Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grobler, M (Mia)

Chess SA id

2130139731

FIDE id

Date of birth

2013-05-05 (U14)

Gender

Female

Region

Nelson Mandela Bay (ENM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-04

Personal details last changed

1900-01-01

Junior GPX Games

74.3

Junior GPX Points

1287.8

Item	Main	Standard	Rapid	Blitz
Rating	1365.3	1370	1177.5	1200
Raw rating	1365.3	1370	1177.5	1200
Weighted rating	1325.2	1329	1165.8	1200
Weighted performance	1324.9	1328.2	0	0
Floor	873.7	872.3	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	131	130.2	171.2	165.8
Highest rating	1373.7 2025-04-01	1372.3 2025-04-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1373.7 2025-04-01	1372.3 2025-04-01	1200 2019-12-01	1200 2024-03-01
Highest weighted rating	1325.2 2025-11-01	1323.4 2025-09-30	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1368.8 2025-04-01	1364.6 2024-09-01	1200 2019-12-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1365.3	1370	1177.5	1200
Analysis
Rating	1365.3	1370	1177.5	1200
Raw rating	1365.3	1370	1177.5	1200
Weighted rating	1325.2	1329	1165.8
Weighted performance	1324.9	1328.2	0
K-factor	36	36	36	36
Floor	873.7	872.3	700	700
Max/Min rating change allowed	131	130.2	171.2	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	1365.3	1370	1177.5	1200
New weighted rating	1330.3	1334.2	1166.6	1200
New weighted performance	1317	1320.2	0	0
Temp new rating	1365.3	1370	1177.5	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1365.3	1370	1177.5	1200
New K-factor	36	36	36	36
New floor	873.7	872.3	700	700

Item	Main	Standard	Rapid
	0	0	0
	68	64	4
	66	61	5
	43	43	0
	34	28	6
	0	0	0
History	211	196	15

Games since
	Main 134	Standard 125		Rapid 9		Blitz 0
Gender	Female
Age group	U14
Region	Nelson Mandela Bay (ENM)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	2556		312		111
Female	459		48		17
U14	428		68		22
U14 Female	104		14		7
Standard
	RSA		Province		Region
Overall	2431		306		105
Female	441		50		17
U14	415		68		21
U14 Female	103		13		6
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	68	35.5	52.21	18.8	1337.9	1356.6
Standard	64	33.5	52.34	19.9	1338.8	1358.8
Rapid	4	2	50	0	1322.7	1322.7
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	211	100.5	47.63	-20.1	1265.8	1245.6
Standard	196	95	48.47	-13	1267.5	1254.5
Rapid	15	5.5	36.67	-113.3	1243.2	1129.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1365.3	1370	1177.5	1200
2025-09-30	1367.8	1370	1166.4	1200
2025-09-01	1341.8	1338.7	1166.4	1200
2025-08-01	1358.8	1359.3	1166.4	1200
2025-07-01	1358.8	1359.3	1166.4	1200
2025-06-01	1330.5	1322	1166.4	1200
2025-05-01	1336.3	1326.3	1166.4	1200
2025-04-01	1373.7	1372.3	1166.4	1200
2025-03-01	1360.8	1356.8	1166.4	1200
2025-02-01	1330.8	1356.5	1163.9	1200
2025-01-01	1296.5	1320.7	1126	1200
2024-12-01	1273.5	1309.2	1126	1200
2024-11-01	1303.7	1309.2	1175.2	1200
2024-10-01	1303.7	1309.2	1175.2	1200
2024-09-01	1268.7	1278.8	1175.2	1200
2024-08-01	1226.3	1222.3	1175.2	1200
2024-07-01	1254.7	1255.8	1175.2	1200
2024-09-01	1254.7	1255.8	1175.2	1200
2024-05-01	1278	1285.3	1175.2	1200
2024-04-01	1255.3	1257.2	1175.2	1200
2024-03-01	1259.9	1261.2	1175.2	1200
2024-02-01	1242.5	1243.7	1175.2	1200
2024-01-01	1242.5	1243.7	1175.2	1200
2023-12-01	1242.5	1243.7	1175.2	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	Fide in the Bay 2025 (B)	2025-10-04	2025-10-04	Rapid	Nelson Mandela Bay (ENM)	7	4	2	Yes	Analysis
2	EC Closed 2025 (U14 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	4	Yes	Analysis
3	FIDE in the Bay 2025 (B)	2025-08-30	2025-08-30	Standard	Nelson Mandela Bay (ENM)	5	4	2	Yes	Analysis
4	UCC Mind Over Board 2025 (B)	2025-08-01	2025-08-03	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
5	Ty's Winter Classic 2025	2025-06-27	2025-06-28	Standard	Nelson Mandela Bay (ENM)	7	7	4	Yes	Analysis
6	NMBCU Closed 2025 (U14)	2025-06-13	2025-06-14	Standard	Nelson Mandela Bay (ENM)	6	6	2.5	Yes	Analysis
7	NMBCU Trial 4 2025 (U14)	2025-05-09	2025-05-10	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis
8	NMB 3rd Trials 2025 (U14)	2025-04-11	2025-04-12	Standard	Nelson Mandela Bay (ENM)	6	6	2.5	Yes	Analysis
9	NMB 2nd Trials 2025 (U14)	2025-03-07	2025-03-08	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
10	Pearson High Chess Festival 2025 (C)	2025-02-21	2025-02-22	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
11	NMBCH Trial 1 2025 (U14)	2025-02-14	2025-02-15	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
12	SBDCU Fundraiser 2025 (U13)	2025-02-01	2025-02-01	Standard	Sarah Baartman (ESB)	5	2	1	Yes	Analysis
13	NMBCU vs BCC Derby Chess Invitational 2025 (Open B)	2025-01-10	2025-01-11	Standard	Nelson Mandela Bay (ENM)	5	5	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Fide in the Bay 2025 (B)	2025-10-04	2025-10-04	Rapid	Nelson Mandela Bay (ENM)	7	4	2	Yes	Analysis
2	EC Closed 2025 (U14 Girls)	2025-09-06	2025-09-07	Standard	Nelson Mandela Bay (ENM)	6	6	4	Yes	Analysis
3	FIDE in the Bay 2025 (B)	2025-08-30	2025-08-30	Standard	Nelson Mandela Bay (ENM)	5	4	2	Yes	Analysis
4	UCC Mind Over Board 2025 (B)	2025-08-01	2025-08-03	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
5	Ty's Winter Classic 2025	2025-06-27	2025-06-28	Standard	Nelson Mandela Bay (ENM)	7	7	4	Yes	Analysis
6	NMBCU Closed 2025 (U14)	2025-06-13	2025-06-14	Standard	Nelson Mandela Bay (ENM)	6	6	2.5	Yes	Analysis
7	NMBCU Trial 4 2025 (U14)	2025-05-09	2025-05-10	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis
8	NMB 3rd Trials 2025 (U14)	2025-04-11	2025-04-12	Standard	Nelson Mandela Bay (ENM)	6	6	2.5	Yes	Analysis
9	NMB 2nd Trials 2025 (U14)	2025-03-07	2025-03-08	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
10	Pearson High Chess Festival 2025 (C)	2025-02-21	2025-02-22	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
11	NMBCH Trial 1 2025 (U14)	2025-02-14	2025-02-15	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
12	SBDCU Fundraiser 2025 (U13)	2025-02-01	2025-02-01	Standard	Sarah Baartman (ESB)	5	2	1	Yes	Analysis
13	NMBCU vs BCC Derby Chess Invitational 2025 (Open B)	2025-01-10	2025-01-11	Standard	Nelson Mandela Bay (ENM)	5	5	3.5	Yes	Analysis
14	Mzansi Interprovincial Youth Chess Championships 2024 (U12 Girls Candidates)	2024-12-16	2024-12-19	Standard	Capricorn (LCP)	7	7	4	Yes	Analysis
15	Grey Junior School Chess Team Championship 2024 (Senior)	2024-11-02	2024-11-02	Rapid	Nelson Mandela Bay (ENM)	5	5	1	Yes	Analysis
16	NMBCU Closed 2024 (U12)	2024-09-20	2024-09-21	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
17	2024 UCC Mind Over Board (B)	2024-08-30	2024-09-01	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
18	NMBCU Trial 5 2024 (U12)	2024-08-16	2024-08-17	Standard	Nelson Mandela Bay (ENM)	6	6	3.5	Yes	Analysis
19	Checkmates Women's Day Chess 2024	2024-08-09	2024-08-09	Standard	Nelson Mandela Bay (ENM)	5	5	2	Yes	Analysis
20	NMBCU Trials 4 2024 (U12)	2024-07-12	2024-07-13	Standard	Nelson Mandela Bay (ENM)	6	4	1	Yes	Analysis
21	NMBCU Trial 3 2024 (U12)	2024-05-10	2024-05-11	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
22	NMBCU Trials 2 2024 (U12)	2024-04-12	2024-04-13	Standard	Nelson Mandela Bay (ENM)	6	6	4	Yes	Analysis
23	UCC Strategic Moves 2024 (B)	2024-03-08	2024-03-09	Standard	Nelson Mandela Bay (ENM)	5	5	2.5	Yes	Analysis
24	NMBCU Trials 1 2024 (U12)	2024-02-16	2024-02-16	Standard	Nelson Mandela Bay (ENM)	6	6	4.5	Yes	Analysis
25	Pearson Open Chess Tournament 2024 (C)	2024-02-23	2024-02-24	Standard	Nelson Mandela Bay (ENM)	5	5	2	Yes	Analysis
26	Eastern Cape Provincial Individual Championship 2023 (U12 Girls)	2023-10-05	2023-10-05	Standard	Nelson Mandela Bay (ENM)	7	7	3	Yes	Analysis
27	Eastern Cape Chess Team Championship 2023 (U12)	2023-10-07	2023-10-08	Standard	Sarah Baartman (ESB)	5	4	3	Yes	Analysis
28	Uitenhage Chess Club Grand Prix 2023 (B)	2023-08-25	2023-08-26	Standard	Nelson Mandela Bay (ENM)	5	3	1	Yes	Analysis
29	NMBCU Closed 2023 (U12)	2023-08-11	2023-08-12	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
30	NMBCU Trial 4 2023 (U12)	2023-07-28	2023-07-29	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis
31	EP Trials 3 2023 (U12)	2023-05-05	2023-05-06	Standard	Nelson Mandela Bay (ENM)	6	6	2.5	Yes	Analysis
32	NMB 2nd Trials 2023 (U12)	2023-03-24	2023-03-25	Standard	Nelson Mandela Bay (ENM)	6	5	2	Yes	Analysis
33	NMB 1st Trials 2023 (U12)	2023-02-17	2023-02-18	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
34	2022 Madibaz Tournament (Primary School Team)	2022-09-10	2022-09-10	Rapid	Nelson Mandela Bay (ENM)	6	6	2.5	Yes	Analysis
35	2022 NMBCU Closed 2022 (U10)	2022-08-19	2022-08-20	Standard	Nelson Mandela Bay (ENM)	5	5	2	Yes	Analysis
36	2022 NMBCU Trial 4 (U10)	2022-08-12	2022-08-13	Standard	Nelson Mandela Bay (ENM)	6	5	2	Yes	Analysis
37	NMBCU Trial 3 2022 (U10)	2022-07-22	2022-07-23	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis
38	2022 NMB Junior Trials 2 (U10)	2022-05-13	2022-05-14	Standard	Nelson Mandela Bay (ENM)	6	6	1.5	Yes	Analysis
39	2022 NMB Junior Trials 1 (U10)	2022-04-22	2022-04-23	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament NMBCU Trials 1 2024				Tournament Pearson Open Chess Tournament 2024
		date 2024-02-16	rnd 2	type Standard	result 1	date 2024-02-23	rnd 1	type Standard	result 1
		Opponent Lungani, A (Avuyile)				Opponent Qana, K (Katleho)
2	5	Tournament Mzansi Interprovincial Youth Chess Championships 2024				Tournament NMBCU vs BCC Derby Chess Invitational 2025
		date 2024-12-19	rnd 7	type Standard	result 1	date 2025-01-11	rnd 4	type Standard	result 1
		Opponent Scholtz, M (Miche)				Opponent Adams, C (Ciara)
3	4	Tournament NMBCU Trial 5 2024				Tournament NMBCU Trial 5 2024
		date 2024-08-17	rnd 2	type Standard	result 1	date 2024-08-17	rnd 5	type Standard	result 0.5
		Opponent Murray, C (Chloe)				Opponent Chipunza, J (Jaden)

#	Games	Start				End
1	6	Tournament NMBCU Trials 1 2024				Tournament Pearson Open Chess Tournament 2024
		date 2024-02-16	rnd 2	type Standard	result 1	date 2024-02-23	rnd 1	type Standard	result 1
		Opponent Lungani, A (Avuyile)				Opponent Qana, K (Katleho)
2	5	Tournament Mzansi Interprovincial Youth Chess Championships 2024				Tournament NMBCU vs BCC Derby Chess Invitational 2025
		date 2024-12-19	rnd 7	type Standard	result 1	date 2025-01-11	rnd 4	type Standard	result 1
		Opponent Scholtz, M (Miche)				Opponent Adams, C (Ciara)
3	4	Tournament NMBCU Trial 5 2024				Tournament NMBCU Trial 5 2024
		date 2024-08-17	rnd 2	type Standard	result 1	date 2024-08-17	rnd 5	type Standard	result 0.5
		Opponent Murray, C (Chloe)				Opponent Chipunza, J (Jaden)

#	Games	Start				End
1	2	Tournament 2022 Madibaz Tournament				Tournament 2022 Madibaz Tournament
		date 2022-09-10	rnd 3	type Rapid	result 0.5	date 2022-09-10	rnd 4	type Rapid	result 1
		Opponent Boggenpoel, L (Levi)				Opponent Boggenpoel, L (Levi)
2	1	Tournament Grey Junior School Chess Team Championship 2024				Tournament Grey Junior School Chess Team Championship 2024
		date 2024-11-02	rnd 4	type Rapid	result 1	date 2024-11-02	rnd 4	type Rapid	result 1
		Opponent Van Der Berg, B (Bradley)				Opponent Van Der Berg, B (Bradley)
3	1	Tournament 2022 Madibaz Tournament				Tournament 2022 Madibaz Tournament
		date 2022-09-10	rnd 6	type Rapid	result 1	date 2022-09-10	rnd 6	type Rapid	result 1
		Opponent Buckner, C (Connor)				Opponent Buckner, C (Connor)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament NMBCU Trials 1 2024				Tournament Pearson Open Chess Tournament 2024
		date 2024-02-16	rnd 4	type Standard	result 1	date 2024-02-23	rnd 1	type Standard	result 1
		Opponent Botes, E (E-Jay)				Opponent Qana, K (Katleho)
2	3	Tournament FIDE in the Bay 2025				Tournament EC Closed 2025
		date 2025-08-30	rnd 3	type Standard	result 1	date 2025-09-06	rnd 1	type Standard	result 1
		Opponent Mantutle, B (Bokang)				Opponent Nkompeni, K (Khayakazi)
3	3	Tournament Ty's Winter Classic 2025				Tournament Ty's Winter Classic 2025
		date 2025-06-27	rnd 4	type Standard	result 1	date 2025-06-28	rnd 6	type Standard	result 1
		Opponent Armstrong, K (Kristin)				Opponent Armstrong, I (Isabella)

#	Games	Start				End
1	4	Tournament NMBCU Trials 1 2024				Tournament Pearson Open Chess Tournament 2024
		date 2024-02-16	rnd 4	type Standard	result 1	date 2024-02-23	rnd 1	type Standard	result 1
		Opponent Botes, E (E-Jay)				Opponent Qana, K (Katleho)
2	3	Tournament FIDE in the Bay 2025				Tournament EC Closed 2025
		date 2025-08-30	rnd 3	type Standard	result 1	date 2025-09-06	rnd 1	type Standard	result 1
		Opponent Mantutle, B (Bokang)				Opponent Nkompeni, K (Khayakazi)
3	3	Tournament Ty's Winter Classic 2025				Tournament Ty's Winter Classic 2025
		date 2025-06-27	rnd 4	type Standard	result 1	date 2025-06-28	rnd 6	type Standard	result 1
		Opponent Armstrong, K (Kristin)				Opponent Armstrong, I (Isabella)

#	Games	Start				End
1	1	Tournament Grey Junior School Chess Team Championship 2024				Tournament Grey Junior School Chess Team Championship 2024
		date 2024-11-02	rnd 4	type Rapid	result 1	date 2024-11-02	rnd 4	type Rapid	result 1
		Opponent Van Der Berg, B (Bradley)				Opponent Van Der Berg, B (Bradley)
2	1	Tournament 2022 Madibaz Tournament				Tournament 2022 Madibaz Tournament
		date 2022-09-10	rnd 6	type Rapid	result 1	date 2022-09-10	rnd 6	type Rapid	result 1
		Opponent Buckner, C (Connor)				Opponent Buckner, C (Connor)
3	1	Tournament 2022 Madibaz Tournament				Tournament 2022 Madibaz Tournament
		date 2022-09-10	rnd 4	type Rapid	result 1	date 2022-09-10	rnd 4	type Rapid	result 1
		Opponent Boggenpoel, L (Levi)				Opponent Boggenpoel, L (Levi)

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	Murray ,C (Chloe)	11	5	-38.6	11	5	-38.6	0	0	0	0	0	0
1	Murray ,C (Chloe)	11	1262	1223.4	11	1261.2	1223.4	0	0	0	0	0	0
2	Nell ,C (Chelsea Jane)	11	0	-425	10	0	-425	1	0	-425	0	0	0
2	Nell ,C (Chelsea Jane)	11	1456.7	1031.7	10	1442.4	1031.7	1	1236.3	1031.7	0	0	0
3	Adams ,C (Ciara)	9	1	-330.6	9	1	-330.6	0	0	0	0	0	0
3	Adams ,C (Ciara)	9	1288.3	957.8	9	1292.1	957.8	0	0	0	0	0	0
4	Prinsloo ,L (Liam)	8	0.5	-371.9	6	0.5	-354.2	2	0	-425	0	0	0
4	Prinsloo ,L (Liam)	8	1205.4	833.5	6	1257.6	851.2	2	1146	780.4	0	0	0
5	Arbi ,I (Imaan)	7	3	-60.7	7	3	-60.7	0	0	0	0	0	0
5	Arbi ,I (Imaan)	7	1239.7	1179	7	1242.9	1179	0	0	0	0	0	0
6	Driscoll ,S (Samuel)	6	0	-425	6	0	-425	0	0	0	0	0	0
6	Driscoll ,S (Samuel)	6	1633.2	1208.2	6	1633	1208.2	0	0	0	0	0	0
7	Wessels ,F (Francois)	5	1	-255	5	1	-255	0	0	0	0	0	0
7	Wessels ,F (Francois)	5	1229.2	974.2	5	1243	974.2	0	0	0	0	0	0
8	Swartz ,JZ (Jane Zavier)	5	3	85	4	2	0	1	1	425	0	0	0
8	Swartz ,JZ (Jane Zavier)	5	1236	1321	4	1199.5	1236	1	1332.8	1661	0	0	0
9	Mouton ,W (Wyatt)	4	2	0	4	2	0	0	0	0	0	0	0
9	Mouton ,W (Wyatt)	4	1164.5	1164.5	4	1176.6	1164.5	0	0	0	0	0	0
10	Mclachlan ,G (Geoffrey)	4	0	-425	4	0	-425	0	0	0	0	0	0
10	Mclachlan ,G (Geoffrey)	4	1510.3	1085.3	4	1520.4	1085.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Grobler, M (Mia)

Ratings

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Last 24 raw ratings

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Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms