Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Graaff, J (Johane)

Chess SA id

2110105066

FIDE id

Date of birth

2011-01-01 (U16)

Gender

Female

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	1225.5	1176.7	1263.2	1200
Raw rating	1225.5	1176.7	1263.2	1200
Weighted rating	1214.2	1175.1	1245.7	1200
Weighted performance	1023.1	854.1	0	0
Floor	742.4	733.7	763.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	159.9	171.4	151.5	165.8
Highest rating	1242.4 2024-04-01	1233.7 2024-04-01	1263.2 2025-03-01	1200 2018-10-01
Highest raw rating	1242.4 2024-04-01	1233.7 2024-04-01	1263.2 2025-03-01	1200 2024-03-01
Highest weighted rating	1242.4 2022-08-01	1233.7 2022-08-01	1237.4 2025-08-01	1200 2018-10-01
Highest weighted performance	1200 2019-12-01	1200 2019-12-01	1200 2019-12-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1225.5	1176.7	1263.2	1200
Analysis
Rating	1225.5	1176.7	1263.2	1200
Raw rating	1225.5	1176.7	1263.2	1200
Weighted rating	1214.2	1175.1	1245.7
Weighted performance	1023.1	854.1	0
K-factor	36	36	36	36
Floor	742.4	733.7	763.2	700
Max/Min rating change allowed	159.9	171.4	151.5	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	1225.5	1176.7	1263.2	1200
New weighted rating	1215.5	1175	1248.1	1200
New weighted performance	1015.9	847.4	0	0
Temp new rating	1225.5	1176.7	1263.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1225.5	1176.7	1263.2	1200
New K-factor	36	36	36	36
New floor	742.4	733.7	763.2	700

Item	Main	Standard	Rapid
	0	0	0
	6	0	6
	16	11	5
	5	5	0
	15	15	0
	0	0	0
History	42	31	11

Games since
	Main 22	Standard 11		Rapid 11		Blitz 0
Gender	Female
Age group	U16
Region	Overberg (WOS)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-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	1238.7	1380.4
Standard	0	0	0	0	0	0
Rapid	6	4	66.67	141.7	1238.7	1380.4
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	42	21.5	51.19	10.1	1222.9	1233
Standard	31	14.5	46.77	-27.4	1228.2	1200.8
Rapid	11	7	63.64	115.9	1208	1323.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1225.5	1176.7	1263.2	1200
2025-09-30	1225.5	1176.7	1263.2	1200
2025-09-01	1225.5	1176.7	1263.2	1200
2025-08-01	1225.5	1176.7	1263.2	1200
2025-07-01	1225.5	1176.7	1263.2	1200
2025-06-01	1225.5	1176.7	1263.2	1200
2025-05-01	1225.5	1176.7	1263.2	1200
2025-04-01	1225.5	1176.7	1263.2	1200
2025-03-01	1225.5	1176.7	1263.2	1200
2025-02-01	1197.4	1176.1	1220.5	1200
2025-01-01	1191.3	1162.8	1220.5	1200
2024-12-01	1191.3	1162.8	1220.5	1200
2024-11-01	1191.3	1162.8	1220.5	1200
2024-10-01	1191.3	1162.8	1220.5	1200
2024-09-01	1191.3	1162.8	1220.5	1200
2024-08-01	1191.3	1162.8	1220.5	1200
2024-07-01	1191.3	1162.8	1220.5	1200
2024-09-01	1191.3	1162.8	1220.5	1200
2024-05-01	1242.4	1233.7	1220.5	1200
2024-04-01	1242.4	1233.7	1220.5	1200
2024-03-01	1202.7	1183.7	1220.5	1200
2024-02-01	1193.8	1183.7	1200	1200
2024-01-01	1193.8	1183.7	1200	1200
2023-12-01	1193.8	1183.7	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	Overberg Schools - HS Trials 2025 (U15 Girls)	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 (U15 Girls)	2025-02-22	2025-02-22	Rapid	Overberg (WOS)	6	6	4	Yes	Analysis
2	Western Cape PS Individuals Championship 2024 (U13 Girls)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	1	Yes	Analysis
3	Overberg Schools - PS Closed 2024 (U13 Girls)	2024-03-16	2024-03-16	Standard	Overberg (WOS)	5	5	4	Yes	Analysis
4	Overberg Swellendam Primary Schools Zone Trails Region 2 2024 (U13)	2024-02-10	2024-02-10	Rapid	Overberg (WOS)	5	5	3	Yes	Analysis
5	Strategema 2023 (U11+U13)	2023-05-13	2023-05-13	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
6	Ekurhuleni-North Schools Teams 2022 (U13 Girls)	2022-08-20	2022-08-20	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
7	Ekurhuleni-North Schools Finals Indiv 2022 (U11 Girls)	2022-05-13	2022-05-13	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	Ekurhuleni Trials 1 2022 (U12)	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 Womens Day Tournament (Female)	2018-08-09	2018-08-09	Rapid	Ekurhuleni (GE)	7	0	0	No	Analysis

#	Games	Start				End
1	4	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Maskell, T (Tao)				Opponent Swart, T (Tayla)
2	2	Tournament Overberg Schools - HS Trials 2025				Tournament Overberg Schools - HS Trials 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-02-22	rnd 4	type Rapid	result 1
		Opponent Mazala, A (Asakhe)				Opponent Swarts, D (Denicka)
3	2	Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024				Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024
		date 2024-02-10	rnd 1	type Rapid	result 1	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Witbooi, C (Carla)				Opponent Boes, D (Daylan)

#	Games	Start				End
1	4	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Maskell, T (Tao)				Opponent Swart, T (Tayla)
2	2	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Ekurhuleni-North Schools Teams 2022
		date 2022-08-20	rnd 3	type Standard	result 1	date 2022-08-20	rnd 4	type Standard	result 1
		Opponent Manashe, A (Ayande)				Opponent Ledwaba, Z (Zandile)
3	2	Tournament Ekurhuleni-North Schools Finals Indiv 2022				Tournament Ekurhuleni-North Schools Finals Indiv 2022
		date 2022-05-13	rnd 4	type Standard	result 1	date 2022-05-13	rnd 5	type Standard	result 1
		Opponent Mbangula, K (Kay-Lee Yondela)				Opponent Potgieter, K (Kiara)

#	Games	Start				End
1	2	Tournament Overberg Schools - HS Trials 2025				Tournament Overberg Schools - HS Trials 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-02-22	rnd 4	type Rapid	result 1
		Opponent Mazala, A (Asakhe)				Opponent Swarts, D (Denicka)
2	2	Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024				Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024
		date 2024-02-10	rnd 1	type Rapid	result 1	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Witbooi, C (Carla)				Opponent Boes, D (Daylan)
3	1	Tournament Overberg Schools - HS Trials 2025				Tournament Overberg Schools - HS Trials 2025
		date 2025-02-22	rnd 6	type Rapid	result 1	date 2025-02-22	rnd 6	type Rapid	result 1
		Opponent Nel, A (Anika)				Opponent Nel, A (Anika)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Maskell, T (Tao)				Opponent Swart, T (Tayla)
2	2	Tournament Overberg Schools - HS Trials 2025				Tournament Overberg Schools - HS Trials 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-02-22	rnd 4	type Rapid	result 1
		Opponent Mazala, A (Asakhe)				Opponent Swarts, D (Denicka)
3	2	Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024				Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024
		date 2024-02-10	rnd 1	type Rapid	result 1	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Witbooi, C (Carla)				Opponent Boes, D (Daylan)

#	Games	Start				End
1	4	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Maskell, T (Tao)				Opponent Swart, T (Tayla)
2	2	Tournament Ekurhuleni-North Schools Teams 2022				Tournament Ekurhuleni-North Schools Teams 2022
		date 2022-08-20	rnd 3	type Standard	result 1	date 2022-08-20	rnd 4	type Standard	result 1
		Opponent Manashe, A (Ayande)				Opponent Ledwaba, Z (Zandile)
3	2	Tournament Ekurhuleni-North Schools Finals Indiv 2022				Tournament Ekurhuleni-North Schools Finals Indiv 2022
		date 2022-05-13	rnd 4	type Standard	result 1	date 2022-05-13	rnd 5	type Standard	result 1
		Opponent Mbangula, K (Kay-Lee Yondela)				Opponent Potgieter, K (Kiara)

#	Games	Start				End
1	2	Tournament Overberg Schools - HS Trials 2025				Tournament Overberg Schools - HS Trials 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-02-22	rnd 4	type Rapid	result 1
		Opponent Mazala, A (Asakhe)				Opponent Swarts, D (Denicka)
2	2	Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024				Tournament Overberg Swellendam Primary Schools Zone Trails Region 2 2024
		date 2024-02-10	rnd 1	type Rapid	result 1	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Witbooi, C (Carla)				Opponent Boes, D (Daylan)
3	1	Tournament Overberg Schools - HS Trials 2025				Tournament Overberg Schools - HS Trials 2025
		date 2025-02-22	rnd 6	type Rapid	result 1	date 2025-02-22	rnd 6	type Rapid	result 1
		Opponent Nel, A (Anika)				Opponent Nel, A (Anika)

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	Balelo ,Z (Zimkhita)	2	2	425	1	1	425	1	1	425	0	0	0
1	Balelo ,Z (Zimkhita)	2	1100.1	1525.1	1	1083.6	1525.1	1	1196.8	1525.1	0	0	0
2	Swart ,T (Tayla)	1	1	425	1	1	425	0	0	0	0	0	0
2	Swart ,T (Tayla)	1	1127.3	1552.3	1	1098.8	1552.3	0	0	0	0	0	0
3	Ledwaba ,Z (Zandile)	1	1	425	1	1	425	0	0	0	0	0	0
3	Ledwaba ,Z (Zandile)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Hendricks ,T (Tamia)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Hendricks ,T (Tamia)	1	1213	788	1	1200	788	0	0	0	0	0	0
5	Peters ,C (Chantel)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Peters ,C (Chantel)	1	1307.5	882.5	1	1221.4	882.5	0	0	0	0	0	0
6	Hingorani ,R (Ridhima)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Hingorani ,R (Ridhima)	1	1379.8	954.8	1	1332.4	954.8	0	0	0	0	0	0
7	Potgieter ,T (Tristan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
7	Potgieter ,T (Tristan)	1	1123.3	1123.3	1	1106.8	1123.3	0	0	0	0	0	0
8	Coetzee ,C (Carli)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Coetzee ,C (Carli)	1	1181.3	756.3	1	1178.4	756.3	0	0	0	0	0	0
9	Botha ,CA (Cathri Amari)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Botha ,CA (Cathri Amari)	1	1388.2	963.2	1	1374	963.2	0	0	0	0	0	0
10	Scheepers ,G (Gabriel)	1	1	425	1	1	425	0	0	0	0	0	0
10	Scheepers ,G (Gabriel)	1	1200	1625	1	1200	1625	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, J (Johane)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms