Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koopman, L (Leo-Arlin)

Chess SA id

1150153170

FIDE id

Date of birth

2015-07-06 (U12)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-12-09

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1211.1	1188.8	1251.8	1200
Raw rating	1210	1188.8	1243.2	1200
Weighted rating	1211.1	1187.4	1251.8	1200
Weighted performance	1153.5	0	1096	0
Floor	727.2	700	752.9	700
K-factor	36	36	36	36
Min/Max rating change allowed	163.5	168.5	155.9	165.8
Highest rating	1227.2 2024-04-01	1200 2018-10-01	1292.7 2024-02-01	1200 2018-10-01
Highest raw rating	1227.2 2024-04-01	1200 2024-03-01	1252.9 2024-04-01	1200 2024-03-01
Highest weighted rating	1211.1 2026-01-01	1200 2018-10-01	1251.8 2026-01-01	1200 2018-10-01
Highest weighted performance	1217.4 2024-02-01	1200 2024-03-01	1292.7 2024-02-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.1	0	-0.5	0
New rating	1211	1188.8	1251.3	1200
Analysis
Rating	1211.1	1188.8	1251.8	1200
Raw rating	1210	1188.8	1243.2	1200
Weighted rating	1211.1	1187.4	1251.8
Weighted performance	1153.5	0	1096
K-factor	36	36	36	36
Floor	727.2	700	752.9	700
Max/Min rating change allowed	163.5	168.5	155.9	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	1210	1188.8	1243.2	1200
New weighted rating	1211	1187.4	1251.3	1200
New weighted performance	1145.5	0	1088	0
Temp new rating	1211	1188.8	1251.3	1200
Temp new rating +/-	-0.1	0	-0.5	0
Final new rating +/-	-0.1	0	-0.5	0
New rating	1211	1188.8	1251.3	1200
New K-factor	36	36	36	36
New floor	727.2	700	752.9	700

Item	Main	Standard	Rapid
	0	0	0
	5	5	0
	16	6	10
	5	0	5
	0	0	0
	0	0	0
History	26	11	15

Games since
	Main 21	Standard 11		Rapid 10		Blitz 0
Gender	Male
Age group	U12
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 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	5	4	80	255	1213	1468
Standard	5	4	80	255	1213	1468
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	26	15	57.69	65.4	1212.4	1277.8
Standard	11	6	54.55	38.6	1255.1	1293.7
Rapid	15	9	60	85	1181	1266
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1210	1188.8	1243.2	1200
2025-11-30	1210.8	1188.8	1252.9	1200
2025-11-01	1210.8	1188.8	1252.9	1200
2025-09-30	1210.8	1188.8	1252.9	1200
2025-09-01	1210.8	1188.8	1252.9	1200
2025-08-01	1210.8	1188.8	1252.9	1200
2025-07-01	1210.8	1188.8	1252.9	1200
2025-06-01	1210.8	1188.8	1252.9	1200
2025-05-01	1210.8	1188.8	1252.9	1200
2025-04-01	1210.8	1188.8	1252.9	1200
2025-03-01	1210.8	1188.8	1252.9	1200
2025-02-01	1210.8	1188.5	1252.9	1200
2025-01-01	1210.8	1180.9	1252.9	1200
2024-12-01	1210.8	1180.9	1252.9	1200
2024-11-01	1210.8	1180.9	1252.9	1200
2024-10-01	1210.8	1180.9	1252.9	1200
2024-09-01	1210.8	1180.9	1252.9	1200
2024-11-01	1210.8	1180.9	1252.9	1200
2024-07-01	1210.8	1180.9	1252.9	1200
2024-06-01	1210.8	1180.9	1252.9	1200
2024-05-01	1227.2	1200	1252.9	1200
2024-04-01	1227.2	1200	1252.9	1200
2024-03-01	1221.6	1200	1243.2	1200
2024-02-01	1187	1200	1184	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	Six Gun Grill Summer Sport Festival Chess Championships 2025 (Individual U11 Boys)	2025-12-09	2025-12-09	Rapid	Cape Winelands (WCW)	5	4	0	Yes	Analysis
2	Six Gun Grill Summer Sport Festival Chess Championships 2025 (Team U11)	2025-12-08	2025-12-08	Rapid	Cape Winelands (WCW)	5	4	3	Yes	Analysis
3	Laerskool Calvinia - Calvie Skaakklub Toernooi 2025 (U10)	2025-11-08	2025-11-08	Standard	Namakwa (NCN)	5	5	4	Yes	Analysis
4	Western Cape PS Individuals Championship 2024 (U9 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	2	Yes	Analysis
5	West Coast Schools Chess Prestige Championships 2024 (U9 Boys)	2024-03-09	2024-03-09	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
6	Bo-Weskus Skole Prestige 2024 (O9 Seuns)	2024-02-10	2024-02-10	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
7	Bo-Weskus Skole Prestige 2023 (O9 Seuns)	2023-03-04	2023-03-04	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis

#	Games	Start				End
1	3	Tournament Bo-Weskus Skole Prestige 2024				Tournament Bo-Weskus Skole Prestige 2024
		date 2024-02-10	rnd 3	type Rapid	result 1	date 2024-02-10	rnd 5	type Rapid	result 1
		Opponent Esterhuyse, N (Nicol)				Opponent Sacco, A (Aldrin)
2	3	Tournament Bo-Weskus Skole Prestige 2023				Tournament Bo-Weskus Skole Prestige 2024
		date 2023-03-04	rnd 4	type Rapid	result 0.5	date 2024-02-10	rnd 1	type Rapid	result 1
		Opponent Milford, M (Mihasquo)				Opponent Mouton, L (Luhaygo)
3	2	Tournament West Coast Schools Chess Prestige Championships 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-03-09	rnd 2	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Oberholzer, J (Justin)				Opponent Esterhuyse, N (Nicol)

#	Games	Start				End
1	1	Tournament Western Cape PS Individuals Championship 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-05-05	rnd 6	type Standard	result 1	date 2024-05-05	rnd 6	type Standard	result 1
		Opponent Marner, L (Loannes)				Opponent Marner, L (Loannes)
2	1	Tournament Western Cape PS Individuals Championship 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-05-04	rnd 4	type Standard	result 1	date 2024-05-04	rnd 4	type Standard	result 1
		Opponent Van Eeden, C (Christiaan)				Opponent Van Eeden, C (Christiaan)

#	Games	Start				End
1	3	Tournament Bo-Weskus Skole Prestige 2024				Tournament Bo-Weskus Skole Prestige 2024
		date 2024-02-10	rnd 3	type Rapid	result 1	date 2024-02-10	rnd 5	type Rapid	result 1
		Opponent Esterhuyse, N (Nicol)				Opponent Sacco, A (Aldrin)
2	3	Tournament Bo-Weskus Skole Prestige 2023				Tournament Bo-Weskus Skole Prestige 2024
		date 2023-03-04	rnd 4	type Rapid	result 0.5	date 2024-02-10	rnd 1	type Rapid	result 1
		Opponent Milford, M (Mihasquo)				Opponent Mouton, L (Luhaygo)
3	2	Tournament West Coast Schools Chess Prestige Championships 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-03-09	rnd 2	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Oberholzer, J (Justin)				Opponent Esterhuyse, N (Nicol)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Bo-Weskus Skole Prestige 2024				Tournament Bo-Weskus Skole Prestige 2024
		date 2024-02-10	rnd 3	type Rapid	result 1	date 2024-02-10	rnd 5	type Rapid	result 1
		Opponent Esterhuyse, N (Nicol)				Opponent Sacco, A (Aldrin)
2	2	Tournament West Coast Schools Chess Prestige Championships 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-03-09	rnd 2	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Oberholzer, J (Justin)				Opponent Esterhuyse, N (Nicol)
3	1	Tournament Western Cape PS Individuals Championship 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-05-05	rnd 6	type Standard	result 1	date 2024-05-05	rnd 6	type Standard	result 1
		Opponent Marner, L (Loannes)				Opponent Marner, L (Loannes)

#	Games	Start				End
1	1	Tournament Western Cape PS Individuals Championship 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-05-05	rnd 6	type Standard	result 1	date 2024-05-05	rnd 6	type Standard	result 1
		Opponent Marner, L (Loannes)				Opponent Marner, L (Loannes)
2	1	Tournament Western Cape PS Individuals Championship 2024				Tournament Western Cape PS Individuals Championship 2024
		date 2024-05-04	rnd 4	type Standard	result 1	date 2024-05-04	rnd 4	type Standard	result 1
		Opponent Van Eeden, C (Christiaan)				Opponent Van Eeden, C (Christiaan)

#	Games	Start				End
1	3	Tournament Bo-Weskus Skole Prestige 2024				Tournament Bo-Weskus Skole Prestige 2024
		date 2024-02-10	rnd 3	type Rapid	result 1	date 2024-02-10	rnd 5	type Rapid	result 1
		Opponent Esterhuyse, N (Nicol)				Opponent Sacco, A (Aldrin)
2	2	Tournament West Coast Schools Chess Prestige Championships 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-03-09	rnd 2	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Oberholzer, J (Justin)				Opponent Esterhuyse, N (Nicol)
3	1	Tournament West Coast Schools Chess Prestige Championships 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-03-09	rnd 5	type Rapid	result 1	date 2024-03-09	rnd 5	type Rapid	result 1
		Opponent Chetty, D (Duke)				Opponent Chetty, D (Duke)

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	Steenkamp ,W (Willem)	3	0	-425	1	0	-425	2	0	-425	0	0	0
1	Steenkamp ,W (Willem)	3	1239.9	814.9	1	1122.8	814.9	2	1325.7	814.9	0	0	0
2	Van Wyk ,N (Nicolaas)	2	2	425	1	1	425	1	1	425	0	0	0
2	Van Wyk ,N (Nicolaas)	2	1243.4	1668.4	1	1176.4	1668.4	1	1290.4	1668.4	0	0	0
3	Esterhuyse ,N (Nicol)	2	2	425	0	0	0	2	2	425	0	0	0
3	Esterhuyse ,N (Nicol)	2	1192.6	1617.6	0	0	0	2	1187.8	1617.6	0	0	0
4	Van Wyk ,L (Lara)	1	1	425	1	1	425	0	0	0	0	0	0
4	Van Wyk ,L (Lara)	1	1223.3	1648.3	1	1198.8	1648.3	0	0	0	0	0	0
5	Marner ,L (Loannes)	1	1	425	1	1	425	0	0	0	0	0	0
5	Marner ,L (Loannes)	1	1339.2	1764.2	1	1401.1	1764.2	0	0	0	0	0	0
6	Musakwa ,C (Cole)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Musakwa ,C (Cole)	1	1353.9	928.9	1	1338.1	928.9	0	0	0	0	0	0
7	Burnett ,T (Tomas)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Burnett ,T (Tomas)	1	1294.2	869.2	1	1270.6	869.2	0	0	0	0	0	0
8	Davids ,S (Sihan)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Davids ,S (Sihan)	1	1187	762	1	1200	762	0	0	0	0	0	0
9	Van Eeden ,C (Christiaan)	1	1	425	1	1	425	0	0	0	0	0	0
9	Van Eeden ,C (Christiaan)	1	1144.7	1569.7	1	1116.1	1569.7	0	0	0	0	0	0
10	Pienaar ,A (Aiden)	1	1	425	1	1	425	0	0	0	0	0	0
10	Pienaar ,A (Aiden)	1	1200	1625	1	1200	1625	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

Koopman, L (Leo-Arlin)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms