-02-04	rnd 5	type Standard	result 1	date 2023-05-19	rnd 1	type Standard	result 1
		Opponent Poloko, T (Toano)				Opponent Michalakis, G (Gina)

#	Games	Start				End
1	2	Tournament Kings & Queens Chess 21 January 2023				Tournament Kings & Queens Chess 21 January 2023
		date 2023-01-21	rnd 3	type Rapid	result 1	date 2023-01-21	rnd 4	type Rapid	result 1
		Opponent Feldman, M (Matthew)				Opponent Mzamo, S (Sinekamva)
2	2	Tournament Bloemfontein School League 2022				Tournament Bloemfontein School League 2022
		date 2022-08-12	rnd 3	type Rapid	result 1	date 2022-08-12	rnd 4	type Rapid	result 1
		Opponent Colby, C (Cedric)				Opponent Nwenyi, P (Prince)
3	1	Tournament Mangaung Metro Chess 13 August 2022				Tournament Mangaung Metro Chess 13 August 2022
		date 2022-08-13	rnd 5	type Rapid	result 1	date 2022-08-13	rnd 5	type Rapid	result 1
		Opponent Van Biljon, S (Sarel)				Opponent Van Biljon, S (Sarel)

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	Smit ,A (Albert)	2	0	-425	1	0	-425	1	0	-425	0	0	0
1	Smit ,A (Albert)	2	1463.3	1038.3	1	1530	1038.3	1	1066.4	1038.3	0	0	0
2	Jordaan ,W (Wian)	2	0	-425	0	0	0	2	0	-425	0	0	0
2	Jordaan ,W (Wian)	2	1288.8	863.8	0	0	0	2	1076.8	863.8	0	0	0
3	Weng ,Y (Yu)	1	1	425	1	1	425	0	0	0	0	0	0
3	Weng ,Y (Yu)	1	1232.1	1657.1	1	1176	1657.1	0	0	0	0	0	0
4	Maass ,T (Tanya)	1	1	425	1	1	425	0	0	0	0	0	0
4	Maass ,T (Tanya)	1	1248.1	1673.1	1	1293.9	1673.1	0	0	0	0	0	0
5	Michalakis ,K (Kiriakos)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Michalakis ,K (Kiriakos)	1	1403.4	978.4	1	1395.3	978.4	0	0	0	0	0	0
6	Chang ,S (Sebastian)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Chang ,S (Sebastian)	1	1547.5	1122.5	1	1542.7	1122.5	0	0	0	0	0	0
7	Geyser ,K (Kobus)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Geyser ,K (Kobus)	1	1563	1138	1	1545.9	1138	0	0	0	0	0	0
8	Michalakis ,K (Kiriakos)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Michalakis ,K (Kiriakos)	1	1787.6	1362.6	1	1765.1	1362.6	0	0	0	0	0	0
9	Jonkers ,P (Poloko)	1	1	425	1	1	425	0	0	0	0	0	0
9	Jonkers ,P (Poloko)	1	1250.5	1675.5	1	1261.6	1675.5	0	0	0	0	0	0
10	Human ,L (Lara)	1	1	425	1	1	425	0	0	0	0	0	0
10	Human ,L (Lara)	1	1200	1625	1	1252.3	1625	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

Weng, J (Jack (Xu))

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms