Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Jager, K (Kobus)

Chess SA id

1130144480

FIDE id

Date of birth

2013-01-10 (U14)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-26

Personal details last changed

1900-01-01

Junior GPX Games

13.5

Junior GPX Points

1347.1

Item	Main	Standard	Rapid	Blitz
Rating	1385.1	1357.9	1298.7	1200
Raw rating	1385.1	1357.9	1298.7	1200
Weighted rating	1302.4	1301.1	1213	1200
Weighted performance	1349.2	1223.6	0	0
Floor	885.1	857.9	798.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	127.4	132.4	144.1	165.8
Highest rating	1385.1 2025-11-01	1357.9 2025-09-01	1298.7 2025-11-01	1200 2018-10-01
Highest raw rating	1385.1 2025-11-01	1357.9 2025-09-01	1298.7 2025-11-01	1200 2024-02-01
Highest weighted rating	1302.4 2025-11-01	1290.2 2025-09-01	1213 2025-11-01	1200 2018-10-01
Highest weighted performance	1349.2 2025-11-01	1333 2023-08-01	1222.7 2023-10-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1385.1	1357.9	1298.7	1200
Analysis
Rating	1385.1	1357.9	1298.7	1200
Raw rating	1385.1	1357.9	1298.7	1200
Weighted rating	1302.4	1301.1	1213
Weighted performance	1349.2	1223.6	0
K-factor	36	36	36	36
Floor	885.1	857.9	798.7	700
Max/Min rating change allowed	127.4	132.4	144.1	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	1385.1	1357.9	1298.7	1200
New weighted rating	1309.8	1306.4	1220.2	1200
New weighted performance	1340.9	1215.5	0	0
Temp new rating	1385.1	1357.9	1298.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1385.1	1357.9	1298.7	1200
New K-factor	36	36	36	36
New floor	885.1	857.9	798.7	700

Item	Main	Standard	Rapid
	0	0	0
	17	10	7
	11	4	7
	29	24	5
	15	15	0
	0	0	0
History	72	53	19

Games since
	Main 28	Standard 14		Rapid 14		Blitz 0
Gender	Male
Age group	U14
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	17	13.5	79.41	250	1268.7	1518.7
Standard	10	7.5	75	212.5	1285.6	1498.1
Rapid	7	6	85.71	303.6	1244.4	1548
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	72	43	59.72	82.6	1239.8	1322.4
Standard	53	31	58.49	72.2	1225.7	1297.9
Rapid	19	12	63.16	111.8	1279	1390.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1385.1	1357.9	1298.7	1200
2025-09-30	1348.4	1357.9	1205.8	1200
2025-09-01	1348.4	1357.9	1205.8	1200
2025-08-01	1308.6	1311.6	1205.8	1200
2025-07-01	1308.6	1311.6	1205.8	1200
2025-06-01	1308.6	1311.6	1205.8	1200
2025-05-01	1279.1	1277.7	1205.8	1200
2025-04-01	1278.9	1277.7	1205.8	1200
2025-03-01	1278.7	1277.5	1205.8	1200
2025-02-01	1278.1	1276.8	1205.8	1200
2025-01-01	1275.7	1271.3	1205.8	1200
2024-12-01	1275.7	1271.3	1205.8	1200
2024-11-01	1275.7	1271.3	1205.8	1200
2024-10-01	1275.7	1271.3	1205.8	1200
2024-09-01	1275.7	1271.3	1205.8	1200
2024-08-01	1275.7	1271.3	1205.8	1200
2024-07-01	1270.1	1271.3	1204	1200
2024-09-01	1270.1	1271.3	1204	1200
2024-05-01	1270.1	1271.3	1204	1200
2024-04-01	1270.1	1271.3	1204	1200
2024-03-01	1270.1	1271.3	1204	1200
2024-02-01	1270.1	1271.3	1204	1200
2024-01-01	1315.4	1318.8	1204	1200
2023-12-01	1315.4	1318.8	1204	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 Super 8 (Senior)	2025-09-26	2025-09-26	Rapid	Ekurhuleni (GE)	7	7	6	Yes	Analysis
2	GDE (D7) Sedibeng East Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
3	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U13 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Super 8 (Senior)	2025-09-26	2025-09-26	Rapid	Ekurhuleni (GE)	7	7	6	Yes	Analysis
2	GDE (D7) Sedibeng East Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
3	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U13 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
4	Midvaal Winter Classic 13 July 2024 (E)	2024-07-13	2024-07-13	Rapid	Sedibeng (GSV)	7	7	3.5	Yes	Analysis
5	2024 Gauteng Inter-Region Chess Championship (U12B)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
6	Dr Pieter Hangelbroek Rapid 2023 (C)	2023-10-28	2023-10-28	Rapid	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
7	2023 Gauteng Top Schools (U11 Mixed)	2023-08-18	2023-08-18	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
8	Gauteng D7 Teams 2023 (U11)	2023-08-12	2023-08-12	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
9	Overvaal Ope Jul 2023 (D)	2023-07-22	2023-07-22	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
10	Gauteng Schools D7 2023 (U11 Boys)	2023-05-20	2023-05-20	Standard	Sedibeng (GSV)	5	4	1.5	Yes	Analysis
11	Laerkool Midvaal Chess Open 2023 (E)	2023-01-28	2023-01-28	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
12	Dr Peter Hangelbroek Open 2022 (F)	2022-10-29	2022-10-29	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
13	Overvaal Open 2022 (D)	2022-08-06	2022-08-06	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
14	Eureka Open 2022 (G+H)	2022-07-30	2022-07-30	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament Overvaal Ope Jul 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-22	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Mothakama, M (Morwesi)				Opponent Myburgh, A (Amy)
2	5	Tournament GDE (D7) Sedibeng East Schools 2025				Tournament 2025 Super 8
		date 2025-08-02	rnd 5	type Standard	result 1	date 2025-09-26	rnd 4	type Rapid	result 1
		Opponent Van Der Merwe, W (Willem)				Opponent Holtzhausen, D (Daniel)
3	4	Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025				Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025
		date 2025-05-24	rnd 1	type Standard	result 1	date 2025-05-24	rnd 4	type Standard	result 1
		Opponent Gouws, S (Samuel Johannes J)				Opponent Kitabazi, A (Audric)

#	Games	Start				End
1	6	Tournament Overvaal Ope Jul 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-22	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Mothakama, M (Morwesi)				Opponent Myburgh, A (Amy)
2	4	Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025				Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025
		date 2025-05-24	rnd 1	type Standard	result 1	date 2025-05-24	rnd 4	type Standard	result 1
		Opponent Gouws, S (Samuel Johannes J)				Opponent Kitabazi, A (Audric)
3	3	Tournament GDE (D7) Sedibeng East Schools 2025				Tournament GDE (D7) Sedibeng East Schools 2025
		date 2025-08-02	rnd 1	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Honalline, L (Lamitro)				Opponent Mogorosi, P (Pako)

#	Games	Start				End
1	2	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 5	type Rapid	result 1	date 2024-07-13	rnd 6	type Rapid	result 0.5
		Opponent Van Rensburg, H (Hanno)				Opponent Booysen, Z (Zian)
2	2	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 2	type Rapid	result 1	date 2024-07-13	rnd 3	type Rapid	result 1
		Opponent Smit, L (Liane)				Opponent Myburgh, V (Vaughn)
3	2	Tournament Dr Pieter Hangelbroek Rapid 2023				Tournament Dr Pieter Hangelbroek Rapid 2023
		date 2023-10-28	rnd 1	type Rapid	result 0.5	date 2023-10-28	rnd 2	type Rapid	result 1
		Opponent Van Der Merwe, W (Willem)				Opponent Viljoen, S (Shenique)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament Overvaal Ope Jul 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-22	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Mothakama, M (Morwesi)				Opponent Myburgh, A (Amy)
2	3	Tournament GDE (D7) Sedibeng East Schools 2025				Tournament GDE (D7) Sedibeng East Schools 2025
		date 2025-08-02	rnd 1	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Honalline, L (Lamitro)				Opponent Mogorosi, P (Pako)
3	3	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-18	rnd 2	type Standard	result 1	date 2023-08-18	rnd 4	type Standard	result 1
		Opponent Tshibamba, J (Jael)				Opponent Pieters, I (Imrich)

#	Games	Start				End
1	6	Tournament Overvaal Ope Jul 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-22	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Mothakama, M (Morwesi)				Opponent Myburgh, A (Amy)
2	3	Tournament GDE (D7) Sedibeng East Schools 2025				Tournament GDE (D7) Sedibeng East Schools 2025
		date 2025-08-02	rnd 1	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Honalline, L (Lamitro)				Opponent Mogorosi, P (Pako)
3	3	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-18	rnd 2	type Standard	result 1	date 2023-08-18	rnd 4	type Standard	result 1
		Opponent Tshibamba, J (Jael)				Opponent Pieters, I (Imrich)

#	Games	Start				End
1	2	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 2	type Rapid	result 1	date 2024-07-13	rnd 3	type Rapid	result 1
		Opponent Smit, L (Liane)				Opponent Myburgh, V (Vaughn)
2	1	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 5	type Rapid	result 1	date 2024-07-13	rnd 5	type Rapid	result 1
		Opponent Van Rensburg, H (Hanno)				Opponent Van Rensburg, H (Hanno)
3	1	Tournament Dr Pieter Hangelbroek Rapid 2023				Tournament Dr Pieter Hangelbroek Rapid 2023
		date 2023-10-28	rnd 4	type Rapid	result 1	date 2023-10-28	rnd 4	type Rapid	result 1
		Opponent Jonker, C (Corne)				Opponent Jonker, C (Corne)

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 Der Merwe ,W (Willem)	4	1.5	-106.2	3	1	-141.7	1	0.5	0	0	0	0
1	Van Der Merwe ,W (Willem)	4	1294.2	1187.9	3	1285.5	1152.5	1	1200	1294.2	0	0	0
2	Smit ,L (Liane)	3	2	141.7	2	1	0	1	1	425	0	0	0
2	Smit ,L (Liane)	3	1143.7	1285.4	2	1101.6	1143.7	1	1160.8	1568.7	0	0	0
3	van der Walt ,K (Kiera)	3	0	-425	2	0	-425	1	0	-425	0	0	0
3	van der Walt ,K (Kiera)	3	1269.1	844.1	2	1235.2	844.1	1	1200	844.1	0	0	0
4	Mogorosi ,P (Pako)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Mogorosi ,P (Pako)	2	1289.2	1501.8	2	1282.9	1501.8	0	0	0	0	0	0
5	Myburgh ,A (Alex)	2	2	425	2	2	425	0	0	0	0	0	0
5	Myburgh ,A (Alex)	2	1156.3	1581.3	2	1145.3	1581.3	0	0	0	0	0	0
6	Hutcheson ,JL (Justin Luke)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Hutcheson ,JL (Justin Luke)	2	1176.3	751.3	2	1172.4	751.3	0	0	0	0	0	0
7	Sampson ,C (Cadon)	2	1	0	2	1	0	0	0	0	0	0	0
7	Sampson ,C (Cadon)	2	1326.8	1326.8	2	1320.2	1326.8	0	0	0	0	0	0
8	Motloung ,I (Israel)	2	0	-425	1	0	-425	1	0	-425	0	0	0
8	Motloung ,I (Israel)	2	1317.7	892.7	1	1336.9	892.7	1	1255.4	892.7	0	0	0
9	Brand ,H (Henko)	2	0	-425	1	0	-425	1	0	-425	0	0	0
9	Brand ,H (Henko)	2	1483.3	1058.3	1	1461.7	1058.3	1	1344.8	1058.3	0	0	0
10	Viljoen ,S (Shenique)	2	1	0	1	0	-425	1	1	425	0	0	0
10	Viljoen ,S (Shenique)	2	1268.4	1268.4	1	1280.6	843.4	1	1200	1693.4	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

De Jager, K (Kobus)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms