Chess South Africa Ratings Database

PLAYER PAGE

Personal

Petrus, I (Isabella)

Chess SA id

2150305812

FIDE id

Date of birth

2015-04-07 (U12)

Gender

Female

Region

Sarah Baartman (ESB)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1227.5

Item	Main	Standard	Rapid	Blitz
Rating	1237.2	1210.5	1243.2	1200
Raw rating	1219.6	1187.4	1243.2	1200
Weighted rating	1237.2	1210.5	1235.3	1200
Weighted performance	1157.8	1154.8	0	0
Floor	803.5	769.8	743.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	161.2	168.8	155.9	165.8
Highest rating	1303.5 2025-06-01	1269.8 2025-06-01	1392.7 2024-08-01	1200 2024-06-01
Highest raw rating	1303.5 2025-06-01	1269.8 2025-06-01	1243.2 2024-09-01	1200 2024-06-01
Highest weighted rating	1303.5 2024-06-01	1269.8 2024-06-01	1243.2 2024-10-01	1200 2024-06-01
Highest weighted performance	1303.5 2025-06-01	1269.8 2025-01-01	1392.7 2024-08-01	1200 2024-06-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0	-1	0	0
New rating	1237.2	1209.5	1243.2	1200
Analysis
Rating	1237.2	1210.5	1243.2	1200
Raw rating	1219.6	1187.4	1243.2	1200
Weighted rating	1237.2	1210.5	1235.3
Weighted performance	1157.8	1154.8	0
K-factor	36	36	36	36
Floor	803.5	769.8	743.2	700
Max/Min rating change allowed	161.2	168.8	155.9	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	1219.6	1187.4	1243.2	1200
New weighted rating	1237.2	1209.5	1236.7	1200
New weighted performance	1157.4	1154.3	0	0
Temp new rating	1237.2	1209.5	1243.2	1200
Temp new rating +/-	-0	-1	0	0
Final new rating +/-	-0	-1	0	0
New rating	1237.2	1209.5	1243.2	1200
New K-factor	36	36	36	36
New floor	803.5	769.8	743.2	700

Item	Main	Standard	Rapid
	0	0	0
	21	21	0
	13	8	5
	0	0	0
	0	0	0
	0	0	0
History	34	29	5

Games since
	Main 34	Standard 29		Rapid 5		Blitz 0
Gender	Female
Age group	U12
Region	Sarah Baartman (ESB)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U12	-1		-1		-1
U12 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U12	-1		-1		-1
U12 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U12	-1		-1		-1
U12 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U12	-1		-1		-1
U12 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	10.5	50	0	1236.1	1236.1
Standard	21	10.5	50	0	1236.1	1236.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	34	17	50	0	1216.5	1216.5
Standard	29	13.5	46.55	-29.3	1216.7	1187.4
Rapid	5	3.5	70	170	1215	1385
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1219.6	1187.4	1243.2	1200
2025-09-01	1303.5	1269.8	1243.2	1200
2025-08-01	1303.5	1269.8	1243.2	1200
2025-07-01	1303.5	1269.8	1243.2	1200
2025-06-01	1303.5	1269.8	1243.2	1200
2025-05-01	1269.8	1242.6	1243.2	1200
2025-04-01	1269.8	1242.6	1243.2	1200
2025-03-01	1215.1	1200.3	1243.2	1200
2025-02-01	1198.4	1175.7	1243.2	1200
2025-01-01	1198.4	1159.2	1243.2	1200
2024-12-01	1198.4	1159.2	1243.2	1200
2024-11-01	1198.4	1159.2	1243.2	1200
2024-10-01	1198.4	1159.2	1243.2	1200
2024-09-01	1198.4	1159.2	1243.2	1200
2024-08-01	1165.7	1159.2	1200	1200
2024-07-01	1136.5	1124	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	EC Closed 2025 (U12 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	1	Yes	Analysis
2	SBDCA Closed 2025 (U12 Girls)	2025-05-10	2025-05-10	Standard	Sarah Baartman (ESB)	6	6	3.5	Yes	Analysis
3	SBDCA Trials GRT 22 March 2025 (U12 Girls)	2025-03-22	2025-03-22	Standard	Sarah Baartman (ESB)	5	4	3	Yes	Analysis
4	SBDCU Graaff-Reinet Trials 2025 (U12)	2025-02-15	2025-02-15	Standard	Sarah Baartman (ESB)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	EC Closed 2025 (U12 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	1	Yes	Analysis
2	SBDCA Closed 2025 (U12 Girls)	2025-05-10	2025-05-10	Standard	Sarah Baartman (ESB)	6	6	3.5	Yes	Analysis
3	SBDCA Trials GRT 22 March 2025 (U12 Girls)	2025-03-22	2025-03-22	Standard	Sarah Baartman (ESB)	5	4	3	Yes	Analysis
4	SBDCU Graaff-Reinet Trials 2025 (U12)	2025-02-15	2025-02-15	Standard	Sarah Baartman (ESB)	5	5	3	Yes	Analysis
5	Sarah Baartman District Schools Trials 2024 (U9 Girls)	2024-08-03	2024-08-03	Rapid	Sarah Baartman (ESB)	5	5	3.5	Yes	Analysis
6	SBDCU Closed Trials 2024 (U10 Girls)	2024-07-27	2024-07-27	Standard	Sarah Baartman (ESB)	5	4	3	Yes	Analysis
7	SBDCU Trial 3 2024 (U10)	2024-06-01	2024-06-01	Standard	Sarah Baartman (ESB)	5	4	0	Yes	Analysis

#	Games	Start				End
1	5	Tournament SBDCU Closed Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-07-27	rnd 5	type Standard	result 1	date 2024-08-03	rnd 4	type Rapid	result 1
		Opponent Mpangalala, Z (Zizo)				Opponent Mabopa, P (Paballo)
2	4	Tournament SBDCU Graaff-Reinet Trials 2025				Tournament SBDCA Trials GRT 22 March 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-22	rnd 4	type Standard	result 1
		Opponent Verwey, I (Ilana)				Opponent Jacobs, A (Azareah)
3	2	Tournament SBDCA Closed 2025				Tournament SBDCA Closed 2025
		date 2025-05-10	rnd 3	type Standard	result 1	date 2025-05-10	rnd 4	type Standard	result 0.5
		Opponent Hauptfleisch, Z (Zandri)				Opponent Smith, Z (Zahra)

#	Games	Start				End
1	4	Tournament SBDCU Graaff-Reinet Trials 2025				Tournament SBDCA Trials GRT 22 March 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-22	rnd 4	type Standard	result 1
		Opponent Verwey, I (Ilana)				Opponent Jacobs, A (Azareah)
2	2	Tournament SBDCA Closed 2025				Tournament SBDCA Closed 2025
		date 2025-05-10	rnd 3	type Standard	result 1	date 2025-05-10	rnd 4	type Standard	result 0.5
		Opponent Hauptfleisch, Z (Zandri)				Opponent Smith, Z (Zahra)
3	2	Tournament SBDCU Closed Trials 2024				Tournament SBDCU Graaff-Reinet Trials 2025
		date 2024-07-27	rnd 5	type Standard	result 1	date 2025-02-15	rnd 1	type Standard	result 1
		Opponent Mpangalala, Z (Zizo)				Opponent Macleod, M (Milla)

#	Games	Start				End
1	4	Tournament Sarah Baartman District Schools Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-08-03	rnd 1	type Rapid	result 1	date 2024-08-03	rnd 4	type Rapid	result 1
		Opponent Herrington, M (Mia)				Opponent Mabopa, P (Paballo)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament SBDCU Graaff-Reinet Trials 2025				Tournament SBDCA Trials GRT 22 March 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-22	rnd 4	type Standard	result 1
		Opponent Verwey, I (Ilana)				Opponent Jacobs, A (Azareah)
2	2	Tournament Sarah Baartman District Schools Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-08-03	rnd 3	type Rapid	result 1	date 2024-08-03	rnd 4	type Rapid	result 1
		Opponent Retief, M (Marize)				Opponent Mabopa, P (Paballo)
3	2	Tournament SBDCU Closed Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-07-27	rnd 5	type Standard	result 1	date 2024-08-03	rnd 1	type Rapid	result 1
		Opponent Mpangalala, Z (Zizo)				Opponent Herrington, M (Mia)

#	Games	Start				End
1	4	Tournament SBDCU Graaff-Reinet Trials 2025				Tournament SBDCA Trials GRT 22 March 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-22	rnd 4	type Standard	result 1
		Opponent Verwey, I (Ilana)				Opponent Jacobs, A (Azareah)
2	2	Tournament SBDCU Closed Trials 2024				Tournament SBDCU Graaff-Reinet Trials 2025
		date 2024-07-27	rnd 5	type Standard	result 1	date 2025-02-15	rnd 1	type Standard	result 1
		Opponent Mpangalala, Z (Zizo)				Opponent Macleod, M (Milla)
3	2	Tournament SBDCU Closed Trials 2024				Tournament SBDCU Closed Trials 2024
		date 2024-07-27	rnd 1	type Standard	result 1	date 2024-07-27	rnd 2	type Standard	result 1
		Opponent Ndawana, E (Elimiyo)				Opponent Retief, M (Marize)

#	Games	Start				End
1	2	Tournament Sarah Baartman District Schools Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-08-03	rnd 3	type Rapid	result 1	date 2024-08-03	rnd 4	type Rapid	result 1
		Opponent Retief, M (Marize)				Opponent Mabopa, P (Paballo)
2	1	Tournament Sarah Baartman District Schools Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-08-03	rnd 1	type Rapid	result 1	date 2024-08-03	rnd 1	type Rapid	result 1
		Opponent Herrington, M (Mia)				Opponent Herrington, M (Mia)

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	Ndumela ,B (Bulumko)	3	0	-425	2	0	-425	1	0	-425	0	0	0
1	Ndumela ,B (Bulumko)	3	1365.5	940.5	2	1375.4	940.5	1	1308.5	940.5	0	0	0
2	Brinkhuis ,C (Caris)	2	2	425	2	2	425	0	0	0	0	0	0
2	Brinkhuis ,C (Caris)	2	1199.9	1624.9	2	1199.9	1624.9	0	0	0	0	0	0
3	Jacobs ,A (Azareah)	2	2	425	2	2	425	0	0	0	0	0	0
3	Jacobs ,A (Azareah)	2	1198.1	1623.1	2	1197.7	1623.1	0	0	0	0	0	0
4	Hauptfleisch ,Z (Zandri)	2	1	0	2	1	0	0	0	0	0	0	0
4	Hauptfleisch ,Z (Zandri)	2	1241.9	1241.9	2	1247.7	1241.9	0	0	0	0	0	0
5	Van Zyl ,L (Louise- Marie)	2	1	0	2	1	0	0	0	0	0	0	0
5	Van Zyl ,L (Louise- Marie)	2	1318.6	1318.6	2	1308	1318.6	0	0	0	0	0	0
6	Retief ,M (Marize)	2	2	425	1	1	425	1	1	425	0	0	0
6	Retief ,M (Marize)	2	1095.9	1520.9	1	1089.2	1520.9	1	1200	1520.9	0	0	0
7	Ntamo ,Z (Zingce)	1	1	425	1	1	425	0	0	0	0	0	0
7	Ntamo ,Z (Zingce)	1	1171	1596	1	1164.6	1596	0	0	0	0	0	0
8	Ayerst ,R (Rebecca)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Ayerst ,R (Rebecca)	1	1200.4	775.4	1	1204.1	775.4	0	0	0	0	0	0
9	Booisen ,M (Mia Faith)	1	1	425	1	1	425	0	0	0	0	0	0
9	Booisen ,M (Mia Faith)	1	1197.2	1622.2	1	1196.8	1622.2	0	0	0	0	0	0
10	Wolfaardt ,F (Franco)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Wolfaardt ,F (Franco)	1	1200	775	1	1200	775	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

Petrus, 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