Chess South Africa Ratings Database

PLAYER PAGE

Personal

Cornelissen, I (Isabella)

Chess SA id

2120316619

FIDE id

Date of birth

2012-02-03 (U14)

Gender

Female

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

10.5

Junior GPX Points

1041.3

Item	Main	Standard	Rapid	Blitz
Rating	1195.7	1199.6	1190.8	1200
Raw rating	1172.2	1194.6	1141.8	1200
Weighted rating	1195.7	1199.6	1190.8	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	172.5	167.1	180.1	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	-2	-0.4	-4.3	0
New rating	1193.7	1199.2	1186.5	1200
Analysis
Rating	1195.7	1199.6	1190.8	1200
Raw rating	1172.2	1194.6	1141.8	1200
Weighted rating	1195.7	1199.6	1190.8
Weighted performance	0	0	0
K-factor	40	36	40	36
Floor	699.9	700	699.9	700
Max/Min rating change allowed	172.5	167.1	180.1	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	1172.2	1194.6	1141.8	1200
New weighted rating	1193.7	1199.2	1186.5	1200
New weighted performance	0	0	0	0
Temp new rating	1193.7	1199.2	1186.5	1200
Temp new rating +/-	-2	-0.4	-4.3	0
Final new rating +/-	-2	-0.4	-4.3	0
New rating	1193.7	1199.2	1186.5	1200
New K-factor	40	36	40	36
New floor	699.9	700	699.9	700

Item	Main	Standard	Rapid
	0	0	0
	16	5	11
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	16	5	11

Games since
	Main 16	Standard 5		Rapid 11		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	16	5.5	34.38	-132.8	1253.2	1120.4
Standard	5	2	40	-85	1282.1	1197.1
Rapid	11	3.5	31.82	-154.5	1240.1	1085.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	16	5.5	34.38	-132.8	1253.2	1120.4
Standard	5	2	40	-85	1282.1	1197.1
Rapid	11	3.5	31.82	-154.5	1240.1	1085.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
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
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-08-01	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
2023-11-01	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	Western Cape Schools - Top Schools 2025 (U13 Girls)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	2	Yes	Analysis
2	Pedro Booyse Top Schools 2025 (U13 Girls)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	6	6	1.5	Yes	Analysis
3	Lower West Coast Prestige 2025 (U13 Girls)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools - Top Schools 2025 (U13 Girls)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	2	Yes	Analysis
2	Pedro Booyse Top Schools 2025 (U13 Girls)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	6	6	1.5	Yes	Analysis
3	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	Kersouw ,E (Emily)	2	0	-425	0	0	0	2	0	-425	0	0	0
2	Kersouw ,E (Emily)	2	1443.3	1018.3	0	0	0	2	1302.1	1018.3	0	0	0
3	Tieties ,P (Pearl)	2	0	-425	0	0	0	2	0	-425	0	0	0
3	Tieties ,P (Pearl)	2	1155.7	730.7	0	0	0	2	1125.8	730.7	0	0	0
4	Gericke ,D (Deone)	1	1	425	1	1	425	0	0	0	0	0	0
4	Gericke ,D (Deone)	1	1382.2	1807.2	1	1404.2	1807.2	0	0	0	0	0	0
5	Collins ,E (Esme)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Collins ,E (Esme)	1	1270.6	845.6	1	1220.8	845.6	0	0	0	0	0	0
6	Mon ,K (Khadijatul)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Mon ,K (Khadijatul)	1	1213.9	788.9	1	1217.1	788.9	0	0	0	0	0	0
7	Kennedy ,L (Leah)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Kennedy ,L (Leah)	1	1200.3	775.3	1	1158.2	775.3	0	0	0	0	0	0
8	Saayman ,V (Veronique)	1	1	425	1	1	425	0	0	0	0	0	0
8	Saayman ,V (Veronique)	1	1343.4	1768.4	1	1335.3	1768.4	0	0	0	0	0	0
9	Joubert ,A (Amore)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Joubert ,A (Amore)	1	1172	747	0	0	0	1	1193.6	747	0	0	0
10	Swarts ,A (Aneska)	1	1	425	0	0	0	1	1	425	0	0	0
10	Swarts ,A (Aneska)	1	1200	1625	0	0	0	1	1200	1625	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