Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koen, A (Andrea)

Chess SA id

201047585

FIDE id

Date of birth

2001-06-15 (Adult)

Gender

Female

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2019-07-20

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1027.1	1018.8	1200	1200
Raw rating	1027.1	1018.8	1200	1200
Weighted rating	1027.1	1018.8	1200	1200
Weighted performance	216.8	215.1	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	212.1	214.7	165.8	165.8
Highest rating	1200 2024-11-01	1200 2024-11-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1200 2018-01-01	1200 2018-01-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1200 2024-11-01	1200 2024-11-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1027.1	1018.8	1200	1200
Analysis
Rating	1027.1	1018.8	1200	1200
Raw rating	1027.1	1018.8	1200	1200
Weighted rating	1027.1	1018.8	1200
Weighted performance	216.8	215.1	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	212.1	214.7	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	1027.1	1018.8	1200	1200
New weighted rating	1027.1	1018.8	1200	1200
New weighted performance	216.5	214.7	0	0
Temp new rating	1027.1	1018.8	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1027.1	1018.8	1200	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	83	78	5

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	Adult
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult 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	73	27.5	37.67	-104.8	1037.1	932.3
Standard	73	27.5	37.67	-104.8	1037.1	932.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1027.1	1018.8	1200	1200
2025-09-01	1027.1	1018.8	1200	1200
2025-08-01	1027.1	1018.8	1200	1200
2025-07-01	1027.1	1018.8	1200	1200
2025-06-01	1027.1	1018.8	1200	1200
2025-05-01	1027.1	1018.8	1200	1200
2025-04-01	1027.1	1018.8	1200	1200
2025-03-01	1027.1	1018.8	1200	1200
2025-02-01	1027.1	1018.8	1200	1200
2025-01-01	1027.1	1018.8	1200	1200
2024-12-01	1027.1	1018.8	1200	1200
2024-11-01	1027.1	1018.8	1200	1200
2024-10-01	1027.1	1018.8	1200	1200
2024-09-01	1027.1	1018.8	1200	1200
2024-08-01	1027.1	1018.8	1200	1200
2024-07-01	1027.1	1018.8	1200	1200
2024-06-01	1027.1	1018.8	1200	1200
2024-08-01	1027.1	1018.8	1200	1200
2024-04-01	1027.1	1018.8	1200	1200
2024-03-01	1027.1	1018.8	1200	1200
2024-02-01	1027.1	1018.8	1200	1200
2024-01-01	1027.1	1018.8	1200	1200
2023-12-01	1027.1	1018.8	1200	1200
2023-11-01	1027.1	1018.8	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	Eden Top Schools 2019 (U18)	2019-07-20	2019-07-20	Standard	Eden (WEG)	5	4	3	Yes	Analysis
2	Eden Trials 3 2019 (U20 Open)	2019-05-11	2019-05-11	Standard	Eden (WEG)	5	4	0	Yes	Analysis
3	Western Cape Schools Individuals 2019 (U18 Girls)	2019-05-04	2019-05-05	Standard	Eden (WEG)	6	6	2	Yes	Analysis
4	Eden Trials 2 2019 (U20 Open)	2019-04-13	2019-04-13	Standard	Eden (WEG)	5	5	2.5	Yes	Analysis
5	Eden Trials 1 2019 (U20 Open)	2019-03-02	2019-03-02	Standard	Eden (WEG)	5	5	2	Yes	Analysis
6	George Trials 3 2019 (U20)	2019-02-23	2019-02-23	Standard	Eden (WEG)	5	5	2.5	Yes	Analysis
7	George Trials 2 2019 (U20)	2019-02-09	2019-02-09	Standard	Eden (WEG)	5	4	1.5	Yes	Analysis
8	George Trials 1 2019 (U20)	2019-01-26	2019-01-26	Standard	Eden (WEG)	5	4	2	Yes	Analysis
9	South African Junior Team Championships 2018 (U20B)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	0	Yes	Analysis
10	Eden Top Schools 2018 (U19 Mix)	2018-07-28	2018-07-28	Standard	Eden (WEG)	5	1	1	Yes	Analysis
11	EDENSC Closed 3 2018 (U18 Open)	2018-05-12	2018-05-12	Standard	Eden (WEG)	5	5	2	Yes	Analysis
12	EDENSC Closed 2 2018 (U18 (Open)	2018-04-14	2018-04-14	Standard	Eden (WEG)	5	5	1	Yes	Analysis
13	EDENSC Closed 1 2018 (U18)	2018-03-10	2018-03-10	Standard	Eden (WEG)	5	4	2	Yes	Analysis
14	George Trails 3 2018 (U18)	2018-02-24	2018-02-24	Standard	Eden (WEG)	5	4	1	Yes	Analysis
15	George Trails 2 2018 (U18)	2018-02-10	2018-02-10	Standard	Eden (WEG)	5	5	2	Yes	Analysis
16	George Trails 1 2018 (U18)	2018-01-27	2018-01-27	Standard	Eden (WEG)	5	5	3	Yes	Analysis

#	Games	Start				End
1	3	Tournament George Trails 1 2018				Tournament George Trails 2 2018
		date 2018-01-27	rnd 4	type Standard	result 1	date 2018-02-10	rnd 1	type Standard	result 1
		Opponent Cato, N (Nicholas)				Opponent Swartz, L (Logan)
2	2	Tournament Eden Top Schools 2019				Tournament Eden Top Schools 2019
		date 2019-07-20	rnd 4	type Standard	result 1	date 2019-07-20	rnd 5	type Standard	result 1
		Opponent Januarie, N (Nevan)				Opponent Opperman, E (Eltiono)
3	2	Tournament Eden Trials 2 2019				Tournament Eden Trials 2 2019
		date 2019-04-13	rnd 4	type Standard	result 1	date 2019-04-13	rnd 5	type Standard	result 0.5
		Opponent Holton , B (Brendon)				Opponent Campbell, A (Anje)

#	Games	Start				End
1	3	Tournament George Trails 1 2018				Tournament George Trails 2 2018
		date 2018-01-27	rnd 4	type Standard	result 1	date 2018-02-10	rnd 1	type Standard	result 1
		Opponent Cato, N (Nicholas)				Opponent Swartz, L (Logan)
2	2	Tournament Eden Top Schools 2019				Tournament Eden Top Schools 2019
		date 2019-07-20	rnd 4	type Standard	result 1	date 2019-07-20	rnd 5	type Standard	result 1
		Opponent Januarie, N (Nevan)				Opponent Opperman, E (Eltiono)
3	2	Tournament Eden Trials 2 2019				Tournament Eden Trials 2 2019
		date 2019-04-13	rnd 4	type Standard	result 1	date 2019-04-13	rnd 5	type Standard	result 0.5
		Opponent Holton , B (Brendon)				Opponent Campbell, A (Anje)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament George Trails 1 2018				Tournament George Trails 2 2018
		date 2018-01-27	rnd 4	type Standard	result 1	date 2018-02-10	rnd 1	type Standard	result 1
		Opponent Cato, N (Nicholas)				Opponent Swartz, L (Logan)
2	2	Tournament Eden Top Schools 2019				Tournament Eden Top Schools 2019
		date 2019-07-20	rnd 4	type Standard	result 1	date 2019-07-20	rnd 5	type Standard	result 1
		Opponent Januarie, N (Nevan)				Opponent Opperman, E (Eltiono)
3	2	Tournament Eden Trials 1 2019				Tournament Eden Trials 1 2019
		date 2019-03-02	rnd 4	type Standard	result 1	date 2019-03-02	rnd 5	type Standard	result 1
		Opponent Holton , B (Brendon)				Opponent Neewath, P (Pehandry)

#	Games	Start				End
1	3	Tournament George Trails 1 2018				Tournament George Trails 2 2018
		date 2018-01-27	rnd 4	type Standard	result 1	date 2018-02-10	rnd 1	type Standard	result 1
		Opponent Cato, N (Nicholas)				Opponent Swartz, L (Logan)
2	2	Tournament Eden Top Schools 2019				Tournament Eden Top Schools 2019
		date 2019-07-20	rnd 4	type Standard	result 1	date 2019-07-20	rnd 5	type Standard	result 1
		Opponent Januarie, N (Nevan)				Opponent Opperman, E (Eltiono)
3	2	Tournament Eden Trials 1 2019				Tournament Eden Trials 1 2019
		date 2019-03-02	rnd 4	type Standard	result 1	date 2019-03-02	rnd 5	type Standard	result 1
		Opponent Holton , B (Brendon)				Opponent Neewath, P (Pehandry)

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	Campbell ,A (Anje)	5	3	85	5	3	85	0	0	0	0	0	0
1	Campbell ,A (Anje)	5	1003	1088	5	1003.1	1088	0	0	0	0	0	0
2	Gilbert ,C (Cheslyn)	4	0	-425	4	0	-425	0	0	0	0	0	0
2	Gilbert ,C (Cheslyn)	4	1156.8	731.8	4	1160.9	731.8	0	0	0	0	0	0
3	Rhode ,J (Jadrique)	4	0.5	-318.8	4	0.5	-318.8	0	0	0	0	0	0
3	Rhode ,J (Jadrique)	4	1137.4	818.7	4	1142.6	818.7	0	0	0	0	0	0
4	Holton ,B (Brendon)	4	4	425	4	4	425	0	0	0	0	0	0
4	Holton ,B (Brendon)	4	1069.6	1494.6	4	1044.7	1494.6	0	0	0	0	0	0
5	Swartz ,L (Logan)	3	3	425	3	3	425	0	0	0	0	0	0
5	Swartz ,L (Logan)	3	1019.1	1444.1	3	985.6	1444.1	0	0	0	0	0	0
6	Koopman ,J (Jaydim)	2	1	0	2	1	0	0	0	0	0	0	0
6	Koopman ,J (Jaydim)	2	1169.4	1169.4	2	1163.2	1169.4	0	0	0	0	0	0
7	Oktober ,J (Jayson)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Oktober ,J (Jayson)	2	968.6	543.6	2	977.8	543.6	0	0	0	0	0	0
8	Nyirenda ,V (Vitumbiko)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Nyirenda ,V (Vitumbiko)	2	881.1	456.1	2	899.2	456.1	0	0	0	0	0	0
9	Pietersen ,M (Marlon)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Pietersen ,M (Marlon)	2	1180.4	755.4	2	1193.4	755.4	0	0	0	0	0	0
10	Stephanus ,M (Melissa)	2	1	0	2	1	0	0	0	0	0	0	0
10	Stephanus ,M (Melissa)	2	1040.8	1040.8	2	1041.6	1040.8	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

Koen, A (Andrea)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms