Chess South Africa Ratings Database

PLAYER PAGE

Personal

Pretorius, JB (Johnny Barend)

Chess SA id

107057155

FIDE id

Date of birth

2007-02-14 (U20)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2021-05-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1258.9	1226.4	1031.2	618
Raw rating	1258.9	1226.4	1031.2	618
Weighted rating	1258.9	1226.4	1031.2	618
Weighted performance	484.1	314.9	0	0
Floor	758.9	726.4	531.2	500
K-factor	36	36	40	40
Min/Max rating change allowed	152.5	159.7	210.9	380
Highest rating	1300 2018-03-01	1295.8 2018-03-01	1277.3 2019-02-01	1200 2024-02-01
Highest raw rating	1258.9 2024-02-01	1226.4 2024-02-01	1031.2 2024-02-01	618 2024-02-01
Highest weighted rating	1258.9 2024-02-01	1226.4 2025-02-01	1031.2 2024-11-01	618 2024-11-01
Highest weighted performance	1300 2018-03-01	1295.8 2018-03-01	1277.3 2019-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1258.9	1226.4	1031.2	618
Analysis
Rating	1258.9	1226.4	1031.2	618
Raw rating	1258.9	1226.4	1031.2	618
Weighted rating	1258.9	1226.4	1031.2
Weighted performance	484.1	314.9	0
K-factor	36	36	40	40
Floor	758.9	726.4	531.2	500
Max/Min rating change allowed	152.5	159.7	210.9	380
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	1258.9	1226.4	1031.2	618
New weighted rating	1258.9	1226.4	1031.2	618
New weighted performance	483.7	314.5	0	0
Temp new rating	1258.9	1226.4	1031.2	618
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1258.9	1226.4	1031.2	618
New K-factor	36	36	40	40
New floor	758.9	726.4	531.2	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	12	0	12
History	111	83	28

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U20
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
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	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	74	40.5	54.73	40.2	1189.8	1230
Standard	51	27	52.94	25	1185.1	1210.1
Rapid	23	13.5	58.7	73.9	1200	1273.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1258.9	1226.4	1031.2	618
2025-09-01	1258.9	1226.4	1031.2	618
2025-08-01	1258.9	1226.4	1031.2	618
2025-07-01	1258.9	1226.4	1031.2	618
2025-06-01	1258.9	1226.4	1031.2	618
2025-05-01	1258.9	1226.4	1031.2	618
2025-04-01	1258.9	1226.4	1031.2	618
2025-03-01	1258.9	1226.4	1031.2	618
2025-02-01	1258.9	1226.4	1031.2	618
2025-01-01	1258.9	1226.4	1031.2	618
2024-12-01	1258.9	1226.4	1031.2	618
2024-11-01	1258.9	1226.4	1031.2	618
2024-10-01	1258.9	1226.4	1031.2	618
2024-09-01	1258.9	1226.4	1031.2	618
2024-08-01	1258.9	1226.4	1031.2	618
2024-07-01	1258.9	1226.4	1031.2	618
2024-06-01	1258.9	1226.4	1031.2	618
2024-08-01	1258.9	1226.4	1031.2	618
2024-04-01	1258.9	1226.4	1031.2	618
2024-03-01	1258.9	1226.4	1031.2	618
2024-02-01	1258.9	1226.4	1031.2	618
2024-01-01	1258.9	1226.4	1031.2	618
2023-12-01	1258.9	1226.4	1031.2	618
2023-11-01	1258.9	1226.4	1031.2	618

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	Bo-Weskus Skole Skaak Prestige 2021 (O15 Seuns)	2021-05-08	2021-05-08	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
2	Olifantsrivier CC 2021 (Invitational)	2021-03-27	2021-03-27	Rapid	West Coast (WCU)	7	7	3	Yes	Analysis
3	West Coast Schools Prestige 2020 (U13 Boys)	2020-03-07	2020-03-07	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
4	Bo-Weskus Skole Prestige 2020 (O13 Seuns)	2020-02-15	2020-02-15	Standard	West Coast (WCU)	6	6	5	Yes	Analysis
5	Western Cape Top Schools 2019 (U13 Mix)	2019-08-31	2019-09-01	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
6	Check Mates 2019 (Open)	2019-08-17	2019-08-17	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
7	Waschklip Clinic Closed 2019	2019-06-18	2019-06-18	Standard	West Coast (WCU)	5	5	1	Yes	Analysis
8	Western Cape Schools Individuals 2019 (U13 Boys)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	2	Yes	Analysis
9	West Coast Open 2019 (C)	2019-04-27	2019-04-27	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
10	Weskus Skole Prestige Skaak Kampioenskappe 2019 (O13 Seuns)	2019-03-02	2019-04-06	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
11	Bo-Weskus Skole Skaak Prestige 2019 (O13 Seuns)	2019-02-16	2019-02-16	Rapid	West Coast (WCU)	7	6	3.5	Yes	Analysis
12	Western Cape Schools Individuals 2018 (U11 Boys)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	6	2	Yes	Analysis
13	West Coast Schools Prestige Individual Championship 2018 (U11 Boys)	2018-03-10	2018-03-24	Standard	West Coast (WCU)	6	6	4	Yes	Analysis

#	Games	Start				End
1	6	Tournament Bo-Weskus Skole Prestige 2020				Tournament West Coast Schools Prestige 2020
		date 2020-02-15	rnd 3	type Standard	result 1	date 2020-03-07	rnd 2	type Rapid	result 1
		Opponent Massent, K (Keithan)				Opponent Cloete, A (Alesundro)
2	5	Tournament Weskus Skole Prestige Skaak Kampioenskappe 2019				Tournament West Coast Open 2019
		date 2019-04-06	rnd 6	type Standard	result 1	date 2019-04-27	rnd 4	type Standard	result 1
		Opponent Muller, J (Jayden)				Opponent Mattheus, E (Elcay)
3	4	Tournament Bo-Weskus Skole Skaak Prestige 2021				Tournament Bo-Weskus Skole Skaak Prestige 2021
		date 2021-05-08	rnd 1	type Rapid	result 1	date 2021-05-08	rnd 4	type Rapid	result 1
		Opponent Andrew, K (Keenan)				Opponent Cloete, H (Howard)

#	Games	Start				End
1	5	Tournament Weskus Skole Prestige Skaak Kampioenskappe 2019				Tournament West Coast Open 2019
		date 2019-04-06	rnd 6	type Standard	result 1	date 2019-04-27	rnd 4	type Standard	result 1
		Opponent Muller, J (Jayden)				Opponent Mattheus, E (Elcay)
2	4	Tournament Bo-Weskus Skole Prestige 2020				Tournament Bo-Weskus Skole Prestige 2020
		date 2020-02-15	rnd 3	type Standard	result 1	date 2020-02-15	rnd 6	type Standard	result 1
		Opponent Massent, K (Keithan)				Opponent Joseph, R (Riaan)
3	2	Tournament Western Cape Top Schools 2019				Tournament Bo-Weskus Skole Prestige 2020
		date 2019-09-01	rnd 5	type Standard	result 1	date 2020-02-15	rnd 1	type Standard	result 1
		Opponent Smit, V (Van Rooy)				Opponent Engelbrecht, R (Ryan)

#	Games	Start				End
1	4	Tournament Bo-Weskus Skole Skaak Prestige 2021				Tournament Bo-Weskus Skole Skaak Prestige 2021
		date 2021-05-08	rnd 1	type Rapid	result 1	date 2021-05-08	rnd 4	type Rapid	result 1
		Opponent Andrew, K (Keenan)				Opponent Cloete, H (Howard)
2	4	Tournament Bo-Weskus Skole Skaak Prestige 2019				Tournament Bo-Weskus Skole Skaak Prestige 2019
		date 2019-02-16	rnd 2	type Rapid	result 1	date 2019-02-16	rnd 5	type Rapid	result 1
		Opponent Lesch, N (Nico)				Opponent Claassens, J (John)
3	2	Tournament Olifantsrivier CC 2021				Tournament Olifantsrivier CC 2021
		date 2021-03-27	rnd 2	type Rapid	result 1	date 2021-03-27	rnd 3	type Rapid	result 1
		Opponent Drennen, L (Liam)				Opponent Meyer, H (Harold)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament Bo-Weskus Skole Prestige 2020				Tournament West Coast Schools Prestige 2020
		date 2020-02-15	rnd 3	type Standard	result 1	date 2020-03-07	rnd 2	type Rapid	result 1
		Opponent Massent, K (Keithan)				Opponent Cloete, A (Alesundro)
2	5	Tournament Weskus Skole Prestige Skaak Kampioenskappe 2019				Tournament West Coast Open 2019
		date 2019-04-06	rnd 6	type Standard	result 1	date 2019-04-27	rnd 4	type Standard	result 1
		Opponent Muller, J (Jayden)				Opponent Mattheus, E (Elcay)
3	4	Tournament Bo-Weskus Skole Skaak Prestige 2021				Tournament Bo-Weskus Skole Skaak Prestige 2021
		date 2021-05-08	rnd 1	type Rapid	result 1	date 2021-05-08	rnd 4	type Rapid	result 1
		Opponent Andrew, K (Keenan)				Opponent Cloete, H (Howard)

#	Games	Start				End
1	5	Tournament Weskus Skole Prestige Skaak Kampioenskappe 2019				Tournament West Coast Open 2019
		date 2019-04-06	rnd 6	type Standard	result 1	date 2019-04-27	rnd 4	type Standard	result 1
		Opponent Muller, J (Jayden)				Opponent Mattheus, E (Elcay)
2	4	Tournament Bo-Weskus Skole Prestige 2020				Tournament Bo-Weskus Skole Prestige 2020
		date 2020-02-15	rnd 3	type Standard	result 1	date 2020-02-15	rnd 6	type Standard	result 1
		Opponent Massent, K (Keithan)				Opponent Joseph, R (Riaan)
3	2	Tournament Western Cape Top Schools 2019				Tournament Bo-Weskus Skole Prestige 2020
		date 2019-09-01	rnd 5	type Standard	result 1	date 2020-02-15	rnd 1	type Standard	result 1
		Opponent Smit, V (Van Rooy)				Opponent Engelbrecht, R (Ryan)

#	Games	Start				End
1	4	Tournament Bo-Weskus Skole Skaak Prestige 2021				Tournament Bo-Weskus Skole Skaak Prestige 2021
		date 2021-05-08	rnd 1	type Rapid	result 1	date 2021-05-08	rnd 4	type Rapid	result 1
		Opponent Andrew, K (Keenan)				Opponent Cloete, H (Howard)
2	2	Tournament Olifantsrivier CC 2021				Tournament Olifantsrivier CC 2021
		date 2021-03-27	rnd 2	type Rapid	result 1	date 2021-03-27	rnd 3	type Rapid	result 1
		Opponent Drennen, L (Liam)				Opponent Meyer, H (Harold)
3	2	Tournament West Coast Schools Prestige 2020				Tournament West Coast Schools Prestige 2020
		date 2020-03-07	rnd 1	type Rapid	result 1	date 2020-03-07	rnd 2	type Rapid	result 1
		Opponent Matthys, E (Elijah)				Opponent Cloete, A (Alesundro)

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	Van Zyl ,M (Mea)	2	1	0	2	1	0	0	0	0	0	0	0
1	Van Zyl ,M (Mea)	2	1179.8	1179.8	2	1111.3	1179.8	0	0	0	0	0	0
2	Muller ,J (Jayden)	2	2	425	2	2	425	0	0	0	0	0	0
2	Muller ,J (Jayden)	2	1188.2	1613.2	2	1170.2	1613.2	0	0	0	0	0	0
3	Hausiku ,M (Marco)	2	1	0	1	1	425	1	0	-425	0	0	0
3	Hausiku ,M (Marco)	2	1288.9	1288.9	1	1241.6	1713.9	1	1251	863.9	0	0	0
4	Saal ,J (Junior)	2	1	0	1	1	425	1	0	-425	0	0	0
4	Saal ,J (Junior)	2	1207.2	1207.2	1	1200	1632.2	1	1200	782.2	0	0	0
5	Joseph ,R (Riaan)	2	1	0	1	1	425	1	0	-425	0	0	0
5	Joseph ,R (Riaan)	2	1198.1	1198.1	1	1188.2	1623.1	1	1200	773.1	0	0	0
6	Knoesen ,Z (Zichri)	1	1	425	1	1	425	0	0	0	0	0	0
6	Knoesen ,Z (Zichri)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Diergaardt ,J (Jumaine)	1	1	425	1	1	425	0	0	0	0	0	0
7	Diergaardt ,J (Jumaine)	1	1191.4	1616.4	1	1200	1616.4	0	0	0	0	0	0
8	Wilson ,L (Leston)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Wilson ,L (Leston)	1	1092.6	667.6	1	1040.4	667.6	0	0	0	0	0	0
9	Boois ,S (Samiel)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Boois ,S (Samiel)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Kariem ,S (Shakir)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Kariem ,S (Shakir)	1	1301.3	876.3	1	1214	876.3	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

Pretorius, JB (Johnny Barend)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms