Chess South Africa Ratings Database

PLAYER PAGE

Personal

Diederiks, J (Jaco)

Chess SA id

163093184

FIDE id

Date of birth

1963-05-27 (Adult)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-06-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1396.4	1407.2	1300	1300
Raw rating	1396.4	1407.2	1300	1300
Weighted rating	1391.6	1401.1	1299	1299
Weighted performance	0	0	0	0
Floor	896.4	907.2	800	800
K-factor	36	32	36	36
Min/Max rating change allowed	125.3	123.4	143.8	143.8
Highest rating	1437.3 2018-03-01	1435.4 2018-03-01	1300 2024-02-01	1300 2024-02-01
Highest raw rating	1396.4 2024-07-01	1407.2 2024-07-01	1300 2024-02-01	1300 2024-02-01
Highest weighted rating	1386.5 2025-08-01	1395.4 2025-08-01	1296.7 2025-08-01	1296.7 2025-08-01
Highest weighted performance	1437.3 2018-03-01	1435.4 2018-03-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1396.4	1407.2	1300	1300
Analysis
Rating	1396.4	1407.2	1300	1300
Raw rating	1396.4	1407.2	1300	1300
Weighted rating	1391.6	1401.1	1299
Weighted performance	0	0	0
K-factor	36	32	36	36
Floor	896.4	907.2	800	800
Max/Min rating change allowed	125.3	123.4	143.8	143.8
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	1396.4	1407.2	1300	1300
New weighted rating	1393.3	1403.1	1299.7	1299.7
New weighted performance	0	0	0	0
Temp new rating	1396.4	1407.2	1300	1300
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1396.4	1407.2	1300	1300
New K-factor	36	32	36	36
New floor	896.4	907.2	800	800

Item	Main	Standard
	0	0
	0	0
	5	5
	0	0
	0	0
	0	0
History	16	16

Games since
	Main 5	Standard 5		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Johannesburg Metro (GJM)
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	-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	11	5	45.45	-38.6	1515.8	1477.1
Standard	11	5	45.45	-38.6	1515.8	1477.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1396.4	1407.2	1300	1300
2025-09-01	1396.4	1407.2	1300	1300
2025-08-01	1396.4	1407.2	1300	1300
2025-07-01	1396.4	1407.2	1300	1300
2025-06-01	1396.4	1407.2	1300	1300
2025-05-01	1396.4	1407.2	1300	1300
2025-04-01	1396.4	1407.2	1300	1300
2025-03-01	1396.4	1407.2	1300	1300
2025-02-01	1396.4	1407.2	1300	1300
2025-01-01	1396.4	1407.2	1300	1300
2024-12-01	1396.4	1407.2	1300	1300
2024-11-01	1396.4	1407.2	1300	1300
2024-10-01	1396.4	1407.2	1300	1300
2024-09-01	1396.4	1407.2	1300	1300
2024-08-01	1396.4	1407.2	1300	1300
2024-07-01	1396.4	1407.2	1300	1300
2024-06-01	1368	1368	1300	1300
2024-08-01	1368	1368	1300	1300
2024-04-01	1368	1368	1300	1300
2024-03-01	1368	1368	1300	1300
2024-02-01	1368	1368	1300	1300
2024-01-01	1368	1368	1300	1300
2023-12-01	1228.2	1229.6	1200	1200
2023-11-01	1228.2	1229.6	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	FIDE in the West 2024 (Open)	2024-06-08	2024-06-08	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
2	Randburg Club - Summer Swiss 2018	2018-01-30	2018-03-13	Standard	Johannesburg Metro (GJM)	7	6	2	Yes	Analysis

#	Games	Start				End
1	2	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 4	type Standard	result 1	date 2024-06-08	rnd 5	type Standard	result 1
		Opponent Hennings, B (Bevan)				Opponent Nkabinde, L (Lwazi)
2	2	Tournament Randburg Club - Summer Swiss 2018				Tournament Randburg Club - Summer Swiss 2018
		date 2018-02-13	rnd 3	type Standard	result 1	date 2018-02-20	rnd 4	type Standard	result 1
		Opponent Buckland, IP (Ivan)				Opponent Snyckers, A (Adam)
3	1	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 2	type Standard	result 1	date 2024-06-08	rnd 2	type Standard	result 1
		Opponent Molao, R (Rethabile)				Opponent Molao, R (Rethabile)

#	Games	Start				End
1	2	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 4	type Standard	result 1	date 2024-06-08	rnd 5	type Standard	result 1
		Opponent Hennings, B (Bevan)				Opponent Nkabinde, L (Lwazi)
2	2	Tournament Randburg Club - Summer Swiss 2018				Tournament Randburg Club - Summer Swiss 2018
		date 2018-02-13	rnd 3	type Standard	result 1	date 2018-02-20	rnd 4	type Standard	result 1
		Opponent Buckland, IP (Ivan)				Opponent Snyckers, A (Adam)
3	1	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 2	type Standard	result 1	date 2024-06-08	rnd 2	type Standard	result 1
		Opponent Molao, R (Rethabile)				Opponent Molao, R (Rethabile)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 4	type Standard	result 1	date 2024-06-08	rnd 5	type Standard	result 1
		Opponent Hennings, B (Bevan)				Opponent Nkabinde, L (Lwazi)
2	2	Tournament Randburg Club - Summer Swiss 2018				Tournament Randburg Club - Summer Swiss 2018
		date 2018-02-13	rnd 3	type Standard	result 1	date 2018-02-20	rnd 4	type Standard	result 1
		Opponent Buckland, IP (Ivan)				Opponent Snyckers, A (Adam)
3	1	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 2	type Standard	result 1	date 2024-06-08	rnd 2	type Standard	result 1
		Opponent Molao, R (Rethabile)				Opponent Molao, R (Rethabile)

#	Games	Start				End
1	2	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 4	type Standard	result 1	date 2024-06-08	rnd 5	type Standard	result 1
		Opponent Hennings, B (Bevan)				Opponent Nkabinde, L (Lwazi)
2	2	Tournament Randburg Club - Summer Swiss 2018				Tournament Randburg Club - Summer Swiss 2018
		date 2018-02-13	rnd 3	type Standard	result 1	date 2018-02-20	rnd 4	type Standard	result 1
		Opponent Buckland, IP (Ivan)				Opponent Snyckers, A (Adam)
3	1	Tournament FIDE in the West 2024				Tournament FIDE in the West 2024
		date 2024-06-08	rnd 2	type Standard	result 1	date 2024-06-08	rnd 2	type Standard	result 1
		Opponent Molao, R (Rethabile)				Opponent Molao, R (Rethabile)

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	Kleyn ,AE (Andrew Edward)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Kleyn ,AE (Andrew Edward)	1	1818.2	1393.2	1	1818.4	1393.2	0	0	0	0	0	0
2	Hennings ,B (Bevan)	1	1	425	1	1	425	0	0	0	0	0	0
2	Hennings ,B (Bevan)	1	1204.9	1629.9	1	1203.7	1629.9	0	0	0	0	0	0
3	Essop ,R (Rashied)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Essop ,R (Rashied)	1	1467.5	1042.5	1	1456	1042.5	0	0	0	0	0	0
4	Buckland ,IP (Ivan Paul)	1	1	425	1	1	425	0	0	0	0	0	0
4	Buckland ,IP (Ivan Paul)	1	1423	1848	1	1423	1848	0	0	0	0	0	0
5	Essop ,H (Haroon)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Essop ,H (Haroon)	1	1420	995	1	1420	995	0	0	0	0	0	0
6	Snyckers ,A (Adam)	1	1	425	1	1	425	0	0	0	0	0	0
6	Snyckers ,A (Adam)	1	1207.9	1632.9	1	1207.9	1632.9	0	0	0	0	0	0
7	Bornheim ,C (Craig)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Bornheim ,C (Craig)	1	2101.9	1676.9	1	2101.9	1676.9	0	0	0	0	0	0
8	Lefyedi ,T (Thatego)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Lefyedi ,T (Thatego)	1	1808.9	1383.9	1	1816.7	1383.9	0	0	0	0	0	0
9	Molao ,R (Rethabile)	1	1	425	1	1	425	0	0	0	0	0	0
9	Molao ,R (Rethabile)	1	1073.2	1498.2	1	1150.9	1498.2	0	0	0	0	0	0
10	Msebenzi ,V (Vusumzi)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Msebenzi ,V (Vusumzi)	1	1599.8	1174.8	1	1637.3	1174.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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Personal

Diederiks, 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