Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grobbelaar, D (Devan)

Chess SA id

1090307053

FIDE id

Date of birth

2009-09-22 (U18)

Gender

Male

Region

Sarah Baartman (ESB)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-07-12

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1219.4

Item	Main	Standard	Rapid	Blitz
Rating	1249.7	1219.7	1254.2	1200
Raw rating	1249.7	1219.7	1254.2	1200
Weighted rating	1223.7	1210.9	1226.5	1200
Weighted performance	1209.6	1153.5	0	0
Floor	749.7	722.2	754.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	154.5	161.2	153.5	165.8
Highest rating	1249.7 2025-08-01	1222.2 2025-05-05	1303.6 2024-07-01	1200 2024-10-01
Highest raw rating	1249.7 2025-08-01	1222.2 2025-05-05	1254.2 2025-08-01	1200 2024-10-01
Highest weighted rating	1226.4 2024-10-01	1207.3 2025-08-01	1217.6 2024-10-01	1200 2024-10-01
Highest weighted performance	1249.7 2025-08-01	1200 2024-10-01	1303.6 2024-07-01	1200 2024-10-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1249.7	1219.7	1254.2	1200
Analysis
Rating	1249.7	1219.7	1254.2	1200
Raw rating	1249.7	1219.7	1254.2	1200
Weighted rating	1223.7	1210.9	1226.5
Weighted performance	1209.6	1153.5	0
K-factor	36	36	36	36
Floor	749.7	722.2	754.2	700
Max/Min rating change allowed	154.5	161.2	153.5	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	1249.7	1219.7	1254.2	1200
New weighted rating	1226.5	1211.9	1229.4	1200
New weighted performance	1202.1	1146.3	0	0
Temp new rating	1249.7	1219.7	1254.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1249.7	1219.7	1254.2	1200
New K-factor	36	36	36	36
New floor	749.7	722.2	754.2	700

Item	Main	Standard	Rapid
	0	0	0
	31	27	4
	4	0	4
	0	0	0
	0	0	0
	0	0	0
History	35	27	8

Games since
	Main 35	Standard 27		Rapid 8		Blitz 0
Gender	Male
Age group	U18
Region	Sarah Baartman (ESB)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	31	15	48.39	-13.7	1275.9	1262.2
Standard	27	12	44.44	-47.2	1277.6	1230.4
Rapid	4	3	75	212.5	1264.5	1477
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	35	17.5	50	0	1267.1	1267.1
Standard	27	12	44.44	-47.2	1277.6	1230.4
Rapid	8	5.5	68.75	159.4	1231.8	1391.2
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1249.7	1219.7	1254.2	1200
2025-09-30	1249.7	1219.7	1254.2	1200
2025-09-01	1249.7	1219.7	1254.2	1200
2025-08-01	1249.7	1219.7	1254.2	1200
2025-07-01	1221	1217.1	1217.6	1200
2025-06-01	1221	1217.1	1217.6	1200
2025-05-01	1226.4	1222.2	1217.6	1200
2025-04-01	1211.9	1205.8	1217.6	1200
2025-03-01	1223.8	1219.7	1217.6	1200
2025-02-01	1209.2	1200	1217.6	1200
2025-01-01	1209.2	1200	1217.6	1200
2024-12-01	1209.2	1200	1217.6	1200
2024-11-01	1209.2	1200	1217.6	1200
2024-10-01	1209.2	1200	1217.6	1200
2024-09-01	1209.2	1200	1217.6	1200
2024-08-01	1209.2	1200	1217.6	1200
2024-07-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	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	Eastern Cape Inter-Regional Individual Chess Championship 2025 (U18 Open)	2025-07-11	2025-07-12	Standard	Amathole (EAL)	6	6	2.5	Yes	Analysis
2	Port Alfred Chess Tournament 2025 (A)	2025-06-21	2025-06-21	Rapid	Sarah Baartman (ESB)	5	4	3	Yes	Analysis
3	SBDCA Closed 2025 (U18 Boys)	2025-05-10	2025-05-10	Standard	Sarah Baartman (ESB)	6	6	2	Yes	Analysis
4	SBDCU Trial 9 2025 (U18)	2025-04-26	2025-04-26	Standard	Sarah Baartman (ESB)	5	5	2.5	Yes	Analysis
5	SBDCU Trial 6 2025 (U18)	2025-03-15	2025-03-15	Standard	Sarah Baartman (ESB)	5	5	2	Yes	Analysis
6	SBDCU Trials 5 Makhanda Leg 2025 (U18)	2025-02-22	2025-02-22	Standard	Sarah Baartman (ESB)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Eastern Cape Inter-Regional Individual Chess Championship 2025 (U18 Open)	2025-07-11	2025-07-12	Standard	Amathole (EAL)	6	6	2.5	Yes	Analysis
2	Port Alfred Chess Tournament 2025 (A)	2025-06-21	2025-06-21	Rapid	Sarah Baartman (ESB)	5	4	3	Yes	Analysis
3	SBDCA Closed 2025 (U18 Boys)	2025-05-10	2025-05-10	Standard	Sarah Baartman (ESB)	6	6	2	Yes	Analysis
4	SBDCU Trial 9 2025 (U18)	2025-04-26	2025-04-26	Standard	Sarah Baartman (ESB)	5	5	2.5	Yes	Analysis
5	SBDCU Trial 6 2025 (U18)	2025-03-15	2025-03-15	Standard	Sarah Baartman (ESB)	5	5	2	Yes	Analysis
6	SBDCU Trials 5 Makhanda Leg 2025 (U18)	2025-02-22	2025-02-22	Standard	Sarah Baartman (ESB)	5	5	3	Yes	Analysis
7	Makhanda Schools Championship 2024 (A Boys)	2024-07-20	2024-07-20	Rapid	Sarah Baartman (ESB)	5	4	2.5	Yes	Analysis

#	Games	Start				End
1	3	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 3	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Mnombo, M (Magqogqo)				Opponent Manyika, C (Caleb)
2	3	Tournament SBDCU Trials 5 Makhanda Leg 2025				Tournament SBDCU Trial 6 2025
		date 2025-02-22	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Nteyi, A (Abenathi)				Opponent Timms, S (Seth)
3	3	Tournament Makhanda Schools Championship 2024				Tournament Makhanda Schools Championship 2024
		date 2024-07-20	rnd 3	type Rapid	result 1	date 2024-07-20	rnd 5	type Rapid	result 1
		Opponent Masimbonge, Y (Yamiso)				Opponent Ncalu, L (Lihlumile)

#	Games	Start				End
1	3	Tournament SBDCU Trials 5 Makhanda Leg 2025				Tournament SBDCU Trial 6 2025
		date 2025-02-22	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Nteyi, A (Abenathi)				Opponent Timms, S (Seth)
2	2	Tournament SBDCA Closed 2025				Tournament SBDCA Closed 2025
		date 2025-05-10	rnd 4	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 0.5
		Opponent Olivier, H (Handru)				Opponent Nteyi, A (Abenathi)
3	2	Tournament SBDCU Trial 9 2025				Tournament SBDCU Trial 9 2025
		date 2025-04-26	rnd 2	type Standard	result 1	date 2025-04-26	rnd 3	type Standard	result 1
		Opponent Nesi, L (Lutho)				Opponent Gosha, P (Patson)

#	Games	Start				End
1	3	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 3	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Mnombo, M (Magqogqo)				Opponent Manyika, C (Caleb)
2	3	Tournament Makhanda Schools Championship 2024				Tournament Makhanda Schools Championship 2024
		date 2024-07-20	rnd 3	type Rapid	result 1	date 2024-07-20	rnd 5	type Rapid	result 1
		Opponent Masimbonge, Y (Yamiso)				Opponent Ncalu, L (Lihlumile)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 3	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Mnombo, M (Magqogqo)				Opponent Manyika, C (Caleb)
2	3	Tournament SBDCU Trials 5 Makhanda Leg 2025				Tournament SBDCU Trial 6 2025
		date 2025-02-22	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Nteyi, A (Abenathi)				Opponent Timms, S (Seth)
3	2	Tournament SBDCU Trial 9 2025				Tournament SBDCU Trial 9 2025
		date 2025-04-26	rnd 2	type Standard	result 1	date 2025-04-26	rnd 3	type Standard	result 1
		Opponent Nesi, L (Lutho)				Opponent Gosha, P (Patson)

#	Games	Start				End
1	3	Tournament SBDCU Trials 5 Makhanda Leg 2025				Tournament SBDCU Trial 6 2025
		date 2025-02-22	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Nteyi, A (Abenathi)				Opponent Timms, S (Seth)
2	2	Tournament SBDCU Trial 9 2025				Tournament SBDCU Trial 9 2025
		date 2025-04-26	rnd 2	type Standard	result 1	date 2025-04-26	rnd 3	type Standard	result 1
		Opponent Nesi, L (Lutho)				Opponent Gosha, P (Patson)
3	2	Tournament SBDCU Trials 5 Makhanda Leg 2025				Tournament SBDCU Trials 5 Makhanda Leg 2025
		date 2025-02-22	rnd 2	type Standard	result 1	date 2025-02-22	rnd 3	type Standard	result 1
		Opponent Nesi, L (Lutho)				Opponent Timms, S (Seth)

#	Games	Start				End
1	3	Tournament Port Alfred Chess Tournament 2025				Tournament Port Alfred Chess Tournament 2025
		date 2025-06-21	rnd 3	type Rapid	result 1	date 2025-06-21	rnd 5	type Rapid	result 1
		Opponent Mnombo, M (Magqogqo)				Opponent Manyika, C (Caleb)
2	1	Tournament Makhanda Schools Championship 2024				Tournament Makhanda Schools Championship 2024
		date 2024-07-20	rnd 5	type Rapid	result 1	date 2024-07-20	rnd 5	type Rapid	result 1
		Opponent Ncalu, L (Lihlumile)				Opponent Ncalu, L (Lihlumile)
3	1	Tournament Makhanda Schools Championship 2024				Tournament Makhanda Schools Championship 2024
		date 2024-07-20	rnd 3	type Rapid	result 1	date 2024-07-20	rnd 3	type Rapid	result 1
		Opponent Masimbonge, Y (Yamiso)				Opponent Masimbonge, Y (Yamiso)

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	Nesi ,L (Lutho)	3	2.5	283.3	3	2.5	283.3	0	0	0	0	0	0
1	Nesi ,L (Lutho)	3	1197.6	1481	3	1197.2	1481	0	0	0	0	0	0
2	Nteyi ,A (Abenathi)	3	2.5	283.3	3	2.5	283.3	0	0	0	0	0	0
2	Nteyi ,A (Abenathi)	3	1204.6	1488	3	1205.1	1488	0	0	0	0	0	0
3	Timms ,S (Seth)	2	2	425	2	2	425	0	0	0	0	0	0
3	Timms ,S (Seth)	2	1199.3	1624.3	2	1199.2	1624.3	0	0	0	0	0	0
4	Vubela ,L (Luvano)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
4	Vubela ,L (Luvano)	2	1283.3	1070.8	2	1289.8	1070.8	0	0	0	0	0	0
5	Gosha ,P (Patson)	2	1	0	1	1	425	1	0	-425	0	0	0
5	Gosha ,P (Patson)	2	1207.2	1207.2	1	1222.1	1632.2	1	1154	782.2	0	0	0
6	Papu ,B (Bunakho)	2	0	-425	1	0	-425	1	0	-425	0	0	0
6	Papu ,B (Bunakho)	2	1439.8	1014.8	1	1377.7	1014.8	1	1305.8	1014.8	0	0	0
7	Masimbonge ,Y (Yamiso)	2	2	425	0	0	0	2	2	425	0	0	0
7	Masimbonge ,Y (Yamiso)	2	1194.6	1619.6	0	0	0	2	1190	1619.6	0	0	0
8	Magobiyane ,S (Sandile)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Magobiyane ,S (Sandile)	1	1499.4	1074.4	1	1481.4	1074.4	0	0	0	0	0	0
9	Rukwata ,C (Ciarah)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Rukwata ,C (Ciarah)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Powell ,D (Dominic)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Powell ,D (Dominic)	1	1625.6	1200.6	1	1609.5	1200.6	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

Grobbelaar, D (Devan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms