Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Jager, J (Jonathan)

Chess SA id

1090157479

FIDE id

Date of birth

2009-07-23 (U18)

Gender

Male

Region

Amajuba (KAN)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-07-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1307.6	1282.1	1294.7	1200
Raw rating	1307.6	1282.1	1294.7	1200
Weighted rating	1298.2	1274.3	1286.7	1200
Weighted performance	0	0	0	0
Floor	809.3	782.1	794.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	142.2	147.5	144.9	165.8
Highest rating	1464.7 2024-05-01	1591.7 2024-05-01	1446.3 2024-04-01	1200 2018-10-01
Highest raw rating	1309.3 2024-06-01	1282.1 2024-08-01	1294.7 2024-05-01	1200 2024-02-01
Highest weighted rating	1292 2025-08-01	1269.6 2025-08-01	1281 2025-08-01	1200 2018-10-01
Highest weighted performance	1464.7 2024-05-01	1591.7 2024-05-01	1446.3 2024-04-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1307.6	1282.1	1294.7	1200
Analysis
Rating	1307.6	1282.1	1294.7	1200
Raw rating	1307.6	1282.1	1294.7	1200
Weighted rating	1298.2	1274.3	1286.7
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	809.3	782.1	794.7	700
Max/Min rating change allowed	142.2	147.5	144.9	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	1307.6	1282.1	1294.7	1200
New weighted rating	1300.7	1276.2	1289	1200
New weighted performance	0	0	0	0
Temp new rating	1307.6	1282.1	1294.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1307.6	1282.1	1294.7	1200
New K-factor	36	36	36	36
New floor	809.3	782.1	794.7	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	18	12	6
	7	0	7
	0	0	0
	0	0	0
History	25	12	13

Games since
	Main 18	Standard 12		Rapid 6		Blitz 0
Gender	Male
Age group	U18
Region	Amajuba (KAN)
Province	KwaZulu Natal (KZ)
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	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	25	16.5	66	136	1255.5	1391.5
Standard	12	7.5	62.5	106.2	1311.1	1417.3
Rapid	13	9	69.23	163.5	1204.3	1367.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1307.6	1282.1	1294.7	1200
2025-09-01	1307.6	1282.1	1294.7	1200
2025-08-01	1307.6	1282.1	1294.7	1200
2025-07-01	1307.6	1282.1	1294.7	1200
2025-06-01	1307.6	1282.1	1294.7	1200
2025-05-01	1307.6	1282.1	1294.7	1200
2025-04-01	1307.6	1282.1	1294.7	1200
2025-03-01	1307.6	1282.1	1294.7	1200
2025-02-01	1307.6	1282.1	1294.7	1200
2025-01-01	1307.6	1282.1	1294.7	1200
2024-12-01	1307.6	1282.1	1294.7	1200
2024-11-01	1307.6	1282.1	1294.7	1200
2024-10-01	1307.6	1282.1	1294.7	1200
2024-09-01	1307.6	1282.1	1294.7	1200
2024-08-01	1307.6	1282.1	1294.7	1200
2024-07-01	1309.3	1279.2	1294.7	1200
2024-06-01	1309.3	1279.2	1294.7	1200
2024-08-01	1254	1200	1294.7	1200
2024-04-01	1189.8	1200	1180.6	1200
2024-03-01	1189.8	1200	1180.6	1200
2024-02-01	1189.8	1200	1180.6	1200
2024-01-01	1189.8	1200	1180.6	1200
2023-12-01	1189.8	1200	1180.6	1200
2023-11-01	1189.8	1200	1180.6	1200

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	South African Open Chess Championship 2024 (C)	2024-07-04	2024-07-07	Standard	Ethekwini (KED)	7	7	3.5	Yes	Analysis
2	Curro Chess Tournament 2024 (U16)	2024-05-18	2024-05-18	Standard	Ehlanzeni (MEN)	5	5	4	Yes	Analysis
3	NWU Super 16 2024	2024-04-19	2024-04-19	Rapid	Gert Sibande (MGS)	6	6	6	Yes	Analysis
4	2023 KZN Winter Schools Selections (U15 Boys)	2023-06-24	2023-06-24	Rapid	Ethekwini (KED)	7	7	3	Yes	Analysis

