Chess South Africa Ratings Database

PLAYER PAGE

Personal

Kooy, B (Bertu)

Chess SA id

1080155580

FIDE id

Date of birth

2008-10-02 (U20)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-09-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1274.9	1280.7	1204.3	1184.6
Raw rating	1274.9	1280.7	1204.3	1184.6
Weighted rating	1274.9	1280.7	1204.3	1184.3
Weighted performance	0	0	0	0
Floor	782.8	780.7	704.3	700
K-factor	36	36	36	36
Min/Max rating change allowed	149	147.8	164.8	169.5
Highest rating	1446.9 2023-07-01	1537.1 2023-07-01	1220.2 2023-05-01	1200 2018-10-01
Highest raw rating	1282.8 2023-09-01	1280.7 2024-02-01	1204.3 2024-02-01	1200 2019-12-01
Highest weighted rating	1282.8 2025-06-01	1280.7 2025-07-01	1204.3 2025-04-01	1200 2018-10-01
Highest weighted performance	1446.9 2023-07-01	1537.1 2023-07-01	1220.2 2023-05-01	1200 2019-12-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1274.9	1280.7	1204.3	1184.6
Analysis
Rating	1274.9	1280.7	1204.3	1184.6
Raw rating	1274.9	1280.7	1204.3	1184.6
Weighted rating	1274.9	1280.7	1204.3
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	782.8	780.7	704.3	700
Max/Min rating change allowed	149	147.8	164.8	169.5
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	1274.9	1280.7	1204.3	1184.6
New weighted rating	1274.9	1280.7	1204.3	1184.3
New weighted performance	0	0	0	0
Temp new rating	1274.9	1280.7	1204.3	1184.6
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1274.9	1280.7	1204.3	1184.6
New K-factor	36	36	36	36
New floor	782.8	780.7	704.3	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	23	10	5	8
	0	0	0	0
	0	0	0	0
History	23	10	5	8

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	23	14	60.87	92.4	1235.1	1327.5
Standard	10	7	70	170	1255.1	1425.1
Rapid	5	3	60	85	1269.5	1354.5
Blitz	8	4	50	0	1188.5	1188.5

Date	Main	Standard	Rapid	Blitz
2026-01-01	1274.9	1280.7	1204.3	1184.6
2025-11-30	1274.9	1280.7	1204.3	1184.6
2025-11-01	1274.9	1280.7	1204.3	1184.6
2025-09-30	1274.9	1280.7	1204.3	1184.6
2025-09-01	1274.9	1280.7	1204.3	1184.6
2025-08-01	1274.9	1280.7	1204.3	1184.6
2025-07-01	1274.9	1280.7	1204.3	1184.6
2025-06-01	1274.9	1280.7	1204.3	1184.6
2025-05-01	1274.9	1280.7	1204.3	1184.6
2025-04-01	1274.9	1280.7	1204.3	1184.6
2025-03-01	1274.9	1280.7	1204.3	1184.6
2025-02-01	1274.9	1280.7	1204.3	1184.6
2025-01-01	1274.9	1280.7	1204.3	1183.4
2024-12-01	1274.9	1280.7	1204.3	1183.4
2024-11-01	1274.9	1280.7	1204.3	1183.4
2024-10-01	1274.9	1280.7	1204.3	1183.4
2024-09-01	1274.9	1280.7	1204.3	1183.4
2024-11-01	1274.9	1280.7	1204.3	1183.4
2024-07-01	1274.9	1280.7	1204.3	1183.4
2024-06-01	1274.9	1280.7	1204.3	1183.4
2024-05-01	1274.9	1280.7	1204.3	1183.4
2024-04-01	1274.9	1280.7	1204.3	1183.4
2024-03-01	1274.9	1280.7	1204.3	1183.4
2024-02-01	1274.9	1280.7	1204.3	1183.4

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	Helpmekaar Kollege Blitz Chess Invitational Sep 2023	2023-09-16	2023-09-16	Blitz	Johannesburg Metro (GJM)	9	8	4	Yes	Analysis
2	2023 Gauteng Top Schools (U15 Mixed)	2023-08-19	2023-08-19	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
3	ThinkChess Tournament 29 July 2023	2023-07-29	2023-07-29	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
4	Gauteng Open Arnold Classic 2023 (U16)	2023-05-19	2023-05-19	Rapid	Tshwane (GTP)	5	5	3	Yes	Analysis

#	Games	Start				End
1	5	Tournament Gauteng Open Arnold Classic 2023				Tournament ThinkChess Tournament 29 July 2023
		date 2023-05-19	rnd 3	type Rapid	result 1	date 2023-07-29	rnd 2	type Standard	result 1
		Opponent Rajah, S (Saahil)				Opponent Mohamed, A (Aram)
2	4	Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023				Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023
		date 2023-09-16	rnd 2	type Blitz	result 1	date 2023-09-16	rnd 6	type Blitz	result 1
		Opponent Coulter, J (Justine)				Opponent Akaloo, D (Deya)
3	4	Tournament ThinkChess Tournament 29 July 2023				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-19	rnd 2	type Standard	result 1
		Opponent Subroyen, J (Jeevesh)				Opponent Van Heerden, F (Frederik)

#	Games	Start				End
1	4	Tournament ThinkChess Tournament 29 July 2023				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-19	rnd 2	type Standard	result 1
		Opponent Subroyen, J (Jeevesh)				Opponent Van Heerden, F (Frederik)
2	2	Tournament ThinkChess Tournament 29 July 2023				Tournament ThinkChess Tournament 29 July 2023
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-07-29	rnd 2	type Standard	result 1
		Opponent Popat, R (Rey)				Opponent Mohamed, A (Aram)
3	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 4	type Standard	result 1	date 2023-08-19	rnd 4	type Standard	result 1
		Opponent Monaledi, O (Otsile)				Opponent Monaledi, O (Otsile)

#	Games	Start				End
1	3	Tournament Gauteng Open Arnold Classic 2023				Tournament Gauteng Open Arnold Classic 2023
		date 2023-05-19	rnd 3	type Rapid	result 1	date 2023-05-19	rnd 5	type Rapid	result 1
		Opponent Rajah, S (Saahil)				Opponent De Lange, B (Bester)

#	Games	Start				End
1	4	Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023				Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023
		date 2023-09-16	rnd 2	type Blitz	result 1	date 2023-09-16	rnd 6	type Blitz	result 1
		Opponent Coulter, J (Justine)				Opponent Akaloo, D (Deya)

#	Games	Start				End
1	5	Tournament Gauteng Open Arnold Classic 2023				Tournament ThinkChess Tournament 29 July 2023
		date 2023-05-19	rnd 3	type Rapid	result 1	date 2023-07-29	rnd 2	type Standard	result 1
		Opponent Rajah, S (Saahil)				Opponent Mohamed, A (Aram)
2	4	Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023				Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023
		date 2023-09-16	rnd 2	type Blitz	result 1	date 2023-09-16	rnd 6	type Blitz	result 1
		Opponent Coulter, J (Justine)				Opponent Akaloo, D (Deya)
3	4	Tournament ThinkChess Tournament 29 July 2023				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-19	rnd 2	type Standard	result 1
		Opponent Subroyen, J (Jeevesh)				Opponent Van Heerden, F (Frederik)

#	Games	Start				End
1	4	Tournament ThinkChess Tournament 29 July 2023				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-19	rnd 2	type Standard	result 1
		Opponent Subroyen, J (Jeevesh)				Opponent Van Heerden, F (Frederik)
2	2	Tournament ThinkChess Tournament 29 July 2023				Tournament ThinkChess Tournament 29 July 2023
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-07-29	rnd 2	type Standard	result 1
		Opponent Popat, R (Rey)				Opponent Mohamed, A (Aram)
3	1	Tournament 2023 Gauteng Top Schools				Tournament 2023 Gauteng Top Schools
		date 2023-08-19	rnd 4	type Standard	result 1	date 2023-08-19	rnd 4	type Standard	result 1
		Opponent Monaledi, O (Otsile)				Opponent Monaledi, O (Otsile)

#	Games	Start				End
1	3	Tournament Gauteng Open Arnold Classic 2023				Tournament Gauteng Open Arnold Classic 2023
		date 2023-05-19	rnd 3	type Rapid	result 1	date 2023-05-19	rnd 5	type Rapid	result 1
		Opponent Rajah, S (Saahil)				Opponent De Lange, B (Bester)

#	Games	Start				End
1	4	Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023				Tournament Helpmekaar Kollege Blitz Chess Invitational Sep 2023
		date 2023-09-16	rnd 2	type Blitz	result 1	date 2023-09-16	rnd 6	type Blitz	result 1
		Opponent Coulter, J (Justine)				Opponent Akaloo, D (Deya)

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	Mohamed ,A (Aram)	1	1	425	1	1	425	0	0	0	0	0	0
1	Mohamed ,A (Aram)	1	1229	1654	1	1231.2	1654	0	0	0	0	0	0
2	Oosthuizen ,L (Ludrick)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Oosthuizen ,L (Ludrick)	1	1236.8	811.8	1	1229.5	811.8	0	0	0	0	0	0
3	Thimane ,S (Siyabonga)	1	1	425	1	1	425	0	0	0	0	0	0
3	Thimane ,S (Siyabonga)	1	1133.9	1558.9	1	1120.4	1558.9	0	0	0	0	0	0
4	Monaledi ,O (Otsile)	1	1	425	1	1	425	0	0	0	0	0	0
4	Monaledi ,O (Otsile)	1	1411.6	1836.6	1	1404	1836.6	0	0	0	0	0	0
5	Barker ,R (Ryan)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Barker ,R (Ryan)	1	1393.9	968.9	1	1400.7	968.9	0	0	0	0	0	0
6	Prinsloo ,G (Gareth)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Prinsloo ,G (Gareth)	1	1234.4	809.4	1	1240.3	809.4	0	0	0	0	0	0
7	Sehloho ,T (Thandolwethu)	1	1	425	1	1	425	0	0	0	0	0	0
7	Sehloho ,T (Thandolwethu)	1	1321.7	1746.7	1	1316.4	1746.7	0	0	0	0	0	0
8	Popat ,R (Rey)	1	1	425	1	1	425	0	0	0	0	0	0
8	Popat ,R (Rey)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Subroyen ,J (Jeevesh)	1	1	425	1	1	425	0	0	0	0	0	0
9	Subroyen ,J (Jeevesh)	1	1189.7	1614.7	1	1189.2	1614.7	0	0	0	0	0	0
10	Whitehead ,J (Jonathan)	1	1	425	0	0	0	1	1	425	0	0	0
10	Whitehead ,J (Jonathan)	1	1200	1625	0	0	0	1	1200	1625	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Kooy, B (Bertu)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms