Chess South Africa Ratings Database

PLAYER PAGE

Personal

Ambrose, I (Isabella)

Chess SA id

2110151735

FIDE id

Date of birth

2011-12-06 (U16)

Gender

Female

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-27

Personal details last changed

1900-01-01

Junior GPX Games

53.7

Junior GPX Points

1374.8

Item	Main	Standard	Rapid	Blitz
Rating	1544.6	1525.1	1488.7	1200
Raw rating	1544.6	1525.1	1488.7	1200
Weighted rating	1526.7	1510.9	1454.8	1200
Weighted performance	1522.9	1508.7	1335	0
Floor	1044.6	1041.5	988.7	700
K-factor	32	32	32	36
Min/Max rating change allowed	101.5	104.3	109.9	165.8
Highest rating	1563.6 2024-09-01	1557.6 2024-09-01	1488.7 2025-09-01	1200 2018-10-01
Highest raw rating	1544.6 2025-11-01	1541.5 2024-10-01	1488.7 2025-09-01	1200 2024-03-01
Highest weighted rating	1526.7 2025-11-01	1541.5 2025-03-01	1442.6 2025-09-01	1200 2018-10-01
Highest weighted performance	1563.6 2024-09-01	1557.6 2024-09-01	1424.5 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1544.6	1525.1	1488.7	1200
Analysis
Rating	1544.6	1525.1	1488.7	1200
Raw rating	1544.6	1525.1	1488.7	1200
Weighted rating	1526.7	1510.9	1454.8
Weighted performance	1522.9	1508.7	1335
K-factor	32	32	32	36
Floor	1044.6	1041.5	988.7	700
Max/Min rating change allowed	101.5	104.3	109.9	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	1544.6	1525.1	1488.7	1200
New weighted rating	1529.2	1513.5	1459.4	1200
New weighted performance	1513.8	1499.7	1326.1	0
Temp new rating	1544.6	1525.1	1488.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1544.6	1525.1	1488.7	1200
New K-factor	32	32	32	36
New floor	1044.6	1041.5	988.7	700

Item	Main	Standard	Rapid
	0	0	0
	57	51	6
	66	44	22
	54	39	15
	0	0	0
	0	0	0
History	177	134	43

Games since
	Main 136	Standard 95		Rapid 41		Blitz 0
Gender	Female
Age group	U16
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	947		342		46
Female	99		40		7
U16	115		41		8
U16 Female	18		9		1
Standard
	RSA		Province		Region
Overall	1034		393		56
Female	126		51		10
U16	124		45		8
U16 Female	21		10		1
Rapid
	RSA		Province		Region
Overall	255		47		6
Female	16		2		1
U16	39		5		1
U16 Female	6		2		1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 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	57	40	70.18	171.5	1332.6	1504.1
Standard	51	34	66.67	141.7	1346	1487.6
Rapid	6	6	100	425	1218.9	1643.9
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	177	124.5	70.34	172.9	1319.1	1491.9
Standard	134	90.5	67.54	149.1	1327.9	1476.9
Rapid	43	34	79.07	247.1	1291.6	1538.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1544.6	1525.1	1488.7	1200
2025-09-30	1543.3	1517.7	1488.7	1200
2025-09-01	1543.3	1517.7	1488.7	1200
2025-08-01	1540.1	1527.6	1465.5	1200
2025-07-01	1540.1	1527.6	1465.5	1200
2025-06-01	1508.2	1492.7	1465.5	1200
2025-05-01	1526.4	1517.6	1453.5	1200
2025-04-01	1500.5	1484.6	1453.5	1200
2025-03-01	1534	1527.4	1453.5	1200
2025-02-01	1542.8	1541.5	1453.5	1200
2025-01-01	1542.8	1541.5	1453.5	1200
2024-12-01	1542.8	1541.5	1453.5	1200
2024-11-01	1542.8	1541.5	1453.5	1200
2024-10-01	1542.8	1541.5	1453.5	1200
2024-09-01	1497.7	1475.8	1418.6	1200
2024-08-01	1497.7	1475.8	1418.6	1200
2024-07-01	1492.1	1458.8	1418.6	1200
2024-09-01	1485.2	1449.2	1418.6	1200
2024-05-01	1485.2	1449.2	1418.6	1200
2024-04-01	1496.1	1453.7	1418.6	1200
2024-03-01	1477.8	1447.3	1334	1200
2024-02-01	1477.8	1447.3	1334	1200
2024-01-01	1454.9	1416.6	1334	1200
2023-12-01	1454.9	1416.6	1334	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	2025 Gauteng Top Schools Teams (U19 Girls)	2025-08-30	2025-08-30	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
2	2025 Gauteng Schools Provincial Individual Chess Championship (U15 Girls)	2025-09-27	2025-09-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
3	Ekurhuleni North Schools Teams 2025 (U19 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	4	3.5	Yes	Analysis
4	Ekurhuleni North Schools Teams 2025 (U19 Girls)	2025-08-15	2025-08-15	Rapid	Ekurhuleni (GE)	5	4	4	Yes	Analysis
5	Ekurhuleni Trials 2025 (D)	2025-07-26	2025-07-26	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
6	Ekurhuleni North School District Finals 2025 (U15 Girls)	2025-06-14	2025-06-14	Standard	Ekurhuleni (GE)	5	4	4	Yes	Analysis
7	Ekurhuleni Trials 2025 (B)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
8	Benoni High School Cluster 2025 (U19)	2025-05-10	2025-05-10	Standard	Ekurhuleni (GE)	5	4	3.5	Yes	Analysis
9	Benoni High School Cluster 2025 (U18 Girls)	2025-05-09	2025-05-09	Rapid	Ekurhuleni (GE)	5	2	2	Yes	Analysis
10	South African Junior Closed Chess Championships 2025 (U14 Girls)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	5.5	Yes	Analysis
11	Ekurhuleni Chess Open 2025 (B)	2025-03-15	2025-03-15	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
12	Benoni High School Cluster 15Feb 2025 (U15 Girls)	2025-02-15	2025-02-15	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Gauteng Top Schools Teams (U19 Girls)	2025-08-30	2025-08-30	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
2	2025 Gauteng Schools Provincial Individual Chess Championship (U15 Girls)	2025-09-27	2025-09-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
3	Ekurhuleni North Schools Teams 2025 (U19 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	4	3.5	Yes	Analysis
4	Ekurhuleni North Schools Teams 2025 (U19 Girls)	2025-08-15	2025-08-15	Rapid	Ekurhuleni (GE)	5	4	4	Yes	Analysis
5	Ekurhuleni Trials 2025 (D)	2025-07-26	2025-07-26	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
6	Ekurhuleni North School District Finals 2025 (U15 Girls)	2025-06-14	2025-06-14	Standard	Ekurhuleni (GE)	5	4	4	Yes	Analysis
7	Ekurhuleni Trials 2025 (B)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
8	Benoni High School Cluster 2025 (U19)	2025-05-10	2025-05-10	Standard	Ekurhuleni (GE)	5	4	3.5	Yes	Analysis
9	Benoni High School Cluster 2025 (U18 Girls)	2025-05-09	2025-05-09	Rapid	Ekurhuleni (GE)	5	2	2	Yes	Analysis
10	South African Junior Closed Chess Championships 2025 (U14 Girls)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	5.5	Yes	Analysis
11	Ekurhuleni Chess Open 2025 (B)	2025-03-15	2025-03-15	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
12	Benoni High School Cluster 15Feb 2025 (U15 Girls)	2025-02-15	2025-02-15	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
13	Ekurhuleni Closed 2024 (U14)	2024-09-21	2024-09-21	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
14	Ekurhuleni North Schools Finals - Teams 2024 (U13 Girls)	2024-08-02	2024-08-02	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis
15	Gauteng Schools Individuals Finals 2024 (U13 Girls)	2024-08-16	2024-08-16	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
16	Ekurhuleni Trails 2 2024 (U14)	2024-07-27	2024-07-27	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
17	EN Chess Club Winter Open 2024 (B)	2024-06-29	2024-06-29	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
18	Ekurhuleni North Primary Schools District Individual Finals 2024 (U13 Girls)	2024-05-11	2024-05-11	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
19	Westwood Open 2024 (B)	2024-04-13	2024-04-13	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
20	Ekurhuleni Open 2024 (B)	2024-04-06	2024-04-06	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
21	Ekurhuleni North Chess Club Open Tournament 2024 (D)	2024-03-02	2024-03-02	Rapid	Ehlanzeni (MEN)	7	7	6	Yes	Analysis
22	CPH St Andrew's Rapid 2024 (B)	2024-03-30	2024-03-30	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis
23	Benoni Primary School Cluster Individuals 2024 (U13 Girls)	2024-03-09	2024-03-09	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
24	1st Knights Open Tournament 2024 (C)	2024-03-23	2024-03-23	Standard	Johannesburg Metro (GJM)	5	5	3.5	Yes	Analysis
25	2024 Gauteng Inter-Region Chess Championship (U14 Girls)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	3	Yes	Analysis
26	Chess Power House Festive Rapid 2023 (Grade 3-7)	2023-12-15	2023-12-15	Rapid	Johannesburg Metro (GJM)	6	6	4.5	Yes	Analysis
27	Ekurhuleni North Chess Club 2023 (C)	2023-12-09	2023-12-09	Rapid	Ekurhuleni (GE)	7	7	5	Yes	Analysis
28	2023 Gauteng Noord (C)	2023-10-14	2023-10-15	Standard	Tshwane (GTP)	5	4	1.5	Yes	Analysis
29	Ekurhuleni Chess Spring Tournament 2023 (D)	2023-09-23	2023-09-23	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
30	2023 Gauteng Top Schools (U13 Mixed)	2023-08-18	2023-08-18	Standard	West Rand (GWR)	5	5	2.5	Yes	Analysis
31	2023 Ekurhuleni North District Schools Finals (U13)	2023-07-29	2023-07-29	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
32	Boksburg Chess Club Rapid 2023	2023-06-20	2023-06-20	Rapid	Ekurhuleni (GE)	5	2	0.5	Yes	Analysis
33	Ekurhuleni Chess Trial 3 2023 (U14)	2023-06-17	2023-06-17	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
34	Ekurhuleni Trials 2 2023 (U14)	2023-04-22	2023-04-22	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
35	Ekhuruleni Chess Trials 1 2023 (U14)	2023-03-25	2023-03-25	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
36	Ekurhuleni Springs Open 4 March 2023 (D)	2023-03-04	2023-03-04	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis

#	Games	Start				End
1	13	Tournament EN Chess Club Winter Open 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-06-29	rnd 5	type Standard	result 1	date 2024-08-16	rnd 2	type Standard	result 1
		Opponent Cossa, S (Shelton)				Opponent Moorcroft, Z (Zelneri)
2	11	Tournament Chess Power House Festive Rapid 2023				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2023-12-15	rnd 4	type Rapid	result 1	date 2024-03-02	rnd 4	type Rapid	result 1
		Opponent Matsamai, O (Ontlametse Bokamoso)				Opponent Van Den Heever, M (Marquis)
3	10	Tournament South African Junior Closed Chess Championships 2025				Tournament Benoni High School Cluster 2025
		date 2025-04-03	rnd 6	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 1
		Opponent Mpuru, M (Moyisi)				Opponent Du Plooy, M (Marnus)

#	Games	Start				End
1	8	Tournament South African Junior Closed Chess Championships 2025				Tournament Benoni High School Cluster 2025
		date 2025-04-03	rnd 6	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 1
		Opponent Mpuru, M (Moyisi)				Opponent Du Plooy, M (Marnus)
2	8	Tournament EN Chess Club Winter Open 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-06-29	rnd 5	type Standard	result 1	date 2024-08-16	rnd 2	type Standard	result 1
		Opponent Cossa, S (Shelton)				Opponent Moorcroft, Z (Zelneri)
3	8	Tournament 2024 Gauteng Inter-Region Chess Championship				Tournament 1st Knights Open Tournament 2024
		date 2024-01-13	rnd 1	type Standard	result 0.5	date 2024-03-23	rnd 4	type Standard	result 0.5
		Opponent Deysel, H (Hannah)				Opponent O'Brien, S (Seth)

#	Games	Start				End
1	12	Tournament CPH St Andrew's Rapid 2024				Tournament Ekurhuleni North Schools Teams 2025
		date 2024-03-30	rnd 5	type Rapid	result 1	date 2025-08-15	rnd 5	type Rapid	result 1
		Opponent Gadney, L (Liam)				Opponent Zungu, A (Amahle)
2	7	Tournament Chess Power House Festive Rapid 2023				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2023-12-15	rnd 4	type Rapid	result 1	date 2024-03-02	rnd 4	type Rapid	result 1
		Opponent Matsamai, O (Ontlametse Bokamoso)				Opponent Van Den Heever, M (Marquis)
3	5	Tournament Ekurhuleni North Chess Club Open Tournament 2024				Tournament Benoni Primary School Cluster Individuals 2024
		date 2024-03-02	rnd 6	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Hingorani, R (Ridhima)				Opponent Theron, C (Clea)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Gauteng Schools Individuals Finals 2024
		date 2024-08-02	rnd 1	type Rapid	result 1	date 2024-08-16	rnd 2	type Standard	result 1
		Opponent Hlatswayo, Z (Zuziwe Anele)				Opponent Moorcroft, Z (Zelneri)
2	5	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-15	rnd 2	type Rapid	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Kotze, S (Skye)				Opponent Hattingh, I (Ivan)
3	5	Tournament Ekurhuleni North School District Finals 2025				Tournament Ekurhuleni Trials 2025
		date 2025-06-14	rnd 2	type Standard	result 1	date 2025-07-26	rnd 1	type Standard	result 1
		Opponent Maphothoma, T (Tshegofatso)				Opponent Cloete, N (Nathan)

#	Games	Start				End
1	5	Tournament Ekurhuleni North School District Finals 2025				Tournament Ekurhuleni Trials 2025
		date 2025-06-14	rnd 2	type Standard	result 1	date 2025-07-26	rnd 1	type Standard	result 1
		Opponent Maphothoma, T (Tshegofatso)				Opponent Cloete, N (Nathan)
2	5	Tournament Gauteng Schools Individuals Finals 2024				Tournament Ekurhuleni Closed 2024
		date 2024-08-16	rnd 4	type Standard	result 1	date 2024-09-21	rnd 3	type Standard	result 1
		Opponent Hingorani, R (Ridhima)				Opponent Aucamp, A (Alexander Nicolai)
3	5	Tournament Ekurhuleni Trials 2 2023				Tournament Ekurhuleni Chess Trial 3 2023
		date 2023-04-22	rnd 5	type Standard	result 1	date 2023-06-17	rnd 4	type Standard	result 1
		Opponent Khutsoane, R (Rethabile)				Opponent Van Rooyen, D (Dion)

#	Games	Start				End
1	12	Tournament CPH St Andrew's Rapid 2024				Tournament Ekurhuleni North Schools Teams 2025
		date 2024-03-30	rnd 5	type Rapid	result 1	date 2025-08-15	rnd 5	type Rapid	result 1
		Opponent Gadney, L (Liam)				Opponent Zungu, A (Amahle)
2	5	Tournament Ekurhuleni North Chess Club Open Tournament 2024				Tournament Benoni Primary School Cluster Individuals 2024
		date 2024-03-02	rnd 6	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Hingorani, R (Ridhima)				Opponent Theron, C (Clea)
3	5	Tournament Chess Power House Festive Rapid 2023				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2023-12-15	rnd 6	type Rapid	result 1	date 2024-03-02	rnd 4	type Rapid	result 1
		Opponent Mallach, D (Daniel)				Opponent Van Den Heever, M (Marquis)

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	Devereux ,C (Cayden)	3	3	425	3	3	425	0	0	0	0	0	0
1	Devereux ,C (Cayden)	3	1253.8	1678.8	3	1247.9	1678.8	0	0	0	0	0	0
2	Tema ,O (Ofana)	3	0.5	-283.3	3	0.5	-283.3	0	0	0	0	0	0
2	Tema ,O (Ofana)	3	1517.2	1233.9	3	1509.1	1233.9	0	0	0	0	0	0
3	Botha ,JCC (Johannes Christiaan Corneli)	3	0	-425	3	0	-425	0	0	0	0	0	0
3	Botha ,JCC (Johannes Christiaan Corneli)	3	1542.1	1117.1	3	1536.1	1117.1	0	0	0	0	0	0
4	Hingorani ,R (Ridhima)	3	2.5	283.3	2	1.5	212.5	1	1	425	0	0	0
4	Hingorani ,R (Ridhima)	3	1456.5	1739.9	2	1475.6	1669	1	1328.1	1881.5	0	0	0
5	Masinge ,N (Nyeleti)	2	1	0	2	1	0	0	0	0	0	0	0
5	Masinge ,N (Nyeleti)	2	1382.8	1382.8	2	1301.6	1382.8	0	0	0	0	0	0
6	Erasmus ,M (Max)	2	2	425	2	2	425	0	0	0	0	0	0
6	Erasmus ,M (Max)	2	1167.2	1592.2	2	1174.2	1592.2	0	0	0	0	0	0
7	Waring ,C (Caydence)	2	2	425	2	2	425	0	0	0	0	0	0
7	Waring ,C (Caydence)	2	1433.2	1858.2	2	1429.4	1858.2	0	0	0	0	0	0
8	Del Grosso ,G (Gianluca Gabriele)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
8	Del Grosso ,G (Gianluca Gabriele)	2	1565.2	1777.8	2	1526.9	1777.8	0	0	0	0	0	0
9	De Vasconcelos ,T (Tiaana)	2	2	425	2	2	425	0	0	0	0	0	0
9	De Vasconcelos ,T (Tiaana)	2	1445.1	1870.1	2	1448.4	1870.1	0	0	0	0	0	0
10	Koekemoer ,M (Marko)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Koekemoer ,M (Marko)	2	1454.2	1029.2	2	1474.2	1029.2	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Ambrose, I (Isabella)

Ratings

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Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms