Chess South Africa Ratings Database

PLAYER PAGE

Personal

Greyling, D (Duncan)

Chess SA id

1060096801

FIDE id

Date of birth

2006-11-14 (U20)

Gender

Male

Region

Ekurhuleni (GE)

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	1311.9	1307.8	1200	1200
Raw rating	1311.9	1307.8	1200	1200
Weighted rating	1311.9	1307.8	1200	1200
Weighted performance	342	341	0	0
Floor	893.3	886.6	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	141.4	142.2	165.8	165.8
Highest rating	1408.4 2019-10-01	1401.7 2019-10-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1393.3 2020-01-01	1386.6 2020-01-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1393.3 2021-07-01	1386.6 2021-07-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1408.4 2019-10-01	1401.7 2019-10-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1311.9	1307.8	1200	1200
Analysis
Rating	1311.9	1307.8	1200	1200
Raw rating	1311.9	1307.8	1200	1200
Weighted rating	1311.9	1307.8	1200
Weighted performance	342	341	0
K-factor	36	36	36	36
Floor	893.3	886.6	700	700
Max/Min rating change allowed	141.4	142.2	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	1311.9	1307.8	1200	1200
New weighted rating	1311.9	1307.8	1200	1200
New weighted performance	341.6	340.5	0	0
Temp new rating	1311.9	1307.8	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1311.9	1307.8	1200	1200
New K-factor	36	36	36	36
New floor	893.3	886.6	700	700

Item	Main	Standard
	0	0
	0	0
	0	0
	0	0
	0	0
	0	0
History	100	100

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U20
Region	Ekurhuleni (GE)
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	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	100	54	54	34	1031.1	1065.1
Standard	100	54	54	34	1031.1	1065.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1311.9	1307.8	1200	1200
2025-09-01	1311.9	1307.8	1200	1200
2025-08-01	1311.9	1307.8	1200	1200
2025-07-01	1311.9	1307.8	1200	1200
2025-06-01	1311.9	1307.8	1200	1200
2025-05-01	1311.9	1307.8	1200	1200
2025-04-01	1311.9	1307.8	1200	1200
2025-03-01	1311.9	1307.8	1200	1200
2025-02-01	1311.9	1307.8	1200	1200
2025-01-01	1311.9	1307.8	1200	1200
2024-12-01	1311.9	1307.8	1200	1200
2024-11-01	1311.9	1307.8	1200	1200
2024-10-01	1311.9	1307.8	1200	1200
2024-09-01	1311.9	1307.8	1200	1200
2024-08-01	1311.9	1307.8	1200	1200
2024-07-01	1311.9	1307.8	1200	1200
2024-06-01	1311.9	1307.8	1200	1200
2024-08-01	1311.9	1307.8	1200	1200
2024-04-01	1311.9	1307.8	1200	1200
2024-03-01	1311.9	1307.8	1200	1200
2024-02-01	1311.9	1307.8	1200	1200
2024-01-01	1311.9	1307.8	1200	1200
2023-12-01	1311.9	1307.8	1200	1200
2023-11-01	1311.9	1307.8	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	2019 South African Junior Team Championships (U14B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
2	GE vs GSV Inter Regional 2019 (U14A)	2019-10-26	2019-10-26	Standard	Ekurhuleni (GE)	5	5	5	Yes	Analysis
3	2019 Gauteng School League Finals (U13 Open)	2019-08-23	2019-08-23	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
4	Springs Open 2019 (C)	2019-08-31	2019-08-31	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
5	Ekurhuleni Trials (3)	2019-06-08	2019-06-08	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
6	Ekurhuleni South School Chess 2019 (U13 Boys)	2019-05-11	2019-05-11	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
7	Ekurhuleni Trials 2 2019 (U14)	2019-04-27	2019-04-27	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	2018 Wild Card Chess Championships (U14 Open)	2018-12-21	2018-12-24	Standard	4 Knights (4K)	7	7	2	Yes	Analysis
9	South African Junior Team Championships 2018 (U14E)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	7	Yes	Analysis
10	2018 Interregion Sedibeng vs Ekurhuleni (J)	2018-11-03	2018-11-03	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
11	Inter Region GE vs JHB Metro 2018 (U14E)	2018-10-06	2018-10-06	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis
12	Ekurhuleni Open 2018 (C)	2018-08-18	2018-08-18	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
13	Witfield Open 2018 (C)	2018-07-21	2018-07-21	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
14	Boksburg Chess Club Open 2018 (U14)	2018-07-14	2018-07-14	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
15	Ekurhuleni Trials 2 2018 (U14)	2018-04-21	2018-04-21	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
16	Human Rights Day Open 2018 (C)	2018-03-21	2018-03-21	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
17	Ekurhuleni Trials 1 2018 (U14)	2018-03-10	2018-03-10	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
18	Elspark Open 2018 (C)	2018-02-10	2018-02-10	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
19	Brakpan Open 2018 (C)	2018-02-24	2018-02-24	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

#	Games	Start				End
1	10	Tournament 2018 Interregion Sedibeng vs Ekurhuleni				Tournament South African Junior Team Championships 2018
		date 2018-11-03	rnd 3	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Human, PMB (Petrus)				Opponent Richards, E (Ezekiel)
2	6	Tournament Springs Open 2019				Tournament GE vs GSV Inter Regional 2019
		date 2019-08-31	rnd 5	type Standard	result 1	date 2019-10-26	rnd 5	type Standard	result 1
		Opponent Naidoo, D (Devolan)				Opponent Eberwein, HJ (Heinrich)
3	5	Tournament Ekurhuleni Trials				Tournament 2019 Gauteng School League Finals
		date 2019-06-08	rnd 4	type Standard	result 0.5	date 2019-08-23	rnd 3	type Standard	result 1
		Opponent Kruger, C (Cornelius)				Opponent Jonker, J (Jaen-Pierre)

#	Games	Start				End
1	10	Tournament 2018 Interregion Sedibeng vs Ekurhuleni				Tournament South African Junior Team Championships 2018
		date 2018-11-03	rnd 3	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Human, PMB (Petrus)				Opponent Richards, E (Ezekiel)
2	6	Tournament Springs Open 2019				Tournament GE vs GSV Inter Regional 2019
		date 2019-08-31	rnd 5	type Standard	result 1	date 2019-10-26	rnd 5	type Standard	result 1
		Opponent Naidoo, D (Devolan)				Opponent Eberwein, HJ (Heinrich)
3	5	Tournament Ekurhuleni Trials				Tournament 2019 Gauteng School League Finals
		date 2019-06-08	rnd 4	type Standard	result 0.5	date 2019-08-23	rnd 3	type Standard	result 1
		Opponent Kruger, C (Cornelius)				Opponent Jonker, J (Jaen-Pierre)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-16	rnd 1	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Villoen, M (Marcel)				Opponent Richards, E (Ezekiel)
2	6	Tournament Springs Open 2019				Tournament GE vs GSV Inter Regional 2019
		date 2019-08-31	rnd 5	type Standard	result 1	date 2019-10-26	rnd 5	type Standard	result 1
		Opponent Naidoo, D (Devolan)				Opponent Eberwein, HJ (Heinrich)
3	4	Tournament Ekurhuleni Trials				Tournament 2019 Gauteng School League Finals
		date 2019-06-08	rnd 5	type Standard	result 1	date 2019-08-23	rnd 3	type Standard	result 1
		Opponent Sweeting, L (Leila)				Opponent Jonker, J (Jaen-Pierre)

#	Games	Start				End
1	7	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-16	rnd 1	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Villoen, M (Marcel)				Opponent Richards, E (Ezekiel)
2	6	Tournament Springs Open 2019				Tournament GE vs GSV Inter Regional 2019
		date 2019-08-31	rnd 5	type Standard	result 1	date 2019-10-26	rnd 5	type Standard	result 1
		Opponent Naidoo, D (Devolan)				Opponent Eberwein, HJ (Heinrich)
3	4	Tournament Ekurhuleni Trials				Tournament 2019 Gauteng School League Finals
		date 2019-06-08	rnd 5	type Standard	result 1	date 2019-08-23	rnd 3	type Standard	result 1
		Opponent Sweeting, L (Leila)				Opponent Jonker, J (Jaen-Pierre)

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 Niekerk ,LA (Lee Ann)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
1	Van Niekerk ,LA (Lee Ann)	4	877.8	1090.3	4	872.9	1090.3	0	0	0	0	0	0
2	Greyling ,S (Schalk)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
2	Greyling ,S (Schalk)	3	1178.1	1036.4	3	1174.7	1036.4	0	0	0	0	0	0
3	Jonker ,J (Jaen-Pierre)	2	2	425	2	2	425	0	0	0	0	0	0
3	Jonker ,J (Jaen-Pierre)	2	1244.3	1669.3	2	1240.9	1669.3	0	0	0	0	0	0
4	Sweeting ,L (Leila)	2	1	0	2	1	0	0	0	0	0	0	0
4	Sweeting ,L (Leila)	2	1094.1	1094.1	2	1086.8	1094.1	0	0	0	0	0	0
5	Attwell ,R (Rowan)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Attwell ,R (Rowan)	2	777.2	352.2	2	785.8	352.2	0	0	0	0	0	0
6	Van Rhyn ,J (Josh)	2	1	0	2	1	0	0	0	0	0	0	0
6	Van Rhyn ,J (Josh)	2	967.2	967.2	2	967.1	967.2	0	0	0	0	0	0
7	Richards ,E (Ezekiel)	2	2	425	2	2	425	0	0	0	0	0	0
7	Richards ,E (Ezekiel)	2	993.1	1418.1	2	810.8	1418.1	0	0	0	0	0	0
8	Arries ,G (Gerswin)	2	2	425	2	2	425	0	0	0	0	0	0
8	Arries ,G (Gerswin)	2	1015.2	1440.2	2	977	1440.2	0	0	0	0	0	0
9	De Villiers ,E (Ethan)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	De Villiers ,E (Ethan)	2	1072.8	647.8	2	1077.2	647.8	0	0	0	0	0	0
10	Alho ,M (Mario)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Alho ,M (Mario)	2	980.6	555.6	2	966	555.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Greyling, D (Duncan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms