Chess South Africa Ratings Database

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Personal

Zheng, Y (Yi)

Chess SA id

1110140745

FIDE id

Date of birth

2011-07-19 (U16)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-12

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1280.3

Item	Main	Standard	Rapid	Blitz
Rating	1376.8	1367.9	1365	1200
Raw rating	1325.2	1307.6	1365	1200
Weighted rating	1376.8	1367.9	1356.7	1200
Weighted performance	1184.6	1170.9	1164.3	0
Floor	930.7	922.1	932	700
K-factor	32	32	32	36
Min/Max rating change allowed	138.7	142.3	131.1	165.8
Highest rating	1520.3 2024-04-01	1422.1 2025-01-01	1464.9 2022-05-01	1200 2018-10-01
Highest raw rating	1430.7 2025-01-01	1422.1 2025-01-01	1432 2024-06-01	1200 2024-02-01
Highest weighted rating	1430.7 2025-03-01	1371.5 2025-09-30	1348.2 2025-08-01	1200 2018-10-01
Highest weighted performance	1520.3 2024-04-01	1418 2025-01-01	1464.9 2022-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.9	-3.9	0	0
New rating	1374	1364	1365	1200
Analysis
Rating	1376.8	1367.9	1365	1200
Raw rating	1325.2	1307.6	1365	1200
Weighted rating	1376.8	1367.9	1356.7
Weighted performance	1184.6	1170.9	1164.3
K-factor	32	32	32	36
Floor	930.7	922.1	932	700
Max/Min rating change allowed	138.7	142.3	131.1	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	1325.2	1307.6	1365	1200
New weighted rating	1374	1364	1359.4	1200
New weighted performance	1177.4	1163.8	1156.6	0
Temp new rating	1374	1364	1365	1200
Temp new rating +/-	-2.9	-3.9	0	0
Final new rating +/-	-2.9	-3.9	0	0
New rating	1374	1364	1365	1200
New K-factor	32	32	32	36
New floor	930.7	922.1	932	700

Item	Main	Standard	Rapid
	0	0	0
	53	47	6
	69	42	27
	46	12	34
	19	5	14
	0	0	0
History	187	106	81

Games since
	Main 133	Standard 89		Rapid 44		Blitz 0
Gender	Male
Age group	U16
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	2424		759		111
Male	1957		588		82
U16	381		126		24
U16 Male	286		89		17
Standard
	RSA		Province		Region
Overall	2453		687		101
Male	1977		525		73
U16	388		121		22
U16 Male	294		87		16
Rapid
	RSA		Province		Region
Overall	704		365		58
Male	587		303		44
U16	103		57		11
U16 Male	79		45		9
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	53	26.5	50	0	1305.3	1305.3
Standard	47	22.5	47.87	-18.1	1316.7	1298.6
Rapid	6	4	66.67	141.7	1216.1	1357.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	187	104.5	55.88	50	1307.9	1357.9
Standard	106	58	54.72	40.1	1326.7	1366.8
Rapid	81	46.5	57.41	63	1283.4	1346.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1325.2	1307.6	1365	1200
2025-09-30	1382.9	1373.8	1365	1200
2025-09-01	1363.5	1353	1365	1200
2025-08-01	1376.6	1368.2	1365	1200
2025-07-01	1373.7	1364.4	1363.4	1200
2025-06-01	1382.7	1373.8	1363.4	1200
2025-05-01	1382.7	1373.8	1363.4	1200
2025-04-01	1365.3	1353	1363.4	1200
2025-03-01	1394.5	1379.2	1363.4	1200
2025-02-01	1393.9	1378.2	1363.4	1200
2025-01-01	1430.7	1422.1	1363.4	1200
2024-12-01	1391.4	1381.8	1363.4	1200
2024-11-01	1391.4	1381.8	1363.4	1200
2024-10-01	1376.8	1377	1363.4	1200
2024-09-01	1405.5	1416.4	1363.4	1200
2024-08-01	1405.5	1416.4	1363.4	1200
2024-07-01	1422.1	1411	1402.1	1200
2024-09-01	1421.5	1370.7	1432	1200
2024-05-01	1373	1368.6	1264.1	1200
2024-04-01	1355.3	1368.6	1206.8	1200
2024-03-01	1275.2	1286.9	1206.8	1200
2024-02-01	1227.7	1237.6	1206.8	1200
2024-01-01	1227.7	1237.6	1206.8	1200
2023-12-01	1227.7	1237.6	1206.8	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	UCT Open Chess Championship 2025 (Intermediate)	2025-10-11	2025-10-12	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
2	Western Cape Schools - Top Schools 2025 (U15)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	3	2	Yes	Analysis
3	CT Metro District East Top Schools Chess 2025 (U15)	2025-08-02	2025-08-03	Standard	Cape Town (WCT)	5	2	1	Yes	Analysis
4	4th Curro Durbanville Rapid Open 2025 (Intermediate)	2025-07-19	2025-07-19	Rapid	Cape Town (WCT)	7	6	4	Yes	Analysis
5	Helderberg Chess Club Open 2025 (B)	2025-06-07	2025-06-08	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
6	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
7	Cape Town Open Chess Festival 2025 (C)	2025-03-22	2025-03-23	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
8	CT Metro Schools Individual Closed 2025 (U15 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
9	CT Metro District East Schools Chess Individuals Trials 2025 (U15 Boys)	2025-02-01	2025-02-02	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
10	2025 Kraaifontein Open Chess Championships (Advanced)	2025-01-04	2025-01-05	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	UCT Open Chess Championship 2025 (Intermediate)	2025-10-11	2025-10-12	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
2	Western Cape Schools - Top Schools 2025 (U15)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	3	2	Yes	Analysis
3	CT Metro District East Top Schools Chess 2025 (U15)	2025-08-02	2025-08-03	Standard	Cape Town (WCT)	5	2	1	Yes	Analysis
4	4th Curro Durbanville Rapid Open 2025 (Intermediate)	2025-07-19	2025-07-19	Rapid	Cape Town (WCT)	7	6	4	Yes	Analysis
5	Helderberg Chess Club Open 2025 (B)	2025-06-07	2025-06-08	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
6	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
7	Cape Town Open Chess Festival 2025 (C)	2025-03-22	2025-03-23	Standard	Cape Town (WCT)	6	6	2.5	Yes	Analysis
8	CT Metro Schools Individual Closed 2025 (U15 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
9	CT Metro District East Schools Chess Individuals Trials 2025 (U15 Boys)	2025-02-01	2025-02-02	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
10	2025 Kraaifontein Open Chess Championships (Advanced)	2025-01-04	2025-01-05	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
11	2nd Strategize To Win Round-Robin Tournament ACL 2024 (E)	2024-12-07	2024-12-07	Standard	Cape Town (WCT)	5	5	4	Yes	Analysis
12	Grant East Annual Primary School Invitational Chess Tournament 2024 (U13)	2024-10-05	2024-10-05	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
13	Chess Elevation Series -September 2024 (Open)	2024-09-20	2024-09-21	Standard	Cape Town (WCT)	5	4	1.5	Yes	Analysis
14	Curro Durbanville Chess Rapid Open 2024 (Intermediate)	2024-07-13	2024-07-13	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
15	Chess Elevation Series - July 2024 (Level 3)	2024-07-05	2024-07-06	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis
16	Rylib Winter Slam 2024 (Championship)	2024-06-19	2024-06-19	Rapid	Cape Town (WCT)	6	6	1.5	Yes	Analysis
17	4th BC Trials 2024 (U10B)	2024-06-08	2024-06-08	Standard	Buffalo City (EBC)	5	0	0	No	Analysis
18	Cape Town Chess Federation Closed Chess Championships 2024 (U14)	2024-06-15	2024-06-16	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
19	Cape Town Junior League Finals 2024 (U13 Open A)	2024-05-18	2024-05-18	Rapid	Cape Town (WCT)	5	5	4	Yes	Analysis
20	Western Cape PS Individuals Championship 2024 (U13 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
21	Cape Town Junior League - Qualifier 2 2024 (U13)	2024-04-20	2024-04-20	Rapid	Cape Town (WCT)	6	4	4	Yes	Analysis
22	Cape Town Junior League Qualifier 2024 (U13 Open)	2024-04-06	2024-04-06	Rapid	Cape Town (WCT)	6	6	5	Yes	Analysis
23	Cape Town Metro Schools Chess Closed Individuals 2024 (U13 Boys)	2024-03-02	2024-03-03	Standard	Cape Town (WCT)	6	6	5	Yes	Analysis
24	CT District East Schools Chess Individuals Trails 2024 (U13 Boys)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	5	4	Yes	Analysis
25	Kraaifontein Open 2023 (Open)	2023-12-10	2023-12-10	Rapid	Cape Town (WCT)	6	5	1	Yes	Analysis
26	Kraaifontein Open 2023 (U14)	2023-12-09	2023-12-09	Rapid	Cape Town (WCT)	6	6	0	Yes	Analysis
27	Western Cape Closed Championship 2023 (U14)	2023-09-23	2023-09-23	Rapid	Cape Town (WCT)	6	6	2.5	Yes	Analysis
28	Curro Durbanville Chess Open Rapid 2023 (U14)	2023-07-15	2023-07-15	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
29	WP Closed 2023 (U14)	2023-06-16	2023-06-17	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
30	Rhenish Primary Tournament 2023 (U14)	2023-05-13	2023-05-13	Rapid	Cape Winelands (WCW)	6	5	4.5	Yes	Analysis
31	Cape Town Open 2023 (U14)	2023-03-25	2023-03-25	Rapid	Cape Town (WCT)	6	6	5	Yes	Analysis
32	District East Schools Chess Individual Trials 2023 (U13 Boys)	2023-02-03	2023-02-04	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
33	Kraaifontein Open 2022 (Intermediate)	2022-12-17	2022-12-18	Standard	Cape Town (WCT)	6	5	1.5	Yes	Analysis
34	Kraaifontein Rapid Open 2022 (U12)	2022-12-16	2022-12-16	Rapid	Cape Town (WCT)	6	5	3	Yes	Analysis
35	Metro Rapid 2022 (U11 Boys)	2022-10-22	2022-10-22	Rapid	Cape Town (WCT)	5	4	2	Yes	Analysis
36	Rhenish Primary Tournament 2022 (U12)	2022-05-14	2022-05-14	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis

#	Games	Start				End
1	14	Tournament CT District East Schools Chess Individuals Trails 2024				Tournament Cape Town Junior League Qualifier 2024
		date 2024-02-03	rnd 2	type Standard	result 1	date 2024-04-06	rnd 4	type Rapid	result 1
		Opponent Greyling, L (Laurens)				Opponent Nyokana, I (Imange)
2	9	Tournament Cape Town Open 2023				Tournament WP Closed 2023
		date 2023-03-25	rnd 4	type Rapid	result 1	date 2023-06-16	rnd 1	type Standard	result 1
		Opponent Sobada, A (Anelisa)				Opponent Devanunthan, N (Nivash)
3	6	Tournament Cape Town Junior League Qualifier 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-04-06	rnd 6	type Rapid	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent House, J (Josh)				Opponent Louw, E (E-Jay)

#	Games	Start				End
1	11	Tournament CT District East Schools Chess Individuals Trails 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-02-03	rnd 2	type Standard	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent Greyling, L (Laurens)				Opponent Louw, E (E-Jay)
2	5	Tournament 2nd Strategize To Win Round-Robin Tournament ACL 2024				Tournament 2nd Strategize To Win Round-Robin Tournament ACL 2024
		date 2024-12-07	rnd 1	type Standard	result 0.5	date 2024-12-07	rnd 5	type Standard	result 1
		Opponent Wiggill, H (Handre)				Opponent Ramonyaluoe, M (Madalitso)
3	5	Tournament Cape Town Chess Federation Closed Chess Championships 2024				Tournament Chess Elevation Series - July 2024
		date 2024-06-16	rnd 6	type Standard	result 1	date 2024-07-06	rnd 4	type Standard	result 1
		Opponent Spence, B (Brian)				Opponent Isaacs, T (Tyrique)

#	Games	Start				End
1	11	Tournament Cape Town Open 2023				Tournament Curro Durbanville Chess Open Rapid 2023
		date 2023-03-25	rnd 4	type Rapid	result 1	date 2023-07-15	rnd 3	type Rapid	result 0.5
		Opponent Sobada, A (Anelisa)				Opponent Haman, R (Rico)
2	9	Tournament Cape Town Junior League Qualifier 2024				Tournament Cape Town Junior League Finals 2024
		date 2024-04-06	rnd 6	type Rapid	result 1	date 2024-05-18	rnd 4	type Rapid	result 1
		Opponent House, J (Josh)				Opponent Adolf, F (Feraydo)
3	5	Tournament Kraaifontein Open 2023				Tournament Cape Town Junior League Qualifier 2024
		date 2023-12-10	rnd 6	type Rapid	result 1	date 2024-04-06	rnd 4	type Rapid	result 1
		Opponent Van Nugteren, N (Nadia)				Opponent Nyokana, I (Imange)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament Cape Town Open 2023				Tournament Rhenish Primary Tournament 2023
		date 2023-03-25	rnd 4	type Rapid	result 1	date 2023-05-13	rnd 4	type Rapid	result 1
		Opponent Sobada, A (Anelisa)				Opponent Davis, J (Joshua)
2	6	Tournament Cape Town Junior League Qualifier 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-04-06	rnd 6	type Rapid	result 1	date 2024-05-04	rnd 1	type Standard	result 1
		Opponent House, J (Josh)				Opponent Louw, E (E-Jay)
3	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Junior League Qualifier 2024
		date 2024-03-03	rnd 5	type Standard	result 1	date 2024-04-06	rnd 4	type Rapid	result 1
		Opponent Sher, J (Jonah)				Opponent Nyokana, I (Imange)

#	Games	Start				End
1	5	Tournament CT District East Schools Chess Individuals Trails 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-02-03	rnd 2	type Standard	result 1	date 2024-03-02	rnd 1	type Standard	result 1
		Opponent Greyling, L (Laurens)				Opponent Schultz, T (Torsten)
2	4	Tournament 2025 Kraaifontein Open Chess Championships				Tournament CT Metro District East Schools Chess Individuals Trials 2025
		date 2025-01-05	rnd 6	type Standard	result 1	date 2025-02-01	rnd 3	type Standard	result 1
		Opponent Cupido, C (Caylah)				Opponent Ziki, M (Melvin)
3	3	Tournament Western Cape Schools Individual Championship 2025				Tournament Helderberg Chess Club Open 2025
		date 2025-04-27	rnd 6	type Standard	result 1	date 2025-06-07	rnd 2	type Standard	result 1
		Opponent Samuels, A (Alex-John)				Opponent Magwaza, G (Gilmore)

#	Games	Start				End
1	9	Tournament Cape Town Junior League Qualifier 2024				Tournament Cape Town Junior League Finals 2024
		date 2024-04-06	rnd 6	type Rapid	result 1	date 2024-05-18	rnd 4	type Rapid	result 1
		Opponent House, J (Josh)				Opponent Adolf, F (Feraydo)
2	7	Tournament Cape Town Open 2023				Tournament Rhenish Primary Tournament 2023
		date 2023-03-25	rnd 4	type Rapid	result 1	date 2023-05-13	rnd 4	type Rapid	result 1
		Opponent Sobada, A (Anelisa)				Opponent Davis, J (Joshua)
3	5	Tournament Kraaifontein Open 2023				Tournament Cape Town Junior League Qualifier 2024
		date 2023-12-10	rnd 6	type Rapid	result 1	date 2024-04-06	rnd 4	type Rapid	result 1
		Opponent Van Nugteren, N (Nadia)				Opponent Nyokana, I (Imange)

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	Guo ,A (Aleks)	4	1	-212.5	3	1	-141.7	1	0	-425	0	0	0
1	Guo ,A (Aleks)	4	1445.7	1233.2	3	1396	1304	1	1343.5	1020.7	0	0	0
2	Spence ,B (Brian)	4	3	212.5	1	1	425	3	2	141.7	0	0	0
2	Spence ,B (Brian)	4	1289.7	1502.2	1	1244.6	1714.7	3	1264.4	1431.4	0	0	0
3	Webb ,A (Amori)	2	2	425	2	2	425	0	0	0	0	0	0
3	Webb ,A (Amori)	2	1308.1	1733.1	2	1284.3	1733.1	0	0	0	0	0	0
4	Hagan ,T (Tristin)	2	1	0	2	1	0	0	0	0	0	0	0
4	Hagan ,T (Tristin)	2	1238.8	1238.8	2	1218.2	1238.8	0	0	0	0	0	0
5	Janse Van Rensburg ,D (Daniel)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
5	Janse Van Rensburg ,D (Daniel)	2	1295.7	1083.2	2	1280.9	1083.2	0	0	0	0	0	0
6	Sher ,J (Jonah)	2	1	0	1	1	425	1	0	-425	0	0	0
6	Sher ,J (Jonah)	2	1248	1248	1	1264.4	1673	1	1220	823	0	0	0
7	Muller ,H (Helgard)	2	1	0	1	1	425	1	0	-425	0	0	0
7	Muller ,H (Helgard)	2	1446.6	1446.6	1	1404.1	1871.6	1	1442.5	1021.6	0	0	0
8	Scheepers ,R (Riko)	2	1	0	1	1	425	1	0	-425	0	0	0
8	Scheepers ,R (Riko)	2	1287.8	1287.8	1	1312.5	1712.8	1	1233.9	862.8	0	0	0
9	Adolf ,F (Feraydo)	2	2	425	1	1	425	1	1	425	0	0	0
9	Adolf ,F (Feraydo)	2	1275.3	1700.3	1	1177.2	1700.3	1	1329.7	1700.3	0	0	0
10	Tshenolo ,T (Tsamai)	2	2	425	1	1	425	1	1	425	0	0	0
10	Tshenolo ,T (Tsamai)	2	1200	1625	1	1200	1625	1	1200	1625	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Zheng, Y (Yi)

Ratings

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Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms