Chess South Africa Ratings Database

PLAYER PAGE

Personal

Crone, DRM (David Roiben Michael)

Chess SA id

1750104117

FIDE id

Date of birth

1975-09-03 (Adult)

Gender

Male

Region

Nelson Mandela Bay (ENM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2018-12-01

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1313.2	1327.4	1300	1300
Raw rating	1313.2	1327.4	1300	1300
Weighted rating	1312.9	1327.1	1299.7	1299.7
Weighted performance	0	0	0	0
Floor	813.2	827.4	800	800
K-factor	36	36	36	36
Min/Max rating change allowed	141.1	138.3	143.8	143.8
Highest rating	1313.2 2024-02-01	1327.4 2024-02-01	1300 2024-02-01	1300 2024-02-01
Highest raw rating	1313.2 2024-02-01	1327.4 2024-02-01	1300 2024-02-01	1300 2024-02-01
Highest weighted rating	1310.5 2025-08-01	1324.5 2025-08-01	1296.7 2025-08-01	1296.7 2025-08-01
Highest weighted performance	1309.4 2018-12-01	1306 2018-12-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1313.2	1327.4	1300	1300
Analysis
Rating	1313.2	1327.4	1300	1300
Raw rating	1313.2	1327.4	1300	1300
Weighted rating	1312.9	1327.1	1299.7
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	813.2	827.4	800	800
Max/Min rating change allowed	141.1	138.3	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	1313.2	1327.4	1300	1300
New weighted rating	1313.2	1327.4	1300	1300
New weighted performance	0	0	0	0
Temp new rating	1313.2	1327.4	1300	1300
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1313.2	1327.4	1300	1300
New K-factor	36	36	36	36
New floor	813.2	827.4	800	800

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

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Nelson Mandela Bay (ENM)
Province	Eastern Cape (EC)
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	5	4	80	255	1054.4	1309.4
Standard	5	4	80	255	1054.4	1309.4
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1313.2	1327.4	1300	1300
2025-09-30	1313.2	1327.4	1300	1300
2025-09-01	1313.2	1327.4	1300	1300
2025-08-01	1313.2	1327.4	1300	1300
2025-07-01	1313.2	1327.4	1300	1300
2025-06-01	1313.2	1327.4	1300	1300
2025-05-01	1313.2	1327.4	1300	1300
2025-04-01	1313.2	1327.4	1300	1300
2025-03-01	1313.2	1327.4	1300	1300
2025-02-01	1313.2	1327.4	1300	1300
2025-01-01	1313.2	1327.4	1300	1300
2024-12-01	1313.2	1327.4	1300	1300
2024-11-01	1313.2	1327.4	1300	1300
2024-10-01	1313.2	1327.4	1300	1300
2024-09-01	1313.2	1327.4	1300	1300
2024-08-01	1313.2	1327.4	1300	1300
2024-07-01	1313.2	1327.4	1300	1300
2024-09-01	1313.2	1327.4	1300	1300
2024-05-01	1313.2	1327.4	1300	1300
2024-04-01	1313.2	1327.4	1300	1300
2024-03-01	1313.2	1327.4	1300	1300
2024-02-01	1313.2	1327.4	1300	1300
2024-01-01	1313.2	1327.4	1300	1300
2023-12-01	1232.2	1241.2	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	Ultimate Chess Open 2018 (D)	2018-12-01	2018-12-01	Standard	Nelson Mandela Bay (ENM)	5	5	4	Yes	Analysis

#	Games	Start				End
1	3	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 1	type Standard	result 1	date 2018-12-01	rnd 3	type Standard	result 1
		Opponent Van Der Merwe, E (Eric)				Opponent Abercrombie, R (Ruth)
2	1	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 5	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Pienaar, K (Kevin)				Opponent Pienaar, K (Kevin)

#	Games	Start				End
1	3	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 1	type Standard	result 1	date 2018-12-01	rnd 3	type Standard	result 1
		Opponent Van Der Merwe, E (Eric)				Opponent Abercrombie, R (Ruth)
2	1	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 5	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Pienaar, K (Kevin)				Opponent Pienaar, K (Kevin)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 1	type Standard	result 1	date 2018-12-01	rnd 3	type Standard	result 1
		Opponent Van Der Merwe, E (Eric)				Opponent Abercrombie, R (Ruth)
2	1	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 5	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Pienaar, K (Kevin)				Opponent Pienaar, K (Kevin)

#	Games	Start				End
1	3	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 1	type Standard	result 1	date 2018-12-01	rnd 3	type Standard	result 1
		Opponent Van Der Merwe, E (Eric)				Opponent Abercrombie, R (Ruth)
2	1	Tournament Ultimate Chess Open 2018				Tournament Ultimate Chess Open 2018
		date 2018-12-01	rnd 5	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Pienaar, K (Kevin)				Opponent Pienaar, K (Kevin)

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 Der Merwe ,E (Eric)	1	1	425	1	1	425	0	0	0	0	0	0
1	Van Der Merwe ,E (Eric)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
2	Abercrombie ,KV (Keith Vernin)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Abercrombie ,KV (Keith Vernin)	1	1200	775	1	1200	775	0	0	0	0	0	0
3	Pienaar ,K (Kevin)	1	1	425	1	1	425	0	0	0	0	0	0
3	Pienaar ,K (Kevin)	1	1106.6	1531.6	1	1154.8	1531.6	0	0	0	0	0	0
4	Nevin ,M (Mariaan)	1	1	425	1	1	425	0	0	0	0	0	0
4	Nevin ,M (Mariaan)	1	565.2	990.2	1	500	990.2	0	0	0	0	0	0
5	Abercrombie ,R (Ruth)	1	1	425	1	1	425	0	0	0	0	0	0
5	Abercrombie ,R (Ruth)	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

Notifications

PLAYER PAGE

Personal

Crone, DRM (David Roiben Michael)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms