Chess South Africa Ratings Database

PLAYER PAGE

Personal

Muller, J (Jaco)

Chess SA id

1070191998

FIDE id

Date of birth

2007-02-09 (U20)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-02-22

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1240.6	1244.4	1200	1200
Raw rating	1239.3	1243	1200	1200
Weighted rating	1240.6	1244.4	1200	1200
Weighted performance	0	0	0	0
Floor	746.8	751.2	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	156.8	156	165.8	165.8
Highest rating	1456.3 2024-02-01	1433.8 2024-02-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1246.8 2024-03-01	1251.2 2024-03-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1246.8 2024-10-01	1251.2 2024-10-01	1200 2024-02-01	1200 2024-02-01
Highest weighted performance	1456.3 2024-02-01	1433.8 2024-02-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.1	0.2	0	0
New rating	1240.7	1244.6	1200	1200
Analysis
Rating	1240.6	1244.4	1200	1200
Raw rating	1239.3	1243	1200	1200
Weighted rating	1240.6	1244.4	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	746.8	751.2	700	700
Max/Min rating change allowed	156.8	156	165.8	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	1239.3	1243	1200	1200
New weighted rating	1240.7	1244.6	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1240.7	1244.6	1200	1200
Temp new rating +/-	0.1	0.2	0	0
Final new rating +/-	0.1	0.2	0	0
New rating	1240.7	1244.6	1200	1200
New K-factor	36	36	36	36
New floor	746.8	751.2	700	700

Item	Main	Standard
	0	0
	5	5
	5	5
	0	0
	0	0
	0	0
History	10	10

Games since
	Main 10	Standard 10		Rapid 0		Blitz 0
Gender	Male
Age group	U20
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	5	2	40	-85	1102.3	1017.3
Standard	5	2	40	-85	1102.3	1017.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	10	6	60	85	1146.1	1231.1
Standard	10	6	60	85	1146.1	1231.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1239.3	1243	1200	1200
2025-09-30	1239.3	1243	1200	1200
2025-09-01	1239.3	1243	1200	1200
2025-08-01	1239.3	1243	1200	1200
2025-07-01	1238.7	1242.3	1200	1200
2025-06-01	1237.9	1241.5	1200	1200
2025-05-01	1237.1	1240.6	1200	1200
2025-04-01	1236.1	1239.4	1200	1200
2025-03-01	1233.2	1236.1	1200	1200
2025-02-01	1246.8	1251.2	1200	1200
2025-01-01	1246.8	1251.2	1200	1200
2024-12-01	1246.8	1251.2	1200	1200
2024-11-01	1246.8	1251.2	1200	1200
2024-10-01	1246.8	1251.2	1200	1200
2024-09-01	1246.8	1251.2	1200	1200
2024-08-01	1246.8	1251.2	1200	1200
2024-07-01	1246.8	1251.2	1200	1200
2024-09-01	1246.8	1251.2	1200	1200
2024-05-01	1246.8	1251.2	1200	1200
2024-04-01	1246.8	1251.2	1200	1200
2024-03-01	1246.8	1251.2	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	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	Grey College Team Championship 2025 (B)	2025-02-21	2025-02-22	Standard	Mangaung (FMB)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Grey College Team Championship 2025 (B)	2025-02-21	2025-02-22	Standard	Mangaung (FMB)	5	5	2	Yes	Analysis
2	Grey College Team Championship 2024 (B)	2024-02-23	2024-02-24	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis

#	Games	Start				End
1	5	Tournament Grey College Team Championship 2024				Tournament Grey College Team Championship 2025
		date 2024-02-23	rnd 2	type Standard	result 1	date 2025-02-21	rnd 1	type Standard	result 1
		Opponent Masango, L (Lala)				Opponent Cloete, A (Allison)
2	1	Tournament Grey College Team Championship 2025				Tournament Grey College Team Championship 2025
		date 2025-02-22	rnd 4	type Standard	result 1	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Musa, L (Lebohang)				Opponent Musa, L (Lebohang)

#	Games	Start				End
1	5	Tournament Grey College Team Championship 2024				Tournament Grey College Team Championship 2025
		date 2024-02-23	rnd 2	type Standard	result 1	date 2025-02-21	rnd 1	type Standard	result 1
		Opponent Masango, L (Lala)				Opponent Cloete, A (Allison)
2	1	Tournament Grey College Team Championship 2025				Tournament Grey College Team Championship 2025
		date 2025-02-22	rnd 4	type Standard	result 1	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Musa, L (Lebohang)				Opponent Musa, L (Lebohang)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Grey College Team Championship 2024				Tournament Grey College Team Championship 2025
		date 2024-02-23	rnd 2	type Standard	result 1	date 2025-02-21	rnd 1	type Standard	result 1
		Opponent Masango, L (Lala)				Opponent Cloete, A (Allison)
2	1	Tournament Grey College Team Championship 2025				Tournament Grey College Team Championship 2025
		date 2025-02-22	rnd 4	type Standard	result 1	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Musa, L (Lebohang)				Opponent Musa, L (Lebohang)

#	Games	Start				End
1	5	Tournament Grey College Team Championship 2024				Tournament Grey College Team Championship 2025
		date 2024-02-23	rnd 2	type Standard	result 1	date 2025-02-21	rnd 1	type Standard	result 1
		Opponent Masango, L (Lala)				Opponent Cloete, A (Allison)
2	1	Tournament Grey College Team Championship 2025				Tournament Grey College Team Championship 2025
		date 2025-02-22	rnd 4	type Standard	result 1	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Musa, L (Lebohang)				Opponent Musa, L (Lebohang)

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	Van Heerden ,F (Freddie)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Van Heerden ,F (Freddie)	1	1338.6	913.6	1	1321.9	913.6	0	0	0	0	0	0
2	Chhetri ,N (Nischiit Khatry)	1	1	425	1	1	425	0	0	0	0	0	0
2	Chhetri ,N (Nischiit Khatry)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Masango ,L (Lala)	1	1	425	1	1	425	0	0	0	0	0	0
3	Masango ,L (Lala)	1	1108.7	1533.7	1	1102.1	1533.7	0	0	0	0	0	0
4	Govender ,T (Tristan)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Govender ,T (Tristan)	1	1188.9	763.9	1	1177.9	763.9	0	0	0	0	0	0
5	Melville ,J (Joalize)	1	1	425	1	1	425	0	0	0	0	0	0
5	Melville ,J (Joalize)	1	1102	1527	1	1013.8	1527	0	0	0	0	0	0
6	Rossouw ,M (Michiel)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Rossouw ,M (Michiel)	1	1123.9	698.9	1	1112	698.9	0	0	0	0	0	0
7	Cloete ,A (Allison)	1	1	425	1	1	425	0	0	0	0	0	0
7	Cloete ,A (Allison)	1	802.4	1227.4	1	880.5	1227.4	0	0	0	0	0	0
8	Mabule ,B (Botshelo)	1	1	425	1	1	425	0	0	0	0	0	0
8	Mabule ,B (Botshelo)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Prinsloo ,P (Phoenix)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Prinsloo ,P (Phoenix)	1	1196.4	771.4	1	1200	771.4	0	0	0	0	0	0
10	Musa ,L (Lebohang)	1	1	425	1	1	425	0	0	0	0	0	0
10	Musa ,L (Lebohang)	1	1200	1625	1	1200	1625	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

Muller, J (Jaco)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms