Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grobbelaar, R (Ruan)

Chess SA id

1110150423

FIDE id

Date of birth

2011-12-06 (U16)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-05-11

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1220.6	1205	1209.1	1200
Raw rating	1220.6	1205	1209.1	1200
Weighted rating	1219.2	1204.9	1206.5	1200
Weighted performance	932.6	0	924.9	0
Floor	731.1	705	748.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	161	164.6	163.7	165.8
Highest rating	1286.4 2023-03-01	1230.6 2024-02-01	1330.4 2023-03-01	1200 2018-10-01
Highest raw rating	1231.1 2023-04-01	1205 2024-03-01	1248.7 2023-04-01	1200 2024-03-01
Highest weighted rating	1216.5 2025-08-01	1204.7 2025-08-01	1248.7 2023-06-01	1200 2018-10-01
Highest weighted performance	1286.4 2023-03-01	1230.6 2024-02-01	1330.4 2023-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1220.6	1205	1209.1	1200
Analysis
Rating	1220.6	1205	1209.1	1200
Raw rating	1220.6	1205	1209.1	1200
Weighted rating	1219.2	1204.9	1206.5
Weighted performance	932.6	0	924.9
K-factor	36	36	36	36
Floor	731.1	705	748.7	700
Max/Min rating change allowed	161	164.6	163.7	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	1220.6	1205	1209.1	1200
New weighted rating	1219.8	1204.9	1207.5	1200
New weighted performance	925.7	0	917.9	0
Temp new rating	1220.6	1205	1209.1	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1220.6	1205	1209.1	1200
New K-factor	36	36	36	36
New floor	731.1	705	748.7	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	15	5	10
	23	0	23
	0	0	0
	0	0	0
History	38	5	33

Games since
	Main 15	Standard 5		Rapid 10		Blitz 0
Gender	Male
Age group	U16
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	38	17	44.74	-44.7	1269.9	1225.1
Standard	5	2.5	50	0	1229.4	1229.4
Rapid	33	14.5	43.94	-51.5	1276	1224.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1220.6	1205	1209.1	1200
2025-09-30	1220.6	1205	1209.1	1200
2025-09-01	1220.6	1205	1209.1	1200
2025-08-01	1220.6	1205	1209.1	1200
2025-07-01	1220.6	1205	1209.1	1200
2025-06-01	1220.6	1205	1209.1	1200
2025-05-01	1220.6	1205	1209.1	1200
2025-04-01	1220.6	1205	1209.1	1200
2025-03-01	1220.6	1205	1209.1	1200
2025-02-01	1220.6	1205	1209.1	1200
2025-01-01	1220.6	1205	1209.1	1200
2024-12-01	1220.6	1205	1209.1	1200
2024-11-01	1220.6	1205	1209.1	1200
2024-10-01	1220.6	1205	1209.1	1200
2024-09-01	1220.6	1205	1209.1	1200
2024-08-01	1220.6	1205	1209.1	1200
2024-07-01	1220.6	1205	1209.1	1200
2024-09-01	1220.6	1205	1209.1	1200
2024-05-01	1222.1	1205	1209.8	1200
2024-04-01	1222.1	1205	1209.8	1200
2024-03-01	1181.9	1205	1129.9	1200
2024-02-01	1173.5	1200	1129.9	1200
2024-01-01	1173.5	1200	1129.9	1200
2023-12-01	1173.5	1200	1129.9	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	Steinitz Chess Festival 2024 (U14)	2024-05-11	2024-05-11	Rapid	Cape Town (WCT)	5	4	1.5	Yes	Analysis
2	Cape Town Open Rapid Chess Championship 2024 (U14)	2024-03-16	2024-03-16	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
3	North District School Trials 2024 (U13 Boys)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	5	2.5	Yes	Analysis
4	GPCA Rapid 2023 (U14)	2023-06-24	2023-06-24	Rapid	Cape Town (WCT)	7	7	1	Yes	Analysis
5	Steinitz Open 2023 (U14)	2023-05-27	2023-05-27	Rapid	Cape Town (WCT)	5	4	1	Yes	Analysis
6	Cape Town Open 2023 (U14)	2023-03-25	2023-03-25	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
7	Laerskool Welgemoed Rapid 2023 (U14)	2023-02-11	2023-02-11	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis

#	Games	Start				End
1	3	Tournament North District School Trials 2024				Tournament North District School Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 3	type Standard	result 0.5
		Opponent Friedrich, M (Max)				Opponent Slabbert, J (James)
2	3	Tournament Cape Town Open 2023				Tournament Cape Town Open 2023
		date 2023-03-25	rnd 3	type Rapid	result 1	date 2023-03-25	rnd 5	type Rapid	result 1
		Opponent Adams, S (Sofia)				Opponent Mayekiso, A (Amila)
3	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Steinitz Chess Festival 2024
		date 2024-03-16	rnd 6	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Faure, D (Douglas)				Opponent Stevens, DA (Danielle-Ann)

#	Games	Start				End
1	3	Tournament North District School Trials 2024				Tournament North District School Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 3	type Standard	result 0.5
		Opponent Friedrich, M (Max)				Opponent Slabbert, J (James)

#	Games	Start				End
1	3	Tournament Cape Town Open 2023				Tournament Cape Town Open 2023
		date 2023-03-25	rnd 3	type Rapid	result 1	date 2023-03-25	rnd 5	type Rapid	result 1
		Opponent Adams, S (Sofia)				Opponent Mayekiso, A (Amila)
2	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Steinitz Chess Festival 2024
		date 2024-03-16	rnd 6	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Faure, D (Douglas)				Opponent Stevens, DA (Danielle-Ann)
3	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Cape Town Open Rapid Chess Championship 2024
		date 2024-03-16	rnd 3	type Rapid	result 1	date 2024-03-16	rnd 4	type Rapid	result 1
		Opponent Marais, E (Enzo)				Opponent Nyandebvu, M (Mannasseh)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Cape Town Open 2023				Tournament Cape Town Open 2023
		date 2023-03-25	rnd 3	type Rapid	result 1	date 2023-03-25	rnd 5	type Rapid	result 1
		Opponent Adams, S (Sofia)				Opponent Mayekiso, A (Amila)
2	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Steinitz Chess Festival 2024
		date 2024-03-16	rnd 6	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Faure, D (Douglas)				Opponent Stevens, DA (Danielle-Ann)
3	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Cape Town Open Rapid Chess Championship 2024
		date 2024-03-16	rnd 3	type Rapid	result 1	date 2024-03-16	rnd 4	type Rapid	result 1
		Opponent Marais, E (Enzo)				Opponent Nyandebvu, M (Mannasseh)

#	Games	Start				End
1	2	Tournament North District School Trials 2024				Tournament North District School Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 2	type Standard	result 1
		Opponent Friedrich, M (Max)				Opponent Mashuro, D (Devine)

#	Games	Start				End
1	3	Tournament Cape Town Open 2023				Tournament Cape Town Open 2023
		date 2023-03-25	rnd 3	type Rapid	result 1	date 2023-03-25	rnd 5	type Rapid	result 1
		Opponent Adams, S (Sofia)				Opponent Mayekiso, A (Amila)
2	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Steinitz Chess Festival 2024
		date 2024-03-16	rnd 6	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Faure, D (Douglas)				Opponent Stevens, DA (Danielle-Ann)
3	2	Tournament Cape Town Open Rapid Chess Championship 2024				Tournament Cape Town Open Rapid Chess Championship 2024
		date 2024-03-16	rnd 3	type Rapid	result 1	date 2024-03-16	rnd 4	type Rapid	result 1
		Opponent Marais, E (Enzo)				Opponent Nyandebvu, M (Mannasseh)

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	Haman ,R (Rico)	2	0.5	-212.5	0	0	0	2	0.5	-212.5	0	0	0
1	Haman ,R (Rico)	2	1307.9	1095.4	0	0	0	2	1289.4	1095.4	0	0	0
2	Musakwa ,C (Carlton)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Musakwa ,C (Carlton)	1	1359.9	934.9	1	1349	934.9	0	0	0	0	0	0
3	Mashuro ,D (Devine)	1	1	425	1	1	425	0	0	0	0	0	0
3	Mashuro ,D (Devine)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Tyakane ,A (Amila)	1	1	425	0	0	0	1	1	425	0	0	0
4	Tyakane ,A (Amila)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
5	De Villiers ,L (Landon Cole)	1	0	-425	0	0	0	1	0	-425	0	0	0
5	De Villiers ,L (Landon Cole)	1	1200	775	0	0	0	1	1200	775	0	0	0
6	Stevens ,DA (Danielle-Ann)	1	1	425	0	0	0	1	1	425	0	0	0
6	Stevens ,DA (Danielle-Ann)	1	1299.9	1724.9	0	0	0	1	1303.8	1724.9	0	0	0
7	Tsabola ,B (Bright)	1	0	-425	0	0	0	1	0	-425	0	0	0
7	Tsabola ,B (Bright)	1	1362.4	937.4	0	0	0	1	1277.7	937.4	0	0	0
8	Conradie ,M (Michael)	1	0	-425	0	0	0	1	0	-425	0	0	0
8	Conradie ,M (Michael)	1	1200	775	0	0	0	1	1200	775	0	0	0
9	Marais ,E (Enzo)	1	1	425	0	0	0	1	1	425	0	0	0
9	Marais ,E (Enzo)	1	1285.8	1710.8	0	0	0	1	1218.8	1710.8	0	0	0
10	Van Der Spuy ,A (Albert)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Van Der Spuy ,A (Albert)	1	1331	906	0	0	0	1	1307.4	906	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Grobbelaar, R (Ruan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms