Chess South Africa Ratings Database

PLAYER PAGE

Personal

Walstra, D (Devon)

Chess SA id

1130314764

FIDE id

Date of birth

2013-07-18 (U14)

Gender

Male

Region

West Rand (GWR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-09

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

870.8

Item	Main	Standard	Rapid	Blitz
Rating	1188.5	1186.1	1200	1200
Raw rating	1133.9	1120.5	1200	1200
Weighted rating	1188.5	1186.1	1200	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	182.2	185.7	165.8	165.8
Highest rating	1199.9 2025-02-10	1199.9 2025-02-10	1200 2025-03-01	1200 2025-03-01
Highest raw rating	1199.9 2025-02-10	1199.9 2025-02-10	1200 2025-03-01	1200 2025-03-01
Highest weighted rating	1199.9 2025-02-10	1199.9 2025-02-10	1200 2025-03-01	1200 2025-03-01
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	-4.8	-5.8	0	0
New rating	1183.7	1180.4	1200	1200
Analysis
Rating	1188.5	1186.1	1200	1200
Raw rating	1133.9	1120.5	1200	1200
Weighted rating	1188.5	1186.1	1200
Weighted performance	0	0	0
K-factor	40	40	36	36
Floor	699.9	699.9	700	700
Max/Min rating change allowed	182.2	185.7	165.8	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	1133.9	1120.5	1200	1200
New weighted rating	1183.7	1180.4	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1183.7	1180.4	1200	1200
Temp new rating +/-	-4.8	-5.8	0	0
Final new rating +/-	-4.8	-5.8	0	0
New rating	1183.7	1180.4	1200	1200
New K-factor	40	40	36	36
New floor	699.9	699.9	700	700

Item	Main	Standard
	0	0
	18	18
	0	0
	0	0
	0	0
	0	0
History	18	18

Games since
	Main 18	Standard 18		Rapid 0		Blitz 0
Gender	Male
Age group	U14
Region	West Rand (GWR)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	18	1.5	8.33	-354.2	1224.9	870.7
Standard	18	1.5	8.33	-354.2	1224.9	870.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	18	1.5	8.33	-354.2	1224.9	870.7
Standard	18	1.5	8.33	-354.2	1224.9	870.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1133.9	1120.5	1200	1200
2025-09-01	1133.9	1120.5	1200	1200
2025-08-01	1198.7	1198.5	1200	1200
2025-07-01	1198.7	1198.5	1200	1200
2025-06-01	1198.4	1198	1200	1200
2025-05-01	1193.2	1191.8	1200	1200
2025-04-01	1196.6	1195.9	1200	1200
2025-03-01	1195.7	1194.7	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	West Rand Women's Day Open 2025 (U12)	2025-08-09	2025-08-09	Standard	West Rand (GWR)	5	4	0	Yes	Analysis
2	FIDE in The West 2025 (Bishops)	2025-04-12	2025-04-12	Standard	West Rand (GWR)	5	5	0	Yes	Analysis
3	West Rand Juniors 2025 (U14)	2025-03-08	2025-03-08	Standard	West Rand (GWR)	5	5	1	Yes	Analysis
4	2025 West Rand Open (Bishops)	2025-02-08	2025-02-08	Standard	West Rand (GWR)	5	4	0.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	West Rand Women's Day Open 2025 (U12)	2025-08-09	2025-08-09	Standard	West Rand (GWR)	5	4	0	Yes	Analysis
2	FIDE in The West 2025 (Bishops)	2025-04-12	2025-04-12	Standard	West Rand (GWR)	5	5	0	Yes	Analysis
3	West Rand Juniors 2025 (U14)	2025-03-08	2025-03-08	Standard	West Rand (GWR)	5	5	1	Yes	Analysis
4	2025 West Rand Open (Bishops)	2025-02-08	2025-02-08	Standard	West Rand (GWR)	5	4	0.5	Yes	Analysis

#	Games	Start				End
1	1	Tournament West Rand Juniors 2025				Tournament West Rand Juniors 2025
		date 2025-03-08	rnd 2	type Standard	result 1	date 2025-03-08	rnd 2	type Standard	result 1
		Opponent Jonker, J (Jolene)				Opponent Jonker, J (Jolene)
2	1	Tournament 2025 West Rand Open				Tournament 2025 West Rand Open
		date 2025-02-08	rnd 3	type Standard	result 0.5	date 2025-02-08	rnd 3	type Standard	result 0.5
		Opponent Gwaza, N (Ntando)				Opponent Gwaza, N (Ntando)

#	Games	Start				End
1	1	Tournament West Rand Juniors 2025				Tournament West Rand Juniors 2025
		date 2025-03-08	rnd 2	type Standard	result 1	date 2025-03-08	rnd 2	type Standard	result 1
		Opponent Jonker, J (Jolene)				Opponent Jonker, J (Jolene)
2	1	Tournament 2025 West Rand Open				Tournament 2025 West Rand Open
		date 2025-02-08	rnd 3	type Standard	result 0.5	date 2025-02-08	rnd 3	type Standard	result 0.5
		Opponent Gwaza, N (Ntando)				Opponent Gwaza, N (Ntando)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament West Rand Juniors 2025				Tournament West Rand Juniors 2025
		date 2025-03-08	rnd 2	type Standard	result 1	date 2025-03-08	rnd 2	type Standard	result 1
		Opponent Jonker, J (Jolene)				Opponent Jonker, J (Jolene)

#	Games	Start				End
1	1	Tournament West Rand Juniors 2025				Tournament West Rand Juniors 2025
		date 2025-03-08	rnd 2	type Standard	result 1	date 2025-03-08	rnd 2	type Standard	result 1
		Opponent Jonker, J (Jolene)				Opponent Jonker, J (Jolene)

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	Magubane ,S (Sibongile)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Magubane ,S (Sibongile)	1	1197.6	772.6	1	1200	772.6	0	0	0	0	0	0
2	Wandemu ,A (Abenezar)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Wandemu ,A (Abenezar)	1	1200	775	1	1200	775	0	0	0	0	0	0
3	Ackerman ,J (Joshua)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Ackerman ,J (Joshua)	1	1196	771	1	1196.5	771	0	0	0	0	0	0
4	Jonker ,J (Jolene)	1	1	425	1	1	425	0	0	0	0	0	0
4	Jonker ,J (Jolene)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	White ,E (Edward)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	White ,E (Edward)	1	1541.8	1116.8	1	1538.1	1116.8	0	0	0	0	0	0
6	Neswiswa ,K (Khano)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Neswiswa ,K (Khano)	1	1133.7	708.7	1	1100.1	708.7	0	0	0	0	0	0
7	Engelbrecht ,Z (Zanika)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Engelbrecht ,Z (Zanika)	1	1176.6	751.6	1	1171	751.6	0	0	0	0	0	0
8	Sapa ,K (Kgomotso)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Sapa ,K (Kgomotso)	1	1202.4	777.4	1	1203.2	777.4	0	0	0	0	0	0
9	Jordaan ,M (Marlo)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Jordaan ,M (Marlo)	1	1226.5	801.5	1	1225.9	801.5	0	0	0	0	0	0
10	Myburgh ,D (Danielle)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Myburgh ,D (Danielle)	1	1177.1	752.1	1	1173	752.1	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

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PLAYER PAGE

Personal

Walstra, D (Devon)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms