Chess South Africa Ratings Database

PLAYER PAGE

Personal

Diederiks, J (Jonathan)

Chess SA id

1080115215

FIDE id

Date of birth

2008-01-08 (U18)

Gender

Male

Region

Tshwane (GTP)

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	1207.1	1204.2	1200	1200
Raw rating	1184.2	1175.3	1200	1200
Weighted rating	1207.1	1204.2	1200	1200
Weighted performance	0	0	0	0
Floor	727.2	731.2	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	169.6	171.8	165.8	165.8
Highest rating	1237.2 2019-08-01	1233.2 2019-08-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1227.2 2020-01-01	1231.2 2020-01-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1227.2 2021-08-01	1231.2 2021-08-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1237.2 2019-08-01	1233.2 2019-08-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.1	-2.6	0	0
New rating	1205	1201.6	1200	1200
Analysis
Rating	1207.1	1204.2	1200	1200
Raw rating	1184.2	1175.3	1200	1200
Weighted rating	1207.1	1204.2	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	727.2	731.2	700	700
Max/Min rating change allowed	169.6	171.8	165.8	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	1184.2	1175.3	1200	1200
New weighted rating	1205	1201.6	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1205	1201.6	1200	1200
Temp new rating +/-	-2.1	-2.6	0	0
Final new rating +/-	-2.1	-2.6	0	0
New rating	1205	1201.6	1200	1200
New K-factor	36	36	36	36
New floor	727.2	731.2	700	700

Item	Main	Standard
	0	0
	3	3
	0	0
	5	5
	0	0
	0	0
History	18	18

Games since
	Main 3	Standard 3		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Tshwane (GTP)
Province	Gauteng (GT)
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	3	0.5	16.67	-283.3	1227.6	944.3
Standard	3	0.5	16.67	-283.3	1227.6	944.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	18	8.5	47.22	-23.6	1207.9	1184.2
Standard	18	8.5	47.22	-23.6	1207.9	1184.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1184.2	1175.3	1200	1200
2025-09-30	1184.2	1175.3	1200	1200
2025-09-01	1184.2	1175.3	1200	1200
2025-08-01	1213.9	1213	1200	1200
2025-07-01	1213.9	1213	1200	1200
2025-06-01	1213.9	1213	1200	1200
2025-05-01	1213.9	1213	1200	1200
2025-04-01	1213.9	1213	1200	1200
2025-03-01	1213.9	1213	1200	1200
2025-02-01	1213.9	1213	1200	1200
2025-01-01	1213.8	1212.8	1200	1200
2024-12-01	1213.8	1212.8	1200	1200
2024-11-01	1213.8	1212.8	1200	1200
2024-10-01	1213.8	1212.8	1200	1200
2024-09-01	1213.8	1212.8	1200	1200
2024-08-01	1213.8	1212.8	1200	1200
2024-07-01	1213.8	1212.8	1200	1200
2024-09-01	1213.8	1212.8	1200	1200
2024-05-01	1213.8	1212.8	1200	1200
2024-04-01	1213.8	1212.8	1200	1200
2024-03-01	1213.8	1212.8	1200	1200
2024-02-01	1213.8	1212.8	1200	1200
2024-01-01	1213.8	1212.8	1200	1200
2023-12-01	1213.8	1212.8	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	D5 Teams 2025 (U17 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	3	3	0.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	D5 Teams 2025 (U17 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	3	3	0.5	Yes	Analysis
2	Gauteng Schools Individual Finals 2023 (U15 Boys)	2023-05-27	2023-05-27	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
3	2019 Gauteng School League Finals (U11 Open)	2019-08-23	2019-08-23	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
4	Springs Open 2019 (C)	2019-08-31	2019-08-31	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

#	Games	Start				End
1	4	Tournament 2019 Gauteng School League Finals				Tournament 2019 Gauteng School League Finals
		date 2019-08-23	rnd 1	type Standard	result 1	date 2019-08-23	rnd 4	type Standard	result 1
		Opponent Dubazana, O (Olwethu)				Opponent Monehela, T (Tsholofelo)
2	2	Tournament Springs Open 2019				Tournament Springs Open 2019
		date 2019-08-31	rnd 2	type Standard	result 1	date 2019-08-31	rnd 3	type Standard	result 1
		Opponent Zwane, N (Ntokozo)				Opponent Lovett, S (Saffron)
3	1	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 3	type Standard	result 0.5	date 2025-08-16	rnd 3	type Standard	result 0.5
		Opponent Brits, L (Line')				Opponent Brits, L (Line')

#	Games	Start				End
1	4	Tournament 2019 Gauteng School League Finals				Tournament 2019 Gauteng School League Finals
		date 2019-08-23	rnd 1	type Standard	result 1	date 2019-08-23	rnd 4	type Standard	result 1
		Opponent Dubazana, O (Olwethu)				Opponent Monehela, T (Tsholofelo)
2	2	Tournament Springs Open 2019				Tournament Springs Open 2019
		date 2019-08-31	rnd 2	type Standard	result 1	date 2019-08-31	rnd 3	type Standard	result 1
		Opponent Zwane, N (Ntokozo)				Opponent Lovett, S (Saffron)
3	1	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 3	type Standard	result 0.5	date 2025-08-16	rnd 3	type Standard	result 0.5
		Opponent Brits, L (Line')				Opponent Brits, L (Line')

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 2019 Gauteng School League Finals				Tournament 2019 Gauteng School League Finals
		date 2019-08-23	rnd 1	type Standard	result 1	date 2019-08-23	rnd 4	type Standard	result 1
		Opponent Dubazana, O (Olwethu)				Opponent Monehela, T (Tsholofelo)
2	2	Tournament Springs Open 2019				Tournament Springs Open 2019
		date 2019-08-31	rnd 2	type Standard	result 1	date 2019-08-31	rnd 3	type Standard	result 1
		Opponent Zwane, N (Ntokozo)				Opponent Lovett, S (Saffron)
3	1	Tournament Gauteng Schools Individual Finals 2023				Tournament Gauteng Schools Individual Finals 2023
		date 2023-05-27	rnd 4	type Standard	result 1	date 2023-05-27	rnd 4	type Standard	result 1
		Opponent Mokele, R (Reabetsoe)				Opponent Mokele, R (Reabetsoe)

#	Games	Start				End
1	4	Tournament 2019 Gauteng School League Finals				Tournament 2019 Gauteng School League Finals
		date 2019-08-23	rnd 1	type Standard	result 1	date 2019-08-23	rnd 4	type Standard	result 1
		Opponent Dubazana, O (Olwethu)				Opponent Monehela, T (Tsholofelo)
2	2	Tournament Springs Open 2019				Tournament Springs Open 2019
		date 2019-08-31	rnd 2	type Standard	result 1	date 2019-08-31	rnd 3	type Standard	result 1
		Opponent Zwane, N (Ntokozo)				Opponent Lovett, S (Saffron)
3	1	Tournament Gauteng Schools Individual Finals 2023				Tournament Gauteng Schools Individual Finals 2023
		date 2023-05-27	rnd 4	type Standard	result 1	date 2023-05-27	rnd 4	type Standard	result 1
		Opponent Mokele, R (Reabetsoe)				Opponent Mokele, R (Reabetsoe)

No games found.

#	Games	Start				End

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	Gibbens ,A (Allan)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Gibbens ,A (Allan)	1	1271.2	846.2	1	1275.5	846.2	0	0	0	0	0	0
2	Li ,E (Enyang)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Li ,E (Enyang)	1	1205.3	780.3	1	1200	780.3	0	0	0	0	0	0
3	Greyling ,D (Duncan)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Greyling ,D (Duncan)	1	1156.6	731.6	1	1148.7	731.6	0	0	0	0	0	0
4	Dubazana ,O (Olwethu)	1	1	425	1	1	425	0	0	0	0	0	0
4	Dubazana ,O (Olwethu)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Du Toit ,SJM (Stephanus (Matteo) Johannes Matheus)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Du Toit ,SJM (Stephanus (Matteo) Johannes Matheus)	1	1474.4	1049.4	1	1472.5	1049.4	0	0	0	0	0	0
6	Nhamposse ,YL (Yamkela Lumbani Jnr)	1	1	425	1	1	425	0	0	0	0	0	0
6	Nhamposse ,YL (Yamkela Lumbani Jnr)	1	1165.4	1590.4	1	1157.2	1590.4	0	0	0	0	0	0
7	Zwane ,N (Ntokozo)	1	1	425	1	1	425	0	0	0	0	0	0
7	Zwane ,N (Ntokozo)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Rothmann ,WR (Willem Ruwan)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Rothmann ,WR (Willem Ruwan)	1	1208.1	783.1	1	1200.3	783.1	0	0	0	0	0	0
9	Buthelezi ,N (Nkanyiso)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Buthelezi ,N (Nkanyiso)	1	1172.4	747.4	1	1170.4	747.4	0	0	0	0	0	0
10	Brits ,L (Line')	1	0.5	0	1	0.5	0	0	0	0	0	0	0
10	Brits ,L (Line')	1	1228.6	1228.6	1	1233.6	1228.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Diederiks, J (Jonathan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms