Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jacobs, D (Duan)

Chess SA id

105013333

FIDE id

Date of birth

2005-05-03 (Adult)

Gender

Male

Region

Lejweleputswa (FLW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-01-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1221.1	1222.7	1104.3	1104.3
Raw rating	1221.1	1222.7	1104.3	1104.3
Weighted rating	1221.1	1222.7	1104.3	1104.3
Weighted performance	288.8	288.5	0	0
Floor	721.1	722.7	604.3	604.3
K-factor	36	36	40	40
Min/Max rating change allowed	160.9	160.5	190	190
Highest rating	1221.1 2024-02-01	1222.7 2024-02-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1221.1 2024-02-01	1222.7 2024-02-01	1104.3 2024-02-01	1104.3 2024-02-01
Highest weighted rating	1221.1 2024-02-01	1222.7 2025-02-01	1104.3 2024-11-01	1104.3 2024-11-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1221.1	1222.7	1104.3	1104.3
Analysis
Rating	1221.1	1222.7	1104.3	1104.3
Raw rating	1221.1	1222.7	1104.3	1104.3
Weighted rating	1221.1	1222.7	1104.3
Weighted performance	288.8	288.5	0
K-factor	36	36	40	40
Floor	721.1	722.7	604.3	604.3
Max/Min rating change allowed	160.9	160.5	190	190
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	1221.1	1222.7	1104.3	1104.3
New weighted rating	1221.1	1222.7	1104.3	1104.3
New weighted performance	288.4	288.1	0	0
Temp new rating	1221.1	1222.7	1104.3	1104.3
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1221.1	1222.7	1104.3	1104.3
New K-factor	36	36	40	40
New floor	721.1	722.7	604.3	604.3

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	329	320	1	8

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Lejweleputswa (FLW)
Province	Free State (FS)
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	79	47	59.49	80.7	1026.2	1106.9
Standard	79	47	59.49	80.7	1026.2	1106.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1221.1	1222.7	1104.3	1104.3
2025-09-01	1221.1	1222.7	1104.3	1104.3
2025-08-01	1221.1	1222.7	1104.3	1104.3
2025-07-01	1221.1	1222.7	1104.3	1104.3
2025-06-01	1221.1	1222.7	1104.3	1104.3
2025-05-01	1221.1	1222.7	1104.3	1104.3
2025-04-01	1221.1	1222.7	1104.3	1104.3
2025-03-01	1221.1	1222.7	1104.3	1104.3
2025-02-01	1221.1	1222.7	1104.3	1104.3
2025-01-01	1221.1	1222.7	1104.3	1104.3
2024-12-01	1221.1	1222.7	1104.3	1104.3
2024-11-01	1221.1	1222.7	1104.3	1104.3
2024-10-01	1221.1	1222.7	1104.3	1104.3
2024-09-01	1221.1	1222.7	1104.3	1104.3
2024-08-01	1221.1	1222.7	1104.3	1104.3
2024-07-01	1221.1	1222.7	1104.3	1104.3
2024-06-01	1221.1	1222.7	1104.3	1104.3
2024-08-01	1221.1	1222.7	1104.3	1104.3
2024-04-01	1221.1	1222.7	1104.3	1104.3
2024-03-01	1221.1	1222.7	1104.3	1104.3
2024-02-01	1221.1	1222.7	1104.3	1104.3
2024-01-01	1221.1	1222.7	1104.3	1104.3
2023-12-01	1221.1	1222.7	1104.3	1104.3
2023-11-01	1221.1	1222.7	1104.3	1104.3

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 South African Junior Team Championships (U16B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	5	Yes	Analysis
2	Lejweleputswa 7th Qualifying Swiss Open Tournament 2019 (Open)	2019-06-15	2019-06-15	Standard	Lejweleputswa (FLW)	5	5	2.5	Yes	Analysis
3	Lejweleputswa 6th Qualifying Swiss Open Tournament 2019 (A)	2019-05-25	2019-05-25	Standard	Lejweleputswa (FLW)	5	5	2.5	Yes	Analysis
4	Lejweleputswa 4th Qualifying Swiss Open Tournament 2019 (B)	2019-03-16	2019-03-16	Standard	Lejweleputswa (FLW)	5	5	3	Yes	Analysis
5	Lejweleputswa 2nd Qualifying Swiss Open Tournament 2019 (B)	2019-01-26	2019-01-26	Standard	Lejweleputswa (FLW)	5	5	2.5	Yes	Analysis
6	South African Junior Team Championships 2018 (U14D)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
7	South African Open 2018 (C)	2018-07-11	2018-07-13	Standard	Mangaung (FMB)	6	6	4	Yes	Analysis
8	Inter Regional 2018 (U14 Team)	2018-05-04	2018-05-05	Standard	Frances Baard (NCF)	5	5	1	Yes	Analysis
9	Lejweleputswa 6th Qualifying Swiss Open Tournament 2018 (C)	2018-05-26	2018-05-26	Standard	Lejweleputswa (FLW)	5	5	2.5	Yes	Analysis
10	Lejweleputswa 5th Qualifying Swiss Open Tournament 2018 (U14)	2018-04-21	2018-04-21	Standard	Lejweleputswa (FLW)	5	5	4	Yes	Analysis
11	Lejweleputswa 3rd Qualifying Swiss Open Tournament 2018 (U14)	2018-02-24	2018-02-24	Standard	Lejweleputswa (FLW)	5	5	5	Yes	Analysis
12	Lejweleputswa 2nd Qualifying Swiss Open Tournament 2018 (A)	2018-01-27	2018-01-27	Standard	Lejweleputswa (FLW)	5	5	2.5	Yes	Analysis
13	South African Junior Wildcard Championships 2017 (U14 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
14	South African Junior Team Championships 2017 (U14D)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	4.5	Yes	Analysis

#	Games	Start				End
1	10	Tournament Lejweleputswa 2nd Qualifying Swiss Open Tournament 2018				Tournament Lejweleputswa 5th Qualifying Swiss Open Tournament 2018
		date 2018-01-27	rnd 3	type Standard	result 1	date 2018-04-21	rnd 2	type Standard	result 1
		Opponent Motlalane, T (Tumelo)				Opponent Mansill, R (Regan)
2	7	Tournament Lejweleputswa 6th Qualifying Swiss Open Tournament 2018				Tournament South African Open 2018
		date 2018-05-26	rnd 3	type Standard	result 1	date 2018-07-12	rnd 4	type Standard	result 1
		Opponent Promnitz, G (Geoffrey)				Opponent Jongbloed, C (Chad)
3	5	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-08	rnd 7	type Standard	result 1
		Opponent Chibisa, T (Takudzwa)				Opponent Du Preez, K (Katrien)

#	Games	Start				End
1	10	Tournament Lejweleputswa 2nd Qualifying Swiss Open Tournament 2018				Tournament Lejweleputswa 5th Qualifying Swiss Open Tournament 2018
		date 2018-01-27	rnd 3	type Standard	result 1	date 2018-04-21	rnd 2	type Standard	result 1
		Opponent Motlalane, T (Tumelo)				Opponent Mansill, R (Regan)
2	7	Tournament Lejweleputswa 6th Qualifying Swiss Open Tournament 2018				Tournament South African Open 2018
		date 2018-05-26	rnd 3	type Standard	result 1	date 2018-07-12	rnd 4	type Standard	result 1
		Opponent Promnitz, G (Geoffrey)				Opponent Jongbloed, C (Chad)
3	5	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-08	rnd 7	type Standard	result 1
		Opponent Chibisa, T (Takudzwa)				Opponent Du Preez, K (Katrien)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament Lejweleputswa 3rd Qualifying Swiss Open Tournament 2018				Tournament Lejweleputswa 5th Qualifying Swiss Open Tournament 2018
		date 2018-02-24	rnd 1	type Standard	result 1	date 2018-04-21	rnd 2	type Standard	result 1
		Opponent Haji-Varnavas, G (Guiliana)				Opponent Mansill, R (Regan)
2	5	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-08	rnd 7	type Standard	result 1
		Opponent Chibisa, T (Takudzwa)				Opponent Du Preez, K (Katrien)
3	4	Tournament South African Open 2018				Tournament South African Open 2018
		date 2018-07-11	rnd 1	type Standard	result 1	date 2018-07-12	rnd 4	type Standard	result 1
		Opponent Janse Van Vuuren, J (Janus)				Opponent Jongbloed, C (Chad)

#	Games	Start				End
1	7	Tournament Lejweleputswa 3rd Qualifying Swiss Open Tournament 2018				Tournament Lejweleputswa 5th Qualifying Swiss Open Tournament 2018
		date 2018-02-24	rnd 1	type Standard	result 1	date 2018-04-21	rnd 2	type Standard	result 1
		Opponent Haji-Varnavas, G (Guiliana)				Opponent Mansill, R (Regan)
2	5	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-05	rnd 3	type Standard	result 1	date 2020-01-08	rnd 7	type Standard	result 1
		Opponent Chibisa, T (Takudzwa)				Opponent Du Preez, K (Katrien)
3	4	Tournament South African Open 2018				Tournament South African Open 2018
		date 2018-07-11	rnd 1	type Standard	result 1	date 2018-07-12	rnd 4	type Standard	result 1
		Opponent Janse Van Vuuren, J (Janus)				Opponent Jongbloed, C (Chad)

No games found.

#	Games	Start				End

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	Daniel ,CV (Christiaan Victor)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
1	Daniel ,CV (Christiaan Victor)	3	1139.9	1139.9	3	1139.2	1139.9	0	0	0	0	0	0
2	Pillay ,D (Diveshan)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
2	Pillay ,D (Diveshan)	3	977.7	977.7	3	984.8	977.7	0	0	0	0	0	0
3	Mokhoera ,KB (Keamogecoe Boitumelo)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
3	Mokhoera ,KB (Keamogecoe Boitumelo)	3	1235.9	1235.9	3	1237.1	1235.9	0	0	0	0	0	0
4	Motlalane ,T (Tumelo)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Motlalane ,T (Tumelo)	2	1047.3	1259.8	2	1044.7	1259.8	0	0	0	0	0	0
5	Swart ,D (Dian)	2	2	425	2	2	425	0	0	0	0	0	0
5	Swart ,D (Dian)	2	824.8	1249.8	2	827.9	1249.8	0	0	0	0	0	0
6	Du Toit ,JP (Johannes Petrus)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
6	Du Toit ,JP (Johannes Petrus)	2	1064.4	1276.9	2	1062.1	1276.9	0	0	0	0	0	0
7	Masuku ,M (Mxolosi)	2	1	0	2	1	0	0	0	0	0	0	0
7	Masuku ,M (Mxolosi)	2	968.9	968.9	2	975.3	968.9	0	0	0	0	0	0
8	Ntsileng ,SR (Sebaga Reneilwe)	1	1	425	1	1	425	0	0	0	0	0	0
8	Ntsileng ,SR (Sebaga Reneilwe)	1	1352.5	1777.5	1	1363.9	1777.5	0	0	0	0	0	0
9	Haji-Varnavas ,G (Guiliana)	1	1	425	1	1	425	0	0	0	0	0	0
9	Haji-Varnavas ,G (Guiliana)	1	570.2	995.2	1	583.6	995.2	0	0	0	0	0	0
10	Hendricks ,UO (Uziel Oray)	1	1	425	1	1	425	0	0	0	0	0	0
10	Hendricks ,UO (Uziel Oray)	1	637.9	1062.9	1	624.8	1062.9	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

Jacobs, D (Duan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms