Chess South Africa Ratings Database

PLAYER PAGE

Personal

Duma, S (Sibonelo)

Chess SA id

190092520

FIDE id

Date of birth

1990-04-12 (Adult)

Gender

Male

Region

Ethekwini (KED)

Citizen

RSA

Titles

Chess SA registered

Last active game

2019-12-06

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1635.8	1585.2	1372.4	1347.1
Raw rating	1635.8	1585.2	1372.4	1347.1
Weighted rating	1633.8	1583.7	1371.3	1346.9
Weighted performance	354.5	292.2	0	0
Floor	1135.8	1085.2	872.4	847.1
K-factor	28	32	36	36
Min/Max rating change allowed	89.1	95.8	129.7	134.5
Highest rating	1830.8 2018-07-01	1826.2 2018-07-01	1485.4 2019-02-01	1387 2019-10-01
Highest raw rating	1635.8 2024-02-01	1585.2 2024-02-01	1372.4 2024-02-01	1347.1 2024-02-01
Highest weighted rating	1629.2 2025-08-01	1580.1 2025-08-01	1368.7 2025-08-01	1346.3 2025-08-01
Highest weighted performance	1830.8 2018-07-01	1826.2 2018-07-01	1485.4 2019-02-01	1387 2019-10-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1635.8	1585.2	1372.4	1347.1
Analysis
Rating	1635.8	1585.2	1372.4	1347.1
Raw rating	1635.8	1585.2	1372.4	1347.1
Weighted rating	1633.8	1583.7	1371.3
Weighted performance	354.5	292.2	0
K-factor	28	32	36	36
Floor	1135.8	1085.2	872.4	847.1
Max/Min rating change allowed	89.1	95.8	129.7	134.5
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	1635.8	1585.2	1372.4	1347.1
New weighted rating	1635.1	1584.7	1372	1347
New weighted performance	354	291.7	0	0
Temp new rating	1635.8	1585.2	1372.4	1347.1
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1635.8	1585.2	1372.4	1347.1
New K-factor	28	32	36	36
New floor	1135.8	1085.2	872.4	847.1

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
History	99	69	4	26

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Ethekwini (KED)
Province	KwaZulu Natal (KZ)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	85	51	60	85	1443	1528
Standard	55	33.5	60.91	92.7	1447.8	1540.5
Rapid	4	3	75	212.5	1365.3	1577.8
Blitz	26	14.5	55.77	49	1444.9	1493.9

Date	Main	Standard	Rapid	Blitz
2025-09-30	1635.8	1585.2	1372.4	1347.1
2025-09-01	1635.8	1585.2	1372.4	1347.1
2025-08-01	1635.8	1585.2	1372.4	1347.1
2025-07-01	1635.8	1585.2	1372.4	1347.1
2025-06-01	1635.8	1585.2	1372.4	1347.1
2025-05-01	1635.8	1585.2	1372.4	1347.1
2025-04-01	1635.8	1585.2	1372.4	1347.1
2025-03-01	1635.8	1585.2	1372.4	1347.1
2025-02-01	1635.8	1585.2	1372.4	1347.1
2025-01-01	1635.8	1585.2	1372.4	1347.1
2024-12-01	1635.8	1585.2	1372.4	1347.1
2024-11-01	1635.8	1585.2	1372.4	1347.1
2024-10-01	1635.8	1585.2	1372.4	1347.1
2024-09-01	1635.8	1585.2	1372.4	1347.1
2024-08-01	1635.8	1585.2	1372.4	1347.1
2024-07-01	1635.8	1585.2	1372.4	1347.1
2024-06-01	1635.8	1585.2	1372.4	1347.1
2024-08-01	1635.8	1585.2	1372.4	1347.1
2024-04-01	1635.8	1585.2	1372.4	1347.1
2024-03-01	1635.8	1585.2	1372.4	1347.1
2024-02-01	1635.8	1585.2	1372.4	1347.1
2024-01-01	1635.8	1585.2	1372.4	1347.1
2023-12-01	1438.5	1430	1260	1321
2023-11-01	1438.5	1430	1260	1321

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2019 USSA Championships (Open)	2019-12-02	2019-12-06	Standard	Sarah Baartman (ESB)	9	9	4	Yes	Analysis
2	2019 USSA Championships (Blitz)	2019-12-04	2019-12-04	Blitz	Sarah Baartman (ESB)	9	9	4	Yes	Analysis
3	2019 DCC Third Swiss	2019-10-10	2019-11-21	Standard	Ethekwini (KED)	6	4	1	Yes	Analysis
4	2019 Darryl Mhlongo Blitz	2019-10-03	2019-10-03	Blitz	Ethekwini (KED)	8	8	5	Yes	Analysis
5	2019 John Blackburn Memorial Swiss	2019-08-01	2019-09-19	Standard	Ethekwini (KED)	7	5	3	Yes	Analysis
6	2019 Durban Chess Club Championship (C)	2019-03-14	2019-05-09	Standard	Ethekwini (KED)	9	6	5	Yes	Analysis
7	2019 Ethekwini Open (A)	2019-03-30	2019-03-31	Standard	Ethekwini (KED)	6	5	4	Yes	Analysis
8	2019 Ethekwini Club Challenge	2019-02-24	2019-02-24	Rapid	Ethekwini (KED)	6	4	3	Yes	Analysis
9	2018 Durban CC Third Swiss	2018-10-11	2018-11-15	Standard	Ethekwini (KED)	6	5	2	Yes	Analysis
10	2018 Mhlongo Memorial Blitz	2018-10-04	2018-10-04	Blitz	Ethekwini (KED)	9	9	5.5	Yes	Analysis
11	2018 Ethekwini League	2018-09-09	2018-10-21	Standard	Ethekwini (KED)	7	5	2.5	Yes	Analysis
12	2018 John Blackburn Memorial	2018-08-02	2018-09-27	Standard	Ethekwini (KED)	7	7	6	Yes	Analysis
13	2018 USSA Championship (Open)	2018-07-02	2018-07-06	Standard	Gert Sibande (MGS)	9	9	6	Yes	Analysis

#	Games	Start				End
1	8	Tournament 2018 John Blackburn Memorial				Tournament 2018 Mhlongo Memorial Blitz
		date 2018-09-13	rnd 5	type Standard	result 1	date 2018-10-04	rnd 4	type Blitz	result 0.5
		Opponent Du Preez, JL (Johannes)				Opponent Oliver, HN (Henry)
2	5	Tournament 2019 Durban Chess Club Championship				Tournament 2019 John Blackburn Memorial Swiss
		date 2019-04-18	rnd 6	type Standard	result 1	date 2019-08-01	rnd 1	type Standard	result 1
		Opponent Pillai, N (Nanditha)				Opponent Singh, J (Joshi)
3	5	Tournament 2019 Ethekwini Open				Tournament 2019 Durban Chess Club Championship
		date 2019-03-30	rnd 3	type Standard	result 1	date 2019-04-04	rnd 4	type Standard	result 1
		Opponent Ntuli, SB (Siphesihle)				Opponent Seebran, N (Nitesh)

#	Games	Start				End
1	6	Tournament 2018 John Blackburn Memorial				Tournament 2018 Durban CC Third Swiss
		date 2018-09-13	rnd 5	type Standard	result 1	date 2018-10-18	rnd 2	type Standard	result 1
		Opponent Du Preez, JL (Johannes)				Opponent Govender, L (Lesharn)
2	5	Tournament 2019 Durban Chess Club Championship				Tournament 2019 John Blackburn Memorial Swiss
		date 2019-04-18	rnd 6	type Standard	result 1	date 2019-08-01	rnd 1	type Standard	result 1
		Opponent Pillai, N (Nanditha)				Opponent Singh, J (Joshi)
3	5	Tournament 2019 Ethekwini Open				Tournament 2019 Durban Chess Club Championship
		date 2019-03-30	rnd 3	type Standard	result 1	date 2019-04-04	rnd 4	type Standard	result 1
		Opponent Ntuli, SB (Siphesihle)				Opponent Seebran, N (Nitesh)

#	Games	Start				End
1	2	Tournament 2019 Ethekwini Club Challenge				Tournament 2019 Ethekwini Club Challenge
		date 2019-02-24	rnd 5	type Rapid	result 1	date 2019-02-24	rnd 6	type Rapid	result 1
		Opponent Rooplal, D (Desmond)				Opponent Ndunakazi, NP (Nobuhle)
2	1	Tournament 2019 Ethekwini Club Challenge				Tournament 2019 Ethekwini Club Challenge
		date 2019-02-24	rnd 1	type Rapid	result 1	date 2019-02-24	rnd 1	type Rapid	result 1
		Opponent Ngubo, S (Samkelo)				Opponent Ngubo, S (Samkelo)

#	Games	Start				End
1	4	Tournament 2018 Mhlongo Memorial Blitz				Tournament 2018 Mhlongo Memorial Blitz
		date 2018-10-04	rnd 1	type Blitz	result 1	date 2018-10-04	rnd 4	type Blitz	result 0.5
		Opponent Khawula, W (Welile)				Opponent Oliver, HN (Henry)
2	3	Tournament 2019 Darryl Mhlongo Blitz				Tournament 2019 Darryl Mhlongo Blitz
		date 2019-10-03	rnd 2	type Blitz	result 1	date 2019-10-03	rnd 4	type Blitz	result 1
		Opponent Sithole, S (Sibonelo)				Opponent Yusuf, Z (Zain)
3	2	Tournament 2019 Darryl Mhlongo Blitz				Tournament 2019 USSA Championships
		date 2019-10-03	rnd 8	type Blitz	result 1	date 2019-12-04	rnd 1	type Blitz	result 1
		Opponent Thebe, A (Andile)				Opponent Sikwati, L (Lizo)

#	Games	Start				End
1	7	Tournament 2018 John Blackburn Memorial				Tournament 2018 Mhlongo Memorial Blitz
		date 2018-09-13	rnd 5	type Standard	result 1	date 2018-10-04	rnd 3	type Blitz	result 1
		Opponent Du Preez, JL (Johannes)				Opponent Msimango, S (Senzo)
2	5	Tournament 2019 Durban Chess Club Championship				Tournament 2019 John Blackburn Memorial Swiss
		date 2019-04-18	rnd 6	type Standard	result 1	date 2019-08-01	rnd 1	type Standard	result 1
		Opponent Pillai, N (Nanditha)				Opponent Singh, J (Joshi)
3	5	Tournament 2019 Ethekwini Open				Tournament 2019 Durban Chess Club Championship
		date 2019-03-30	rnd 3	type Standard	result 1	date 2019-04-04	rnd 4	type Standard	result 1
		Opponent Ntuli, SB (Siphesihle)				Opponent Seebran, N (Nitesh)

#	Games	Start				End
1	6	Tournament 2018 John Blackburn Memorial				Tournament 2018 Durban CC Third Swiss
		date 2018-09-13	rnd 5	type Standard	result 1	date 2018-10-18	rnd 2	type Standard	result 1
		Opponent Du Preez, JL (Johannes)				Opponent Govender, L (Lesharn)
2	5	Tournament 2019 Durban Chess Club Championship				Tournament 2019 John Blackburn Memorial Swiss
		date 2019-04-18	rnd 6	type Standard	result 1	date 2019-08-01	rnd 1	type Standard	result 1
		Opponent Pillai, N (Nanditha)				Opponent Singh, J (Joshi)
3	5	Tournament 2019 Ethekwini Open				Tournament 2019 Durban Chess Club Championship
		date 2019-03-30	rnd 3	type Standard	result 1	date 2019-04-04	rnd 4	type Standard	result 1
		Opponent Ntuli, SB (Siphesihle)				Opponent Seebran, N (Nitesh)

#	Games	Start				End
1	2	Tournament 2019 Ethekwini Club Challenge				Tournament 2019 Ethekwini Club Challenge
		date 2019-02-24	rnd 5	type Rapid	result 1	date 2019-02-24	rnd 6	type Rapid	result 1
		Opponent Rooplal, D (Desmond)				Opponent Ndunakazi, NP (Nobuhle)
2	1	Tournament 2019 Ethekwini Club Challenge				Tournament 2019 Ethekwini Club Challenge
		date 2019-02-24	rnd 1	type Rapid	result 1	date 2019-02-24	rnd 1	type Rapid	result 1
		Opponent Ngubo, S (Samkelo)				Opponent Ngubo, S (Samkelo)

#	Games	Start				End
1	3	Tournament 2019 Darryl Mhlongo Blitz				Tournament 2019 Darryl Mhlongo Blitz
		date 2019-10-03	rnd 2	type Blitz	result 1	date 2019-10-03	rnd 4	type Blitz	result 1
		Opponent Sithole, S (Sibonelo)				Opponent Yusuf, Z (Zain)
2	3	Tournament 2018 Mhlongo Memorial Blitz				Tournament 2018 Mhlongo Memorial Blitz
		date 2018-10-04	rnd 1	type Blitz	result 1	date 2018-10-04	rnd 3	type Blitz	result 1
		Opponent Khawula, W (Welile)				Opponent Msimango, S (Senzo)
3	2	Tournament 2019 Darryl Mhlongo Blitz				Tournament 2019 USSA Championships
		date 2019-10-03	rnd 8	type Blitz	result 1	date 2019-12-04	rnd 1	type Blitz	result 1
		Opponent Thebe, A (Andile)				Opponent Sikwati, L (Lizo)

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	Makhathini ,X (Xolani)	3	3	425	2	2	425	0	0	0	1	1	425
1	Makhathini ,X (Xolani)	3	1235	1660	2	1197.1	1660	0	0	0	1	1136.4	1660
2	Mkhaliphi ,B (Bandile)	3	3	425	2	2	425	0	0	0	1	1	425
2	Mkhaliphi ,B (Bandile)	3	1171.2	1596.2	2	1168.8	1596.2	0	0	0	1	1200	1596.2
3	Pillai ,N (Nanditha)	2	1	0	2	1	0	0	0	0	0	0	0
3	Pillai ,N (Nanditha)	2	1187.4	1187.4	2	1180.4	1187.4	0	0	0	0	0	0
4	Seebran ,N (Nitesh)	2	2	425	2	2	425	0	0	0	0	0	0
4	Seebran ,N (Nitesh)	2	1134.8	1559.8	2	1109.6	1559.8	0	0	0	0	0	0
5	Soojay ,J (Jorah)	2	1	0	2	1	0	0	0	0	0	0	0
5	Soojay ,J (Jorah)	2	1428.6	1428.6	2	1429.8	1428.6	0	0	0	0	0	0
6	Kumarasamy ,D (Daaruk)	2	1	0	2	1	0	0	0	0	0	0	0
6	Kumarasamy ,D (Daaruk)	2	1333.8	1333.8	2	1323.9	1333.8	0	0	0	0	0	0
7	Rooplal ,D (Desmond)	2	1	0	1	0	-425	1	1	425	0	0	0
7	Rooplal ,D (Desmond)	2	1662.3	1662.3	1	1693.3	1237.3	1	1682.3	2087.3	0	0	0
8	Danisa ,CT (Cyril Thanda)	2	0	-425	1	0	-425	0	0	0	1	0	-425
8	Danisa ,CT (Cyril Thanda)	2	1783.1	1358.1	1	1802.2	1358.1	0	0	0	1	1840.6	1358.1
9	Madiya ,S (Sisekelo)	2	0	-425	1	0	-425	0	0	0	1	0	-425
9	Madiya ,S (Sisekelo)	2	1229.6	804.6	1	1242.4	804.6	0	0	0	1	1200	804.6
10	Thebe ,A (Andile)	2	1	0	1	0	-425	0	0	0	1	1	425
10	Thebe ,A (Andile)	2	1325.6	1325.6	1	1258.3	900.6	0	0	0	1	1285.6	1750.6

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Duma, S (Sibonelo)

Ratings

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Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms