Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Merwe, J (Janka)

Chess SA id

2120108356

FIDE id

Date of birth

2012-09-18 (U14)

Gender

Female

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-02-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	816	790.8	1200	1200
Raw rating	816	790.8	1200	1200
Weighted rating	816	790.8	1200	1200
Weighted performance	197.6	194.8	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	286.6	297	165.8	165.8
Highest rating	1210.3 2019-01-01	1210.3 2019-01-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1200 2018-02-01	1200 2018-02-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1210.3 2019-01-01	1210.3 2019-01-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	816	790.8	1200	1200
Analysis
Rating	816	790.8	1200	1200
Raw rating	816	790.8	1200	1200
Weighted rating	816	790.8	1200
Weighted performance	197.6	194.8	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	286.6	297	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	816	790.8	1200	1200
New weighted rating	816	790.8	1200	1200
New weighted performance	193.3	190.5	0	0
Temp new rating	816	790.8	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	816	790.8	1200	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard
	0	0
	0	0
	0	0
	0	0
	0	0
	0	0
History	39	39

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	U14
Region	Tshwane (GTP)
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	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	39	3	7.69	-359.6	1163.2	803.5
Standard	39	3	7.69	-359.6	1163.2	803.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	816	790.8	1200	1200
2025-09-30	816	790.8	1200	1200
2025-09-01	816	790.8	1200	1200
2025-08-01	816	790.8	1200	1200
2025-07-01	816	790.8	1200	1200
2025-06-01	816	790.8	1200	1200
2025-05-01	816	790.8	1200	1200
2025-04-01	816	790.8	1200	1200
2025-03-01	816	790.8	1200	1200
2025-02-01	816	790.8	1200	1200
2025-01-01	816	790.8	1200	1200
2024-12-01	816	790.8	1200	1200
2024-11-01	816	790.8	1200	1200
2024-10-01	816	790.8	1200	1200
2024-09-01	816	790.8	1200	1200
2024-08-01	816	790.8	1200	1200
2024-07-01	816	790.8	1200	1200
2024-09-01	816	790.8	1200	1200
2024-05-01	816	790.8	1200	1200
2024-04-01	816	790.8	1200	1200
2024-03-01	816	790.8	1200	1200
2024-02-01	816	790.8	1200	1200
2024-01-01	816	790.8	1200	1200
2023-12-01	816	790.8	1200	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	2020 Constantiapark Open Chess Tournament (E)	2020-02-08	2020-02-08	Standard	Tshwane (GTP)	5	4	0	Yes	Analysis
2	2020 Registration Tournament (D)	2020-01-25	2020-01-25	Standard	Tshwane (GTP)	5	5	0	Yes	Analysis
3	2019 South African Junior Team Championships (U8B+U8Girls)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	0	Yes	Analysis
4	2019 TC SAJCC Prep Tournament (C)	2019-11-30	2019-11-30	Standard	Tshwane (GTP)	5	3	0	Yes	Analysis
5	2019 Etienne Lewis Trials (U8 Girls)	2019-08-30	2019-09-01	Standard	Tshwane (GTP)	7	7	0	Yes	Analysis
6	2019 D4 Individual Finals (U9 Girls)	2019-03-09	2019-03-09	Standard	Tshwane (GTP)	5	5	0.5	Yes	Analysis
7	2019 Constantia Park Open (E)	2019-02-09	2019-02-09	Standard	Tshwane (GTP)	5	4	0	Yes	Analysis
8	2019 Tshwane Chess Registration Tournament (F)	2019-01-26	2019-01-26	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis

#	Games	Start				End
1	2	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 2	type Standard	result 0.5	date 2019-01-26	rnd 3	type Standard	result 1
		Opponent Liang, Y (Yi Qiao (Joe))				Opponent Sathish, A (Aarya)
2	1	Tournament 2019 D4 Individual Finals				Tournament 2019 D4 Individual Finals
		date 2019-03-09	rnd 3	type Standard	result 0.5	date 2019-03-09	rnd 3	type Standard	result 0.5
		Opponent Janse Van Rensburg, M (Maria)				Opponent Janse Van Rensburg, M (Maria)
3	1	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 5	type Standard	result 1	date 2019-01-26	rnd 5	type Standard	result 1
		Opponent Bhudai, M (Milan)				Opponent Bhudai, M (Milan)

#	Games	Start				End
1	2	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 2	type Standard	result 0.5	date 2019-01-26	rnd 3	type Standard	result 1
		Opponent Liang, Y (Yi Qiao (Joe))				Opponent Sathish, A (Aarya)
2	1	Tournament 2019 D4 Individual Finals				Tournament 2019 D4 Individual Finals
		date 2019-03-09	rnd 3	type Standard	result 0.5	date 2019-03-09	rnd 3	type Standard	result 0.5
		Opponent Janse Van Rensburg, M (Maria)				Opponent Janse Van Rensburg, M (Maria)
3	1	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 5	type Standard	result 1	date 2019-01-26	rnd 5	type Standard	result 1
		Opponent Bhudai, M (Milan)				Opponent Bhudai, M (Milan)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 5	type Standard	result 1	date 2019-01-26	rnd 5	type Standard	result 1
		Opponent Bhudai, M (Milan)				Opponent Bhudai, M (Milan)
2	1	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 3	type Standard	result 1	date 2019-01-26	rnd 3	type Standard	result 1
		Opponent Sathish, A (Aarya)				Opponent Sathish, A (Aarya)

#	Games	Start				End
1	1	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 5	type Standard	result 1	date 2019-01-26	rnd 5	type Standard	result 1
		Opponent Bhudai, M (Milan)				Opponent Bhudai, M (Milan)
2	1	Tournament 2019 Tshwane Chess Registration Tournament				Tournament 2019 Tshwane Chess Registration Tournament
		date 2019-01-26	rnd 3	type Standard	result 1	date 2019-01-26	rnd 3	type Standard	result 1
		Opponent Sathish, A (Aarya)				Opponent Sathish, A (Aarya)

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	Yang ,S (Selina)	3	0	-425	3	0	-425	0	0	0	0	0	0
1	Yang ,S (Selina)	3	1159	734	3	1143	734	0	0	0	0	0	0
2	De Swardt ,M (Mieke)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	De Swardt ,M (Mieke)	2	1228.3	803.3	2	1226.4	803.3	0	0	0	0	0	0
3	Bhudai ,M (Milan)	2	1	0	2	1	0	0	0	0	0	0	0
3	Bhudai ,M (Milan)	2	1147.1	1147.1	2	1136.6	1147.1	0	0	0	0	0	0
4	Jordaan ,H (Hailey)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Jordaan ,H (Hailey)	1	1200	775	1	1200	775	0	0	0	0	0	0
5	Grahan ,T (Tylo)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Grahan ,T (Tylo)	1	1168.4	743.4	1	1167.6	743.4	0	0	0	0	0	0
6	Malan ,R (Ruhan)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Malan ,R (Ruhan)	1	1200	775	1	1200	775	0	0	0	0	0	0
7	De Kock ,L (Lana)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	De Kock ,L (Lana)	1	1204.7	779.7	1	1207.2	779.7	0	0	0	0	0	0
8	Liang ,Y (Yi Qiao (Joe))	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Liang ,Y (Yi Qiao (Joe))	1	1200	1200	1	1200	1200	0	0	0	0	0	0
9	De Klerk ,A (Antonie)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	De Klerk ,A (Antonie)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Jacobs ,I (Inge)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Jacobs ,I (Inge)	1	1020.7	595.7	1	1016.9	595.7	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 Der Merwe, J (Janka)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms