Chess South Africa Ratings Database

PLAYER PAGE

Personal

Commerford, J (Jeffrey)

Chess SA id

1560159289

FIDE id

Date of birth

1956-02-01 (Adult)

Gender

Male

Region

West Rand (GWR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-12-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1464	1466.4	1200	1200
Raw rating	1457.3	1454.6	1200	1200
Weighted rating	1464	1466.4	1200	1200
Weighted performance	1289.4	1283.4	0	0
Floor	994	996.9	700	700
K-factor	32	32	36	36
Min/Max rating change allowed	114.9	115.4	165.8	165.8
Highest rating	1509.8 2024-09-01	1512.8 2024-09-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1494 2024-10-01	1496.9 2024-10-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1464 2026-01-01	1466.4 2026-01-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1509.8 2024-09-01	1512.8 2024-09-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	2.3	1.8	0	0
New rating	1466.3	1468.2	1200	1200
Analysis
Rating	1464	1466.4	1200	1200
Raw rating	1457.3	1454.6	1200	1200
Weighted rating	1464	1466.4	1200
Weighted performance	1289.4	1283.4	0
K-factor	32	32	36	36
Floor	994	996.9	700	700
Max/Min rating change allowed	114.9	115.4	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	1457.3	1454.6	1200	1200
New weighted rating	1466.3	1468.2	1200	1200
New weighted performance	1280	1274	0	0
Temp new rating	1466.3	1468.2	1200	1200
Temp new rating +/-	2.3	1.8	0	0
Final new rating +/-	2.3	1.8	0	0
New rating	1466.3	1468.2	1200	1200
New K-factor	32	32	36	36
New floor	994	996.9	700	700

Item	Main	Standard
	0	0
	0	0
	25	25
	10	10
	0	0
	0	0
History	35	35

Games since
	Main 30	Standard 30		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	West Rand (GWR)
Province	Gauteng (GT)
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	1362		494		38
Male	1148		410		32
Adult	412		151		5
Adult Male	381		141		5
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	35	20	57.14	60.7	1403.5	1464.2
Standard	35	20	57.14	60.7	1403.5	1464.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1457.3	1454.6	1200	1200
2025-11-30	1477.8	1479.9	1200	1200
2025-11-01	1477.8	1479.9	1200	1200
2025-09-30	1477.8	1479.9	1200	1200
2025-09-01	1477.8	1479.9	1200	1200
2025-08-01	1477.8	1479.9	1200	1200
2025-07-01	1477.8	1479.9	1200	1200
2025-06-01	1477.8	1479.9	1200	1200
2025-05-01	1477.8	1479.9	1200	1200
2025-04-01	1477.8	1479.9	1200	1200
2025-03-01	1477.8	1479.9	1200	1200
2025-02-01	1477.8	1479.9	1200	1200
2025-01-01	1477.8	1479.9	1200	1200
2024-12-01	1494	1496.9	1200	1200
2024-11-01	1494	1496.9	1200	1200
2024-10-01	1494	1496.9	1200	1200
2024-09-01	1430.4	1432.8	1200	1200
2024-11-01	1430.4	1432.8	1200	1200
2024-07-01	1430.4	1432.8	1200	1200
2024-06-01	1281.6	1296.2	1200	1200
2024-05-01	1281.6	1296.2	1200	1200
2024-04-01	1249	1259.8	1200	1200
2024-03-01	1249	1259.8	1200	1200
2024-02-01	1249	1259.8	1200	1200

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	Gauteng Inter-Region at Emerald Resort 2025 (Adults+Seniors)	2025-12-06	2025-12-07	Standard	Sedibeng (GSV)	5	4	0.5	Yes	Analysis
2	Gauteng Inter-Region at UJ 2024 (Adult+Senior)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	2024 West Rand Adults 2.0	2024-09-24	2024-09-24	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
4	West Rand Adults 2024	2024-06-15	2024-06-15	Standard	West Rand (GWR)	5	5	3.5	Yes	Analysis
5	FIDE in the West 2024 (Open)	2024-06-08	2024-06-08	Standard	West Rand (GWR)	5	5	2.5	Yes	Analysis
6	2024 West Rand RHS Open (Open)	2024-04-13	2024-04-13	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
7	Gauteng Premier's Games West Rand 2023	2023-12-02	2023-12-02	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
8	West Rand at Bastion 2023 (Open)	2023-08-05	2023-08-05	Standard	West Rand (GWR)	5	5	2	Yes	Analysis

#	Games	Start				End
1	5	Tournament West Rand Adults 2024				Tournament 2024 West Rand Adults 2.0
		date 2024-06-15	rnd 5	type Standard	result 1	date 2024-09-24	rnd 4	type Standard	result 1
		Opponent Hough, J (Johan)				Opponent Odendaal, W (Willem)
2	4	Tournament FIDE in the West 2024				Tournament West Rand Adults 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-06-15	rnd 3	type Standard	result 0.5
		Opponent Van Rensburg, R (Rudy)				Opponent Phakathi, S (Siyinqaba)
3	3	Tournament Gauteng Premier's Games West Rand 2023				Tournament 2024 West Rand RHS Open
		date 2023-12-02	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Phakathi, S (Siyinqaba)				Opponent Visi, M (Moloko)

#	Games	Start				End
1	5	Tournament West Rand Adults 2024				Tournament 2024 West Rand Adults 2.0
		date 2024-06-15	rnd 5	type Standard	result 1	date 2024-09-24	rnd 4	type Standard	result 1
		Opponent Hough, J (Johan)				Opponent Odendaal, W (Willem)
2	4	Tournament FIDE in the West 2024				Tournament West Rand Adults 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-06-15	rnd 3	type Standard	result 0.5
		Opponent Van Rensburg, R (Rudy)				Opponent Phakathi, S (Siyinqaba)
3	3	Tournament Gauteng Premier's Games West Rand 2023				Tournament 2024 West Rand RHS Open
		date 2023-12-02	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Phakathi, S (Siyinqaba)				Opponent Visi, M (Moloko)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament West Rand Adults 2024				Tournament 2024 West Rand Adults 2.0
		date 2024-06-15	rnd 5	type Standard	result 1	date 2024-09-24	rnd 4	type Standard	result 1
		Opponent Hough, J (Johan)				Opponent Odendaal, W (Willem)
2	3	Tournament FIDE in the West 2024				Tournament West Rand Adults 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-06-15	rnd 2	type Standard	result 1
		Opponent Van Rensburg, R (Rudy)				Opponent Assabi, O (Ofer)
3	3	Tournament Gauteng Premier's Games West Rand 2023				Tournament 2024 West Rand RHS Open
		date 2023-12-02	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Phakathi, S (Siyinqaba)				Opponent Visi, M (Moloko)

#	Games	Start				End
1	5	Tournament West Rand Adults 2024				Tournament 2024 West Rand Adults 2.0
		date 2024-06-15	rnd 5	type Standard	result 1	date 2024-09-24	rnd 4	type Standard	result 1
		Opponent Hough, J (Johan)				Opponent Odendaal, W (Willem)
2	3	Tournament FIDE in the West 2024				Tournament West Rand Adults 2024
		date 2024-06-08	rnd 5	type Standard	result 1	date 2024-06-15	rnd 2	type Standard	result 1
		Opponent Van Rensburg, R (Rudy)				Opponent Assabi, O (Ofer)
3	3	Tournament Gauteng Premier's Games West Rand 2023				Tournament 2024 West Rand RHS Open
		date 2023-12-02	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Phakathi, S (Siyinqaba)				Opponent Visi, M (Moloko)

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 Rensburg ,R (Rudy)	2	2	425	2	2	425	0	0	0	0	0	0
1	Van Rensburg ,R (Rudy)	2	1285.1	1710.1	2	1289.6	1710.1	0	0	0	0	0	0
2	Hough ,J (Johan)	2	2	425	2	2	425	0	0	0	0	0	0
2	Hough ,J (Johan)	2	1221.7	1646.7	2	1226.4	1646.7	0	0	0	0	0	0
3	Makebe ,N (Neo)	2	2	425	2	2	425	0	0	0	0	0	0
3	Makebe ,N (Neo)	2	1169.8	1594.8	2	1163.7	1594.8	0	0	0	0	0	0
4	Phakathi ,S (Siyinqaba)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Phakathi ,S (Siyinqaba)	2	1377.2	1589.8	2	1414	1589.8	0	0	0	0	0	0
5	Hodgson ,TF (Timothy Fish)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Hodgson ,TF (Timothy Fish)	1	1643.1	1218.1	1	1580.8	1218.1	0	0	0	0	0	0
6	Maseko ,U (Unathi)	1	1	425	1	1	425	0	0	0	0	0	0
6	Maseko ,U (Unathi)	1	1531.2	1956.2	1	1530.5	1956.2	0	0	0	0	0	0
7	Lechalaba ,K (Kenneth)	1	1	425	1	1	425	0	0	0	0	0	0
7	Lechalaba ,K (Kenneth)	1	1177	1602	1	1177	1602	0	0	0	0	0	0
8	Minnaar ,JP (Jaun Pierre)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Minnaar ,JP (Jaun Pierre)	1	1599.3	1174.3	1	1592.1	1174.3	0	0	0	0	0	0
9	Mafabatho ,TH (Thapelo)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Mafabatho ,TH (Thapelo)	1	1542.2	1117.2	1	1636.1	1117.2	0	0	0	0	0	0
10	Assabi ,O (Ofer)	1	1	425	1	1	425	0	0	0	0	0	0
10	Assabi ,O (Ofer)	1	1568	1993	1	1573.3	1993	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

Commerford, J (Jeffrey)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms