Chess South Africa Ratings Database

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Personal

Kotze, J (Johann)

Chess SA id

1070156957

FIDE id

Date of birth

2007-11-04 (U20)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-23

Personal details last changed

1900-01-01

Junior GPX Games

31.7

Junior GPX Points

1283.3

Item	Main	Standard	Rapid	Blitz
Rating	1342	1324.6	1216.8	1200
Raw rating	1342	1324.6	1216.8	1200
Weighted rating	1303.7	1299.6	1196.5	1200
Weighted performance	1249.4	1247.1	0	0
Floor	864.8	849.9	716.8	700
K-factor	36	36	36	36
Min/Max rating change allowed	135.4	138.8	161.9	165.8
Highest rating	1364.8 2025-05-05	1349.9 2025-05-05	1216.8 2025-09-01	1200 2018-10-01
Highest raw rating	1364.8 2025-05-05	1349.9 2025-05-05	1216.8 2025-09-01	1200 2024-02-01
Highest weighted rating	1290.6 2025-09-01	1285 2025-08-01	1207.5 2018-10-01	1200 2018-10-01
Highest weighted performance	1363.3 2025-05-05	1349.9 2023-07-01	1200 2019-12-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1342	1324.6	1216.8	1200
Analysis
Rating	1342	1324.6	1216.8	1200
Raw rating	1342	1324.6	1216.8	1200
Weighted rating	1303.7	1299.6	1196.5
Weighted performance	1249.4	1247.1	0
K-factor	36	36	36	36
Floor	864.8	849.9	716.8	700
Max/Min rating change allowed	135.4	138.8	161.9	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	1342	1324.6	1216.8	1200
New weighted rating	1309.5	1303.7	1198.9	1200
New weighted performance	1241.8	1239.3	0	0
Temp new rating	1342	1324.6	1216.8	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1342	1324.6	1216.8	1200
New K-factor	36	36	36	36
New floor	864.8	849.9	716.8	700

Item	Main	Standard	Rapid
	0	0	0
	33	22	11
	21	9	12
	15	11	4
	0	0	0
	0	0	0
History	69	42	27

Games since
	Main 54	Standard 31		Rapid 23		Blitz 0
Gender	Male
Age group	U20
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	2816		904		129
Male	2249		690		95
U20	210		76		17
U20 Male	164		64		14
Standard
	RSA		Province		Region
Overall	2939		839		114
Male	2339		627		81
U20	226		77		16
U20 Male	175		65		14
Rapid
	RSA		Province		Region
Overall	1547		756		127
Male	1200		575		91
U20	86		49		6
U20 Male	71		43		6
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	33	18	54.55	38.6	1309.6	1348.3
Standard	22	12.5	56.82	58	1299	1356.9
Rapid	11	5.5	50	0	1331	1331
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	69	36.5	52.9	24.6	1276.7	1301.3
Standard	42	25	59.52	81	1262.1	1343
Rapid	27	11.5	42.59	-63	1299.3	1236.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1342	1324.6	1216.8	1200
2025-09-30	1342	1324.6	1216.8	1200
2025-09-01	1342	1324.6	1216.8	1200
2025-08-01	1340.6	1324.6	1207.5	1200
2025-07-01	1364.8	1349.9	1207.5	1200
2025-06-01	1364.8	1349.9	1207.5	1200
2025-05-01	1364.8	1349.9	1207.5	1200
2025-04-01	1360.2	1334.6	1207.5	1200
2025-03-01	1363.3	1321	1207.5	1200
2025-02-01	1281.7	1295.8	1180.9	1200
2025-01-01	1281.7	1295.8	1180.9	1200
2024-12-01	1231.3	1251.2	1180.9	1200
2024-11-01	1231.3	1251.2	1180.9	1200
2024-10-01	1231.3	1251.2	1180.9	1200
2024-09-01	1231.3	1251.2	1180.9	1200
2024-08-01	1203.8	1216.6	1180.9	1200
2024-07-01	1191.9	1216.6	1157.9	1200
2024-09-01	1191.9	1216.6	1157.9	1200
2024-05-01	1191.9	1216.6	1157.9	1200
2024-04-01	1191.9	1216.6	1157.9	1200
2024-03-01	1191.9	1216.6	1157.9	1200
2024-02-01	1204.7	1216.6	1168.7	1200
2024-01-01	1204.7	1216.6	1168.7	1200
2023-12-01	1204.7	1216.6	1168.7	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	Cape Winelands Top Schools 2025 (U17+U19)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
2	Cape Winelands Open 2025 (Intermediate)	2025-07-19	2025-07-20	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
3	Western Cape Schools Individual Championship 2025 (U19 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
4	Cape Winelands Schools Prestige 2025 (U19 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
5	Cape Winelands Schools - Trials 1 2025 (U19 Boys)	2025-02-08	2025-02-08	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
6	Overberg Schools & Federation Open 2025 (Open)	2025-02-01	2025-02-01	Rapid	Overberg (WOS)	6	6	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Cape Winelands Top Schools 2025 (U17+U19)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
2	Cape Winelands Open 2025 (Intermediate)	2025-07-19	2025-07-20	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
3	Western Cape Schools Individual Championship 2025 (U19 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
4	Cape Winelands Schools Prestige 2025 (U19 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
5	Cape Winelands Schools - Trials 1 2025 (U19 Boys)	2025-02-08	2025-02-08	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
6	Overberg Schools & Federation Open 2025 (Open)	2025-02-01	2025-02-01	Rapid	Overberg (WOS)	6	6	3	Yes	Analysis
7	2nd Strategize To Win Round-Robin Tournament ACL 2024 (H)	2024-12-07	2024-12-07	Standard	Cape Town (WCT)	5	4	3.5	Yes	Analysis
8	Western Cape Women�s Championship 2024 (Intermediate)	2024-08-10	2024-08-10	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
9	Curro Durbanville Chess Rapid Open 2024 (Intermediate)	2024-07-13	2024-07-13	Rapid	Cape Town (WCT)	6	6	2.5	Yes	Analysis
10	Cape Winelands Schools - HS Trials 1 2024 (U18 Boys)	2024-02-17	2024-02-17	Rapid	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis
11	Paarl Gimnasium Championship 2023 (A)	2023-10-24	2023-10-30	Rapid	Cape Winelands (WCW)	9	4	1	Yes	Analysis
12	Cape Winelands Open 2023 (Intermediate)	2023-07-22	2023-07-23	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
13	Strategema 2023 (U15-U19)	2023-05-13	2023-05-13	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament Western Cape Women�s Championship 2024				Tournament 2nd Strategize To Win Round-Robin Tournament ACL 2024
		date 2024-08-10	rnd 4	type Standard	result 1	date 2024-12-07	rnd 5	type Standard	result 0.5
		Opponent Nel, L (Luzelle)				Opponent Yao, Y (Yizheng)
2	4	Tournament Western Cape Schools Individual Championship 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-04-26	rnd 3	type Standard	result 0.5	date 2025-04-27	rnd 6	type Standard	result 1
		Opponent Sadan, D (Dayaan)				Opponent Gal, C (Curtis)
3	3	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-20	rnd 5	type Standard	result 1
		Opponent Alkaster, K (Keehourn)				Opponent Strauss, Z (Zoe)

#	Games	Start				End
1	8	Tournament Western Cape Women�s Championship 2024				Tournament Cape Winelands Schools - Trials 1 2025
		date 2024-08-10	rnd 4	type Standard	result 1	date 2025-02-08	rnd 2	type Standard	result 0.5
		Opponent Nel, L (Luzelle)				Opponent Hjelden, E (Einwald)
2	4	Tournament Western Cape Schools Individual Championship 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-04-26	rnd 3	type Standard	result 0.5	date 2025-04-27	rnd 6	type Standard	result 1
		Opponent Sadan, D (Dayaan)				Opponent Gal, C (Curtis)
3	3	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-20	rnd 5	type Standard	result 1
		Opponent Alkaster, K (Keehourn)				Opponent Strauss, Z (Zoe)

#	Games	Start				End
1	3	Tournament Curro Durbanville Chess Rapid Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-07-13	rnd 4	type Rapid	result 0.5	date 2024-07-13	rnd 6	type Rapid	result 1
		Opponent Mboyisa, A (Ayanda)				Opponent Wilson, EM (Emlyn)
2	2	Tournament Cape Winelands Top Schools 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-23	rnd 4	type Rapid	result 0.5	date 2025-08-23	rnd 5	type Rapid	result 1
		Opponent Odell, E (Eugene)				Opponent Williams, D (Danole)
3	2	Tournament Overberg Schools & Federation Open 2025				Tournament Overberg Schools & Federation Open 2025
		date 2025-02-01	rnd 3	type Rapid	result 1	date 2025-02-01	rnd 4	type Rapid	result 1
		Opponent Du Plessis, M (Matthys Armand)				Opponent Matha, J (Jessica)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Western Cape Women�s Championship 2024				Tournament 2nd Strategize To Win Round-Robin Tournament ACL 2024
		date 2024-08-10	rnd 4	type Standard	result 1	date 2024-12-07	rnd 4	type Standard	result 1
		Opponent Nel, L (Luzelle)				Opponent Kotliar, B (Beatrisa)
2	3	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-20	rnd 5	type Standard	result 1
		Opponent Alkaster, K (Keehourn)				Opponent Strauss, Z (Zoe)
3	3	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Mootsi, S (Seemo)				Opponent Gordon, D (Deuwin)

#	Games	Start				End
1	5	Tournament Western Cape Women�s Championship 2024				Tournament 2nd Strategize To Win Round-Robin Tournament ACL 2024
		date 2024-08-10	rnd 4	type Standard	result 1	date 2024-12-07	rnd 4	type Standard	result 1
		Opponent Nel, L (Luzelle)				Opponent Kotliar, B (Beatrisa)
2	3	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 3	type Standard	result 1	date 2025-07-20	rnd 5	type Standard	result 1
		Opponent Alkaster, K (Keehourn)				Opponent Strauss, Z (Zoe)
3	3	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Mootsi, S (Seemo)				Opponent Gordon, D (Deuwin)

#	Games	Start				End
1	2	Tournament Overberg Schools & Federation Open 2025				Tournament Overberg Schools & Federation Open 2025
		date 2025-02-01	rnd 3	type Rapid	result 1	date 2025-02-01	rnd 4	type Rapid	result 1
		Opponent Du Plessis, M (Matthys Armand)				Opponent Matha, J (Jessica)
2	2	Tournament Curro Durbanville Chess Rapid Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-07-13	rnd 5	type Rapid	result 1	date 2024-07-13	rnd 6	type Rapid	result 1
		Opponent Kirthan, V (Venya)				Opponent Wilson, EM (Emlyn)
3	1	Tournament Cape Winelands Top Schools 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-23	rnd 5	type Rapid	result 1	date 2025-08-23	rnd 5	type Rapid	result 1
		Opponent Williams, D (Danole)				Opponent Williams, D (Danole)

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	Calitz ,J (Joey)	2	1	0	2	1	0	0	0	0	0	0	0
1	Calitz ,J (Joey)	2	1333.6	1333.6	2	1343.9	1333.6	0	0	0	0	0	0
2	Strauss ,Z (Zoe)	2	1	0	2	1	0	0	0	0	0	0	0
2	Strauss ,Z (Zoe)	2	1267.7	1267.7	2	1274.2	1267.7	0	0	0	0	0	0
3	Potgieter ,W (Werne)	2	0	-425	0	0	0	2	0	-425	0	0	0
3	Potgieter ,W (Werne)	2	1663.3	1238.3	0	0	0	2	1569.4	1238.3	0	0	0
4	Appels ,C (Charlton-John)	1	1	425	1	1	425	0	0	0	0	0	0
4	Appels ,C (Charlton-John)	1	1209.4	1634.4	1	1170	1634.4	0	0	0	0	0	0
5	Van Der Westhuizen ,D (Dawid)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Van Der Westhuizen ,D (Dawid)	1	1233.8	808.8	1	1215.6	808.8	0	0	0	0	0	0
6	Gordon ,D (Deuwin)	1	1	425	1	1	425	0	0	0	0	0	0
6	Gordon ,D (Deuwin)	1	1094.9	1519.9	1	1115.2	1519.9	0	0	0	0	0	0
7	Strauss ,B (Branden)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Strauss ,B (Branden)	1	1296.9	871.9	1	1248.4	871.9	0	0	0	0	0	0
8	Bukani ,H (Howard-Lee)	1	1	425	1	1	425	0	0	0	0	0	0
8	Bukani ,H (Howard-Lee)	1	1145.7	1570.7	1	1145.6	1570.7	0	0	0	0	0	0
9	Klopper ,B (Ben)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Klopper ,B (Ben)	1	1533.9	1108.9	1	1555.3	1108.9	0	0	0	0	0	0
10	Gal ,C (Curtis)	1	1	425	1	1	425	0	0	0	0	0	0
10	Gal ,C (Curtis)	1	1210.8	1635.8	1	1174.9	1635.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Kotze, J (Johann)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms