Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jonker, R (Reagan)

Chess SA id

1110115390

FIDE id

Date of birth

2011-12-08 (U16)

Gender

Male

Region

West Rand (GWR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-12-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1330.6	1320.8	1034.2	1200
Raw rating	1330.6	1320.8	1034.2	1200
Weighted rating	1325.8	1317.4	1034.2	1200
Weighted performance	1206.2	1207	0	0
Floor	884.5	882.4	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	137.7	139.6	210	165.8
Highest rating	1399.5 2024-07-01	1397.4 2024-07-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1384.5 2024-08-01	1382.4 2024-08-01	1200 2018-02-01	1200 2024-02-01
Highest weighted rating	1324.6 2025-08-01	1382.4 2024-01-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1399.5 2024-07-01	1397.4 2024-07-01	1200 2018-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1330.6	1320.8	1034.2	1200
Analysis
Rating	1330.6	1320.8	1034.2	1200
Raw rating	1330.6	1320.8	1034.2	1200
Weighted rating	1325.8	1317.4	1034.2
Weighted performance	1206.2	1207	0
K-factor	36	36	36	36
Floor	884.5	882.4	700	700
Max/Min rating change allowed	137.7	139.6	210	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	1330.6	1320.8	1034.2	1200
New weighted rating	1326.5	1317.8	1034.2	1200
New weighted performance	1205.7	1206.5	0	0
Temp new rating	1330.6	1320.8	1034.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1330.6	1320.8	1034.2	1200
New K-factor	36	36	36	36
New floor	884.5	882.4	700	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	46	46	0
	40	40	0
	31	31	0
	0	0	0
History	122	117	5

Games since
	Main 46	Standard 46		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	West Rand (GWR)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2878		972		84
Male	2298		774		65
U16	454		152		9
U16 Male	339		110		4
Standard
	RSA		Province		Region
Overall	2871		1038		103
Male	2286		829		80
U16	460		162		10
U16 Male	345		119		5
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	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	122	67	54.92	41.8	1247.8	1289.6
Standard	117	67	57.26	61.8	1251	1312.8
Rapid	5	0	0	-425	1172.5	747.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1330.6	1320.8	1034.2	1200
2025-09-01	1330.6	1320.8	1034.2	1200
2025-08-01	1330.6	1320.8	1034.2	1200
2025-07-01	1330.6	1320.8	1034.2	1200
2025-06-01	1330.6	1320.8	1034.2	1200
2025-05-01	1330.6	1320.8	1034.2	1200
2025-04-01	1330.6	1320.8	1034.2	1200
2025-03-01	1330.6	1320.8	1034.2	1200
2025-02-01	1330.6	1320.8	1034.2	1200
2025-01-01	1330.6	1320.8	1034.2	1200
2024-12-01	1311.6	1297.4	1034.2	1200
2024-11-01	1311.6	1297.4	1034.2	1200
2024-10-01	1332.5	1320.8	1034.2	1200
2024-09-01	1332.5	1320.8	1034.2	1200
2024-08-01	1384.5	1382.4	1034.2	1200
2024-07-01	1304.2	1307.8	1034.2	1200
2024-06-01	1309	1316.1	1034.2	1200
2024-08-01	1283.3	1282.6	1034.2	1200
2024-04-01	1277.9	1276.8	1034.2	1200
2024-03-01	1273.7	1272.1	1034.2	1200
2024-02-01	1267.4	1266.3	1034.2	1200
2024-01-01	1344.6	1346.6	1034.2	1200
2023-12-01	1344.6	1346.6	1034.2	1200
2023-11-01	1344.6	1346.6	1034.2	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	Gauteng Inter-Region at UJ 2024 (U14 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	4	3	Yes	Analysis
2	Gauteng Top Schools 2024 (U13 Open)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
3	2024 West Rand Rappies Open (Rooks)	2024-08-03	2024-08-03	Standard	West Rand (GWR)	5	3	0	Yes	Analysis
4	D2 School League Finals 2024 (U13)	2024-07-20	2024-07-20	Standard	West Rand (GWR)	5	5	4.5	Yes	Analysis
5	FIDE in the West 2024 (Rooks)	2024-06-08	2024-06-08	Standard	West Rand (GWR)	5	4	2	Yes	Analysis
6	2024 D2 Schools Individuals (U13 Boys)	2024-05-04	2024-05-04	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
7	2024 West Rand RHS Open (Rooks)	2024-04-13	2024-04-13	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
8	2024 West Rand Juniors (U14)	2024-03-09	2024-03-09	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
9	2024 West Rand Open (U14)	2024-02-03	2024-02-03	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
10	2024 Gauteng Inter-Region Chess Championship (U14B)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	0	Yes	Analysis
11	2023 West Rand Trials (U14)	2023-09-09	2023-09-09	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
12	West Rand at Bastion 2023 (Rooks)	2023-08-05	2023-08-05	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
13	D2 School League Finals 2023 (U13)	2023-07-22	2023-07-22	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
14	2023 West Rand RHS Open (Rooks)	2023-06-10	2023-06-10	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
15	D2 Schools Individuals 2023 (U13 Boys)	2023-05-13	2023-05-13	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
16	West Rand Juniors 2023 (U14)	2023-03-18	2023-03-18	Standard	West Rand (GWR)	5	5	3.5	Yes	Analysis
17	WR Tournament and Coaching 2023 (U14)	2023-02-25	2023-02-25	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
18	2023 West Rand Open (U14)	2023-02-04	2023-02-04	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
19	West Rand vs Bojanala 2022 (U12B)	2022-11-05	2022-11-05	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
20	West Rand Trials 2022 (U12)	2022-09-03	2022-09-03	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
21	D2 School League Finals 2022 (U11)	2022-08-20	2022-08-20	Standard	West Rand (GWR)	6	6	6	Yes	Analysis
22	2nd West Rand Open 2022 (Juniors)	2022-08-06	2022-08-06	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
23	2022 Gauteng Schools Team Championships (U11 Open)	2022-08-27	2022-08-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
24	D2 Schools Individuals 2022 (U11 Boys)	2022-05-07	2022-05-07	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
25	2019 SWVG Arnold Classic (Rapid Open)	2019-05-18	2019-05-19	Rapid	Tshwane (GTP)	10	5	0	Yes	Analysis

#	Games	Start				End
1	7	Tournament 2nd West Rand Open 2022				Tournament D2 School League Finals 2022
		date 2022-08-06	rnd 5	type Standard	result 1	date 2022-08-20	rnd 6	type Standard	result 1
		Opponent Sardinha, K (Keanu)				Opponent Magagula, N (Nkosingiphile)
2	6	Tournament FIDE in the West 2024				Tournament D2 School League Finals 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-07-20	rnd 5	type Standard	result 0.5
		Opponent Myburgh, B (Braydan)				Opponent Monaheng, O (Ofentse)
3	5	Tournament 2024 D2 Schools Individuals				Tournament 2024 D2 Schools Individuals
		date 2024-05-04	rnd 1	type Standard	result 1	date 2024-05-04	rnd 5	type Standard	result 1
		Opponent Hlungwani, P (Prince)				Opponent Niemer, T (Theo)

#	Games	Start				End
1	7	Tournament 2nd West Rand Open 2022				Tournament D2 School League Finals 2022
		date 2022-08-06	rnd 5	type Standard	result 1	date 2022-08-20	rnd 6	type Standard	result 1
		Opponent Sardinha, K (Keanu)				Opponent Magagula, N (Nkosingiphile)
2	6	Tournament FIDE in the West 2024				Tournament D2 School League Finals 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-07-20	rnd 5	type Standard	result 0.5
		Opponent Myburgh, B (Braydan)				Opponent Monaheng, O (Ofentse)
3	5	Tournament 2024 D2 Schools Individuals				Tournament 2024 D2 Schools Individuals
		date 2024-05-04	rnd 1	type Standard	result 1	date 2024-05-04	rnd 5	type Standard	result 1
		Opponent Hlungwani, P (Prince)				Opponent Niemer, T (Theo)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament 2nd West Rand Open 2022				Tournament D2 School League Finals 2022
		date 2022-08-06	rnd 5	type Standard	result 1	date 2022-08-20	rnd 6	type Standard	result 1
		Opponent Sardinha, K (Keanu)				Opponent Magagula, N (Nkosingiphile)
2	5	Tournament FIDE in the West 2024				Tournament D2 School League Finals 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-07-20	rnd 4	type Standard	result 1
		Opponent Myburgh, B (Braydan)				Opponent Phetu, N (Nompumelelo)
3	5	Tournament West Rand Trials 2022				Tournament West Rand vs Bojanala 2022
		date 2022-09-03	rnd 3	type Standard	result 1	date 2022-11-05	rnd 2	type Standard	result 1
		Opponent Fumbatha, T (Thandulwazi)				Opponent Barnard, A (Anjanka)

#	Games	Start				End
1	7	Tournament 2nd West Rand Open 2022				Tournament D2 School League Finals 2022
		date 2022-08-06	rnd 5	type Standard	result 1	date 2022-08-20	rnd 6	type Standard	result 1
		Opponent Sardinha, K (Keanu)				Opponent Magagula, N (Nkosingiphile)
2	5	Tournament FIDE in the West 2024				Tournament D2 School League Finals 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-07-20	rnd 4	type Standard	result 1
		Opponent Myburgh, B (Braydan)				Opponent Phetu, N (Nompumelelo)
3	5	Tournament West Rand Trials 2022				Tournament West Rand vs Bojanala 2022
		date 2022-09-03	rnd 3	type Standard	result 1	date 2022-11-05	rnd 2	type Standard	result 1
		Opponent Fumbatha, T (Thandulwazi)				Opponent Barnard, A (Anjanka)

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	Kalimashe ,T (Tshireletso)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
1	Kalimashe ,T (Tshireletso)	4	1454.2	1241.7	4	1455.6	1241.7	0	0	0	0	0	0
2	Roos ,S (Shani)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
2	Roos ,S (Shani)	3	1385	1243.3	3	1377.3	1243.3	0	0	0	0	0	0
3	Magagula ,N (Nkosingiphile)	3	3	425	3	3	425	0	0	0	0	0	0
3	Magagula ,N (Nkosingiphile)	3	1331.9	1756.9	3	1336.3	1756.9	0	0	0	0	0	0
4	Du Plessis ,D (Dotynian)	2	2	425	2	2	425	0	0	0	0	0	0
4	Du Plessis ,D (Dotynian)	2	1212.6	1637.6	2	1206.4	1637.6	0	0	0	0	0	0
5	Coetzee ,K (Kairi)	2	2	425	2	2	425	0	0	0	0	0	0
5	Coetzee ,K (Kairi)	2	1200	1625	2	1200	1625	0	0	0	0	0	0
6	Oosthuizen ,R (Ruwan)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Oosthuizen ,R (Ruwan)	2	1276.2	851.2	2	1289.1	851.2	0	0	0	0	0	0
7	Fourie ,C (Caitlin)	2	1	0	2	1	0	0	0	0	0	0	0
7	Fourie ,C (Caitlin)	2	1168.8	1168.8	2	1165.2	1168.8	0	0	0	0	0	0
8	Esterhuizen ,Z (Zane)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Esterhuizen ,Z (Zane)	2	1371.8	946.8	2	1377.1	946.8	0	0	0	0	0	0
9	Labuschagne ,Q (Quinten)	2	2	425	2	2	425	0	0	0	0	0	0
9	Labuschagne ,Q (Quinten)	2	1186.8	1611.8	2	1185.1	1611.8	0	0	0	0	0	0
10	Phetu ,N (Nompumelelo)	2	1	0	2	1	0	0	0	0	0	0	0
10	Phetu ,N (Nompumelelo)	2	1407.7	1407.7	2	1404.9	1407.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Jonker, R (Reagan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms