Chess South Africa Ratings Database

PLAYER PAGE

Personal

Perry, D (David)

Chess SA id

105047603

FIDE id

Date of birth

2005-08-25 (Adult)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2022-08-13

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	922.1	910	636.7	525.2
Raw rating	922.1	910	636.7	525.2
Weighted rating	922.1	910	636.6	525.2
Weighted performance	494.6	366.1	0	0
Floor	500	500	500	500
K-factor	40	40	40	40
Min/Max rating change allowed	246.4	250.6	370	433.7
Highest rating	1200 2018-02-01	1200 2018-02-01	1200 2020-01-01	1200 2024-02-01
Highest raw rating	949 2022-06-01	940.8 2022-06-01	636.7 2024-02-01	525.2 2024-02-01
Highest weighted rating	949 2024-11-01	940.8 2024-11-01	636.7 2024-11-01	525.2 2024-11-01
Highest weighted performance	1200 2018-02-01	1200 2018-02-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	922.1	910	636.7	525.2
Analysis
Rating	922.1	910	636.7	525.2
Raw rating	922.1	910	636.7	525.2
Weighted rating	922.1	910	636.6
Weighted performance	494.6	366.1	0
K-factor	40	40	40	40
Floor	500	500	500	500
Max/Min rating change allowed	246.4	250.6	370	433.7
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	922.1	910	636.7	525.2
New weighted rating	922.1	910	636.7	525.2
New weighted performance	488.5	360.3	0	0
Temp new rating	922.1	910	636.7	525.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	922.1	910	636.7	525.2
New K-factor	40	40	40	40
New floor	500	500	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	14	9	5
	0	0	0
History	79	68	11

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	33	15	45.45	-38.6	1158.6	1120
Standard	28	12	42.86	-60.7	1134.4	1073.7
Rapid	5	3	60	85	1294.1	1379.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	922.1	910	636.7	525.2
2025-09-30	922.1	910	636.7	525.2
2025-09-01	922.1	910	636.7	525.2
2025-08-01	922.1	910	636.7	525.2
2025-07-01	922.1	910	636.7	525.2
2025-06-01	922.1	910	636.7	525.2
2025-05-01	922.1	910	636.7	525.2
2025-04-01	922.1	910	636.7	525.2
2025-03-01	922.1	910	636.7	525.2
2025-02-01	922.1	910	636.7	525.2
2025-01-01	922.1	910	636.7	525.2
2024-12-01	922.1	910	636.7	525.2
2024-11-01	922.1	910	636.7	525.2
2024-10-01	922.1	910	636.7	525.2
2024-09-01	922.1	910	636.7	525.2
2024-08-01	922.1	910	636.7	525.2
2024-07-01	922.1	910	636.7	525.2
2024-09-01	922.1	910	636.7	525.2
2024-05-01	922.1	910	636.7	525.2
2024-04-01	922.1	910	636.7	525.2
2024-03-01	922.1	910	636.7	525.2
2024-02-01	922.1	910	636.7	525.2
2024-01-01	922.1	910	636.7	525.2
2023-12-01	922.1	910	624.8	525.2

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	Ekurhuleni-North Schools Teams 2022 (U18)	2022-08-13	2022-08-13	Standard	Ekurhuleni (GE)	5	4	0	Yes	Analysis
2	Ekurhuleni-North Schools Finals Indiv 2022 (U18 Boys)	2022-05-14	2022-05-14	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
3	Benoni Cluster HS Individuals 2022 (U18 Boys)	2022-05-07	2022-05-07	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis
4	2018 Gauteng League Final (U13)	2018-08-24	2018-08-24	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
5	Ekurhuleni North District Schools Final 2018 (U13)	2018-08-04	2018-08-04	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
6	2018 Gauteng Secondary Schools Individual Chess Championships (U13 Boys)	2018-05-25	2018-05-25	Standard	Tshwane (GTP)	5	4	0	Yes	Analysis
7	Ekurhuleni North Schools Individuals 2018 (U13 Boys)	2018-05-12	2018-05-12	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis

#	Games	Start				End
1	3	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North District Schools Final 2018
		date 2018-08-04	rnd 1	type Standard	result 1	date 2018-08-04	rnd 3	type Standard	result 1
		Opponent Mashaba, L (Lesedi)				Opponent Dooms, R (Rhyzer)
2	3	Tournament Ekurhuleni North Schools Individuals 2018				Tournament Ekurhuleni North Schools Individuals 2018
		date 2018-05-12	rnd 1	type Standard	result 1	date 2018-05-12	rnd 3	type Standard	result 1
		Opponent Mohokare, I (Innocent)				Opponent Devy, M (Michael)
3	2	Tournament Benoni Cluster HS Individuals 2022				Tournament Benoni Cluster HS Individuals 2022
		date 2022-05-07	rnd 1	type Rapid	result 1	date 2022-05-07	rnd 2	type Rapid	result 1
		Opponent Nelson, D (Donovan)				Opponent Katlego, M (Mofokeng)

#	Games	Start				End
1	3	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North District Schools Final 2018
		date 2018-08-04	rnd 1	type Standard	result 1	date 2018-08-04	rnd 3	type Standard	result 1
		Opponent Mashaba, L (Lesedi)				Opponent Dooms, R (Rhyzer)
2	3	Tournament Ekurhuleni North Schools Individuals 2018				Tournament Ekurhuleni North Schools Individuals 2018
		date 2018-05-12	rnd 1	type Standard	result 1	date 2018-05-12	rnd 3	type Standard	result 1
		Opponent Mohokare, I (Innocent)				Opponent Devy, M (Michael)
3	2	Tournament Ekurhuleni North District Schools Final 2018				Tournament 2018 Gauteng League Final
		date 2018-08-04	rnd 5	type Standard	result 1	date 2018-08-24	rnd 1	type Standard	result 1
		Opponent He, N (Nickson)				Opponent Lombard, C (Christoff)

#	Games	Start				End
1	2	Tournament Benoni Cluster HS Individuals 2022				Tournament Benoni Cluster HS Individuals 2022
		date 2022-05-07	rnd 1	type Rapid	result 1	date 2022-05-07	rnd 2	type Rapid	result 1
		Opponent Nelson, D (Donovan)				Opponent Katlego, M (Mofokeng)
2	1	Tournament Benoni Cluster HS Individuals 2022				Tournament Benoni Cluster HS Individuals 2022
		date 2022-05-07	rnd 4	type Rapid	result 1	date 2022-05-07	rnd 4	type Rapid	result 1
		Opponent Patterson, A (Alex)				Opponent Patterson, A (Alex)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North District Schools Final 2018
		date 2018-08-04	rnd 1	type Standard	result 1	date 2018-08-04	rnd 3	type Standard	result 1
		Opponent Mashaba, L (Lesedi)				Opponent Dooms, R (Rhyzer)
2	3	Tournament Ekurhuleni North Schools Individuals 2018				Tournament Ekurhuleni North Schools Individuals 2018
		date 2018-05-12	rnd 1	type Standard	result 1	date 2018-05-12	rnd 3	type Standard	result 1
		Opponent Mohokare, I (Innocent)				Opponent Devy, M (Michael)
3	2	Tournament Benoni Cluster HS Individuals 2022				Tournament Benoni Cluster HS Individuals 2022
		date 2022-05-07	rnd 1	type Rapid	result 1	date 2022-05-07	rnd 2	type Rapid	result 1
		Opponent Nelson, D (Donovan)				Opponent Katlego, M (Mofokeng)

#	Games	Start				End
1	3	Tournament Ekurhuleni North District Schools Final 2018				Tournament Ekurhuleni North District Schools Final 2018
		date 2018-08-04	rnd 1	type Standard	result 1	date 2018-08-04	rnd 3	type Standard	result 1
		Opponent Mashaba, L (Lesedi)				Opponent Dooms, R (Rhyzer)
2	3	Tournament Ekurhuleni North Schools Individuals 2018				Tournament Ekurhuleni North Schools Individuals 2018
		date 2018-05-12	rnd 1	type Standard	result 1	date 2018-05-12	rnd 3	type Standard	result 1
		Opponent Mohokare, I (Innocent)				Opponent Devy, M (Michael)
3	2	Tournament Ekurhuleni North District Schools Final 2018				Tournament 2018 Gauteng League Final
		date 2018-08-04	rnd 5	type Standard	result 1	date 2018-08-24	rnd 1	type Standard	result 1
		Opponent He, N (Nickson)				Opponent Lombard, C (Christoff)

#	Games	Start				End
1	2	Tournament Benoni Cluster HS Individuals 2022				Tournament Benoni Cluster HS Individuals 2022
		date 2022-05-07	rnd 1	type Rapid	result 1	date 2022-05-07	rnd 2	type Rapid	result 1
		Opponent Nelson, D (Donovan)				Opponent Katlego, M (Mofokeng)
2	1	Tournament Benoni Cluster HS Individuals 2022				Tournament Benoni Cluster HS Individuals 2022
		date 2022-05-07	rnd 4	type Rapid	result 1	date 2022-05-07	rnd 4	type Rapid	result 1
		Opponent Patterson, A (Alex)				Opponent Patterson, A (Alex)

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	Terblanche ,F (Fred)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Terblanche ,F (Fred)	1	1021.7	596.7	1	1036.8	596.7	0	0	0	0	0	0
2	Vallaro ,M (Matteo Riccardo)	1	1	425	1	1	425	0	0	0	0	0	0
2	Vallaro ,M (Matteo Riccardo)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Ngobeni ,P (Phenyo)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Ngobeni ,P (Phenyo)	1	1264.1	839.1	1	1277.2	839.1	0	0	0	0	0	0
4	De Wet ,Z (Zack)	1	1	425	1	1	425	0	0	0	0	0	0
4	De Wet ,Z (Zack)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Devy ,M (Michael)	1	1	425	1	1	425	0	0	0	0	0	0
5	Devy ,M (Michael)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Hanekom ,D (Dylan)	1	1	425	1	1	425	0	0	0	0	0	0
6	Hanekom ,D (Dylan)	1	1006	1431	1	1005.5	1431	0	0	0	0	0	0
7	He ,N (Nickson)	1	1	425	1	1	425	0	0	0	0	0	0
7	He ,N (Nickson)	1	1174.1	1599.1	1	1169.2	1599.1	0	0	0	0	0	0
8	Mgimeti ,N (Ndzalama Musa)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Mgimeti ,N (Ndzalama Musa)	1	1200	775	1	1200	775	0	0	0	0	0	0
9	Mashapa ,M (Mathibela)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Mashapa ,M (Mathibela)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Mqathi ,C (Caleb)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Mqathi ,C (Caleb)	1	1200	775	1	1200	775	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Perry, D (David)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms