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

2025-08-30

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1122.9

Item	Main	Standard	Rapid	Blitz
Rating	1256.4	1185.3	1310.2	1200
Raw rating	1256.4	1185.3	1310.2	1200
Weighted rating	1181.2	1183.5	1187.1	1200
Weighted performance	1226.7	0	1275.2	0
Floor	756.4	700	810.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	153	169.3	141.7	165.8
Highest rating	1256.4 2025-09-01	1200 2024-04-01	1310.2 2025-09-01	1200 2024-04-01
Highest raw rating	1256.4 2025-09-01	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	1288.1 2025-09-01	1200 2024-04-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1256.4	1185.3	1310.2	1200
Analysis
Rating	1256.4	1185.3	1310.2	1200
Raw rating	1256.4	1185.3	1310.2	1200
Weighted rating	1181.2	1183.5	1187.1
Weighted performance	1226.7	0	1275.2
K-factor	36	36	36	36
Floor	756.4	700	810.2	700
Max/Min rating change allowed	153	169.3	141.7	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	1256.4	1185.3	1310.2	1200
New weighted rating	1187.3	1183.4	1197.3	1200
New weighted performance	1226.3	0	1274.8	0
Temp new rating	1256.4	1185.3	1310.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1256.4	1185.3	1310.2	1200
New K-factor	36	36	36	36
New floor	756.4	700	810.2	700

Item	Main	Standard	Rapid
	0	0	0
	25	5	20
	15	5	10
	0	0	0
	0	0	0
	0	0	0
History	40	10	30

Games since
	Main 40	Standard 10		Rapid 30		Blitz 0
Gender	Male
Age group	U12
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	3572		1174		173
Male	2754		844		118
U12	563		198		34
U12 Male	394		130		23
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	992		512		86
Male	815		412		63
U12	161		97		25
U12 Male	117		69		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	25	12.5	50	0	1288.9	1288.9
Standard	5	2	40	-85	1215.2	1130.2
Rapid	20	10.5	52.5	21.2	1307.3	1328.5
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	40	17.5	43.75	-53.1	1263	1209.9
Standard	10	3.5	35	-127.5	1231.8	1104.3
Rapid	30	14	46.67	-28.3	1273.5	1245.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
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
2024-06-01	1166.4	1200	1148.8	1200
2024-08-01	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
2023-11-01	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	Kleinmond Chess Club Open 2025 (U12)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
2	Cape Winelands Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	4	2	Yes	Analysis
3	De Villiers PS 2025 (U12 Boys)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
4	Cape Winelands Schools Development 2025 (U11 Boys)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
5	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	Kleinmond Chess Club Open 2025 (U12)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	2.5	Yes	Analysis
2	Cape Winelands Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	4	2	Yes	Analysis
3	De Villiers PS 2025 (U12 Boys)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
4	Cape Winelands Schools Development 2025 (U11 Boys)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
5	Cape Winelands Schools - Trials 1 2025 (U11 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
6	De Villiers PS Tournament 2024 (U14)	2024-08-17	2024-08-17	Standard	Cape Winelands (WCW)	5	5	1.5	Yes	Analysis
7	Robertson Strategema Chess May 2024 (U11)	2024-05-11	2024-05-11	Rapid	Cape Winelands (WCW)	5	4	1	Yes	Analysis
8	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 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)

#	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	Louw ,B (Burger)	2	0	-425	0	0	0	2	0	-425	0	0	0
1	Louw ,B (Burger)	2	1292.1	867.1	0	0	0	2	1280.6	867.1	0	0	0
2	Coetzee ,A (Abraham)	2	2	425	0	0	0	2	2	425	0	0	0
2	Coetzee ,A (Abraham)	2	1199.6	1624.6	0	0	0	2	1199.5	1624.6	0	0	0
3	Van Wyk ,M (Micaile)	2	0	-425	0	0	0	2	0	-425	0	0	0
3	Van Wyk ,M (Micaile)	2	1494.5	1069.5	0	0	0	2	1587	1069.5	0	0	0
4	Flaum ,S (Stefan)	1	1	425	1	1	425	0	0	0	0	0	0
4	Flaum ,S (Stefan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Koert ,D (Dane)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Koert ,D (Dane)	1	1338.2	913.2	1	1326.3	913.2	0	0	0	0	0	0
6	Prinsloo ,E (Elzaan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
6	Prinsloo ,E (Elzaan)	1	1110.7	1110.7	1	1091.2	1110.7	0	0	0	0	0	0
7	Small ,W (Wyatt)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Small ,W (Wyatt)	1	1268.3	843.3	1	1232.2	843.3	0	0	0	0	0	0
8	Willers ,S (Stephen)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Willers ,S (Stephen)	1	1207.6	782.6	1	1200	782.6	0	0	0	0	0	0
9	Pieters ,L (Liam)	1	1	425	0	0	0	1	1	425	0	0	0
9	Pieters ,L (Liam)	1	1184.8	1609.8	0	0	0	1	1172.5	1609.8	0	0	0
10	Solitwasji ,L (Lilitha)	1	1	425	0	0	0	1	1	425	0	0	0
10	Solitwasji ,L (Lilitha)	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

Andrews, J (Jerahn)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms