Chess South Africa Ratings Database

PLAYER PAGE

Personal

Ziervogel, K (Keira)

Chess SA id

2080113546

FIDE id

Date of birth

2008-10-04 (U18)

Gender

Female

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-20

Personal details last changed

1900-01-01

Junior GPX Games

11.9

Junior GPX Points

1438.2

Item	Main	Standard	Rapid	Blitz
Rating	1451.1	1443.5	1293.2	1200
Raw rating	1451.1	1443.5	1292.7	1200
Weighted rating	1387.1	1364.8	1293.2	1200
Weighted performance	1440.4	1400.1	988.3	0
Floor	951.1	943.5	819.8	700
K-factor	32	32	36	36
Min/Max rating change allowed	115.9	117.2	145.3	165.8
Highest rating	1451.1 2025-09-30	1443.5 2025-09-30	1441.6 2022-09-01	1200 2018-10-01
Highest raw rating	1451.1 2025-09-30	1443.5 2025-09-30	1319.8 2024-07-01	1200 2024-03-01
Highest weighted rating	1387.1 2025-09-30	1364.8 2025-09-30	1292.7 2025-08-01	1200 2018-10-01
Highest weighted performance	1440.4 2025-09-30	1400.1 2025-09-30	1441.6 2022-09-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0.1	0
New rating	1451.1	1443.5	1293.3	1200
Analysis
Rating	1451.1	1443.5	1293.2	1200
Raw rating	1451.1	1443.5	1292.7	1200
Weighted rating	1387.1	1364.8	1293.2
Weighted performance	1440.4	1400.1	988.3
K-factor	32	32	36	36
Floor	951.1	943.5	819.8	700
Max/Min rating change allowed	115.9	117.2	145.3	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	1451.1	1443.5	1292.7	1200
New weighted rating	1393.4	1371.9	1293.3	1200
New weighted performance	1439.9	1399.6	987.9	0
Temp new rating	1451.1	1443.5	1293.3	1200
Temp new rating +/-	0	0	0.1	0
Final new rating +/-	0	0	0.1	0
New rating	1451.1	1443.5	1293.3	1200
New K-factor	32	32	36	36
New floor	951.1	943.5	819.8	700

Item	Main	Standard	Rapid
	0	0	0
	9	9	0
	14	4	10
	56	51	5
	49	30	19
	0	0	0
History	137	103	34

Games since
	Main 24	Standard 14		Rapid 10		Blitz 0
Gender	Female
Age group	U18
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 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	9	8.5	94.44	377.8	1299.1	1676.9
Standard	9	8.5	94.44	377.8	1299.1	1676.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	137	77	56.2	52.7	1262.1	1314.9
Standard	103	53	51.46	12.4	1275.1	1287.5
Rapid	34	24	70.59	175	1222.9	1397.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1451.1	1443.5	1292.7	1200
2025-09-01	1418.5	1401.3	1292.7	1200
2025-08-01	1418.5	1401.3	1292.7	1200
2025-07-01	1418.5	1401.3	1292.4	1200
2025-06-01	1418.5	1401.3	1292.1	1200
2025-05-01	1370.2	1338.6	1291.8	1200
2025-04-01	1370.2	1338	1291.3	1200
2025-03-01	1370.2	1338	1290.8	1200
2025-02-01	1370.2	1338	1289.9	1200
2025-01-01	1370.2	1338	1285.2	1200
2024-12-01	1370.2	1338	1285.2	1200
2024-11-01	1370.2	1338	1285.2	1200
2024-10-01	1369	1338	1319.8	1200
2024-09-01	1369	1338	1319.8	1200
2024-08-01	1369	1338	1319.8	1200
2024-07-01	1369	1338	1319.8	1200
2024-06-01	1341.8	1338	1277.7	1200
2024-08-01	1341.8	1338	1277.7	1200
2024-04-01	1341.8	1338	1277.7	1200
2024-03-01	1341.8	1338	1277.7	1200
2024-02-01	1341.8	1338	1277.7	1200
2024-01-01	1350.6	1345.9	1277.7	1200
2023-12-01	1350.6	1345.9	1277.7	1200
2023-11-01	1350.6	1345.9	1277.7	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	St Peters College Sports & Cultural Festival 2025	2025-09-19	2025-09-20	Standard	Johannesburg Metro (GJM)	6	5	5	Yes	Analysis
2	National All Girls' Festival 2025	2025-04-28	2025-04-30	Standard	Cape Town (WCT)	5	4	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	St Peters College Sports & Cultural Festival 2025	2025-09-19	2025-09-20	Standard	Johannesburg Metro (GJM)	6	5	5	Yes	Analysis
2	National All Girls' Festival 2025	2025-04-28	2025-04-30	Standard	Cape Town (WCT)	5	4	3.5	Yes	Analysis
3	Gauteng Top Schools 2024 (U19 Girls)	2024-10-05	2024-10-05	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis
4	Chess Molecules Open Chess Tournament 2024 (High School Girls)	2024-06-15	2024-06-15	Rapid	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
5	2024 Gauteng Inter-Region Chess Championship (U16 Girls)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
6	Africawide Chess Championship 2023 (Open)	2023-11-03	2023-11-05	Standard	Johannesburg Metro (GJM)	7	1	0	Yes	Analysis
7	2023 Gauteng Top Schools (U15 Girls)	2023-08-19	2023-08-19	Standard	West Rand (GWR)	5	5	4.5	Yes	Analysis
8	Chess Molecules 16 June Tournament 2023 (High School Girls)	2023-06-16	2023-06-16	Rapid	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
9	Ekurhuleni Chess Trial 3 2023 (U16)	2023-06-17	2023-06-17	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
10	Gauteng Schools Individual Finals 2023 (U15 Girls)	2023-05-27	2023-05-27	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
11	Ekurhuleni Trials 2 2023 (U16)	2023-04-22	2023-04-22	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
12	National All Girls Festival 2023	2023-04-28	2023-04-30	Standard	Mangaung (FMB)	7	7	2	Yes	Analysis
13	2023 South African Junior Closed Chess Championships (U16 Girls)	2023-03-31	2023-04-04	Standard	Chess South Africa (CSA)	9	9	1	Yes	Analysis
14	Ekhuruleni Chess Trials 1 2023 (U16)	2023-03-25	2023-03-25	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
15	Ekurhuleni Springs Open 4 March 2023 (C)	2023-03-04	2023-03-04	Standard	Ekurhuleni (GE)	5	4	0.5	Yes	Analysis
16	Chess Power House Feb RR 2023 (Junior)	2023-02-18	2023-02-19	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
17	2022 South African Junior Wild Card Chess Championships (U16 Girls)	2022-12-09	2022-12-12	Standard	4 Knights (4K)	7	6	1.5	Yes	Analysis
18	2022 South African Junior Team Chess Championships (U14-U18 Girls)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	5	3.5	Yes	Analysis
19	Chess Power House Rapid 2022 (High School)	2022-10-22	2022-10-22	Rapid	Johannesburg Metro (GJM)	5	4	1.5	Yes	Analysis
20	OR Tambo Soncini Finals 2022 (Girls)	2022-10-29	2022-10-29	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
21	ACB Tournament 2022 (C)	2022-10-08	2022-10-08	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
22	Chess Molecules Championship 2022 (Queens)	2022-09-17	2022-09-17	Rapid	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
23	Ekurhuleni Soncini Playoffs 2022 (Girls)	2022-09-24	2022-09-24	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis
24	Ekurhuleni Chess Springs Club Open 2022 (D)	2022-09-03	2022-09-03	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
25	2022 Gauteng Schools Team Championships (U15 Girls)	2022-08-26	2022-08-26	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
26	Ekurhuleni Trials 1 2022 (U16)	2022-04-23	2022-04-23	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
27	Alberton Chess Club Open 2020 (D)	2020-02-22	2020-02-22	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
28	Ekurhuleni South School Chess 2019 (U11 Girls)	2019-05-11	2019-05-11	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis

#	Games	Start				End
1	8	Tournament Ekurhuleni Soncini Playoffs 2022				Tournament ACB Tournament 2022
		date 2022-09-24	rnd 1	type Rapid	result 1	date 2022-10-08	rnd 3	type Standard	result 1
		Opponent Motloung, D (Dimakatso)				Opponent Michalakis, G (Gina)
2	7	Tournament Ekurhuleni Chess Trial 3 2023				Tournament 2023 Gauteng Top Schools
		date 2023-06-17	rnd 4	type Standard	result 0.5	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Nyembe, A (Amahle)				Opponent Shibase, L (Lonwabo)
3	6	Tournament Ekurhuleni Chess Springs Club Open 2022				Tournament Chess Molecules Championship 2022
		date 2022-09-03	rnd 2	type Standard	result 1	date 2022-09-17	rnd 2	type Rapid	result 1
		Opponent Le Roux, R (Roland)				Opponent Rammala, W (William)

#	Games	Start				End
1	7	Tournament Ekurhuleni Chess Trial 3 2023				Tournament 2023 Gauteng Top Schools
		date 2023-06-17	rnd 4	type Standard	result 0.5	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Nyembe, A (Amahle)				Opponent Shibase, L (Lonwabo)
2	7	Tournament Ekurhuleni Chess Springs Club Open 2022				Tournament ACB Tournament 2022
		date 2022-09-03	rnd 2	type Standard	result 1	date 2022-10-08	rnd 3	type Standard	result 1
		Opponent Le Roux, R (Roland)				Opponent Michalakis, G (Gina)
3	5	Tournament 2022 South African Junior Team Chess Championships				Tournament 2022 South African Junior Wild Card Chess Championships
		date 2022-12-04	rnd 2	type Standard	result 1	date 2022-12-09	rnd 1	type Standard	result 0.5
		Opponent Van Heerden, D (Dante)				Opponent Nyarenda, M (Miranda)

#	Games	Start				End
1	5	Tournament Chess Molecules 16 June Tournament 2023				Tournament Chess Molecules Open Chess Tournament 2024
		date 2023-06-16	rnd 3	type Rapid	result 1	date 2024-06-15	rnd 2	type Rapid	result 1
		Opponent Chan-Henry, S (Sophie)				Opponent Okafor, G (Grace)
2	5	Tournament Ekurhuleni Soncini Playoffs 2022				Tournament Ekurhuleni Soncini Playoffs 2022
		date 2022-09-24	rnd 1	type Rapid	result 1	date 2022-09-24	rnd 5	type Rapid	result 1
		Opponent Motloung, D (Dimakatso)				Opponent Dingalibaba, R (Reabetswe Ziyanda)
3	4	Tournament Chess Power House Rapid 2022				Tournament OR Tambo Soncini Finals 2022
		date 2022-10-22	rnd 4	type Rapid	result 0.5	date 2022-10-29	rnd 3	type Rapid	result 1
		Opponent Okafor, G (Grace)				Opponent Bartman, J (Jadey)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament Ekurhuleni Soncini Playoffs 2022				Tournament ACB Tournament 2022
		date 2022-09-24	rnd 1	type Rapid	result 1	date 2022-10-08	rnd 3	type Standard	result 1
		Opponent Motloung, D (Dimakatso)				Opponent Michalakis, G (Gina)
2	6	Tournament Ekurhuleni Chess Springs Club Open 2022				Tournament Chess Molecules Championship 2022
		date 2022-09-03	rnd 2	type Standard	result 1	date 2022-09-17	rnd 2	type Rapid	result 1
		Opponent Le Roux, R (Roland)				Opponent Rammala, W (William)
3	3	Tournament Chess Molecules Open Chess Tournament 2024				Tournament Gauteng Top Schools 2024
		date 2024-06-15	rnd 4	type Rapid	result 1	date 2024-10-05	rnd 1	type Rapid	result 1
		Opponent Karuppan, Z (Zebada)				Opponent Naidoo, M (Marisa)

#	Games	Start				End
1	7	Tournament Ekurhuleni Chess Springs Club Open 2022				Tournament ACB Tournament 2022
		date 2022-09-03	rnd 2	type Standard	result 1	date 2022-10-08	rnd 3	type Standard	result 1
		Opponent Le Roux, R (Roland)				Opponent Michalakis, G (Gina)
2	3	Tournament Ekurhuleni Chess Trial 3 2023				Tournament 2023 Gauteng Top Schools
		date 2023-06-17	rnd 5	type Standard	result 1	date 2023-08-19	rnd 2	type Standard	result 1
		Opponent Ussuph, Y (Yahya)				Opponent Negondani, L (Livhuwani)
3	2	Tournament National All Girls' Festival 2025				Tournament National All Girls' Festival 2025
		date 2025-04-29	rnd 4	type Standard	result 1	date 2025-04-30	rnd 5	type Standard	result 1
		Opponent Murray, J (Jessica)				Opponent Ferreira, M (Mila)

#	Games	Start				End
1	5	Tournament Ekurhuleni Soncini Playoffs 2022				Tournament Ekurhuleni Soncini Playoffs 2022
		date 2022-09-24	rnd 1	type Rapid	result 1	date 2022-09-24	rnd 5	type Rapid	result 1
		Opponent Motloung, D (Dimakatso)				Opponent Dingalibaba, R (Reabetswe Ziyanda)
2	3	Tournament Chess Molecules Open Chess Tournament 2024				Tournament Gauteng Top Schools 2024
		date 2024-06-15	rnd 4	type Rapid	result 1	date 2024-10-05	rnd 1	type Rapid	result 1
		Opponent Karuppan, Z (Zebada)				Opponent Naidoo, M (Marisa)
3	3	Tournament Chess Molecules 16 June Tournament 2023				Tournament Chess Molecules Open Chess Tournament 2024
		date 2023-06-16	rnd 5	type Rapid	result 1	date 2024-06-15	rnd 2	type Rapid	result 1
		Opponent Nwaokpo, C (Charity)				Opponent Okafor, G (Grace)

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	Padayachy ,S (Shreya)	5	0.5	-340	5	0.5	-340	0	0	0	0	0	0
1	Padayachy ,S (Shreya)	5	1393.9	1053.9	5	1388.1	1053.9	0	0	0	0	0	0
2	Jain ,C (Chesta)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
2	Jain ,C (Chesta)	3	1262	1262	3	1256	1262	0	0	0	0	0	0
3	Radia ,D (Diya)	3	1	-141.7	2	0	-425	1	1	425	0	0	0
3	Radia ,D (Diya)	3	1361.9	1220.2	2	1342.2	936.9	1	699.2	1786.9	0	0	0
4	Okafor ,G (Grace)	3	1.5	0	0	0	0	3	1.5	0	0	0	0
4	Okafor ,G (Grace)	3	1171.5	1171.5	0	0	0	3	1229.8	1171.5	0	0	0
5	Ferreira ,M (Mila)	2	1	0	2	1	0	0	0	0	0	0	0
5	Ferreira ,M (Mila)	2	1546.4	1546.4	2	1518	1546.4	0	0	0	0	0	0
6	Netshimbupfe ,W (Wanga)	2	1	0	2	1	0	0	0	0	0	0	0
6	Netshimbupfe ,W (Wanga)	2	1374.3	1374.3	2	1365.1	1374.3	0	0	0	0	0	0
7	Nkhwashu ,G (Geraldine)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Nkhwashu ,G (Geraldine)	2	1338.9	913.9	2	1326.8	913.9	0	0	0	0	0	0
8	Nyarenda ,M (Miranda)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
8	Nyarenda ,M (Miranda)	2	1219.7	1007.2	2	1217.1	1007.2	0	0	0	0	0	0
9	Shen Yu ,F (Frank)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Shen Yu ,F (Frank)	2	1309.1	884.1	2	1308.1	884.1	0	0	0	0	0	0
10	Myburgh ,X (Xuan)	2	2	425	2	2	425	0	0	0	0	0	0
10	Myburgh ,X (Xuan)	2	1222.2	1647.2	2	1210	1647.2	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

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PLAYER PAGE

Personal

Ziervogel, K (Keira)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms