Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koopman, J (Juan)

Chess SA id

1110150938

FIDE id

Date of birth

2011-09-22 (U16)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1292.4

Item	Main	Standard	Rapid	Blitz
Rating	1251.7	1256.7	1200	1200
Raw rating	1251.7	1256.7	1200	1200
Weighted rating	1233.4	1236.3	1200	1200
Weighted performance	1164.1	1163.3	0	0
Floor	751.7	756.7	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	154	152.9	165.8	165.8
Highest rating	1292.5 2023-02-01	1292.5 2023-02-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1251.7 2025-09-01	1256.7 2025-09-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1227.8 2025-09-01	1230.1 2025-09-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1292.5 2023-02-01	1292.5 2023-02-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1251.7	1256.7	1200	1200
Analysis
Rating	1251.7	1256.7	1200	1200
Raw rating	1251.7	1256.7	1200	1200
Weighted rating	1233.4	1236.3	1200
Weighted performance	1164.1	1163.3	0
K-factor	36	36	36	36
Floor	751.7	756.7	700	700
Max/Min rating change allowed	154	152.9	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	1251.7	1256.7	1200	1200
New weighted rating	1235.8	1239	1200	1200
New weighted performance	1156.5	1155.7	0	0
Temp new rating	1251.7	1256.7	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1251.7	1256.7	1200	1200
New K-factor	36	36	36	36
New floor	751.7	756.7	700	700

Item	Main	Standard
	0	0
	10	10
	19	19
	19	19
	0	0
	0	0
History	48	48

Games since
	Main 29	Standard 29		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	10	5	50	0	1303.5	1303.5
Standard	10	5	50	0	1303.5	1303.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	48	20.5	42.71	-62	1279.3	1217.3
Standard	48	20.5	42.71	-62	1279.3	1217.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1251.7	1256.7	1200	1200
2025-09-30	1251.7	1256.7	1200	1200
2025-09-01	1251.7	1256.7	1200	1200
2025-08-01	1239.8	1244.2	1200	1200
2025-07-01	1239.8	1244.2	1200	1200
2025-06-01	1239.8	1244.2	1200	1200
2025-05-01	1239.8	1244.2	1200	1200
2025-04-01	1239.8	1244.2	1200	1200
2025-03-01	1224.4	1225.6	1200	1200
2025-02-01	1224.4	1225.6	1200	1200
2025-01-01	1224.4	1225.6	1200	1200
2024-12-01	1224.4	1225.6	1200	1200
2024-11-01	1224.4	1225.6	1200	1200
2024-10-01	1224.4	1225.6	1200	1200
2024-09-01	1224.4	1225.6	1200	1200
2024-08-01	1224.4	1225.6	1200	1200
2024-07-01	1224.4	1225.6	1200	1200
2024-09-01	1224.4	1225.6	1200	1200
2024-05-01	1219.2	1222.3	1200	1200
2024-04-01	1219.2	1222.3	1200	1200
2024-03-01	1150.5	1142.4	1200	1200
2024-02-01	1176.5	1171.6	1200	1200
2024-01-01	1176.5	1171.6	1200	1200
2023-12-01	1176.5	1171.6	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	Eden Top Schools 2025 (U15)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	5	2	Yes	Analysis
2	Eden Schools Chess Trials 1 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Eden Top Schools 2025 (U15)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	5	2	Yes	Analysis
2	Eden Schools Chess Trials 1 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3	Yes	Analysis
3	Western Cape PS Individuals Championship 2024 (U13 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	2	Yes	Analysis
4	Eden School Chess Trials 1 2024 (U13 Boys)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
5	Kannaland Proewe 2 2024 (U13 Boys)	2024-02-24	2024-02-24	Standard	Eden (WEG)	5	4	2	Yes	Analysis
6	Kannaland Proewe 1 (U13 Boys)	2024-02-17	2024-02-17	Standard	Eden (WEG)	5	4	0	Yes	Analysis
7	Eden Top Schools 2023 (U13 Mix)	2023-08-19	2023-08-19	Standard	Eden (WEG)	5	5	3	Yes	Analysis
8	Eden Trials 2+3 2023 (U14)	2023-04-15	2023-05-13	Standard	Eden (WEG)	10	4	0	Yes	Analysis
9	Eden Trails 1 2023 (U13 Boys)	2023-03-11	2023-03-11	Standard	Eden (WEG)	5	5	2	Yes	Analysis
10	Kannaland Proewe 1 2023 (U11+U13 Boys)	2023-02-18	2023-02-18	Standard	Eden (WEG)	5	5	3	Yes	Analysis

#	Games	Start				End
1	4	Tournament Eden School Chess Trials 1 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-09	rnd 2	type Standard	result 0.5	date 2024-03-09	rnd 5	type Standard	result 1
		Opponent Matanase, A (Akohlulwa)				Opponent Joseph, W (William)
2	3	Tournament Eden Schools Chess Trials 1 2025				Tournament Eden Top Schools 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Ntselungo, M (Morne)				Opponent Ohlson, K (Keagon)
3	3	Tournament Kannaland Proewe 1 2023				Tournament Kannaland Proewe 1 2023
		date 2023-02-18	rnd 2	type Standard	result 1	date 2023-02-18	rnd 4	type Standard	result 1
		Opponent Pieterse, A (Alwin)				Opponent Pretorius, I (Immanuel)

#	Games	Start				End
1	4	Tournament Eden School Chess Trials 1 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-09	rnd 2	type Standard	result 0.5	date 2024-03-09	rnd 5	type Standard	result 1
		Opponent Matanase, A (Akohlulwa)				Opponent Joseph, W (William)
2	3	Tournament Eden Schools Chess Trials 1 2025				Tournament Eden Top Schools 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Ntselungo, M (Morne)				Opponent Ohlson, K (Keagon)
3	3	Tournament Kannaland Proewe 1 2023				Tournament Kannaland Proewe 1 2023
		date 2023-02-18	rnd 2	type Standard	result 1	date 2023-02-18	rnd 4	type Standard	result 1
		Opponent Pieterse, A (Alwin)				Opponent Pretorius, I (Immanuel)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Eden Schools Chess Trials 1 2025				Tournament Eden Top Schools 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Ntselungo, M (Morne)				Opponent Ohlson, K (Keagon)
2	3	Tournament Eden School Chess Trials 1 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-09	rnd 3	type Standard	result 1	date 2024-03-09	rnd 5	type Standard	result 1
		Opponent Januarie, C (Cedwyn)				Opponent Joseph, W (William)
3	3	Tournament Kannaland Proewe 1 2023				Tournament Kannaland Proewe 1 2023
		date 2023-02-18	rnd 2	type Standard	result 1	date 2023-02-18	rnd 4	type Standard	result 1
		Opponent Pieterse, A (Alwin)				Opponent Pretorius, I (Immanuel)

#	Games	Start				End
1	3	Tournament Eden Schools Chess Trials 1 2025				Tournament Eden Top Schools 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Ntselungo, M (Morne)				Opponent Ohlson, K (Keagon)
2	3	Tournament Eden School Chess Trials 1 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-09	rnd 3	type Standard	result 1	date 2024-03-09	rnd 5	type Standard	result 1
		Opponent Januarie, C (Cedwyn)				Opponent Joseph, W (William)
3	3	Tournament Kannaland Proewe 1 2023				Tournament Kannaland Proewe 1 2023
		date 2023-02-18	rnd 2	type Standard	result 1	date 2023-02-18	rnd 4	type Standard	result 1
		Opponent Pieterse, A (Alwin)				Opponent Pretorius, I (Immanuel)

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	Van Der Berg ,J (Janelle)	3	3	425	3	3	425	0	0	0	0	0	0
1	Van Der Berg ,J (Janelle)	3	1178.5	1603.5	3	1174.4	1603.5	0	0	0	0	0	0
2	Pretorius ,I (Immanuel)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
2	Pretorius ,I (Immanuel)	3	1427.8	1286.1	3	1428.1	1286.1	0	0	0	0	0	0
3	Claassen ,A (Aiden)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Claassen ,A (Aiden)	2	1232.6	807.6	2	1240	807.6	0	0	0	0	0	0
4	Kwabe ,A (Awonke)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Kwabe ,A (Awonke)	1	1331.6	906.6	1	1337.4	906.6	0	0	0	0	0	0
5	Farmer ,P (Perslin)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Farmer ,P (Perslin)	1	1327.7	902.7	1	1320.3	902.7	0	0	0	0	0	0
6	Petersen ,S (Shenwin)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Petersen ,S (Shenwin)	1	1466.4	1041.4	1	1468.1	1041.4	0	0	0	0	0	0
7	Majiet ,C (Clayton)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Majiet ,C (Clayton)	1	1222.2	797.2	1	1200	797.2	0	0	0	0	0	0
8	Schmidt ,U (Ulrich)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Schmidt ,U (Ulrich)	1	1518.7	1093.7	1	1522.8	1093.7	0	0	0	0	0	0
9	Cook ,E (Ethan)	1	1	425	1	1	425	0	0	0	0	0	0
9	Cook ,E (Ethan)	1	1198.6	1623.6	1	1198.4	1623.6	0	0	0	0	0	0
10	Julius ,G (Gio)	1	1	425	1	1	425	0	0	0	0	0	0
10	Julius ,G (Gio)	1	1170.7	1595.7	1	1165.8	1595.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Koopman, J (Juan)

Ratings

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Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms