Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jonker, J (Jolene)

Chess SA id

2120317450

FIDE id

Date of birth

2012-02-02 (U14)

Gender

Female

Region

West Rand (GWR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-29

Personal details last changed

1900-01-01

Junior GPX Games

20.8

Junior GPX Points

1104.1

Item	Main	Standard	Rapid	Blitz
Rating	1212.9	1215.1	1202.2	1200
Raw rating	1212.1	1210.3	1202.2	1200
Weighted rating	1212.9	1215.1	1201.2	1200
Weighted performance	1140.9	0	0	0
Floor	755.2	766.5	702.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	163	163.4	165.3	165.8
Highest rating	1255.2 2025-08-01	1266.5 2025-08-01	1202.2 2025-04-01	1200 2025-04-01
Highest raw rating	1255.2 2025-08-01	1266.5 2025-08-01	1202.2 2025-04-01	1200 2025-04-01
Highest weighted rating	1212.9 2025-11-01	1215.1 2025-11-01	1200.8 2025-08-01	1200 2025-04-01
Highest weighted performance	1140.9 2025-11-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.4	0.1	0	0
New rating	1213.2	1215.2	1202.2	1200
Analysis
Rating	1212.9	1215.1	1202.2	1200
Raw rating	1212.1	1210.3	1202.2	1200
Weighted rating	1212.9	1215.1	1201.2
Weighted performance	1140.9	0	0
K-factor	36	36	36	36
Floor	755.2	766.5	702.2	700
Max/Min rating change allowed	163	163.4	165.3	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	1212.1	1210.3	1202.2	1200
New weighted rating	1213.2	1215.2	1201.3	1200
New weighted performance	1133.9	0	0	0
Temp new rating	1213.2	1215.2	1202.2	1200
Temp new rating +/-	0.4	0.1	0	0
Final new rating +/-	0.4	0.1	0	0
New rating	1213.2	1215.2	1202.2	1200
New K-factor	36	36	36	36
New floor	755.2	766.5	702.2	700

Item	Main	Standard	Rapid
	0	0	0
	26	19	7
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	26	19	7

Games since
	Main 26	Standard 19		Rapid 7		Blitz 0
Gender	Female
Age group	U14
Region	West Rand (GWR)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-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	26	11.5	44.23	-49	1235.8	1186.8
Standard	19	8	42.11	-67.1	1230.1	1163
Rapid	7	3.5	50	0	1251.4	1251.4
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	26	11.5	44.23	-49	1235.8	1186.8
Standard	19	8	42.11	-67.1	1230.1	1163
Rapid	7	3.5	50	0	1251.4	1251.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1212.1	1210.3	1202.2	1200
2025-09-30	1255.2	1266.5	1202.2	1200
2025-09-01	1255.2	1266.5	1202.2	1200
2025-08-01	1255.2	1266.5	1202.2	1200
2025-07-01	1199.7	1199.5	1202.2	1200
2025-06-01	1199.5	1199.3	1202.2	1200
2025-05-01	1199.5	1199.3	1202.2	1200
2025-04-01	1197	1195.7	1202.2	1200
2025-03-01	1200	1200	1200	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	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 Gauteng Top Schools Teams (U13 Girls)	2025-08-29	2025-08-29	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
2	2025 D2 Schools League Finals (U13 Girls)	2025-07-26	2025-07-26	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
3	2025 D2 Schools Individuals (U13 Girls)	2025-05-09	2025-05-09	Standard	West Rand (GWR)	5	4	2	Yes	Analysis
4	Uni-Mates Chess Fundraiser Tournament 2025 (Bishops)	2025-03-22	2025-03-22	Rapid	West Rand (GWR)	7	7	3.5	Yes	Analysis
5	West Rand Juniors 2025 (U14)	2025-03-08	2025-03-08	Standard	West Rand (GWR)	5	5	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Gauteng Top Schools Teams (U13 Girls)	2025-08-29	2025-08-29	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
2	2025 D2 Schools League Finals (U13 Girls)	2025-07-26	2025-07-26	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
3	2025 D2 Schools Individuals (U13 Girls)	2025-05-09	2025-05-09	Standard	West Rand (GWR)	5	4	2	Yes	Analysis
4	Uni-Mates Chess Fundraiser Tournament 2025 (Bishops)	2025-03-22	2025-03-22	Rapid	West Rand (GWR)	7	7	3.5	Yes	Analysis
5	West Rand Juniors 2025 (U14)	2025-03-08	2025-03-08	Standard	West Rand (GWR)	5	5	1	Yes	Analysis

#	Games	Start				End
1	4	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 1	type Standard	result 1	date 2025-07-26	rnd 4	type Standard	result 1
		Opponent Keister, T (Tshiamo)				Opponent Nel, I (Imke)
2	3	Tournament Uni-Mates Chess Fundraiser Tournament 2025				Tournament Uni-Mates Chess Fundraiser Tournament 2025
		date 2025-03-22	rnd 1	type Rapid	result 1	date 2025-03-22	rnd 3	type Rapid	result 1
		Opponent Mpoto, I (Inothando)				Opponent Schutte, CB (Christiaan Benjamin)
3	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-09	rnd 2	type Standard	result 1	date 2025-05-09	rnd 3	type Standard	result 1
		Opponent Mokwena, K (Katlego)				Opponent Reddy, T (Tia)

#	Games	Start				End
1	4	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 1	type Standard	result 1	date 2025-07-26	rnd 4	type Standard	result 1
		Opponent Keister, T (Tshiamo)				Opponent Nel, I (Imke)
2	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-09	rnd 2	type Standard	result 1	date 2025-05-09	rnd 3	type Standard	result 1
		Opponent Mokwena, K (Katlego)				Opponent Reddy, T (Tia)
3	1	Tournament West Rand Juniors 2025				Tournament West Rand Juniors 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Maragelo, K (Keatlegile)				Opponent Maragelo, K (Keatlegile)

#	Games	Start				End
1	3	Tournament Uni-Mates Chess Fundraiser Tournament 2025				Tournament Uni-Mates Chess Fundraiser Tournament 2025
		date 2025-03-22	rnd 1	type Rapid	result 1	date 2025-03-22	rnd 3	type Rapid	result 1
		Opponent Mpoto, I (Inothando)				Opponent Schutte, CB (Christiaan Benjamin)
2	1	Tournament Uni-Mates Chess Fundraiser Tournament 2025				Tournament Uni-Mates Chess Fundraiser Tournament 2025
		date 2025-03-22	rnd 5	type Rapid	result 0.5	date 2025-03-22	rnd 5	type Rapid	result 0.5
		Opponent Skosana, O (Ofentse)				Opponent Skosana, O (Ofentse)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 1	type Standard	result 1	date 2025-07-26	rnd 4	type Standard	result 1
		Opponent Keister, T (Tshiamo)				Opponent Nel, I (Imke)
2	3	Tournament Uni-Mates Chess Fundraiser Tournament 2025				Tournament Uni-Mates Chess Fundraiser Tournament 2025
		date 2025-03-22	rnd 1	type Rapid	result 1	date 2025-03-22	rnd 3	type Rapid	result 1
		Opponent Mpoto, I (Inothando)				Opponent Schutte, CB (Christiaan Benjamin)
3	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-09	rnd 2	type Standard	result 1	date 2025-05-09	rnd 3	type Standard	result 1
		Opponent Mokwena, K (Katlego)				Opponent Reddy, T (Tia)

#	Games	Start				End
1	4	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 1	type Standard	result 1	date 2025-07-26	rnd 4	type Standard	result 1
		Opponent Keister, T (Tshiamo)				Opponent Nel, I (Imke)
2	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-09	rnd 2	type Standard	result 1	date 2025-05-09	rnd 3	type Standard	result 1
		Opponent Mokwena, K (Katlego)				Opponent Reddy, T (Tia)
3	1	Tournament West Rand Juniors 2025				Tournament West Rand Juniors 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Maragelo, K (Keatlegile)				Opponent Maragelo, K (Keatlegile)

#	Games	Start				End
1	3	Tournament Uni-Mates Chess Fundraiser Tournament 2025				Tournament Uni-Mates Chess Fundraiser Tournament 2025
		date 2025-03-22	rnd 1	type Rapid	result 1	date 2025-03-22	rnd 3	type Rapid	result 1
		Opponent Mpoto, I (Inothando)				Opponent Schutte, CB (Christiaan Benjamin)

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	Weideman ,J (Joane Mia)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Weideman ,J (Joane Mia)	1	1200	775	1	1198.6	775	0	0	0	0	0	0
2	Van Staden ,J (Jenna)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Van Staden ,J (Jenna)	1	1322	897	1	1313.6	897	0	0	0	0	0	0
3	Cheng ,S (Serena)	1	1	425	1	1	425	0	0	0	0	0	0
3	Cheng ,S (Serena)	1	1270.7	1695.7	1	1199.2	1695.7	0	0	0	0	0	0
4	Le Roux ,L (Lana-May)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Le Roux ,L (Lana-May)	1	1134.2	709.2	1	1116.2	709.2	0	0	0	0	0	0
5	Sithole ,G (Gaopalelwe)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Sithole ,G (Gaopalelwe)	1	1200	775	1	1200	775	0	0	0	0	0	0
6	Mokwena ,K (Katlego)	1	1	425	1	1	425	0	0	0	0	0	0
6	Mokwena ,K (Katlego)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Nel ,I (Imke)	1	1	425	1	1	425	0	0	0	0	0	0
7	Nel ,I (Imke)	1	1232.3	1657.3	1	1237.2	1657.3	0	0	0	0	0	0
8	Reddy ,T (Tia)	1	1	425	1	1	425	0	0	0	0	0	0
8	Reddy ,T (Tia)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Letlhage ,R (Reitumetse)	1	1	425	1	1	425	0	0	0	0	0	0
9	Letlhage ,R (Reitumetse)	1	1195.2	1620.2	1	1194.3	1620.2	0	0	0	0	0	0
10	Fourie ,M (Marius)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Fourie ,M (Marius)	1	1250.5	825.5	1	1261.2	825.5	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

Jonker, J (Jolene)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms