Chess South Africa Ratings Database

PLAYER PAGE

Personal

Petersen, J (Joshua)

Chess SA id

1090308072

FIDE id

Date of birth

2009-06-17 (U18)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-04-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1625.5

Item	Main	Standard	Rapid	Blitz
Rating	1436.7	1431.7	1301.6	1200
Raw rating	1436.7	1431.7	1301.6	1200
Weighted rating	1335.8	1312	1286.4	1200
Weighted performance	0	0	0	0
Floor	936.7	931.7	801.6	700
K-factor	32	32	36	36
Min/Max rating change allowed	118.3	119.2	143.5	165.8
Highest rating	1549.4 2024-07-01	1431.7 2025-05-05	1639.5 2024-07-01	1200 2024-10-01
Highest raw rating	1436.7 2025-05-05	1431.7 2025-05-05	1301.6 2024-10-01	1200 2024-10-01
Highest weighted rating	1436.7 2024-10-01	1283.3 2025-08-01	1301.6 2024-10-01	1200 2024-10-01
Highest weighted performance	1549.4 2024-07-01	1200 2024-10-01	1639.5 2024-07-01	1200 2024-10-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1436.7	1431.7	1301.6	1200
Analysis
Rating	1436.7	1431.7	1301.6	1200
Raw rating	1436.7	1431.7	1301.6	1200
Weighted rating	1335.8	1312	1286.4
Weighted performance	0	0	0
K-factor	32	32	36	36
Floor	936.7	931.7	801.6	700
Max/Min rating change allowed	118.3	119.2	143.5	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	1436.7	1431.7	1301.6	1200
New weighted rating	1347.7	1325.2	1289.4	1200
New weighted performance	0	0	0	0
Temp new rating	1436.7	1431.7	1301.6	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1436.7	1431.7	1301.6	1200
New K-factor	32	32	36	36
New floor	936.7	931.7	801.6	700

Item	Main	Standard	Rapid
	0	0	0
	18	18	0
	5	0	5
	0	0	0
	0	0	0
	0	0	0
History	23	18	5

Games since
	Main 23	Standard 18		Rapid 5		Blitz 0
Gender	Male
Age group	U18
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	18	11.5	63.89	118.1	1471.6	1589.7
Standard	18	11.5	63.89	118.1	1471.6	1589.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	23	16.5	71.74	184.8	1410.7	1595.5
Standard	18	11.5	63.89	118.1	1471.6	1589.7
Rapid	5	5	100	425	1191.6	1616.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1436.7	1431.7	1301.6	1200
2025-09-01	1436.7	1431.7	1301.6	1200
2025-08-01	1436.7	1431.7	1301.6	1200
2025-07-01	1436.7	1431.7	1301.6	1200
2025-06-01	1436.7	1431.7	1301.6	1200
2025-05-01	1436.7	1431.7	1301.6	1200
2025-04-01	1358.5	1335.4	1301.6	1200
2025-03-01	1312.6	1275.3	1301.6	1200
2025-02-01	1259.8	1200	1301.6	1200
2025-01-01	1259.8	1200	1301.6	1200
2024-12-01	1259.8	1200	1301.6	1200
2024-11-01	1259.8	1200	1301.6	1200
2024-10-01	1259.8	1200	1301.6	1200
2024-09-01	1259.8	1200	1301.6	1200
2024-08-01	1259.8	1200	1301.6	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	Western Cape Schools Individual Championship 2025 (U17 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
2	CT Metro Schools Individual Closed 2025 (U17 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
3	CT Metro North Schools Chess Individual Trials 2025 (U17 Open)	2025-02-08	2025-02-09	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools Individual Championship 2025 (U17 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
2	CT Metro Schools Individual Closed 2025 (U17 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
3	CT Metro North Schools Chess Individual Trials 2025 (U17 Open)	2025-02-08	2025-02-09	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
4	CT District North Top Schools 2024 (U15 Mixed)	2024-07-27	2024-07-27	Rapid	Cape Town (WCT)	5	5	5	Yes	Analysis

#	Games	Start				End
1	7	Tournament CT Metro Schools Individual Closed 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-03-02	rnd 5	type Standard	result 0.5	date 2025-04-27	rnd 5	type Standard	result 1
		Opponent Van Rhyn, A (Aden)				Opponent Jacobs, A (Aiden-Lee)
2	6	Tournament CT District North Top Schools 2024				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2025-02-08	rnd 1	type Standard	result 1
		Opponent Cloete, N (Nahum)				Opponent Hare, F (Franscios)
3	3	Tournament CT Metro North Schools Chess Individual Trials 2025				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2025-02-08	rnd 3	type Standard	result 1	date 2025-02-09	rnd 5	type Standard	result 1
		Opponent O`connell, G (Geordan)				Opponent Watson, C (Cole)

#	Games	Start				End
1	7	Tournament CT Metro Schools Individual Closed 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-03-02	rnd 5	type Standard	result 0.5	date 2025-04-27	rnd 5	type Standard	result 1
		Opponent Van Rhyn, A (Aden)				Opponent Jacobs, A (Aiden-Lee)
2	3	Tournament CT Metro North Schools Chess Individual Trials 2025				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2025-02-08	rnd 3	type Standard	result 1	date 2025-02-09	rnd 5	type Standard	result 1
		Opponent O`connell, G (Geordan)				Opponent Watson, C (Cole)
3	2	Tournament CT Metro Schools Individual Closed 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-03-01	rnd 2	type Standard	result 1	date 2025-03-01	rnd 3	type Standard	result 1
		Opponent Otto, S (Steven)				Opponent Somai, R (Ruhan)

#	Games	Start				End
1	5	Tournament CT District North Top Schools 2024				Tournament CT District North Top Schools 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Cloete, N (Nahum)				Opponent Faku, P (Phumelela)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament CT District North Top Schools 2024				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2025-02-08	rnd 1	type Standard	result 1
		Opponent Cloete, N (Nahum)				Opponent Hare, F (Franscios)
2	3	Tournament CT Metro North Schools Chess Individual Trials 2025				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2025-02-08	rnd 3	type Standard	result 1	date 2025-02-09	rnd 5	type Standard	result 1
		Opponent O`connell, G (Geordan)				Opponent Watson, C (Cole)
3	2	Tournament Western Cape Schools Individual Championship 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-04-26	rnd 4	type Standard	result 1	date 2025-04-27	rnd 5	type Standard	result 1
		Opponent Mackinna, C (Cashlin)				Opponent Jacobs, A (Aiden-Lee)

#	Games	Start				End
1	3	Tournament CT Metro North Schools Chess Individual Trials 2025				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2025-02-08	rnd 3	type Standard	result 1	date 2025-02-09	rnd 5	type Standard	result 1
		Opponent O`connell, G (Geordan)				Opponent Watson, C (Cole)
2	2	Tournament Western Cape Schools Individual Championship 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-04-26	rnd 4	type Standard	result 1	date 2025-04-27	rnd 5	type Standard	result 1
		Opponent Mackinna, C (Cashlin)				Opponent Jacobs, A (Aiden-Lee)
3	2	Tournament CT Metro Schools Individual Closed 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-03-01	rnd 2	type Standard	result 1	date 2025-03-01	rnd 3	type Standard	result 1
		Opponent Otto, S (Steven)				Opponent Somai, R (Ruhan)

#	Games	Start				End
1	5	Tournament CT District North Top Schools 2024				Tournament CT District North Top Schools 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Cloete, N (Nahum)				Opponent Faku, P (Phumelela)

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	Solomon ,I (Izaiah)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
1	Solomon ,I (Izaiah)	2	1578.9	1366.4	2	1554.7	1366.4	0	0	0	0	0	0
2	Vorster ,P (Paul)	2	1	0	2	1	0	0	0	0	0	0	0
2	Vorster ,P (Paul)	2	1657.4	1657.4	2	1639.7	1657.4	0	0	0	0	0	0
3	Jacobs ,A (Aiden-Lee)	1	1	425	1	1	425	0	0	0	0	0	0
3	Jacobs ,A (Aiden-Lee)	1	1482.4	1907.4	1	1423.3	1907.4	0	0	0	0	0	0
4	Jonkers ,T (Tristan)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Jonkers ,T (Tristan)	1	1559.6	1134.6	1	1555	1134.6	0	0	0	0	0	0
5	Munnik ,U (Uzziel)	1	1	425	1	1	425	0	0	0	0	0	0
5	Munnik ,U (Uzziel)	1	1273.3	1698.3	1	1271.3	1698.3	0	0	0	0	0	0
6	Somai ,R (Ruhan)	1	1	425	1	1	425	0	0	0	0	0	0
6	Somai ,R (Ruhan)	1	1536.5	1961.5	1	1525.8	1961.5	0	0	0	0	0	0
7	Watson ,C (Cole)	1	1	425	1	1	425	0	0	0	0	0	0
7	Watson ,C (Cole)	1	1512.5	1937.5	1	1488.7	1937.5	0	0	0	0	0	0
8	Mackinna ,C (Cashlin)	1	1	425	1	1	425	0	0	0	0	0	0
8	Mackinna ,C (Cashlin)	1	1516.8	1941.8	1	1512.3	1941.8	0	0	0	0	0	0
9	Degueldre ,J (Jean-Christian)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Degueldre ,J (Jean-Christian)	1	1683.5	1258.5	1	1693.9	1258.5	0	0	0	0	0	0
10	Niewenhuys ,C (Cameron)	1	1	425	1	1	425	0	0	0	0	0	0
10	Niewenhuys ,C (Cameron)	1	1212	1637	1	1212.4	1637	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Petersen, J (Joshua)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms