Chess South Africa Ratings Database

PLAYER PAGE

Personal

Cornelissen, I (Isabella)

Chess SA id

2120316619

FIDE id

Date of birth

2012-02-03 (U16)

Gender

Female

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-11-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1192.3	1198.4	1183.8	1200
Raw rating	1188	1194.6	1175	1200
Weighted rating	1192.3	1198.4	1183.8	1200
Weighted performance	0	0	0	0
Floor	699.9	700	699.9	700
K-factor	40	36	40	36
Min/Max rating change allowed	168.7	167.1	171.8	165.8
Highest rating	1199.9 2025-06-01	1200 2025-03-01	1199.9 2025-06-01	1200 2025-03-01
Highest raw rating	1199.9 2025-06-01	1200 2025-03-01	1199.9 2025-06-01	1200 2025-03-01
Highest weighted rating	1199.9 2025-06-01	1200 2025-03-01	1199.9 2025-06-01	1200 2025-03-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.6	-0.4	-1.2	0
New rating	1191.7	1198	1182.6	1200
Analysis
Rating	1192.3	1198.4	1183.8	1200
Raw rating	1188	1194.6	1175	1200
Weighted rating	1192.3	1198.4	1183.8
Weighted performance	0	0	0
K-factor	40	36	40	36
Floor	699.9	700	699.9	700
Max/Min rating change allowed	168.7	167.1	171.8	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	1188	1194.6	1175	1200
New weighted rating	1191.7	1198	1182.6	1200
New weighted performance	0	0	0	0
Temp new rating	1191.7	1198	1182.6	1200
Temp new rating +/-	-0.6	-0.4	-1.2	0
Final new rating +/-	-0.6	-0.4	-1.2	0
New rating	1191.7	1198	1182.6	1200
New K-factor	40	36	40	36
New floor	699.9	700	699.9	700

Item	Main	Standard	Rapid
	0	0	0
	21	5	16
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	21	5	16

Games since
	Main 21	Standard 5		Rapid 16		Blitz 0
Gender	Female
Age group	U14
Region	West Coast (WCU)
Province	Western Cape (WC)
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	21	8.5	40.48	-81	1243.7	1162.7
Standard	5	2	40	-85	1282.1	1197.1
Rapid	16	6.5	40.62	-79.7	1231.7	1152
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	21	8.5	40.48	-81	1243.7	1162.7
Standard	5	2	40	-85	1282.1	1197.1
Rapid	16	6.5	40.62	-79.7	1231.7	1152
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1188	1194.6	1175	1200
2025-11-30	1188	1194.6	1175	1200
2025-11-01	1172.2	1194.6	1141.8	1200
2025-09-30	1172.2	1194.6	1141.8	1200
2025-09-01	1173.8	1200	1141.8	1200
2025-08-01	1199.9	1200	1199.9	1200
2025-07-01	1199.9	1200	1199.9	1200
2025-06-01	1199.9	1200	1199.9	1200
2025-05-01	1199.9	1200	1199.9	1200
2025-04-01	1199.9	1200	1199.9	1200
2025-03-01	1199.3	1200	1199.1	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
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	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

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	West Coast Schools Chess Grand Challenge League 2025 (PS Development)	2025-11-08	2025-11-08	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
2	Western Cape Schools - Top Schools 2025 (U13 Girls)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	2	Yes	Analysis
3	Pedro Booyse Top Schools 2025 (U13 Girls)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	6	6	1.5	Yes	Analysis
4	Lower West Coast Prestige 2025 (U13 Girls)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis

#	Games	Start				End
1	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-07	rnd 5	type Standard	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Gericke, D (Deone)				Opponent Gericke, D (Deone)
2	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-06	rnd 2	type Standard	result 1	date 2025-09-06	rnd 2	type Standard	result 1
		Opponent Saayman, V (Veronique)				Opponent Saayman, V (Veronique)
3	1	Tournament Pedro Booyse Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-23	rnd 6	type Rapid	result 1
		Opponent September, A (Ava-Louise)				Opponent September, A (Ava-Louise)

#	Games	Start				End
1	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-07	rnd 5	type Standard	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Gericke, D (Deone)				Opponent Gericke, D (Deone)
2	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-06	rnd 2	type Standard	result 1	date 2025-09-06	rnd 2	type Standard	result 1
		Opponent Saayman, V (Veronique)				Opponent Saayman, V (Veronique)

#	Games	Start				End
1	1	Tournament Pedro Booyse Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-23	rnd 6	type Rapid	result 1
		Opponent September, A (Ava-Louise)				Opponent September, A (Ava-Louise)
2	1	Tournament Pedro Booyse Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-08-23	rnd 3	type Rapid	result 0.5	date 2025-08-23	rnd 3	type Rapid	result 0.5
		Opponent September, A (Ava-Louise)				Opponent September, A (Ava-Louise)
3	1	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Prestige 2025
		date 2025-02-22	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Swarts, A (Aneska)				Opponent Swarts, A (Aneska)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-07	rnd 5	type Standard	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Gericke, D (Deone)				Opponent Gericke, D (Deone)
2	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-06	rnd 2	type Standard	result 1	date 2025-09-06	rnd 2	type Standard	result 1
		Opponent Saayman, V (Veronique)				Opponent Saayman, V (Veronique)
3	1	Tournament Pedro Booyse Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-23	rnd 6	type Rapid	result 1
		Opponent September, A (Ava-Louise)				Opponent September, A (Ava-Louise)

#	Games	Start				End
1	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-07	rnd 5	type Standard	result 1	date 2025-09-07	rnd 5	type Standard	result 1
		Opponent Gericke, D (Deone)				Opponent Gericke, D (Deone)
2	1	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-06	rnd 2	type Standard	result 1	date 2025-09-06	rnd 2	type Standard	result 1
		Opponent Saayman, V (Veronique)				Opponent Saayman, V (Veronique)

#	Games	Start				End
1	1	Tournament Pedro Booyse Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-23	rnd 6	type Rapid	result 1
		Opponent September, A (Ava-Louise)				Opponent September, A (Ava-Louise)
2	1	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Prestige 2025
		date 2025-02-22	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Swarts, A (Aneska)				Opponent Swarts, A (Aneska)
3	1	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Prestige 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-02-22	rnd 3	type Rapid	result 1
		Opponent Ndbeni, L (Lolwethu)				Opponent Ndbeni, L (Lolwethu)

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	September ,A (Ava-Louise)	2	1.5	212.5	0	0	0	2	1.5	212.5	0	0	0
1	September ,A (Ava-Louise)	2	1178.2	1390.7	0	0	0	2	1192.4	1390.7	0	0	0
2	Tieties ,P (Pearl)	2	0	-425	0	0	0	2	0	-425	0	0	0
2	Tieties ,P (Pearl)	2	1155.7	730.7	0	0	0	2	1125.8	730.7	0	0	0
3	Kersouw ,E (Emily)	2	0	-425	0	0	0	2	0	-425	0	0	0
3	Kersouw ,E (Emily)	2	1443.3	1018.3	0	0	0	2	1302.1	1018.3	0	0	0
4	Kennedy ,L (Leah)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Kennedy ,L (Leah)	1	1200.3	775.3	1	1158.2	775.3	0	0	0	0	0	0
5	Saayman ,V (Veronique)	1	1	425	1	1	425	0	0	0	0	0	0
5	Saayman ,V (Veronique)	1	1343.4	1768.4	1	1335.3	1768.4	0	0	0	0	0	0
6	Collins ,E (Esme)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Collins ,E (Esme)	1	1270.6	845.6	1	1220.8	845.6	0	0	0	0	0	0
7	Gericke ,D (Deone)	1	1	425	1	1	425	0	0	0	0	0	0
7	Gericke ,D (Deone)	1	1382.2	1807.2	1	1404.2	1807.2	0	0	0	0	0	0
8	Mon ,K (Khadijatul)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Mon ,K (Khadijatul)	1	1213.9	788.9	1	1217.1	788.9	0	0	0	0	0	0
9	Lott ,L (Lucrecia)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Lott ,L (Lucrecia)	1	1278.3	853.3	0	0	0	1	1321.1	853.3	0	0	0
10	Muller ,A (Adrian)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Muller ,A (Adrian)	1	1224.6	799.6	0	0	0	1	1254.5	799.6	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Cornelissen, I (Isabella)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms