Chess South Africa Ratings Database

PLAYER PAGE

Personal

Esterhuizen, JL (Janco)

Chess SA id

111009119

FIDE id

Date of birth

2011-01-19 (U16)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1340.5

Item	Main	Standard	Rapid	Blitz
Rating	1438.6	1439.8	1200	1200
Raw rating	1406.2	1399.1	1200	1200
Weighted rating	1438.6	1439.8	1200	1200
Weighted performance	1193.2	1189.9	0	0
Floor	951.3	956.1	700	700
K-factor	32	32	36	36
Min/Max rating change allowed	123.6	124.9	165.8	165.8
Highest rating	1602.7 2018-08-01	1599.2 2018-08-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1451.3 2022-09-01	1456.1 2022-09-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1439.2 2025-08-01	1441 2025-08-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1602.7 2018-08-01	1599.2 2018-08-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.3	-3	0	0
New rating	1436.3	1436.8	1200	1200
Analysis
Rating	1438.6	1439.8	1200	1200
Raw rating	1406.2	1399.1	1200	1200
Weighted rating	1438.6	1439.8	1200
Weighted performance	1193.2	1189.9	0
K-factor	32	32	36	36
Floor	951.3	956.1	700	700
Max/Min rating change allowed	123.6	124.9	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	1406.2	1399.1	1200	1200
New weighted rating	1436.3	1436.8	1200	1200
New weighted performance	1185.2	1181.9	0	0
Temp new rating	1436.3	1436.8	1200	1200
Temp new rating +/-	-2.3	-3	0	0
Final new rating +/-	-2.3	-3	0	0
New rating	1436.3	1436.8	1200	1200
New K-factor	32	32	36	36
New floor	951.3	956.1	700	700

Item	Main	Standard
	0	0
	5	5
	10	10
	10	10
	25	25
	0	0
History	91	91

Games since
	Main 15	Standard 15		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
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	5	2	40	-85	1266.4	1181.4
Standard	5	2	40	-85	1266.4	1181.4
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	80	49.5	61.87	100.9	1266.8	1367.7
Standard	80	49.5	61.87	100.9	1266.8	1367.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1406.2	1399.1	1200	1200
2025-09-30	1446	1448.4	1200	1200
2025-09-01	1446	1448.4	1200	1200
2025-08-01	1446	1448.4	1200	1200
2025-07-01	1446	1448.4	1200	1200
2025-06-01	1446	1448.4	1200	1200
2025-05-01	1446	1448.4	1200	1200
2025-04-01	1446	1448.4	1200	1200
2025-03-01	1446	1448.4	1200	1200
2025-02-01	1446	1448.4	1200	1200
2025-01-01	1446	1448.4	1200	1200
2024-12-01	1446	1448.4	1200	1200
2024-11-01	1446	1448.4	1200	1200
2024-10-01	1430.6	1429.2	1200	1200
2024-09-01	1426.1	1427	1200	1200
2024-08-01	1426.1	1427	1200	1200
2024-07-01	1426.1	1427	1200	1200
2024-09-01	1426.1	1427	1200	1200
2024-05-01	1426.1	1427	1200	1200
2024-04-01	1426.1	1427	1200	1200
2024-03-01	1426.1	1427	1200	1200
2024-02-01	1426.1	1427	1200	1200
2024-01-01	1426.1	1427	1200	1200
2023-12-01	1426.1	1427	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	2025 Gauteng Schools Provincial Individual Chess Championship (U15 Boys)	2025-09-27	2025-09-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Gauteng Schools Provincial Individual Chess Championship (U15 Boys)	2025-09-27	2025-09-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
2	Gauteng Top Schools 2024 (U13 Open)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
3	Gauteng Schools Individuals Finals 2024 (U13 Boys)	2024-08-16	2024-08-16	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
4	2023 Gauteng Top Schools (U13 Mixed)	2023-08-18	2023-08-18	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
5	Gauteng Schools Individual Finals 2023 (U13 Boys)	2023-05-26	2023-05-26	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
6	JMC 3rd Trials 2022 (B)	2022-09-11	2022-09-11	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
7	2022 Gauteng Schools Team Championships (U11 Open)	2022-08-27	2022-08-27	Standard	Tshwane (GTP)	5	5	5	Yes	Analysis
8	JMC Trials 1 - Laerskool Fontainebleau 2022 (U12)	2022-07-24	2022-07-24	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
9	2022 Gauteng Schools Individual Chess Championship (U11 Boys)	2022-06-18	2022-06-18	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
10	2022 Gauteng Interregion (U12 Open)	2022-02-26	2022-02-26	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
11	JNW Club - Trinityhouse Randpark Ridge Open 2020 (E)	2020-02-22	2020-02-22	Standard	Johannesburg Metro (GJM)	5	5	5	Yes	Analysis
12	JNW Club - Maragon Open 2019 (E)	2019-08-03	2019-08-03	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
13	JNW Club - Helpmekaar Kollege Open 2019 (E)	2019-07-06	2019-07-06	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
14	JHB Metro Closed 2019 (U10)	2019-07-27	2019-07-28	Standard	Johannesburg Metro (GJM)	6	6	2	Yes	Analysis
15	JNW Club - Hoerskool Linden 2019 (D)	2019-06-15	2019-06-15	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
16	2018 Gauteng League Final (U9)	2018-08-24	2018-08-24	Standard	Tshwane (GTP)	5	4	4	Yes	Analysis

#	Games	Start				End
1	8	Tournament JNW Club - Maragon Open 2019				Tournament 2022 Gauteng Interregion
		date 2019-08-03	rnd 5	type Standard	result 1	date 2022-02-26	rnd 2	type Standard	result 1
		Opponent Weng, Y (Yu Bo (David))				Opponent Mupalala, K (Kenzo)
2	6	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-27	rnd 1	type Standard	result 1	date 2022-09-11	rnd 1	type Standard	result 1
		Opponent Molefe, O (Obakeng)				Opponent Segal, J (Jamie)
3	4	Tournament 2022 Gauteng Schools Individual Chess Championship				Tournament 2022 Gauteng Schools Individual Chess Championship
		date 2022-06-18	rnd 1	type Standard	result 1	date 2022-06-18	rnd 4	type Standard	result 1
		Opponent Kganya, P (Pule)				Opponent Gondwe, P (Prosper)

#	Games	Start				End
1	8	Tournament JNW Club - Maragon Open 2019				Tournament 2022 Gauteng Interregion
		date 2019-08-03	rnd 5	type Standard	result 1	date 2022-02-26	rnd 2	type Standard	result 1
		Opponent Weng, Y (Yu Bo (David))				Opponent Mupalala, K (Kenzo)
2	6	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-27	rnd 1	type Standard	result 1	date 2022-09-11	rnd 1	type Standard	result 1
		Opponent Molefe, O (Obakeng)				Opponent Segal, J (Jamie)
3	4	Tournament 2022 Gauteng Schools Individual Chess Championship				Tournament 2022 Gauteng Schools Individual Chess Championship
		date 2022-06-18	rnd 1	type Standard	result 1	date 2022-06-18	rnd 4	type Standard	result 1
		Opponent Kganya, P (Pule)				Opponent Gondwe, P (Prosper)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament JNW Club - Maragon Open 2019				Tournament 2022 Gauteng Interregion
		date 2019-08-03	rnd 5	type Standard	result 1	date 2022-02-26	rnd 2	type Standard	result 1
		Opponent Weng, Y (Yu Bo (David))				Opponent Mupalala, K (Kenzo)
2	6	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-27	rnd 1	type Standard	result 1	date 2022-09-11	rnd 1	type Standard	result 1
		Opponent Molefe, O (Obakeng)				Opponent Segal, J (Jamie)
3	4	Tournament 2022 Gauteng Schools Individual Chess Championship				Tournament 2022 Gauteng Schools Individual Chess Championship
		date 2022-06-18	rnd 1	type Standard	result 1	date 2022-06-18	rnd 4	type Standard	result 1
		Opponent Kganya, P (Pule)				Opponent Gondwe, P (Prosper)

#	Games	Start				End
1	8	Tournament JNW Club - Maragon Open 2019				Tournament 2022 Gauteng Interregion
		date 2019-08-03	rnd 5	type Standard	result 1	date 2022-02-26	rnd 2	type Standard	result 1
		Opponent Weng, Y (Yu Bo (David))				Opponent Mupalala, K (Kenzo)
2	6	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-27	rnd 1	type Standard	result 1	date 2022-09-11	rnd 1	type Standard	result 1
		Opponent Molefe, O (Obakeng)				Opponent Segal, J (Jamie)
3	4	Tournament 2022 Gauteng Schools Individual Chess Championship				Tournament 2022 Gauteng Schools Individual Chess Championship
		date 2022-06-18	rnd 1	type Standard	result 1	date 2022-06-18	rnd 4	type Standard	result 1
		Opponent Kganya, P (Pule)				Opponent Gondwe, P (Prosper)

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	Botha ,JCC (Johannes Christiaan Corneli)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Botha ,JCC (Johannes Christiaan Corneli)	3	1576.2	1434.5	3	1571.6	1434.5	0	0	0	0	0	0
2	Moonsammy ,E (Ethan)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Moonsammy ,E (Ethan)	2	1423.1	998.1	2	1393.6	998.1	0	0	0	0	0	0
3	Rademeyer ,L (Luca)	2	1	0	2	1	0	0	0	0	0	0	0
3	Rademeyer ,L (Luca)	2	1322.9	1322.9	2	1311.1	1322.9	0	0	0	0	0	0
4	Segal ,J (Jamie)	2	1	0	2	1	0	0	0	0	0	0	0
4	Segal ,J (Jamie)	2	1365.4	1365.4	2	1403.2	1365.4	0	0	0	0	0	0
5	Mupalala ,K (Kenzo)	2	1	0	2	1	0	0	0	0	0	0	0
5	Mupalala ,K (Kenzo)	2	1358.4	1358.4	2	1344.9	1358.4	0	0	0	0	0	0
6	Du Toit ,B (Bernard)	2	2	425	2	2	425	0	0	0	0	0	0
6	Du Toit ,B (Bernard)	2	1282.3	1707.3	2	1291.7	1707.3	0	0	0	0	0	0
7	Bennie ,J (Johannes)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Bennie ,J (Johannes)	2	1322.5	897.5	2	1306.1	897.5	0	0	0	0	0	0
8	Kayiya ,A (Anashe)	2	2	425	2	2	425	0	0	0	0	0	0
8	Kayiya ,A (Anashe)	2	1070.1	1495.1	2	1050.6	1495.1	0	0	0	0	0	0
9	Steyn ,A (Anneke)	1	1	425	1	1	425	0	0	0	0	0	0
9	Steyn ,A (Anneke)	1	1291.2	1716.2	1	1274	1716.2	0	0	0	0	0	0
10	Mungal ,E (Ethan)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Mungal ,E (Ethan)	1	1278.2	853.2	1	1292	853.2	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

Esterhuizen, JL (Janco)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms