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

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1197.4	1198.4	1198.1	1200
Raw rating	1194.4	1196.8	1195.6	1200
Weighted rating	1197.4	1198.4	1198.1	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	-0.3	-0.2	-0.3	0
New rating	1197.1	1198.2	1197.8	1200
Analysis
Rating	1197.4	1198.4	1198.1	1200
Raw rating	1194.4	1196.8	1195.6	1200
Weighted rating	1197.4	1198.4	1198.1
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	1197.1	1198.2	1197.8	1200
New weighted performance	0	0	0	0
Temp new rating	1197.1	1198.2	1197.8	1200
Temp new rating +/-	-0.3	-0.2	-0.3	0
Final new rating +/-	-0.3	-0.2	-0.3	0
New rating	1197.1	1198.2	1197.8	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
2026-01-01	1194.4	1196.8	1195.6	1200
2025-11-30	1194.4	1196.8	1195.6	1200
2025-11-01	1194.4	1196.8	1195.6	1200
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
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	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

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	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

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms