Chess South Africa Ratings Database

PLAYER PAGE

Personal

Cheng, S (Serena)

Chess SA id

2130319374

FIDE id

Date of birth

2013-07-09 (U14)

Gender

Female

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

22.5

Junior GPX Points

1086.5

Item	Main	Standard	Rapid	Blitz
Rating	1270.7	1199.2	1292.8	1200
Raw rating	1270.7	1198.3	1292.8	1200
Weighted rating	1210.6	1199.2	1214.5	1200
Weighted performance	1244.1	0	0	0
Floor	770.7	699.9	792.8	700
K-factor	36	40	36	36
Min/Max rating change allowed	149.9	166.2	145.3	165.8
Highest rating	1270.7 2025-09-01	1199.9 2025-04-14	1292.8 2025-09-01	1200 2025-05-05
Highest raw rating	1270.7 2025-09-01	1199.9 2025-04-14	1292.8 2025-09-01	1200 2025-05-05
Highest weighted rating	1205.2 2025-09-01	1199.9 2025-04-14	1207.4 2025-09-01	1200 2025-05-05
Highest weighted performance	1256.7 2025-09-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	-0.1	0	0
New rating	1270.7	1199.1	1292.8	1200
Analysis
Rating	1270.7	1199.2	1292.8	1200
Raw rating	1270.7	1198.3	1292.8	1200
Weighted rating	1210.6	1199.2	1214.5
Weighted performance	1244.1	0	0
K-factor	36	40	36	36
Floor	770.7	699.9	792.8	700
Max/Min rating change allowed	149.9	166.2	145.3	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	1270.7	1198.3	1292.8	1200
New weighted rating	1215.8	1199.1	1221.3	1200
New weighted performance	1243.6	0	0	0
Temp new rating	1270.7	1199.1	1292.8	1200
Temp new rating +/-	0	-0.1	0	0
Final new rating +/-	0	-0.1	0	0
New rating	1270.7	1199.1	1292.8	1200
New K-factor	36	40	36	36
New floor	770.7	699.9	792.8	700

Item	Main	Standard	Rapid
	0	0	0
	30	15	15
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	30	15	15

Games since
	Main 30	Standard 15		Rapid 15		Blitz 0
Gender	Female
Age group	U14
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 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	30	15	50	0	1229.5	1229.5
Standard	15	5	33.33	-141.7	1234.3	1092.6
Rapid	15	10	66.67	141.7	1224.7	1366.4
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	30	15	50	0	1229.5	1229.5
Standard	15	5	33.33	-141.7	1234.3	1092.6
Rapid	15	10	66.67	141.7	1224.7	1366.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1270.7	1198.3	1292.8	1200
2025-09-01	1270.7	1198.3	1292.8	1200
2025-08-01	1198.5	1198.3	1200	1200
2025-07-01	1199.4	1199.2	1200	1200
2025-06-01	1196.4	1195.4	1200	1200
2025-05-01	1199.2	1199	1200	1200
2025-04-01	1200	1200	1200	1200
2025-03-01	1200	1200	1200	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	Ekurhuleni North Schools Teams 2025 (U13 Girls)	2025-08-16	2025-08-16	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
2	Benoni Clusters Team 2025 (U13 Girls A)	2025-08-09	2025-08-09	Rapid	Ekurhuleni (GE)	6	6	3	Yes	Analysis
3	Benoni Primary School Cluster Teams 2025 (U13B)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	5	4	3	Yes	Analysis
4	South African Open 2025 (U14 Girls)	2025-07-03	2025-07-05	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
5	Ekurhuleni Trials 2025 (E)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
6	Benoni Primary School Cluster 12 April 2025 (U13 Girls)	2025-04-12	2025-04-12	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Ekurhuleni North Schools Teams 2025 (U13 Girls)	2025-08-16	2025-08-16	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
2	Benoni Clusters Team 2025 (U13 Girls A)	2025-08-09	2025-08-09	Rapid	Ekurhuleni (GE)	6	6	3	Yes	Analysis
3	Benoni Primary School Cluster Teams 2025 (U13B)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	5	4	3	Yes	Analysis
4	South African Open 2025 (U14 Girls)	2025-07-03	2025-07-05	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
5	Ekurhuleni Trials 2025 (E)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
6	Benoni Primary School Cluster 12 April 2025 (U13 Girls)	2025-04-12	2025-04-12	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

#	Games	Start				End
1	3	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 3	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Maitse, R (Relebogile Reitumetse)				Opponent Mkhaliphi, A (Alwande)
2	3	Tournament South African Open 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-07-05	rnd 5	type Standard	result 1	date 2025-08-02	rnd 2	type Rapid	result 1
		Opponent Smith, MI (Melea Ine)				Opponent Abrahams, L (Lisa)
3	2	Tournament Benoni Clusters Team 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-09	rnd 6	type Rapid	result 1	date 2025-08-16	rnd 1	type Rapid	result 1
		Opponent Abrahams, L (Lisa)				Opponent Mazibuko, U (Uyanda)

#	Games	Start				End
1	1	Tournament South African Open 2025				Tournament South African Open 2025
		date 2025-07-05	rnd 5	type Standard	result 1	date 2025-07-05	rnd 5	type Standard	result 1
		Opponent Smith, MI (Melea Ine)				Opponent Smith, MI (Melea Ine)
2	1	Tournament South African Open 2025				Tournament South African Open 2025
		date 2025-07-04	rnd 3	type Standard	result 1	date 2025-07-04	rnd 3	type Standard	result 1
		Opponent Legodi, R (Reneilwe)				Opponent Legodi, R (Reneilwe)
3	1	Tournament Ekurhuleni Trials 2025				Tournament Ekurhuleni Trials 2025
		date 2025-05-24	rnd 4	type Standard	result 1	date 2025-05-24	rnd 4	type Standard	result 1
		Opponent Swanevelder, Z (Zianey)				Opponent Swanevelder, Z (Zianey)

#	Games	Start				End
1	3	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 3	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Maitse, R (Relebogile Reitumetse)				Opponent Mkhaliphi, A (Alwande)
2	2	Tournament Benoni Clusters Team 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-09	rnd 6	type Rapid	result 1	date 2025-08-16	rnd 1	type Rapid	result 1
		Opponent Abrahams, L (Lisa)				Opponent Mazibuko, U (Uyanda)
3	2	Tournament Benoni Clusters Team 2025				Tournament Benoni Clusters Team 2025
		date 2025-08-09	rnd 2	type Rapid	result 1	date 2025-08-09	rnd 3	type Rapid	result 1
		Opponent Du Plessis, L (Lume)				Opponent Abrahams, L (Lisa)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 3	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Maitse, R (Relebogile Reitumetse)				Opponent Mkhaliphi, A (Alwande)
2	3	Tournament South African Open 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-07-05	rnd 5	type Standard	result 1	date 2025-08-02	rnd 2	type Rapid	result 1
		Opponent Smith, MI (Melea Ine)				Opponent Abrahams, L (Lisa)
3	2	Tournament Benoni Clusters Team 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-09	rnd 6	type Rapid	result 1	date 2025-08-16	rnd 1	type Rapid	result 1
		Opponent Abrahams, L (Lisa)				Opponent Mazibuko, U (Uyanda)

#	Games	Start				End
1	1	Tournament South African Open 2025				Tournament South African Open 2025
		date 2025-07-05	rnd 5	type Standard	result 1	date 2025-07-05	rnd 5	type Standard	result 1
		Opponent Smith, MI (Melea Ine)				Opponent Smith, MI (Melea Ine)
2	1	Tournament South African Open 2025				Tournament South African Open 2025
		date 2025-07-04	rnd 3	type Standard	result 1	date 2025-07-04	rnd 3	type Standard	result 1
		Opponent Legodi, R (Reneilwe)				Opponent Legodi, R (Reneilwe)
3	1	Tournament Ekurhuleni Trials 2025				Tournament Ekurhuleni Trials 2025
		date 2025-05-24	rnd 4	type Standard	result 1	date 2025-05-24	rnd 4	type Standard	result 1
		Opponent Swanevelder, Z (Zianey)				Opponent Swanevelder, Z (Zianey)

#	Games	Start				End
1	3	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 3	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Maitse, R (Relebogile Reitumetse)				Opponent Mkhaliphi, A (Alwande)
2	2	Tournament Benoni Clusters Team 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-09	rnd 6	type Rapid	result 1	date 2025-08-16	rnd 1	type Rapid	result 1
		Opponent Abrahams, L (Lisa)				Opponent Mazibuko, U (Uyanda)
3	2	Tournament Benoni Clusters Team 2025				Tournament Benoni Clusters Team 2025
		date 2025-08-09	rnd 2	type Rapid	result 1	date 2025-08-09	rnd 3	type Rapid	result 1
		Opponent Du Plessis, L (Lume)				Opponent Abrahams, L (Lisa)

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	Maitse ,R (Relebogile Reitumetse)	3	1	-141.7	0	0	0	3	1	-141.7	0	0	0
1	Maitse ,R (Relebogile Reitumetse)	3	1288.5	1146.8	0	0	0	3	1212.9	1146.8	0	0	0
2	Abrahams ,L (Lisa)	3	3	425	0	0	0	3	3	425	0	0	0
2	Abrahams ,L (Lisa)	3	1225.2	1650.2	0	0	0	3	1200	1650.2	0	0	0
3	Du Plessis ,L (Lume)	3	1	-141.7	0	0	0	3	1	-141.7	0	0	0
3	Du Plessis ,L (Lume)	3	1212	1070.3	0	0	0	3	1200	1070.3	0	0	0
4	Blignaut ,A (Alma)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Blignaut ,A (Alma)	1	1174.1	749.1	1	1174.6	749.1	0	0	0	0	0	0
5	Peens ,C (Caitlyn)	1	1	425	1	1	425	0	0	0	0	0	0
5	Peens ,C (Caitlyn)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Theron ,F (Francois)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Theron ,F (Francois)	1	1224.6	799.6	1	1225.2	799.6	0	0	0	0	0	0
7	Van Zijl ,J (Joane)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Van Zijl ,J (Joane)	1	1188	763	1	1191	763	0	0	0	0	0	0
8	Van Rooyen ,Z (Zani)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Van Rooyen ,Z (Zani)	1	1323.2	898.2	1	1288.2	898.2	0	0	0	0	0	0
9	Van Der Westhuizen ,S (Simeon)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Van Der Westhuizen ,S (Simeon)	1	1255.6	830.6	1	1213.2	830.6	0	0	0	0	0	0
10	Pretorius ,A (Amore)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Pretorius ,A (Amore)	1	1245.7	820.7	1	1233.6	820.7	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

Cheng, S (Serena)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms