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

Item	Main	Standard	Rapid	Blitz
Rating	1174.8	1169.7	1200	1200
Raw rating	1133.9	1120.5	1200	1200
Weighted rating	1174.8	1169.7	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	-4.1	-5	0	0
New rating	1170.6	1164.7	1200	1200
Analysis
Rating	1174.8	1169.7	1200	1200
Raw rating	1133.9	1120.5	1200	1200
Weighted rating	1174.8	1169.7	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	1170.6	1164.7	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1170.6	1164.7	1200	1200
Temp new rating +/-	-4.1	-5	0	0
Final new rating +/-	-4.1	-5	0	0
New rating	1170.6	1164.7	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
2026-01-01	1133.9	1120.5	1200	1200
2025-11-30	1133.9	1120.5	1200	1200
2025-11-01	1133.9	1120.5	1200	1200
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
2024-11-01	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	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

Notifications

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