Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Deventer, J (Jonathan)

Chess SA id

1110108342

FIDE id

Date of birth

2011-01-04 (U16)

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	1257.9	1254.7	1200	1200
Raw rating	1243.5	1237.2	1200	1200
Weighted rating	1257.9	1254.7	1200	1200
Weighted performance	1020.3	1016.2	0	0
Floor	762.3	760.2	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	155.9	157.3	165.8	165.8
Highest rating	1262.3 2024-09-01	1260.2 2024-09-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1262.3 2024-09-01	1260.2 2024-09-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1260.2 2025-08-01	1257.6 2025-08-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1231.6 2020-01-01	1216.4 2020-01-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-1.1	-1.4	0	0
New rating	1256.8	1253.4	1200	1200
Analysis
Rating	1257.9	1254.7	1200	1200
Raw rating	1243.5	1237.2	1200	1200
Weighted rating	1257.9	1254.7	1200
Weighted performance	1020.3	1016.2	0
K-factor	36	36	36	36
Floor	762.3	760.2	700	700
Max/Min rating change allowed	155.9	157.3	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	1243.5	1237.2	1200	1200
New weighted rating	1256.8	1253.4	1200	1200
New weighted performance	1019.9	1015.8	0	0
Temp new rating	1256.8	1253.4	1200	1200
Temp new rating +/-	-1.1	-1.4	0	0
Final new rating +/-	-1.1	-1.4	0	0
New rating	1256.8	1253.4	1200	1200
New K-factor	36	36	36	36
New floor	762.3	760.2	700	700

Item	Main	Standard
	0	0
	5	5
	5	5
	5	5
	10	10
	10	10
History	93	93

Games since
	Main 10	Standard 10		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	5	1	20	-255	1411.5	1156.5
Standard	5	1	20	-255	1411.5	1156.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	93	46.5	50	0	1210.6	1210.6
Standard	93	46.5	50	0	1210.6	1210.6
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1243.5	1237.2	1200	1200
2025-09-01	1243.5	1237.2	1200	1200
2025-08-01	1262.3	1260.2	1200	1200
2025-07-01	1262.3	1260.2	1200	1200
2025-06-01	1262.3	1260.2	1200	1200
2025-05-01	1262.3	1260.2	1200	1200
2025-04-01	1262.3	1260.2	1200	1200
2025-03-01	1262.3	1260.2	1200	1200
2025-02-01	1262.3	1260.2	1200	1200
2025-01-01	1262.3	1260.2	1200	1200
2024-12-01	1262.3	1260.2	1200	1200
2024-11-01	1262.3	1260.2	1200	1200
2024-10-01	1262.3	1260.2	1200	1200
2024-09-01	1262.3	1260.2	1200	1200
2024-08-01	1254.2	1250.1	1200	1200
2024-07-01	1254.2	1250.1	1200	1200
2024-06-01	1254.2	1250.1	1200	1200
2024-08-01	1254.2	1250.1	1200	1200
2024-04-01	1254.2	1250.1	1200	1200
2024-03-01	1254.2	1250.1	1200	1200
2024-02-01	1254.2	1250.1	1200	1200
2024-01-01	1254.2	1250.1	1200	1200
2023-12-01	1254.2	1250.1	1200	1200
2023-11-01	1254.2	1250.1	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	2025 Tshwane South School District CLOSED League Championship (U17A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District CLOSED League Championship (U17A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
2	D4 Tshwane South District Schools Teams Chess Tournament 2024 (U13A)	2024-08-03	2024-08-03	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
3	2023 Tshwane South School District CLOSED League Championship (U13)	2023-07-29	2023-07-29	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
4	D4 Play Offs 2022 (U13)	2022-07-30	2022-07-30	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
5	2022 Tshwane Chess Open Registration Tournament (C2)	2022-01-29	2022-01-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
6	2021 Chris Greyling Open Tournament (C)	2021-05-08	2021-05-08	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
7	2021 Registration Tournament (C)	2021-03-13	2021-03-13	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
8	2020 Waterkloof Open (C)	2020-02-29	2020-03-01	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
9	2020 Blou Bul (C)	2020-02-15	2020-02-15	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
10	2020 Registration Tournament (D)	2020-01-25	2020-01-25	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
11	2019 South African Junior Team Championships (U10B)	2020-01-08	2020-01-08	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
12	2019 TC SAJCC Prep Tournament (C)	2019-11-30	2019-11-30	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
13	2019 Etienne Lewis Trials (U10 Boys)	2019-08-30	2019-09-01	Standard	Tshwane (GTP)	7	7	4	Yes	Analysis
14	2019 Alekhine Open (E)	2019-08-09	2019-08-09	Standard	Tshwane (GTP)	5	4	1.5	Yes	Analysis
15	2019 Menlo Open (E)	2019-07-13	2019-07-13	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
16	2019 Chris Greyling (E)	2019-04-27	2019-04-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
17	2019 Blou Bul (E)	2019-02-16	2019-02-16	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
18	2019 Tshwane Chess Registration Tournament (E)	2019-01-26	2019-01-26	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis

#	Games	Start				End
1	5	Tournament 2020 Registration Tournament				Tournament 2020 Blou Bul
		date 2020-01-25	rnd 2	type Standard	result 1	date 2020-02-15	rnd 1	type Standard	result 1
		Opponent Henning, T (Tiaan)				Opponent Grobler, A (Amorette)
2	4	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Tshwane South School District CLOSED League Championship
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-07-29	rnd 4	type Standard	result 0.5
		Opponent Chathury, N (Nihal)				Opponent Pillay, T (Tahir)
3	4	Tournament 2022 Tshwane Chess Open Registration Tournament				Tournament D4 Play Offs 2022
		date 2022-01-29	rnd 4	type Standard	result 1	date 2022-07-30	rnd 2	type Standard	result 1
		Opponent Odendaal, Z (Zandri)				Opponent Bogaard, FK (Franco)

#	Games	Start				End
1	5	Tournament 2020 Registration Tournament				Tournament 2020 Blou Bul
		date 2020-01-25	rnd 2	type Standard	result 1	date 2020-02-15	rnd 1	type Standard	result 1
		Opponent Henning, T (Tiaan)				Opponent Grobler, A (Amorette)
2	4	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Tshwane South School District CLOSED League Championship
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-07-29	rnd 4	type Standard	result 0.5
		Opponent Chathury, N (Nihal)				Opponent Pillay, T (Tahir)
3	4	Tournament 2022 Tshwane Chess Open Registration Tournament				Tournament D4 Play Offs 2022
		date 2022-01-29	rnd 4	type Standard	result 1	date 2022-07-30	rnd 2	type Standard	result 1
		Opponent Odendaal, Z (Zandri)				Opponent Bogaard, FK (Franco)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament 2020 Registration Tournament				Tournament 2020 Blou Bul
		date 2020-01-25	rnd 2	type Standard	result 1	date 2020-02-15	rnd 1	type Standard	result 1
		Opponent Henning, T (Tiaan)				Opponent Grobler, A (Amorette)
2	3	Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024				Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024
		date 2024-08-03	rnd 1	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Nienaber, J (Josua)				Opponent Coetzee, A (Adriaan)
3	3	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Tshwane South School District CLOSED League Championship
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-07-29	rnd 3	type Standard	result 1
		Opponent Chathury, N (Nihal)				Opponent Alberts, L (Levi)

#	Games	Start				End
1	5	Tournament 2020 Registration Tournament				Tournament 2020 Blou Bul
		date 2020-01-25	rnd 2	type Standard	result 1	date 2020-02-15	rnd 1	type Standard	result 1
		Opponent Henning, T (Tiaan)				Opponent Grobler, A (Amorette)
2	3	Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024				Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024
		date 2024-08-03	rnd 1	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Nienaber, J (Josua)				Opponent Coetzee, A (Adriaan)
3	3	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Tshwane South School District CLOSED League Championship
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-07-29	rnd 3	type Standard	result 1
		Opponent Chathury, N (Nihal)				Opponent Alberts, L (Levi)

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	Suresh ,A (Aaradhya)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
1	Suresh ,A (Aaradhya)	2	1316.4	1528.9	2	1304.4	1528.9	0	0	0	0	0	0
2	Klopper ,PA (Phillippus Arnoldus)	2	2	425	2	2	425	0	0	0	0	0	0
2	Klopper ,PA (Phillippus Arnoldus)	2	1221.7	1646.7	2	1215.8	1646.7	0	0	0	0	0	0
3	Van Deventer ,NS (Nathaniel Steven)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Van Deventer ,NS (Nathaniel Steven)	2	1319.3	894.3	2	1299.4	894.3	0	0	0	0	0	0
4	Webb ,K (Kagan)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Webb ,K (Kagan)	2	1280	855	2	1261.8	855	0	0	0	0	0	0
5	Senekal ,W (William)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
5	Senekal ,W (William)	2	1004.5	792	2	994.3	792	0	0	0	0	0	0
6	Marais ,JS (Jacobus Stephanus)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Marais ,JS (Jacobus Stephanus)	2	1066.4	641.4	2	1056.3	641.4	0	0	0	0	0	0
7	Bogaard ,FK (Franco Konrad)	2	1	0	2	1	0	0	0	0	0	0	0
7	Bogaard ,FK (Franco Konrad)	2	1269	1269	2	1236.6	1269	0	0	0	0	0	0
8	Smith ,Z (Zion)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Smith ,Z (Zion)	1	1400.5	975.5	1	1389.8	975.5	0	0	0	0	0	0
9	Niehaus ,SJ (Samuel Johannes)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Niehaus ,SJ (Samuel Johannes)	1	1034.2	609.2	1	1034.2	609.2	0	0	0	0	0	0
10	Ferreira ,L (Louis)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Ferreira ,L (Louis)	1	1237.3	812.3	1	1231.5	812.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Van Deventer, 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