#	Games	Start				End
1	7	Tournament NWU Super 16 2024				Tournament Curro Chess Tournament 2024
		date 2024-04-19	rnd 1	type Rapid	result 1	date 2024-05-18	rnd 1	type Standard	result 1
		Opponent Nelson, D (Duncan)				Opponent Mkhize, M (Mpilenhle)
2	3	Tournament South African Open Chess Championship 2024				Tournament South African Open Chess Championship 2024
		date 2024-07-04	rnd 2	type Standard	result 1	date 2024-07-05	rnd 4	type Standard	result 1
		Opponent Madhoo, P (Prathana)				Opponent Taljaard, C (Connor)
3	3	Tournament Curro Chess Tournament 2024				Tournament Curro Chess Tournament 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-18	rnd 5	type Standard	result 1
		Opponent Makamo, M (Mihla)				Opponent Mabuza, S (Sonke)

#	Games	Start				End
1	3	Tournament South African Open Chess Championship 2024				Tournament South African Open Chess Championship 2024
		date 2024-07-04	rnd 2	type Standard	result 1	date 2024-07-05	rnd 4	type Standard	result 1
		Opponent Madhoo, P (Prathana)				Opponent Taljaard, C (Connor)
2	3	Tournament Curro Chess Tournament 2024				Tournament Curro Chess Tournament 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-18	rnd 5	type Standard	result 1
		Opponent Makamo, M (Mihla)				Opponent Mabuza, S (Sonke)
3	1	Tournament South African Open Chess Championship 2024				Tournament South African Open Chess Championship 2024
		date 2024-07-07	rnd 7	type Standard	result 0.5	date 2024-07-07	rnd 7	type Standard	result 0.5
		Opponent Omile, C (Chukwuebuka Raphael)				Opponent Omile, C (Chukwuebuka Raphael)

#	Games	Start				End
1	6	Tournament NWU Super 16 2024				Tournament NWU Super 16 2024
		date 2024-04-19	rnd 1	type Rapid	result 1	date 2024-04-19	rnd 6	type Rapid	result 1
		Opponent Nelson, D (Duncan)				Opponent Sehole, K (Keaotshepa)
2	1	Tournament 2023 KZN Winter Schools Selections				Tournament 2023 KZN Winter Schools Selections
		date 2023-06-24	rnd 6	type Rapid	result 1	date 2023-06-24	rnd 6	type Rapid	result 1
		Opponent Nxumalo, O (Odwa)				Opponent Nxumalo, O (Odwa)
3	1	Tournament 2023 KZN Winter Schools Selections				Tournament 2023 KZN Winter Schools Selections
		date 2023-06-24	rnd 4	type Rapid	result 1	date 2023-06-24	rnd 4	type Rapid	result 1
		Opponent Mazibuko, A (Ayabonga)				Opponent Mazibuko, A (Ayabonga)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament NWU Super 16 2024				Tournament Curro Chess Tournament 2024
		date 2024-04-19	rnd 1	type Rapid	result 1	date 2024-05-18	rnd 1	type Standard	result 1
		Opponent Nelson, D (Duncan)				Opponent Mkhize, M (Mpilenhle)
2	3	Tournament South African Open Chess Championship 2024				Tournament South African Open Chess Championship 2024
		date 2024-07-04	rnd 2	type Standard	result 1	date 2024-07-05	rnd 4	type Standard	result 1
		Opponent Madhoo, P (Prathana)				Opponent Taljaard, C (Connor)
3	3	Tournament Curro Chess Tournament 2024				Tournament Curro Chess Tournament 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-18	rnd 5	type Standard	result 1
		Opponent Makamo, M (Mihla)				Opponent Mabuza, S (Sonke)

#	Games	Start				End
1	3	Tournament South African Open Chess Championship 2024				Tournament South African Open Chess Championship 2024
		date 2024-07-04	rnd 2	type Standard	result 1	date 2024-07-05	rnd 4	type Standard	result 1
		Opponent Madhoo, P (Prathana)				Opponent Taljaard, C (Connor)
2	3	Tournament Curro Chess Tournament 2024				Tournament Curro Chess Tournament 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-18	rnd 5	type Standard	result 1
		Opponent Makamo, M (Mihla)				Opponent Mabuza, S (Sonke)
3	1	Tournament Curro Chess Tournament 2024				Tournament Curro Chess Tournament 2024
		date 2024-05-18	rnd 1	type Standard	result 1	date 2024-05-18	rnd 1	type Standard	result 1
		Opponent Mkhize, M (Mpilenhle)				Opponent Mkhize, M (Mpilenhle)

#	Games	Start				End
1	6	Tournament NWU Super 16 2024				Tournament NWU Super 16 2024
		date 2024-04-19	rnd 1	type Rapid	result 1	date 2024-04-19	rnd 6	type Rapid	result 1
		Opponent Nelson, D (Duncan)				Opponent Sehole, K (Keaotshepa)
2	1	Tournament 2023 KZN Winter Schools Selections				Tournament 2023 KZN Winter Schools Selections
		date 2023-06-24	rnd 6	type Rapid	result 1	date 2023-06-24	rnd 6	type Rapid	result 1
		Opponent Nxumalo, O (Odwa)				Opponent Nxumalo, O (Odwa)
3	1	Tournament 2023 KZN Winter Schools Selections				Tournament 2023 KZN Winter Schools Selections
		date 2023-06-24	rnd 4	type Rapid	result 1	date 2023-06-24	rnd 4	type Rapid	result 1
		Opponent Mazibuko, A (Ayabonga)				Opponent Mazibuko, A (Ayabonga)

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	Pearson ,D (Dane)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Pearson ,D (Dane)	1	1496.4	1071.4	1	1498.2	1071.4	0	0	0	0	0	0
2	Madhoo ,P (Prathana)	1	1	425	1	1	425	0	0	0	0	0	0
2	Madhoo ,P (Prathana)	1	1138.3	1563.3	1	1200	1563.3	0	0	0	0	0	0
3	Omile ,C (Chukwuebuka Raphael)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
3	Omile ,C (Chukwuebuka Raphael)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
4	Taljaard ,C (Connor)	1	1	425	1	1	425	0	0	0	0	0	0
4	Taljaard ,C (Connor)	1	1408.3	1833.3	1	1392.1	1833.3	0	0	0	0	0	0
5	Sierra ,C (Cj)	1	1	425	1	1	425	0	0	0	0	0	0
5	Sierra ,C (Cj)	1	1321.2	1746.2	1	1321.9	1746.2	0	0	0	0	0	0
6	Mkhize ,M (Mpilenhle)	1	1	425	1	1	425	0	0	0	0	0	0
6	Mkhize ,M (Mpilenhle)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Makamo ,M (Mihla)	1	1	425	1	1	425	0	0	0	0	0	0
7	Makamo ,M (Mihla)	1	1196	1621	1	1215.8	1621	0	0	0	0	0	0
8	Ogunjiofor ,CJ (Chinedu Jeremy)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Ogunjiofor ,CJ (Chinedu Jeremy)	1	1549.5	1124.5	1	1542.5	1124.5	0	0	0	0	0	0
9	Siebritz ,Y (Yul)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Siebritz ,Y (Yul)	1	1463.4	1038.4	1	1370.8	1038.4	0	0	0	0	0	0
10	Nelson ,D (Duncan)	1	1	425	0	0	0	1	1	425	0	0	0
10	Nelson ,D (Duncan)	1	1200	1625	0	0	0	1	1200	1625	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

De Jager, 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