Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Graaff, R (Ruben)

Chess SA id

1090101502

FIDE id

Date of birth

2009-10-02 (U18)

Gender

Male

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-02-22

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1294	1202.2	1310.8	1219.4
Raw rating	1294	1202.2	1310.8	1219.4
Weighted rating	1269.1	1202.2	1276	1216.5
Weighted performance	1143.6	731.8	0	0
Floor	794	788.7	810.8	719.4
K-factor	36	36	36	36
Min/Max rating change allowed	145	165.3	141.6	161.3
Highest rating	1472.7 2018-08-01	1475.1 2018-08-01	1313.7 2024-11-01	1298.2 2024-07-01
Highest raw rating	1294 2025-03-01	1288.7 2020-01-01	1310.8 2025-03-01	1219.4 2024-08-01
Highest weighted rating	1294 2021-05-01	1288.7 2021-05-01	1265 2025-08-01	1215.1 2025-08-01
Highest weighted performance	1472.7 2018-08-01	1475.1 2018-08-01	1313.7 2024-11-01	1298.2 2024-07-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1294	1202.2	1310.8	1219.4
Analysis
Rating	1294	1202.2	1310.8	1219.4
Raw rating	1294	1202.2	1310.8	1219.4
Weighted rating	1269.1	1202.2	1276
Weighted performance	1143.6	731.8	0
K-factor	36	36	36	36
Floor	794	788.7	810.8	719.4
Max/Min rating change allowed	145	165.3	141.6	161.3
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	1294	1202.2	1310.8	1219.4
New weighted rating	1272.5	1202.2	1280.9	1217.1
New weighted performance	1143.2	731.4	0	0
Temp new rating	1294	1202.2	1310.8	1219.4
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1294	1202.2	1310.8	1219.4
New K-factor	36	36	36	36
New floor	794	788.7	810.8	719.4

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	6	0	6	0
	11	0	6	5
	10	5	5	0
	15	15	0	0
	4	4	0	0
History	56	34	17	5

Games since
	Main 17	Standard 0		Rapid 12		Blitz 5
Gender	Male
Age group	U18
Region	Overberg (WOS)
Province	Western Cape (WC)
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	6	4	66.67	141.7	1295.4	1437.1
Standard	0	0	0	0	0	0
Rapid	6	4	66.67	141.7	1295.4	1437.1
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	56	33.5	59.82	83.5	1210.7	1294.2
Standard	34	18.5	54.41	37.5	1184.7	1222.2
Rapid	17	12	70.59	175	1255.4	1430.4
Blitz	5	3	60	85	1235.2	1320.2

Date	Main	Standard	Rapid	Blitz
2025-09-30	1294	1202.2	1310.8	1219.4
2025-09-01	1294	1202.2	1310.8	1219.4
2025-08-01	1294	1202.2	1310.8	1219.4
2025-07-01	1294	1202.2	1310.8	1219.4
2025-06-01	1294	1202.2	1310.8	1219.4
2025-05-01	1294	1202.2	1310.8	1219.4
2025-04-01	1294	1202.2	1310.8	1219.4
2025-03-01	1294	1202.2	1310.8	1219.4
2025-02-01	1268.1	1202.2	1285.2	1219.4
2025-01-01	1268.1	1202.2	1285.2	1219.4
2024-12-01	1268.1	1202.2	1285.2	1219.4
2024-11-01	1268.1	1202.2	1285.2	1219.4
2024-10-01	1219.9	1202.2	1196	1219.4
2024-09-01	1219.9	1202.2	1196	1219.4
2024-08-01	1219.9	1202.2	1196	1219.4
2024-07-01	1215.7	1202.2	1196	1200
2024-06-01	1215.7	1202.2	1196	1200
2024-08-01	1215.7	1202.2	1196	1200
2024-04-01	1215.7	1202.2	1196	1200
2024-03-01	1215.7	1202.2	1196	1200
2024-02-01	1215.7	1202.2	1196	1200
2024-01-01	1215.7	1202.2	1196	1200
2023-12-01	1215.7	1202.2	1196	1200
2023-11-01	1215.7	1202.2	1196	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	Overberg Schools - HS Trials 2025 (U17 Boys)	2025-02-22	2025-02-22	Rapid	Overberg (WOS)	6	6	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Overberg Schools - HS Trials 2025 (U17 Boys)	2025-02-22	2025-02-22	Rapid	Overberg (WOS)	6	6	4	Yes	Analysis
2	Worcester Knock-Out 2024 (U15 Boys)	2024-10-19	2024-10-19	Rapid	Cape Winelands (WCW)	6	6	5	Yes	Analysis
3	HS Swellendam July Tournament 2024	2024-07-31	2024-07-31	Blitz	Overberg (WOS)	5	5	3	Yes	Analysis
4	Strategema 2023 (U15-U19)	2023-05-13	2023-05-13	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
5	Overberg High Schools Trails 2023 (U15)	2023-02-24	2023-02-24	Rapid	Overberg (WOS)	5	5	3	Yes	Analysis
6	Ekurhuleni-North Schools Teams 2022 (U13)	2022-08-06	2022-08-06	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
7	Ekurhuleni-North Schools Finals Indiv 2022 (U13 Boys)	2022-05-13	2022-05-13	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
8	Ekurhuleni Trials 1 2022 (U14)	2022-04-23	2022-04-23	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
9	Ekurhuleni Trials (3)	2021-11-06	2021-11-06	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
10	Ekurhuleni North Schools District Finals 2021 (U13 Boys)	2021-09-11	2021-09-11	Standard	Ekurhuleni (GE)	5	4	1	Yes	Analysis
11	2019 Alekhine Open (C)	2019-08-09	2019-08-10	Standard	Tshwane (GTP)	5	0	0	No	Analysis
12	Ekurhuleni North School District Finals 2019 (U11 Boys)	2019-05-11	2019-05-11	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
13	Ekurhuleni North District Schools Final 2018 (U9)	2018-08-04	2018-08-04	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis

#	Games	Start				End
1	5	Tournament Worcester Knock-Out 2024				Tournament Overberg Schools - HS Trials 2025
		date 2024-10-19	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 3	type Rapid	result 1
		Opponent Blaauws, I (Ilano)				Opponent Du Plessis, MA (Matthys Armand)
2	5	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North School District Finals 2019
		date 2018-08-04	rnd 2	type Standard	result 1	date 2019-05-11	rnd 1	type Standard	result 1
		Opponent Botha, T (Trevor Justus)				Opponent Du Plessis, WJH (Willem Jacobus Hendrik)
3	4	Tournament HS Swellendam July Tournament 2024				Tournament Worcester Knock-Out 2024
		date 2024-07-31	rnd 5	type Blitz	result 1	date 2024-10-19	rnd 3	type Rapid	result 1
		Opponent Damons, K (Keagon)				Opponent Hugo, E (Emil)

#	Games	Start				End
1	5	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North School District Finals 2019
		date 2018-08-04	rnd 2	type Standard	result 1	date 2019-05-11	rnd 1	type Standard	result 1
		Opponent Botha, T (Trevor Justus)				Opponent Du Plessis, WJH (Willem Jacobus Hendrik)
2	3	Tournament Ekurhuleni North School District Finals 2019				Tournament Ekurhuleni North School District Finals 2019
		date 2019-05-11	rnd 3	type Standard	result 1	date 2019-05-11	rnd 5	type Standard	result 1
		Opponent Hewu, S (Sange)				Opponent Pillman, AH (Arthur Hanre)
3	2	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Strategema 2023
		date 2022-08-06	rnd 5	type Standard	result 1	date 2023-05-13	rnd 1	type Standard	result 1
		Opponent Lubbe, J (Juan)				Opponent Windvogel, J (Jo-Wano)

#	Games	Start				End
1	5	Tournament Worcester Knock-Out 2024				Tournament Overberg Schools - HS Trials 2025
		date 2024-10-19	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 3	type Rapid	result 1
		Opponent Blaauws, I (Ilano)				Opponent Du Plessis, MA (Matthys Armand)
2	3	Tournament Worcester Knock-Out 2024				Tournament Worcester Knock-Out 2024
		date 2024-10-19	rnd 1	type Rapid	result 1	date 2024-10-19	rnd 3	type Rapid	result 1
		Opponent Gray, Z (Zhakier)				Opponent Hugo, E (Emil)
3	2	Tournament Overberg High Schools Trails 2023				Tournament Overberg High Schools Trails 2023
		date 2023-02-24	rnd 1	type Rapid	result 1	date 2023-02-24	rnd 2	type Rapid	result 1
		Opponent Jack, C (Chivano)				Opponent Mackenzie, E (Erin-Lee)

#	Games	Start				End
1	1	Tournament HS Swellendam July Tournament 2024				Tournament HS Swellendam July Tournament 2024
		date 2024-07-31	rnd 5	type Blitz	result 1	date 2024-07-31	rnd 5	type Blitz	result 1
		Opponent Damons, K (Keagon)				Opponent Damons, K (Keagon)
2	1	Tournament HS Swellendam July Tournament 2024				Tournament HS Swellendam July Tournament 2024
		date 2024-07-31	rnd 3	type Blitz	result 1	date 2024-07-31	rnd 3	type Blitz	result 1
		Opponent Flores, S (Sarah)				Opponent Flores, S (Sarah)
3	1	Tournament HS Swellendam July Tournament 2024				Tournament HS Swellendam July Tournament 2024
		date 2024-07-31	rnd 1	type Blitz	result 1	date 2024-07-31	rnd 1	type Blitz	result 1
		Opponent September, R (Ryan)				Opponent September, R (Ryan)

#	Games	Start				End
1	5	Tournament Worcester Knock-Out 2024				Tournament Overberg Schools - HS Trials 2025
		date 2024-10-19	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 3	type Rapid	result 1
		Opponent Blaauws, I (Ilano)				Opponent Du Plessis, MA (Matthys Armand)
2	5	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North School District Finals 2019
		date 2018-08-04	rnd 2	type Standard	result 1	date 2019-05-11	rnd 1	type Standard	result 1
		Opponent Botha, T (Trevor Justus)				Opponent Du Plessis, WJH (Willem Jacobus Hendrik)
3	4	Tournament HS Swellendam July Tournament 2024				Tournament Worcester Knock-Out 2024
		date 2024-07-31	rnd 5	type Blitz	result 1	date 2024-10-19	rnd 3	type Rapid	result 1
		Opponent Damons, K (Keagon)				Opponent Hugo, E (Emil)

#	Games	Start				End
1	5	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North School District Finals 2019
		date 2018-08-04	rnd 2	type Standard	result 1	date 2019-05-11	rnd 1	type Standard	result 1
		Opponent Botha, T (Trevor Justus)				Opponent Du Plessis, WJH (Willem Jacobus Hendrik)
2	3	Tournament Ekurhuleni North School District Finals 2019				Tournament Ekurhuleni North School District Finals 2019
		date 2019-05-11	rnd 3	type Standard	result 1	date 2019-05-11	rnd 5	type Standard	result 1
		Opponent Hewu, S (Sange)				Opponent Pillman, AH (Arthur Hanre)
3	2	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Strategema 2023
		date 2022-08-06	rnd 5	type Standard	result 1	date 2023-05-13	rnd 1	type Standard	result 1
		Opponent Lubbe, J (Juan)				Opponent Windvogel, J (Jo-Wano)

#	Games	Start				End
1	5	Tournament Worcester Knock-Out 2024				Tournament Overberg Schools - HS Trials 2025
		date 2024-10-19	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 3	type Rapid	result 1
		Opponent Blaauws, I (Ilano)				Opponent Du Plessis, MA (Matthys Armand)
2	3	Tournament Worcester Knock-Out 2024				Tournament Worcester Knock-Out 2024
		date 2024-10-19	rnd 1	type Rapid	result 1	date 2024-10-19	rnd 3	type Rapid	result 1
		Opponent Gray, Z (Zhakier)				Opponent Hugo, E (Emil)
3	2	Tournament Overberg High Schools Trails 2023				Tournament Overberg High Schools Trails 2023
		date 2023-02-24	rnd 1	type Rapid	result 1	date 2023-02-24	rnd 2	type Rapid	result 1
		Opponent Jack, C (Chivano)				Opponent Mackenzie, E (Erin-Lee)

#	Games	Start				End
1	1	Tournament HS Swellendam July Tournament 2024				Tournament HS Swellendam July Tournament 2024
		date 2024-07-31	rnd 5	type Blitz	result 1	date 2024-07-31	rnd 5	type Blitz	result 1
		Opponent Damons, K (Keagon)				Opponent Damons, K (Keagon)
2	1	Tournament HS Swellendam July Tournament 2024				Tournament HS Swellendam July Tournament 2024
		date 2024-07-31	rnd 3	type Blitz	result 1	date 2024-07-31	rnd 3	type Blitz	result 1
		Opponent Flores, S (Sarah)				Opponent Flores, S (Sarah)
3	1	Tournament HS Swellendam July Tournament 2024				Tournament HS Swellendam July Tournament 2024
		date 2024-07-31	rnd 1	type Blitz	result 1	date 2024-07-31	rnd 1	type Blitz	result 1
		Opponent September, R (Ryan)				Opponent September, R (Ryan)

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	Ramohlohla ,L (Lerato Motaso)	2	1	0	2	1	0	0	0	0	0	0	0
1	Ramohlohla ,L (Lerato Motaso)	2	1301.1	1301.1	2	1301.5	1301.1	0	0	0	0	0	0
2	Jordaan ,M (Mine)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
2	Jordaan ,M (Mine)	2	1241.1	1028.6	2	1242.5	1028.6	0	0	0	0	0	0
3	Fivaz ,G (George Michael)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Fivaz ,G (George Michael)	1	1152.3	727.3	1	1151.2	727.3	0	0	0	0	0	0
4	Janse Van Vuuren ,A (Alexander)	1	1	425	1	1	425	0	0	0	0	0	0
4	Janse Van Vuuren ,A (Alexander)	1	1119.8	1544.8	1	1101.2	1544.8	0	0	0	0	0	0
5	Solani ,L (Lwandisa)	1	1	425	1	1	425	0	0	0	0	0	0
5	Solani ,L (Lwandisa)	1	1149.9	1574.9	1	1139.2	1574.9	0	0	0	0	0	0
6	Smith ,O (Oswill)	1	1	425	1	1	425	0	0	0	0	0	0
6	Smith ,O (Oswill)	1	1116.4	1541.4	1	1114	1541.4	0	0	0	0	0	0
7	Viljoen ,M (Megan)	1	1	425	1	1	425	0	0	0	0	0	0
7	Viljoen ,M (Megan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Mafunga ,Z (Zakhele)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Mafunga ,Z (Zakhele)	1	1044.9	619.9	1	1020	619.9	0	0	0	0	0	0
9	Lenkili ,K (Keakantse)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Lenkili ,K (Keakantse)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Scheepers ,D (Durran)	1	1	425	1	1	425	0	0	0	0	0	0
10	Scheepers ,D (Durran)	1	1140	1565	1	1165.6	1565	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

De Graaff, R (Ruben)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms