Chess South Africa Ratings Database

PLAYER PAGE

Personal

Andrews, J (Jerahn)

Chess SA id

1140300853

FIDE id

Date of birth

2014-08-12 (U12)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-18

Personal details last changed

1900-01-01

Junior GPX Games

21.2

Junior GPX Points

1112.2

Item	Main	Standard	Rapid	Blitz
Rating	1273.8	1185.3	1303	1200
Raw rating	1273.8	1185.3	1303	1200
Weighted rating	1188.7	1183.4	1196.7	1200
Weighted performance	1231	0	1291.7	0
Floor	773.8	700	810.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	149.3	169.3	143.2	165.8
Highest rating	1273.8 2025-11-01	1200 2024-04-01	1310.2 2025-09-01	1200 2024-04-01
Highest raw rating	1273.8 2025-11-01	1200 2024-04-01	1310.2 2025-09-01	1200 2024-04-01
Highest weighted rating	1200 2024-11-01	1200 2024-04-01	1200 2024-11-01	1200 2024-04-01
Highest weighted performance	1239.1 2025-09-01	1200 2024-04-01	1291.7 2025-11-01	1200 2024-04-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1273.8	1185.3	1303	1200
Analysis
Rating	1273.8	1185.3	1303	1200
Raw rating	1273.8	1185.3	1303	1200
Weighted rating	1188.7	1183.4	1196.7
Weighted performance	1231	0	1291.7
K-factor	36	36	36	36
Floor	773.8	700	810.2	700
Max/Min rating change allowed	149.3	169.3	143.2	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	1273.8	1185.3	1303	1200
New weighted rating	1195.9	1183.3	1206.1	1200
New weighted performance	1223.7	0	1284.1	0
Temp new rating	1273.8	1185.3	1303	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1273.8	1185.3	1303	1200
New K-factor	36	36	36	36
New floor	773.8	700	810.2	700

Item	Main	Standard	Rapid
	0	0	0
	37	5	32
	15	5	10
	0	0	0
	0	0	0
	0	0	0
History	52	10	42

Games since
	Main 52	Standard 10		Rapid 42		Blitz 0
Gender	Male
Age group	U12
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	3508		1155		160
Male	2706		848		114
U12	542		185		32
U12 Male	381		122		21
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	1048		529		89
Male	855		426		66
U12	179		101		26
U12 Male	131		70		17
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	37	19	51.35	11.5	1286.6	1298.1
Standard	5	2	40	-85	1215.2	1130.2
Rapid	32	17	53.12	26.6	1297.7	1324.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	52	24	46.15	-32.7	1267.4	1234.7
Standard	10	3.5	35	-127.5	1231.8	1104.3
Rapid	42	20.5	48.81	-10.1	1275.8	1265.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1273.8	1185.3	1303	1200
2025-09-30	1256.4	1185.3	1310.2	1200
2025-09-01	1256.4	1185.3	1310.2	1200
2025-08-01	1171.1	1185.3	1168.6	1200
2025-07-01	1171.1	1185.3	1168.6	1200
2025-06-01	1171.1	1185.3	1168.6	1200
2025-05-01	1171.1	1185.3	1168.6	1200
2025-04-01	1171.1	1185.3	1168.6	1200
2025-03-01	1171.1	1184.7	1168.6	1200
2025-02-01	1170.9	1184.9	1168	1200
2025-01-01	1147.8	1164.8	1148.8	1200
2024-12-01	1147.8	1164.8	1148.8	1200
2024-11-01	1147.8	1164.8	1148.8	1200
2024-10-01	1147.8	1164.8	1148.8	1200
2024-09-01	1147.8	1164.8	1148.8	1200
2024-08-01	1166.4	1200	1148.8	1200
2024-07-01	1166.4	1200	1148.8	1200
2024-09-01	1166.4	1200	1148.8	1200
2024-05-01	1189.9	1200	1187.2	1200
2024-04-01	1189.9	1200	1187.2	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	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	Worcester Schools Knock-Out 2025 (U11 Boys)	2025-10-18	2025-10-18	Rapid	Cape Winelands (WCW)	6	6	3.5	Yes	Analysis
2	Langeberg Club 2025 (U12)	2025-10-04	2025-10-04	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
3	Kleinmond Chess Club Open 2025 (U12)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
4	Cape Winelands Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	4	2	Yes	Analysis
5	De Villiers PS 2025 (U12 Boys)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
6	Cape Winelands Schools Development 2025 (U11 Boys)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
7	Cape Winelands Schools - Trials 1 2025 (U11 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Worcester Schools Knock-Out 2025 (U11 Boys)	2025-10-18	2025-10-18	Rapid	Cape Winelands (WCW)	6	6	3.5	Yes	Analysis
2	Langeberg Club 2025 (U12)	2025-10-04	2025-10-04	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
3	Kleinmond Chess Club Open 2025 (U12)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
4	Cape Winelands Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	4	2	Yes	Analysis
5	De Villiers PS 2025 (U12 Boys)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
6	Cape Winelands Schools Development 2025 (U11 Boys)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
7	Cape Winelands Schools - Trials 1 2025 (U11 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
8	De Villiers PS Tournament 2024 (U14)	2024-08-17	2024-08-17	Standard	Cape Winelands (WCW)	5	5	1.5	Yes	Analysis
9	Robertson Strategema Chess May 2024 (U11)	2024-05-11	2024-05-11	Rapid	Cape Winelands (WCW)	5	4	1	Yes	Analysis
10	Brave Knights 2024 (U9)	2024-03-16	2024-03-16	Rapid	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis

#	Games	Start				End
1	3	Tournament Worcester Schools Knock-Out 2025				Tournament Worcester Schools Knock-Out 2025
		date 2025-10-18	rnd 4	type Rapid	result 1	date 2025-10-18	rnd 6	type Rapid	result 1
		Opponent Cloete, D (Devandre)				Opponent Abrahams, J (Johagen)
2	3	Tournament Langeberg Club 2025				Tournament Langeberg Club 2025
		date 2025-10-04	rnd 2	type Rapid	result 1	date 2025-10-04	rnd 4	type Rapid	result 1
		Opponent Du Toit, S (Shaundre)				Opponent Fortuin, P (Pearl)
3	3	Tournament Cape Winelands Top Schools 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 5	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Simons, J (Jefflin)				Opponent Henning, N (Nicolas)

#	Games	Start				End
1	2	Tournament De Villiers PS Tournament 2024				Tournament De Villiers PS Tournament 2024
		date 2024-08-17	rnd 3	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 0.5
		Opponent Silie, J (Jade-Dine)				Opponent Prinsloo, E (Elzaan)
2	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 5	type Standard	result 1	date 2025-02-22	rnd 5	type Standard	result 1
		Opponent Flaum, S (Stefan)				Opponent Flaum, S (Stefan)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 2	type Standard	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Fredericks, S (Stef-Lee Elton)				Opponent Fredericks, S (Stef-Lee Elton)

#	Games	Start				End
1	3	Tournament Cape Winelands Top Schools 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 5	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Simons, J (Jefflin)				Opponent Henning, N (Nicolas)
2	3	Tournament Cape Winelands Schools Development 2025				Tournament Cape Winelands Schools Development 2025
		date 2025-08-02	rnd 2	type Rapid	result 1	date 2025-08-02	rnd 4	type Rapid	result 1
		Opponent Jansen, N (Nico)				Opponent Adams, L (Leighton)
3	3	Tournament Brave Knights 2024				Tournament Brave Knights 2024
		date 2024-03-16	rnd 2	type Rapid	result 1	date 2024-03-16	rnd 4	type Rapid	result 1
		Opponent Coetzee, A (Abraham)				Opponent Krotz, M (Maya)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Cape Winelands Top Schools 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 5	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Simons, J (Jefflin)				Opponent Henning, N (Nicolas)
2	3	Tournament Cape Winelands Schools Development 2025				Tournament Cape Winelands Schools Development 2025
		date 2025-08-02	rnd 2	type Rapid	result 1	date 2025-08-02	rnd 4	type Rapid	result 1
		Opponent Jansen, N (Nico)				Opponent Adams, L (Leighton)
3	2	Tournament De Villiers PS 2025				Tournament De Villiers PS 2025
		date 2025-08-16	rnd 3	type Rapid	result 1	date 2025-08-16	rnd 4	type Rapid	result 1
		Opponent Coetzee, A (Abraham)				Opponent Pieters, L (Liam)

#	Games	Start				End
1	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 5	type Standard	result 1	date 2025-02-22	rnd 5	type Standard	result 1
		Opponent Flaum, S (Stefan)				Opponent Flaum, S (Stefan)
2	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 2	type Standard	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Fredericks, S (Stef-Lee Elton)				Opponent Fredericks, S (Stef-Lee Elton)
3	1	Tournament De Villiers PS Tournament 2024				Tournament De Villiers PS Tournament 2024
		date 2024-08-17	rnd 3	type Standard	result 1	date 2024-08-17	rnd 3	type Standard	result 1
		Opponent Silie, J (Jade-Dine)				Opponent Silie, J (Jade-Dine)

#	Games	Start				End
1	3	Tournament Cape Winelands Top Schools 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 5	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Simons, J (Jefflin)				Opponent Henning, N (Nicolas)
2	3	Tournament Cape Winelands Schools Development 2025				Tournament Cape Winelands Schools Development 2025
		date 2025-08-02	rnd 2	type Rapid	result 1	date 2025-08-02	rnd 4	type Rapid	result 1
		Opponent Jansen, N (Nico)				Opponent Adams, L (Leighton)
3	2	Tournament De Villiers PS 2025				Tournament De Villiers PS 2025
		date 2025-08-16	rnd 3	type Rapid	result 1	date 2025-08-16	rnd 4	type Rapid	result 1
		Opponent Coetzee, A (Abraham)				Opponent Pieters, L (Liam)

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 Wyk ,M (Micaile)	3	0	-425	0	0	0	3	0	-425	0	0	0
1	Van Wyk ,M (Micaile)	3	1505	1080	0	0	0	3	1583.5	1080	0	0	0
2	Du Toit ,S (Shaundre)	2	1.5	212.5	0	0	0	2	1.5	212.5	0	0	0
2	Du Toit ,S (Shaundre)	2	1191.5	1404	0	0	0	2	1195.9	1404	0	0	0
3	Gomomo ,B (Bandile)	2	2	425	0	0	0	2	2	425	0	0	0
3	Gomomo ,B (Bandile)	2	1207.1	1632.1	0	0	0	2	1207.4	1632.1	0	0	0
4	Louw ,B (Burger)	2	0	-425	0	0	0	2	0	-425	0	0	0
4	Louw ,B (Burger)	2	1292.1	867.1	0	0	0	2	1280.6	867.1	0	0	0
5	Coetzee ,A (Abraham)	2	2	425	0	0	0	2	2	425	0	0	0
5	Coetzee ,A (Abraham)	2	1199.6	1624.6	0	0	0	2	1199.5	1624.6	0	0	0
6	Koert ,D (Dane)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Koert ,D (Dane)	1	1338.2	913.2	1	1326.3	913.2	0	0	0	0	0	0
7	Fredericks ,S (Stef-Lee Elton)	1	1	425	1	1	425	0	0	0	0	0	0
7	Fredericks ,S (Stef-Lee Elton)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Jagers ,Z (Zayd)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Jagers ,Z (Zayd)	1	1200	775	1	1200	775	0	0	0	0	0	0
9	Prinsloo ,E (Elzaan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Prinsloo ,E (Elzaan)	1	1110.7	1110.7	1	1091.2	1110.7	0	0	0	0	0	0
10	Steenkamp ,W (Wentzel)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Steenkamp ,W (Wentzel)	1	1194.8	769.8	0	0	0	1	1169	769.8	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Andrews, J (Jerahn)

Ratings

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Last 24 raw ratings

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Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms