Chess South Africa Ratings Database

PLAYER PAGE

Personal

Yoon, YJ (Yea Jun)

Chess SA id

2110113439

FIDE id

Date of birth

2011-06-01 (U16)

Gender

Female

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-08-17

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1501.8	1422.5	1523.1	1200
Raw rating	1501.8	1422.5	1523.1	1200
Weighted rating	1498.3	1417	1519.8	1200
Weighted performance	1193.1	1156.3	1256.6	0
Floor	1002.7	922.5	1055.7	700
K-factor	32	32	32	36
Min/Max rating change allowed	107.9	120.8	104.6	165.8
Highest rating	1553.7 2024-04-01	1437.3 2024-05-01	1572.3 2024-04-01	1200 2018-10-01
Highest raw rating	1502.7 2024-05-01	1422.5 2024-06-01	1555.7 2024-05-01	1200 2024-03-01
Highest weighted rating	1491.5 2025-08-01	1408.6 2025-08-01	1512.7 2025-08-01	1200 2018-10-01
Highest weighted performance	1553.7 2024-04-01	1437.3 2024-05-01	1572.3 2024-04-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1501.8	1422.5	1523.1	1200
Analysis
Rating	1501.8	1422.5	1523.1	1200
Raw rating	1501.8	1422.5	1523.1	1200
Weighted rating	1498.3	1417	1519.8
Weighted performance	1193.1	1156.3	1256.6
K-factor	32	32	32	36
Floor	1002.7	922.5	1055.7	700
Max/Min rating change allowed	107.9	120.8	104.6	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	1501.8	1422.5	1523.1	1200
New weighted rating	1499.7	1419	1521.2	1200
New weighted performance	1184.7	1147.6	1247.7	0
Temp new rating	1501.8	1422.5	1523.1	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1501.8	1422.5	1523.1	1200
New K-factor	32	32	32	36
New floor	1002.7	922.5	1055.7	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	37	17	20
	28	11	17
	5	0	5
	0	0	0
History	86	38	48

Games since
	Main 43	Standard 17		Rapid 26		Blitz 0
Gender	Female
Age group	U16
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	1256		395		49
Female	162		59		10
U16	154		48		11
U16 Female	33		10		3
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	187		88		14
Female	7		6		2
U16	24		15		2
U16 Female	2		2		1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 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	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	86	61	70.93	177.9	1289.2	1467.1
Standard	38	24.5	64.47	123	1310.8	1433.9
Rapid	48	36.5	76.04	221.4	1272	1493.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1501.8	1422.5	1523.1	1200
2025-09-30	1501.8	1422.5	1523.1	1200
2025-09-01	1501.8	1422.5	1523.1	1200
2025-08-01	1501.8	1422.5	1523.1	1200
2025-07-01	1501.8	1422.5	1523.1	1200
2025-06-01	1501.8	1422.5	1523.1	1200
2025-05-01	1501.8	1422.5	1523.1	1200
2025-04-01	1501.8	1422.5	1523.1	1200
2025-03-01	1501.8	1422.5	1523.1	1200
2025-02-01	1501.8	1422.5	1523.1	1200
2025-01-01	1501.8	1422.5	1523.1	1200
2024-12-01	1501.8	1422.5	1523.1	1200
2024-11-01	1501.8	1422.5	1523.1	1200
2024-10-01	1501.8	1422.5	1523.1	1200
2024-09-01	1501.8	1422.5	1523.1	1200
2024-08-01	1498.5	1422.5	1515.7	1200
2024-07-01	1498.5	1422.5	1515.7	1200
2024-09-01	1498.5	1422.5	1515.7	1200
2024-05-01	1502.7	1382.9	1555.7	1200
2024-04-01	1485.9	1382.9	1491	1200
2024-03-01	1446.9	1319.5	1491	1200
2024-02-01	1388.5	1290.7	1402.7	1200
2024-01-01	1388.5	1290.7	1402.7	1200
2023-12-01	1388.5	1290.7	1402.7	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	Stellenbosch Primary 2024 (U13)	2024-08-17	2024-08-17	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
2	Cape Town Junior League Finals 2024 (U13 Open A)	2024-05-18	2024-05-18	Rapid	Cape Town (WCT)	5	5	2	Yes	Analysis
3	Western Cape PS Individuals Championship 2024 (U13 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
4	Cape Town Junior League Qualifier 2024 (U13 Open)	2024-04-06	2024-04-06	Rapid	Cape Town (WCT)	6	5	5	Yes	Analysis
5	Cape Town Metro Schools Chess Closed Individuals 2024 (U13 Boys)	2024-03-02	2024-03-03	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
6	Mary-Anne Bartels Closed Chess Tournament 2024 (U13 Mixed)	2024-02-24	2024-02-24	Rapid	Cape Town (WCT)	5	5	5	Yes	Analysis
7	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
8	Grant East Primary School Invitational Chess Tournament 2023 (U13 Mixed)	2023-11-04	2023-11-04	Rapid	Cape Town (WCT)	6	6	5	Yes	Analysis
9	Stellenbosch Primary Chess Tournament 2023 (U14)	2023-08-19	2023-08-19	Rapid	Cape Winelands (WCW)	6	6	5	Yes	Analysis
10	Cape Town Metro Schools Chess Closed Individuals 2023 (U13 Boys)	2023-02-03	2023-03-04	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
11	Mary-Anne Bartels Chess Tournament 2023 (U13)	2023-02-21	2023-02-21	Rapid	Cape Town (WCT)	5	5	3.5	Yes	Analysis
12	District East Schools Chess Individual Trials 2023 (U13 Boys)	2023-02-03	2023-02-04	Standard	Cape Town (WCT)	6	5	4	Yes	Analysis
13	Metro Rapid 2022 (U11 Boys)	2022-10-22	2022-10-22	Rapid	Cape Town (WCT)	5	5	3	Yes	Analysis
14	2020 Metro Trials (U9 Boys)	2020-03-13	2020-03-14	Standard	Cape Town (WCT)	5	5	2.5	Yes	Analysis
15	2020 East District Individuals (U9)	2020-01-31	2020-02-01	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
16	Rhenish Primary Chess Tournament 2019 (U10)	2019-05-11	2019-05-11	Rapid	Cape Winelands (WCW)	7	6	4	Yes	Analysis

#	Games	Start				End
1	10	Tournament Mary-Anne Bartels Closed Chess Tournament 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-02-24	rnd 1	type Rapid	result 1	date 2024-03-03	rnd 5	type Standard	result 1
		Opponent Amoraal, B (Benyamin)				Opponent Muller, H (Helgard)
2	7	Tournament Cape Town Junior League Qualifier 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-04-06	rnd 1	type Rapid	result 1	date 2024-05-04	rnd 2	type Standard	result 1
		Opponent Tesselaar, M (Mc)				Opponent Schultz, O (Oliver)
3	6	Tournament Grant East Primary School Invitational Chess Tournament 2023				Tournament CT District East Schools Chess Individuals Trails 2024
		date 2023-11-04	rnd 5	type Rapid	result 1	date 2024-02-03	rnd 4	type Standard	result 1
		Opponent Abrahams, C (Chello)				Opponent Van Der Westhuizen, W (Werner)

#	Games	Start				End
1	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2023				Tournament CT District East Schools Chess Individuals Trails 2024
		date 2023-03-04	rnd 5	type Standard	result 1	date 2024-02-03	rnd 4	type Standard	result 1
		Opponent Pickford, L (Luke)				Opponent Van Der Westhuizen, W (Werner)
2	5	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-03-02	rnd 1	type Standard	result 0.5	date 2024-03-03	rnd 5	type Standard	result 1
		Opponent Claassen, U (Uthan)				Opponent Muller, H (Helgard)
3	3	Tournament District East Schools Chess Individual Trials 2023				Tournament District East Schools Chess Individual Trials 2023
		date 2023-02-04	rnd 4	type Standard	result 1	date 2023-02-04	rnd 6	type Standard	result 1
		Opponent Mangele, O (Oyama)				Opponent Jacob, L (Lyvette)

#	Games	Start				End
1	12	Tournament Grant East Primary School Invitational Chess Tournament 2023				Tournament Cape Town Junior League Qualifier 2024
		date 2023-11-04	rnd 5	type Rapid	result 1	date 2024-04-06	rnd 6	type Rapid	result 1
		Opponent Abrahams, C (Chello)				Opponent James, A (Ayden)
2	6	Tournament Stellenbosch Primary Chess Tournament 2023				Tournament Grant East Primary School Invitational Chess Tournament 2023
		date 2023-08-19	rnd 4	type Rapid	result 1	date 2023-11-04	rnd 3	type Rapid	result 1
		Opponent Williams, S (Samuel)				Opponent Rule, C (Calem)
3	3	Tournament Mary-Anne Bartels Chess Tournament 2023				Tournament Stellenbosch Primary Chess Tournament 2023
		date 2023-02-21	rnd 5	type Rapid	result 0.5	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Van Wyk, C (Cayllum)				Opponent Johnston, Z (Zach)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament Cape Town Junior League Qualifier 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-04-06	rnd 1	type Rapid	result 1	date 2024-05-04	rnd 2	type Standard	result 1
		Opponent Tesselaar, M (Mc)				Opponent Schultz, O (Oliver)
2	6	Tournament Grant East Primary School Invitational Chess Tournament 2023				Tournament CT District East Schools Chess Individuals Trails 2024
		date 2023-11-04	rnd 5	type Rapid	result 1	date 2024-02-03	rnd 4	type Standard	result 1
		Opponent Abrahams, C (Chello)				Opponent Van Der Westhuizen, W (Werner)
3	6	Tournament Stellenbosch Primary Chess Tournament 2023				Tournament Grant East Primary School Invitational Chess Tournament 2023
		date 2023-08-19	rnd 4	type Rapid	result 1	date 2023-11-04	rnd 3	type Rapid	result 1
		Opponent Williams, S (Samuel)				Opponent Rule, C (Calem)

#	Games	Start				End
1	6	Tournament Cape Town Metro Schools Chess Closed Individuals 2023				Tournament CT District East Schools Chess Individuals Trails 2024
		date 2023-03-04	rnd 5	type Standard	result 1	date 2024-02-03	rnd 4	type Standard	result 1
		Opponent Pickford, L (Luke)				Opponent Van Der Westhuizen, W (Werner)
2	3	Tournament District East Schools Chess Individual Trials 2023				Tournament District East Schools Chess Individual Trials 2023
		date 2023-02-04	rnd 4	type Standard	result 1	date 2023-02-04	rnd 6	type Standard	result 1
		Opponent Mangele, O (Oyama)				Opponent Jacob, L (Lyvette)
3	3	Tournament 2020 East District Individuals				Tournament 2020 Metro Trials
		date 2020-02-01	rnd 4	type Standard	result 1	date 2020-03-13	rnd 1	type Standard	result 1
		Opponent Potgieter, L (Lian)				Opponent Dunbar, A (Aaron)

#	Games	Start				End
1	12	Tournament Grant East Primary School Invitational Chess Tournament 2023				Tournament Cape Town Junior League Qualifier 2024
		date 2023-11-04	rnd 5	type Rapid	result 1	date 2024-04-06	rnd 6	type Rapid	result 1
		Opponent Abrahams, C (Chello)				Opponent James, A (Ayden)
2	6	Tournament Stellenbosch Primary Chess Tournament 2023				Tournament Grant East Primary School Invitational Chess Tournament 2023
		date 2023-08-19	rnd 4	type Rapid	result 1	date 2023-11-04	rnd 3	type Rapid	result 1
		Opponent Williams, S (Samuel)				Opponent Rule, C (Calem)
3	3	Tournament Mary-Anne Bartels Chess Tournament 2023				Tournament Mary-Anne Bartels Chess Tournament 2023
		date 2023-02-21	rnd 1	type Rapid	result 1	date 2023-02-21	rnd 3	type Rapid	result 1
		Opponent Nakani, M (Milani)				Opponent Voges, Z (Zachary)

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	Braaf ,J (Jordan)	3	2	141.7	2	2	425	1	0	-425	0	0	0
1	Braaf ,J (Jordan)	3	1429.2	1570.9	2	1445.9	1854.2	1	1377.4	1004.2	0	0	0
2	Smith ,Z (Zion)	3	1	-141.7	1	1	425	2	0	-425	0	0	0
2	Smith ,Z (Zion)	3	1597.6	1456	1	1587.6	2022.6	2	1543.2	1172.6	0	0	0
3	Adolf ,F (Feraydo)	3	2	141.7	0	0	0	3	2	141.7	0	0	0
3	Adolf ,F (Feraydo)	3	1290.4	1432.1	0	0	0	3	1308.6	1432.1	0	0	0
4	Muller ,H (Helgard)	2	1	0	2	1	0	0	0	0	0	0	0
4	Muller ,H (Helgard)	2	1437.4	1437.4	2	1392.8	1437.4	0	0	0	0	0	0
5	Priestley ,L (Liam)	2	1	0	2	1	0	0	0	0	0	0	0
5	Priestley ,L (Liam)	2	1402.7	1402.7	2	1384.3	1402.7	0	0	0	0	0	0
6	Rall ,L (Lian)	2	2	425	0	0	0	2	2	425	0	0	0
6	Rall ,L (Lian)	2	1428.9	1853.9	0	0	0	2	1457.5	1853.9	0	0	0
7	Brakhoff ,F (Ferris)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Brakhoff ,F (Ferris)	1	1219.9	794.9	1	1207.2	794.9	0	0	0	0	0	0
8	Mangele ,O (Oyama)	1	1	425	1	1	425	0	0	0	0	0	0
8	Mangele ,O (Oyama)	1	1189.9	1614.9	1	1200	1614.9	0	0	0	0	0	0
9	Potgieter ,L (Lian)	1	1	425	1	1	425	0	0	0	0	0	0
9	Potgieter ,L (Lian)	1	1166.4	1591.4	1	1200	1591.4	0	0	0	0	0	0
10	Claassen ,U (Uthan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
10	Claassen ,U (Uthan)	1	1303.8	1303.8	1	1289.6	1303.8	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

Yoon, YJ (Yea Jun)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms