Chess South Africa Ratings Database

PLAYER PAGE

Personal

Viljoen, J (Joha)

Chess SA id

1120316249

FIDE id

Date of birth

2012-09-02 (U14)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1223	1199.9	1233.9	1200
Raw rating	1223	1199.9	1233.9	1200
Weighted rating	1203.5	1199.9	1205.3	1200
Weighted performance	0	0	0	0
Floor	723	699.9	733.9	700
K-factor	36	40	36	36
Min/Max rating change allowed	160.5	165.8	158	165.8
Highest rating	1223 2025-09-01	1199.9 2025-02-24	1233.9 2025-09-01	1200 2025-03-01
Highest raw rating	1223 2025-09-01	1199.9 2025-02-24	1233.9 2025-09-01	1200 2025-03-01
Highest weighted rating	1201.7 2025-09-01	1199.9 2025-02-24	1202.7 2025-09-01	1200 2025-03-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1223	1199.9	1233.9	1200
Analysis
Rating	1223	1199.9	1233.9	1200
Raw rating	1223	1199.9	1233.9	1200
Weighted rating	1203.5	1199.9	1205.3
Weighted performance	0	0	0
K-factor	36	40	36	36
Floor	723	699.9	733.9	700
Max/Min rating change allowed	160.5	165.8	158	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	1223	1199.9	1233.9	1200
New weighted rating	1205.2	1199.9	1207.8	1200
New weighted performance	0	0	0	0
Temp new rating	1223	1199.9	1233.9	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1223	1199.9	1233.9	1200
New K-factor	36	40	36	36
New floor	723	699.9	733.9	700

Item	Main	Standard	Rapid
	0	0	0
	10	5	5
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	10	5	5

Games since
	Main 10	Standard 5		Rapid 5		Blitz 0
Gender	Male
Age group	U14
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	10	5	50	0	1243.3	1243.3
Standard	5	2	40	-85	1215.4	1130.4
Rapid	5	3	60	85	1271.2	1356.2
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	10	5	50	0	1243.3	1243.3
Standard	5	2	40	-85	1215.4	1130.4
Rapid	5	3	60	85	1271.2	1356.2
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1223	1199.9	1233.9	1200
2025-09-01	1223	1199.9	1233.9	1200
2025-08-01	1199.9	1199.9	1200	1200
2025-07-01	1199.9	1199.9	1200	1200
2025-06-01	1199.9	1199.9	1200	1200
2025-05-01	1199.9	1199.9	1200	1200
2025-04-01	1199.8	1199.8	1200	1200
2025-03-01	1199	1198.6	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	Stellenbosch Primary 2025 (U13)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
2	Cape Winelands Schools - Trials 1 2025 (U13 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Stellenbosch Primary 2025 (U13)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
2	Cape Winelands Schools - Trials 1 2025 (U13 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis

#	Games	Start				End
1	2	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 2	type Rapid	result 1	date 2025-08-16	rnd 3	type Rapid	result 1
		Opponent Mahlikihla, A (Akho)				Opponent Calvert, C (Caylim)
2	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Wildschutt, L (Leogan)				Opponent Neethling, C (Christiaan)
3	1	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 5	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Sinclair, A (Albert)				Opponent Sinclair, A (Albert)

#	Games	Start				End
1	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Wildschutt, L (Leogan)				Opponent Neethling, C (Christiaan)

#	Games	Start				End
1	2	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 2	type Rapid	result 1	date 2025-08-16	rnd 3	type Rapid	result 1
		Opponent Mahlikihla, A (Akho)				Opponent Calvert, C (Caylim)
2	1	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 5	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Sinclair, A (Albert)				Opponent Sinclair, A (Albert)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 2	type Rapid	result 1	date 2025-08-16	rnd 3	type Rapid	result 1
		Opponent Mahlikihla, A (Akho)				Opponent Calvert, C (Caylim)
2	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Wildschutt, L (Leogan)				Opponent Neethling, C (Christiaan)
3	1	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 5	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Sinclair, A (Albert)				Opponent Sinclair, A (Albert)

#	Games	Start				End
1	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Wildschutt, L (Leogan)				Opponent Neethling, C (Christiaan)

#	Games	Start				End
1	2	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 2	type Rapid	result 1	date 2025-08-16	rnd 3	type Rapid	result 1
		Opponent Mahlikihla, A (Akho)				Opponent Calvert, C (Caylim)
2	1	Tournament Stellenbosch Primary 2025				Tournament Stellenbosch Primary 2025
		date 2025-08-16	rnd 5	type Rapid	result 1	date 2025-08-16	rnd 5	type Rapid	result 1
		Opponent Sinclair, A (Albert)				Opponent Sinclair, A (Albert)

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	Le Fleur ,C (Caydene)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Le Fleur ,C (Caydene)	1	1199.3	774.3	1	1207.9	774.3	0	0	0	0	0	0
2	Fortuin ,H (Haywill)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Fortuin ,H (Haywill)	1	1315.7	890.7	1	1234.6	890.7	0	0	0	0	0	0
3	Neethling ,C (Christiaan)	1	1	425	1	1	425	0	0	0	0	0	0
3	Neethling ,C (Christiaan)	1	1224.7	1649.7	1	1186.9	1649.7	0	0	0	0	0	0
4	Wildschutt ,L (Leogan)	1	1	425	1	1	425	0	0	0	0	0	0
4	Wildschutt ,L (Leogan)	1	1164.5	1589.5	1	1200	1589.5	0	0	0	0	0	0
5	Wareley ,C (Caleb)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Wareley ,C (Caleb)	1	1173	748	1	1200	748	0	0	0	0	0	0
6	Kuypers ,P (Parker)	1	0	-425	0	0	0	1	0	-425	0	0	0
6	Kuypers ,P (Parker)	1	1498.4	1073.4	0	0	0	1	1475.3	1073.4	0	0	0
7	Calvert ,C (Caylim)	1	1	425	0	0	0	1	1	425	0	0	0
7	Calvert ,C (Caylim)	1	1217.7	1642.7	0	0	0	1	1236	1642.7	0	0	0
8	Sinclair ,A (Albert)	1	1	425	0	0	0	1	1	425	0	0	0
8	Sinclair ,A (Albert)	1	1225.9	1650.9	0	0	0	1	1242	1650.9	0	0	0
9	Makone ,E (Ethan)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Makone ,E (Ethan)	1	1213.7	788.7	0	0	0	1	1189.6	788.7	0	0	0
10	Mahlikihla ,A (Akho)	1	1	425	0	0	0	1	1	425	0	0	0
10	Mahlikihla ,A (Akho)	1	1200	1625	0	0	0	1	1200	1625	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Viljoen, J (Joha)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms