Chess South Africa Ratings Database

PLAYER PAGE

Personal

Diederiks, K (Katryn)

Chess SA id

2110150081

FIDE id

Date of birth

2011-02-14 (U16)

Gender

Female

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-02-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1084.2	1086	1105.3	1200
Raw rating	1084.1	1086	1105.3	1200
Weighted rating	1084.2	1085.7	1105.2	1200
Weighted performance	792.6	0	767	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	195.6	195.1	189.8	165.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1200 2019-12-01	1200 2019-12-01	1200 2019-12-01	1200 2024-03-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	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	1084.2	1086	1105.3	1200
Analysis
Rating	1084.2	1086	1105.3	1200
Raw rating	1084.1	1086	1105.3	1200
Weighted rating	1084.2	1085.7	1105.2
Weighted performance	792.6	0	767
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	195.6	195.1	189.8	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	1084.1	1086	1105.3	1200
New weighted rating	1084.2	1085.8	1105.2	1200
New weighted performance	792.3	0	766.6	0
Temp new rating	1084.2	1086	1105.3	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1084.2	1086	1105.3	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard	Rapid
	0	0	0
	6	0	6
	5	5	0
	22	5	17
	16	11	5
	0	0	0
History	49	21	28

Games since
	Main 11	Standard 5		Rapid 6		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	1	16.67	-283.3	1230.1	946.8
Standard	0	0	0	0	0	0
Rapid	6	1	16.67	-283.3	1230.1	946.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	49	14.5	29.59	-173.5	1203.6	1030.2
Standard	21	6	28.57	-182.1	1206.5	1024.3
Rapid	28	8.5	30.36	-167	1201.5	1034.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1084.1	1086	1105.3	1200
2025-09-01	1084.1	1086	1105.3	1200
2025-08-01	1084.1	1086	1105.3	1200
2025-07-01	1084.1	1086	1105.3	1200
2025-06-01	1084	1086	1105.3	1200
2025-05-01	1084	1086	1105.3	1200
2025-04-01	1083.9	1086	1105.1	1200
2025-03-01	1082.5	1086	1102.2	1200
2025-02-01	1084.8	1086	1105.7	1200
2025-01-01	1084.8	1086	1105.6	1200
2024-12-01	1084.8	1086	1105.6	1200
2024-11-01	1084.8	1086	1105.6	1200
2024-10-01	1084.8	1086	1105.6	1200
2024-09-01	1084.8	1086	1105.6	1200
2024-08-01	1084.8	1086	1105.6	1200
2024-07-01	1084.8	1086	1105.6	1200
2024-06-01	1084.8	1086	1105.6	1200
2024-08-01	1084.8	1086	1105.6	1200
2024-04-01	1084.8	1086	1105.6	1200
2024-03-01	1082.1	1080	1105.6	1200
2024-02-01	1082.1	1080	1105.6	1200
2024-01-01	1082.1	1080	1105.6	1200
2023-12-01	1082.1	1080	1105.6	1200
2023-11-01	1082.1	1080	1105.6	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	Curro Hermanus Summer Open 2025 (U15)	2025-02-08	2025-02-08	Rapid	Overberg (WOS)	6	6	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Curro Hermanus Summer Open 2025 (U15)	2025-02-08	2025-02-08	Rapid	Overberg (WOS)	6	6	1	Yes	Analysis
2	Overberg Schools - PS Closed 2024 (U13 Girls)	2024-03-16	2024-03-16	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
3	Hermanus Rapid 2023 (C)	2023-04-22	2023-04-22	Rapid	Overberg (WOS)	6	6	2	Yes	Analysis
4	Overberg School Chess Closed Tournament 2023 (U11 Girls)	2023-03-25	2023-03-25	Standard	Overberg (WOS)	5	5	1.5	Yes	Analysis
5	Overberg Schools Bredasdorp Zone Trails 2023 (U11)	2023-02-16	2023-03-02	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
6	Overberg Schools Open Tournament 2023 (U12)	2023-02-11	2023-02-11	Rapid	Overberg (WOS)	5	5	2	Yes	Analysis
7	Western Cape Top Schools 2022 (U11 Mix)	2022-09-16	2022-09-17	Standard	Overberg (WOS)	5	2	0	Yes	Analysis
8	Overberg Topskole 2022 (O11)	2022-08-30	2022-08-30	Standard	Overberg (WOS)	6	4	1	Yes	Analysis
9	The Hermanus Open 2022 (U12)	2022-05-14	2022-05-14	Rapid	Overberg (WOS)	6	5	1	Yes	Analysis
10	Overberg Primary Schools Closed 2022 (U11 Girls)	2022-03-12	2022-03-12	Standard	Overberg (WOS)	5	5	1.5	Yes	Analysis

#	Games	Start				End
1	2	Tournament Hermanus Rapid 2023				Tournament Overberg Schools - PS Closed 2024
		date 2023-04-22	rnd 6	type Rapid	result 0.5	date 2024-03-16	rnd 1	type Standard	result 1
		Opponent Hanekom, D (Derick)				Opponent Oosthuizen, A (Alana)
2	2	Tournament Overberg Primary Schools Closed 2022				Tournament Overberg Primary Schools Closed 2022
		date 2022-03-12	rnd 3	type Standard	result 1	date 2022-03-12	rnd 4	type Standard	result 0.5
		Opponent Van Den Berg, P (Petro)				Opponent Blignaut, L (Liza)
3	1	Tournament Curro Hermanus Summer Open 2025				Tournament Curro Hermanus Summer Open 2025
		date 2025-02-08	rnd 4	type Rapid	result 1	date 2025-02-08	rnd 4	type Rapid	result 1
		Opponent Labuschagne, T (Tiaan)				Opponent Labuschagne, T (Tiaan)

#	Games	Start				End
1	2	Tournament Overberg Primary Schools Closed 2022				Tournament Overberg Primary Schools Closed 2022
		date 2022-03-12	rnd 3	type Standard	result 1	date 2022-03-12	rnd 4	type Standard	result 0.5
		Opponent Van Den Berg, P (Petro)				Opponent Blignaut, L (Liza)
2	1	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 5	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Witbooi, C (Carla)				Opponent Witbooi, C (Carla)
3	1	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 1	type Standard	result 1	date 2024-03-16	rnd 1	type Standard	result 1
		Opponent Oosthuizen, A (Alana)				Opponent Oosthuizen, A (Alana)

#	Games	Start				End
1	2	Tournament Overberg Schools Bredasdorp Zone Trails 2023				Tournament Hermanus Rapid 2023
		date 2023-03-02	rnd 6	type Rapid	result 0.5	date 2023-04-22	rnd 1	type Rapid	result 0.5
		Opponent Moses, J (Jivano)				Opponent Jam Jam, B (Buhle)
2	1	Tournament Curro Hermanus Summer Open 2025				Tournament Curro Hermanus Summer Open 2025
		date 2025-02-08	rnd 4	type Rapid	result 1	date 2025-02-08	rnd 4	type Rapid	result 1
		Opponent Labuschagne, T (Tiaan)				Opponent Labuschagne, T (Tiaan)
3	1	Tournament Hermanus Rapid 2023				Tournament Hermanus Rapid 2023
		date 2023-04-22	rnd 6	type Rapid	result 0.5	date 2023-04-22	rnd 6	type Rapid	result 0.5
		Opponent Hanekom, D (Derick)				Opponent Hanekom, D (Derick)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Curro Hermanus Summer Open 2025				Tournament Curro Hermanus Summer Open 2025
		date 2025-02-08	rnd 4	type Rapid	result 1	date 2025-02-08	rnd 4	type Rapid	result 1
		Opponent Labuschagne, T (Tiaan)				Opponent Labuschagne, T (Tiaan)
2	1	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 5	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Witbooi, C (Carla)				Opponent Witbooi, C (Carla)
3	1	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 1	type Standard	result 1	date 2024-03-16	rnd 1	type Standard	result 1
		Opponent Oosthuizen, A (Alana)				Opponent Oosthuizen, A (Alana)

#	Games	Start				End
1	1	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 5	type Standard	result 1	date 2024-03-16	rnd 5	type Standard	result 1
		Opponent Witbooi, C (Carla)				Opponent Witbooi, C (Carla)
2	1	Tournament Overberg Schools - PS Closed 2024				Tournament Overberg Schools - PS Closed 2024
		date 2024-03-16	rnd 1	type Standard	result 1	date 2024-03-16	rnd 1	type Standard	result 1
		Opponent Oosthuizen, A (Alana)				Opponent Oosthuizen, A (Alana)
3	1	Tournament Overberg School Chess Closed Tournament 2023				Tournament Overberg School Chess Closed Tournament 2023
		date 2023-03-25	rnd 2	type Standard	result 1	date 2023-03-25	rnd 2	type Standard	result 1
		Opponent Kotze, M (Marlie)				Opponent Kotze, M (Marlie)

#	Games	Start				End
1	1	Tournament Curro Hermanus Summer Open 2025				Tournament Curro Hermanus Summer Open 2025
		date 2025-02-08	rnd 4	type Rapid	result 1	date 2025-02-08	rnd 4	type Rapid	result 1
		Opponent Labuschagne, T (Tiaan)				Opponent Labuschagne, T (Tiaan)
2	1	Tournament Hermanus Rapid 2023				Tournament Hermanus Rapid 2023
		date 2023-04-22	rnd 4	type Rapid	result 1	date 2023-04-22	rnd 4	type Rapid	result 1
		Opponent Rock, A (Albert)				Opponent Rock, A (Albert)
3	1	Tournament Overberg Schools Bredasdorp Zone Trails 2023				Tournament Overberg Schools Bredasdorp Zone Trails 2023
		date 2023-03-02	rnd 4	type Rapid	result 1	date 2023-03-02	rnd 4	type Rapid	result 1
		Opponent Adshade, L (Lea-Linize)				Opponent Adshade, L (Lea-Linize)

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	Fortuin ,E (Eron)	2	0	-425	2	0	-425	0	0	0	0	0	0
1	Fortuin ,E (Eron)	2	1179.3	754.3	2	1179.3	754.3	0	0	0	0	0	0
2	Nqoza ,U (Usenathi)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Nqoza ,U (Usenathi)	2	1200	775	2	1200	775	0	0	0	0	0	0
3	Van Der Westhuizen ,M (Mika)	2	0	-425	1	0	-425	1	0	-425	0	0	0
3	Van Der Westhuizen ,M (Mika)	2	1202.9	777.9	1	1160.8	777.9	1	1276.8	777.9	0	0	0
4	Spinnler ,E (Elizabeth Hendrina)	2	0	-425	1	0	-425	1	0	-425	0	0	0
4	Spinnler ,E (Elizabeth Hendrina)	2	1170.3	745.3	1	1200	745.3	1	1148.4	745.3	0	0	0
5	Ntontelo ,K (Khazimla)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Ntontelo ,K (Khazimla)	1	1377.7	952.7	1	1366.5	952.7	0	0	0	0	0	0
6	Van Der Merwe ,D (Dante)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Van Der Merwe ,D (Dante)	1	1134.3	709.3	1	1120.8	709.3	0	0	0	0	0	0
7	Beets ,L (Lisa)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
7	Beets ,L (Lisa)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
8	Van Den Berg ,P (Petro)	1	1	425	1	1	425	0	0	0	0	0	0
8	Van Den Berg ,P (Petro)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Van Den Heever ,A (Anita)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Van Den Heever ,A (Anita)	1	1306.7	881.7	1	1308.3	881.7	0	0	0	0	0	0
10	Witbooi ,C (Carla)	1	1	425	1	1	425	0	0	0	0	0	0
10	Witbooi ,C (Carla)	1	1162.1	1587.1	1	1200	1587.1	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Diederiks, K (Katryn)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms