Chess South Africa Ratings Database

PLAYER PAGE

Personal

Groenewald, K (Katya)

Chess SA id

2170318810

FIDE id

Date of birth

2017-09-29 (U10)

Gender

Female

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-07-26

Personal details last changed

1900-01-01

Junior GPX Games

10.5

Junior GPX Points

953.7

Item	Main	Standard	Rapid	Blitz
Rating	1198.5	1199	1199	1200
Raw rating	1194.4	1196.8	1195.6	1200
Weighted rating	1198.5	1199	1199	1200
Weighted performance	0	0	0	0
Floor	699.9	699.9	700	700
K-factor	40	40	36	36
Min/Max rating change allowed	167.1	166.6	166.9	165.8
Highest rating	1199.9 2025-03-25	1199.9 2025-03-25	1200 2025-04-01	1200 2025-04-01
Highest raw rating	1199.9 2025-03-25	1199.9 2025-03-25	1200 2025-04-01	1200 2025-04-01
Highest weighted rating	1199.9 2025-03-25	1199.9 2025-03-25	1200 2025-04-01	1200 2025-04-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.4	-0.2	-0.3	0
New rating	1198.1	1198.8	1198.7	1200
Analysis
Rating	1198.5	1199	1199	1200
Raw rating	1194.4	1196.8	1195.6	1200
Weighted rating	1198.5	1199	1199
Weighted performance	0	0	0
K-factor	40	40	36	36
Floor	699.9	699.9	700	700
Max/Min rating change allowed	167.1	166.6	166.9	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	1194.4	1196.8	1195.6	1200
New weighted rating	1198.1	1198.8	1198.7	1200
New weighted performance	0	0	0	0
Temp new rating	1198.1	1198.8	1198.7	1200
Temp new rating +/-	-0.4	-0.2	-0.3	0
Final new rating +/-	-0.4	-0.2	-0.3	0
New rating	1198.1	1198.8	1198.7	1200
New K-factor	40	40	36	36
New floor	699.9	699.9	700	700

Item	Main	Standard	Rapid
	0	0	0
	12	9	3
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	12	9	3

Games since
	Main 12	Standard 9		Rapid 3		Blitz 0
Gender	Female
Age group	U10
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U10	-1		-1		-1
U10 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U10	-1		-1		-1
U10 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U10	-1		-1		-1
U10 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U10	-1		-1		-1
U10 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	12	2.5	20.83	-247.9	1205.4	957.5
Standard	9	2.5	27.78	-188.9	1214.3	1025.4
Rapid	3	0	0	-425	1178.7	753.7
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	12	2.5	20.83	-247.9	1205.4	957.5
Standard	9	2.5	27.78	-188.9	1214.3	1025.4
Rapid	3	0	0	-425	1178.7	753.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1194.4	1196.8	1195.6	1200
2025-09-01	1194.4	1196.8	1195.6	1200
2025-08-01	1194.4	1196.8	1195.6	1200
2025-07-01	1199.7	1199.7	1200	1200
2025-06-01	1199.7	1199.7	1200	1200
2025-05-01	1199.6	1199.5	1200	1200
2025-04-01	1197.3	1196.8	1200	1200
2025-03-01	1200	1200	1200	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-08-01	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
2023-11-01	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	2025 Menlo Open (U10)	2025-07-26	2025-07-26	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
2	Lower West Coast Top Schools 2025 (U19)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	3	0	Yes	Analysis
3	2nd Knight Riders Junior Open 2025 (U10)	2025-03-23	2025-03-23	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Menlo Open (U10)	2025-07-26	2025-07-26	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
2	Lower West Coast Top Schools 2025 (U19)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	3	0	Yes	Analysis
3	2nd Knight Riders Junior Open 2025 (U10)	2025-03-23	2025-03-23	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis

#	Games	Start				End
1	2	Tournament 2025 Menlo Open				Tournament 2025 Menlo Open
		date 2025-07-26	rnd 2	type Standard	result 0.5	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Pistorius, A (Amberley-Rose)				Opponent Viljoen, R (Rouxle)
2	1	Tournament 2nd Knight Riders Junior Open 2025				Tournament 2nd Knight Riders Junior Open 2025
		date 2025-03-23	rnd 5	type Standard	result 1	date 2025-03-23	rnd 5	type Standard	result 1
		Opponent Ndungane, A (Amarachi)				Opponent Ndungane, A (Amarachi)

#	Games	Start				End
1	2	Tournament 2025 Menlo Open				Tournament 2025 Menlo Open
		date 2025-07-26	rnd 2	type Standard	result 0.5	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Pistorius, A (Amberley-Rose)				Opponent Viljoen, R (Rouxle)
2	1	Tournament 2nd Knight Riders Junior Open 2025				Tournament 2nd Knight Riders Junior Open 2025
		date 2025-03-23	rnd 5	type Standard	result 1	date 2025-03-23	rnd 5	type Standard	result 1
		Opponent Ndungane, A (Amarachi)				Opponent Ndungane, A (Amarachi)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament 2025 Menlo Open				Tournament 2025 Menlo Open
		date 2025-07-26	rnd 3	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Viljoen, R (Rouxle)				Opponent Viljoen, R (Rouxle)
2	1	Tournament 2nd Knight Riders Junior Open 2025				Tournament 2nd Knight Riders Junior Open 2025
		date 2025-03-23	rnd 5	type Standard	result 1	date 2025-03-23	rnd 5	type Standard	result 1
		Opponent Ndungane, A (Amarachi)				Opponent Ndungane, A (Amarachi)

#	Games	Start				End
1	1	Tournament 2025 Menlo Open				Tournament 2025 Menlo Open
		date 2025-07-26	rnd 3	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Viljoen, R (Rouxle)				Opponent Viljoen, R (Rouxle)
2	1	Tournament 2nd Knight Riders Junior Open 2025				Tournament 2nd Knight Riders Junior Open 2025
		date 2025-03-23	rnd 5	type Standard	result 1	date 2025-03-23	rnd 5	type Standard	result 1
		Opponent Ndungane, A (Amarachi)				Opponent Ndungane, A (Amarachi)

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	Pistorius ,A (Amberley-Rose)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
1	Pistorius ,A (Amberley-Rose)	1	1077.5	1077.5	1	1069.6	1077.5	0	0	0	0	0	0
2	Ndungane ,A (Amarachi)	1	1	425	1	1	425	0	0	0	0	0	0
2	Ndungane ,A (Amarachi)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Janse Van Rensburg ,A (Ava)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Janse Van Rensburg ,A (Ava)	1	1537.2	1112.2	1	1539.6	1112.2	0	0	0	0	0	0
4	Venter ,S (Stephan)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Venter ,S (Stephan)	1	1121.4	696.4	1	1114.9	696.4	0	0	0	0	0	0
5	Collen ,V (Videl)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Collen ,V (Videl)	1	1198.3	773.3	1	1198.7	773.3	0	0	0	0	0	0
6	Bender ,D (Divan)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Bender ,D (Divan)	1	1187.7	762.7	1	1183.1	762.7	0	0	0	0	0	0
7	Viljoen ,R (Rouxle)	1	1	425	1	1	425	0	0	0	0	0	0
7	Viljoen ,R (Rouxle)	1	1196.8	1621.8	1	1196	1621.8	0	0	0	0	0	0
8	Opperman ,G (Gert)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Opperman ,G (Gert)	1	1208	783	1	1209.2	783	0	0	0	0	0	0
9	Sooganchand ,G (Gia)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Sooganchand ,G (Gia)	1	1202.4	777.4	1	1200.3	777.4	0	0	0	0	0	0
10	Breytenbach ,T (Tristan)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Breytenbach ,T (Tristan)	1	1177.2	752.2	0	0	0	1	1175.4	752.2	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Groenewald, K (Katya)

Ratings

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Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms