Chess South Africa Ratings Database

PLAYER PAGE

Personal

Ndumela, B (Bulumko)

Chess SA id

2150153083

FIDE id

Date of birth

2015-02-22 (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

51.5

Junior GPX Points

1288.8

Item	Main	Standard	Rapid	Blitz
Rating	1443.1	1462.8	1322.7	1200
Raw rating	1443.1	1462.8	1318.2	1200
Weighted rating	1388.9	1396.6	1322.7	1200
Weighted performance	1430.6	1431.2	0	0
Floor	973.9	976	847.7	700
K-factor	32	32	36	36
Min/Max rating change allowed	117.3	114	140.1	165.8
Highest rating	1473.9 2025-06-01	1476 2025-06-01	1433.2 2024-08-01	1200 2018-10-01
Highest raw rating	1473.9 2025-06-01	1476 2025-06-01	1347.7 2024-09-01	1200 2024-03-01
Highest weighted rating	1388.9 2025-09-30	1396.6 2025-09-30	1318.2 2025-08-01	1200 2018-10-01
Highest weighted performance	1473.9 2025-06-01	1476 2024-05-01	1433.2 2024-08-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	1.6	0
New rating	1443.1	1462.8	1324.3	1200
Analysis
Rating	1443.1	1462.8	1322.7	1200
Raw rating	1443.1	1462.8	1318.2	1200
Weighted rating	1388.9	1396.6	1322.7
Weighted performance	1430.6	1431.2	0
K-factor	32	32	36	36
Floor	973.9	976	847.7	700
Max/Min rating change allowed	117.3	114	140.1	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	1443.1	1462.8	1318.2	1200
New weighted rating	1396.9	1405.9	1324.3	1200
New weighted performance	1430.1	1430.7	0	0
Temp new rating	1443.1	1462.8	1324.3	1200
Temp new rating +/-	0	0	1.6	0
Final new rating +/-	0	0	1.6	0
New rating	1443.1	1462.8	1324.3	1200
New K-factor	32	32	36	36
New floor	973.9	976	847.7	700

Item	Main	Standard	Rapid
	0	0	0
	56	50	6
	47	32	15
	23	18	5
	0	0	0
	0	0	0
History	126	100	26

Games since
	Main 103	Standard 82		Rapid 21		Blitz 0
Gender	Female
Age group	U12
Region	Sarah Baartman (ESB)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	1733		225		53
Female	262		31		8
U12	211		27		7
U12 Female	59		8		2
Standard
	RSA		Province		Region
Overall	1464		191		41
Female	225		25		6
U12	168		22		5
U12 Female	47		4		1
Rapid
	RSA		Province		Region
Overall	900		60		26
Female	151		10		8
U12	142		4		2
U12 Female	40		2		2
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	56	33.5	59.82	83.5	1278.5	1361.9
Standard	50	31	62	102	1279.9	1381.9
Rapid	6	2.5	41.67	-70.8	1266.3	1195.5
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	126	79	62.7	107.9	1234.7	1342.6
Standard	100	61.5	61.5	97.8	1247	1344.7
Rapid	26	17.5	67.31	147.1	1187.3	1334.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1443.1	1462.8	1318.2	1200
2025-09-01	1449.7	1476	1318.2	1200
2025-08-01	1449.7	1476	1318.2	1200
2025-07-01	1449.7	1476	1314.2	1200
2025-06-01	1473.9	1476	1347.7	1200
2025-05-01	1370.7	1382.5	1347.7	1200
2025-04-01	1325.3	1318.8	1347.7	1200
2025-03-01	1338.5	1328.5	1347.7	1200
2025-02-01	1370.9	1364.5	1347.7	1200
2025-01-01	1391.7	1388.4	1347.7	1200
2024-12-01	1391.7	1388.4	1347.7	1200
2024-11-01	1391.7	1388.4	1347.7	1200
2024-10-01	1391.7	1388.4	1347.7	1200
2024-09-01	1391.7	1388.4	1347.7	1200
2024-08-01	1377.2	1388.4	1308.5	1200
2024-07-01	1360	1372.9	1308.5	1200
2024-06-01	1359.4	1377.9	1308.5	1200
2024-08-01	1346.8	1368.3	1227.5	1200
2024-04-01	1299.1	1314.9	1212	1200
2024-03-01	1235.6	1240	1212	1200
2024-02-01	1154	1133.2	1212	1200
2024-01-01	1154	1133.2	1212	1200
2023-12-01	1154	1133.2	1212	1200
2023-11-01	1154	1133.2	1212	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	4	Yes	Analysis
2	Holiday Fever 2025 (C)	2025-06-21	2025-06-21	Rapid	Sarah Baartman (ESB)	10	6	2.5	Yes	Analysis
3	SBDCA Closed 2025 (U12 Girls)	2025-05-10	2025-05-10	Standard	Sarah Baartman (ESB)	6	6	6	Yes	Analysis
4	SBD Trials J Bay 19 April 2025 (U12)	2025-04-19	2025-04-19	Standard	Sarah Baartman (ESB)	6	6	4	Yes	Analysis
5	Kouga Mayor's Cup Final 2025 (U11)	2025-04-12	2025-04-12	Standard	Sarah Baartman (ESB)	6	6	4	Yes	Analysis
6	South African Junior Closed Chess Championships 2025 (U10 Girls)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4	Yes	Analysis
7	Kouga Mayor's Cup 2025 (U11)	2025-03-08	2025-03-08	Standard	Sarah Baartman (ESB)	6	6	3	Yes	Analysis
8	SBDCU Trials 3 2025 (U12)	2025-02-08	2025-02-08	Standard	Sarah Baartman (ESB)	6	6	3	Yes	Analysis
9	2025 SBDCU Trial 2 JBay (U12)	2025-01-25	2025-01-25	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	4	Yes	Analysis
2	Holiday Fever 2025 (C)	2025-06-21	2025-06-21	Rapid	Sarah Baartman (ESB)	10	6	2.5	Yes	Analysis
3	SBDCA Closed 2025 (U12 Girls)	2025-05-10	2025-05-10	Standard	Sarah Baartman (ESB)	6	6	6	Yes	Analysis
4	SBD Trials J Bay 19 April 2025 (U12)	2025-04-19	2025-04-19	Standard	Sarah Baartman (ESB)	6	6	4	Yes	Analysis
5	Kouga Mayor's Cup Final 2025 (U11)	2025-04-12	2025-04-12	Standard	Sarah Baartman (ESB)	6	6	4	Yes	Analysis
6	South African Junior Closed Chess Championships 2025 (U10 Girls)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4	Yes	Analysis
7	Kouga Mayor's Cup 2025 (U11)	2025-03-08	2025-03-08	Standard	Sarah Baartman (ESB)	6	6	3	Yes	Analysis
8	SBDCU Trials 3 2025 (U12)	2025-02-08	2025-02-08	Standard	Sarah Baartman (ESB)	6	6	3	Yes	Analysis
9	2025 SBDCU Trial 2 JBay (U12)	2025-01-25	2025-01-25	Standard	Sarah Baartman (ESB)	5	5	3	Yes	Analysis
10	Sarah Baartman District Schools Trials 2024 (U9 Girls)	2024-08-03	2024-08-03	Rapid	Sarah Baartman (ESB)	5	4	3.5	Yes	Analysis
11	SBDCU Closed Trials 2024 (U10 Girls)	2024-07-27	2024-07-27	Standard	Sarah Baartman (ESB)	5	4	4	Yes	Analysis
12	SBDCU Trial 3 2024 (U10)	2024-06-01	2024-06-01	Standard	Sarah Baartman (ESB)	5	5	3.5	Yes	Analysis
13	Fountains Mall 2024 (Development)	2024-05-18	2024-05-18	Standard	Sarah Baartman (ESB)	6	6	3	Yes	Analysis
14	Humansdorp CMC Schools Trials 2024 (U9 Girls)	2024-05-10	2024-05-10	Rapid	Sarah Baartman (ESB)	6	5	5	Yes	Analysis
15	Stulting Tournament 2024 (Junior)	2024-04-06	2024-04-06	Rapid	Sarah Baartman (ESB)	6	6	3.5	Yes	Analysis
16	Kouga Mayor's Cup Final 2024 (U9)	2024-04-13	2024-04-13	Standard	Sarah Baartman (ESB)	5	5	3.5	Yes	Analysis
17	Kouga Mayor's Cup 2024 (U9)	2024-03-09	2024-03-09	Standard	Sarah Baartman (ESB)	6	6	5	Yes	Analysis
18	SBDCU Trial 1 2024 (U10)	2024-02-24	2024-02-24	Standard	Sarah Baartman (ESB)	6	6	5	Yes	Analysis
19	Stulting Sportdag 2023 (Junior)	2023-08-25	2023-08-25	Rapid	Sarah Baartman (ESB)	5	5	3	Yes	Analysis
20	SBDCU Trial 3 2023 (U10)	2023-06-24	2023-06-24	Standard	Sarah Baartman (ESB)	7	7	3	Yes	Analysis
21	SBDCU Trial 2 2023 (U10)	2023-04-01	2023-04-01	Standard	Sarah Baartman (ESB)	5	5	2.5	Yes	Analysis
22	Kouga Mayor's Cup 2023 (U9)	2023-04-15	2023-04-15	Standard	Sarah Baartman (ESB)	6	6	1	Yes	Analysis

#	Games	Start				End
1	12	Tournament SBDCU Trial 3 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-06-01	rnd 2	type Standard	result 1	date 2024-08-03	rnd 5	type Rapid	result 1
		Opponent Petrus, I (Isabella)				Opponent Petrus, I (Isabella)
2	8	Tournament SBD Trials J Bay 19 April 2025				Tournament SBDCA Closed 2025
		date 2025-04-19	rnd 5	type Standard	result 1	date 2025-05-10	rnd 6	type Standard	result 1
		Opponent Ovayo, B (Bosi Sithembiso)				Opponent Titus, S (Sade Catherine)
3	8	Tournament Humansdorp CMC Schools Trials 2024				Tournament Fountains Mall 2024
		date 2024-05-10	rnd 2	type Rapid	result 1	date 2024-05-18	rnd 3	type Standard	result 1
		Opponent Swart, D (Daniella)				Opponent Krieger, N (Nate)

#	Games	Start				End
1	8	Tournament SBD Trials J Bay 19 April 2025				Tournament SBDCA Closed 2025
		date 2025-04-19	rnd 5	type Standard	result 1	date 2025-05-10	rnd 6	type Standard	result 1
		Opponent Ovayo, B (Bosi Sithembiso)				Opponent Titus, S (Sade Catherine)
2	8	Tournament SBDCU Trial 3 2024				Tournament SBDCU Closed Trials 2024
		date 2024-06-01	rnd 2	type Standard	result 1	date 2024-07-27	rnd 4	type Standard	result 1
		Opponent Petrus, I (Isabella)				Opponent Ndawana, E (Elimiyo)
3	6	Tournament Kouga Mayor's Cup 2024				Tournament Kouga Mayor's Cup Final 2024
		date 2024-03-09	rnd 5	type Standard	result 1	date 2024-04-13	rnd 4	type Standard	result 1
		Opponent Vermaak, R (Riaan Junior)				Opponent Swart, W (Waldemar)

#	Games	Start				End
1	11	Tournament Stulting Tournament 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-04-06	rnd 5	type Rapid	result 0.5	date 2024-08-03	rnd 5	type Rapid	result 1
		Opponent Marais, T (Taurin)				Opponent Petrus, I (Isabella)
2	3	Tournament Stulting Sportdag 2023				Tournament Stulting Sportdag 2023
		date 2023-08-25	rnd 2	type Rapid	result 1	date 2023-08-25	rnd 4	type Rapid	result 1
		Opponent Bredell, A (Alcapone)				Opponent Le Roux, H (Handre)
3	2	Tournament Holiday Fever 2025				Tournament Holiday Fever 2025
		date 2025-06-21	rnd 3	type Rapid	result 0.5	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Piko, L (Likhona)				Opponent Ntlomose, A (Andile)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament SBD Trials J Bay 19 April 2025				Tournament SBDCA Closed 2025
		date 2025-04-19	rnd 5	type Standard	result 1	date 2025-05-10	rnd 6	type Standard	result 1
		Opponent Ovayo, B (Bosi Sithembiso)				Opponent Titus, S (Sade Catherine)
2	8	Tournament Humansdorp CMC Schools Trials 2024				Tournament Fountains Mall 2024
		date 2024-05-10	rnd 2	type Rapid	result 1	date 2024-05-18	rnd 3	type Standard	result 1
		Opponent Swart, D (Daniella)				Opponent Krieger, N (Nate)
3	6	Tournament SBDCU Trial 1 2024				Tournament Kouga Mayor's Cup 2024
		date 2024-02-24	rnd 4	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent September, C (Connor)				Opponent Mgedle, L (Lulo)

#	Games	Start				End
1	8	Tournament SBD Trials J Bay 19 April 2025				Tournament SBDCA Closed 2025
		date 2025-04-19	rnd 5	type Standard	result 1	date 2025-05-10	rnd 6	type Standard	result 1
		Opponent Ovayo, B (Bosi Sithembiso)				Opponent Titus, S (Sade Catherine)
2	6	Tournament SBDCU Trial 1 2024				Tournament Kouga Mayor's Cup 2024
		date 2024-02-24	rnd 4	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent September, C (Connor)				Opponent Mgedle, L (Lulo)
3	4	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 4	type Standard	result 1
		Opponent Retief, M (Marize)				Opponent Ndawana, E (Elimiyo)

#	Games	Start				End
1	7	Tournament Stulting Tournament 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-04-06	rnd 6	type Rapid	result 1	date 2024-08-03	rnd 2	type Rapid	result 1
		Opponent Vermaak, R (Riaan Junior)				Opponent Retief, M (Marize)
2	3	Tournament Stulting Sportdag 2023				Tournament Stulting Sportdag 2023
		date 2023-08-25	rnd 2	type Rapid	result 1	date 2023-08-25	rnd 4	type Rapid	result 1
		Opponent Bredell, A (Alcapone)				Opponent Le Roux, H (Handre)
3	2	Tournament Sarah Baartman District Schools Trials 2024				Tournament Sarah Baartman District Schools Trials 2024
		date 2024-08-03	rnd 4	type Rapid	result 1	date 2024-08-03	rnd 5	type Rapid	result 1
		Opponent Herrington, M (Mia)				Opponent Petrus, I (Isabella)

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	Mfabana ,A (Alunamda)	5	2.5	0	5	2.5	0	0	0	0	0	0	0
1	Mfabana ,A (Alunamda)	5	1286.7	1286.7	5	1294.7	1286.7	0	0	0	0	0	0
2	Stofile ,I (Imkhitha Zidan)	4	2	0	4	2	0	0	0	0	0	0	0
2	Stofile ,I (Imkhitha Zidan)	4	1393.1	1393.1	4	1430.1	1393.1	0	0	0	0	0	0
3	Retief ,M (Marize)	4	4	425	3	3	425	1	1	425	0	0	0
3	Retief ,M (Marize)	4	1118.7	1543.7	3	1120.7	1543.7	1	1200	1543.7	0	0	0
4	Swart ,W (Waldemar)	4	1	-212.5	3	1	-141.7	1	0	-425	0	0	0
4	Swart ,W (Waldemar)	4	1388.4	1175.9	3	1393.7	1246.8	1	1199.2	963.4	0	0	0
5	Kettledas ,JF (Jerrin Fagan)	4	2	0	3	1	-141.7	1	1	425	0	0	0
5	Kettledas ,JF (Jerrin Fagan)	4	1127.1	1127.1	3	1129	985.4	1	1184.4	1552.1	0	0	0
6	Titus ,S (Sade Catherine)	4	1	-212.5	2	1	0	2	0	-425	0	0	0
6	Titus ,S (Sade Catherine)	4	1359.6	1147.1	2	1346.1	1359.6	2	1193.1	934.6	0	0	0
7	Mahlengele ,A (Akhanya)	3	2.5	283.3	3	2.5	283.3	0	0	0	0	0	0
7	Mahlengele ,A (Akhanya)	3	1157.8	1441.1	3	1159.7	1441.1	0	0	0	0	0	0
8	Bruton ,C (Caleb)	3	0	-425	3	0	-425	0	0	0	0	0	0
8	Bruton ,C (Caleb)	3	1499.6	1074.6	3	1506.7	1074.6	0	0	0	0	0	0
9	Lindiwe ,S (Somila)	3	3	425	3	3	425	0	0	0	0	0	0
9	Lindiwe ,S (Somila)	3	1178.6	1603.6	3	1172.2	1603.6	0	0	0	0	0	0
10	Viviers ,J (Juan)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
10	Viviers ,J (Juan)	3	1257.9	1116.3	3	1270.8	1116.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Ndumela, B (Bulumko)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms