Chess South Africa Ratings Database

PLAYER PAGE

Personal

Johnson, J (Jerolin)

Chess SA id

1080147904

FIDE id

Date of birth

2008-01-23 (U18)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-30

Personal details last changed

1900-01-01

Junior GPX Games

20.2

Junior GPX Points

1116.4

Item	Main	Standard	Rapid	Blitz
Rating	1262.3	1227.2	1272.3	1200
Raw rating	1262.3	1227.2	1272.3	1200
Weighted rating	1210.1	1201.9	1190.7	1200
Weighted performance	1253	0	1228	0
Floor	768.6	727.2	772.3	700
K-factor	36	36	36	36
Min/Max rating change allowed	151.7	159.5	149.6	165.8
Highest rating	1268.6 2024-06-01	1268.5 2024-05-01	1289 2022-12-01	1200 2018-10-01
Highest raw rating	1268.6 2024-06-01	1227.2 2025-09-30	1272.3 2025-07-01	1200 2024-02-01
Highest weighted rating	1268.6 2018-10-01	1224.7 2018-10-01	1272.3 2024-07-01	1200 2018-10-01
Highest weighted performance	1264.4 2025-07-01	1268.5 2024-05-01	1289 2022-12-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1262.3	1227.2	1272.3	1200
Analysis
Rating	1262.3	1227.2	1272.3	1200
Raw rating	1262.3	1227.2	1272.3	1200
Weighted rating	1210.1	1201.9	1190.7
Weighted performance	1253	0	1228
K-factor	36	36	36	36
Floor	768.6	727.2	772.3	700
Max/Min rating change allowed	151.7	159.5	149.6	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	1262.3	1227.2	1272.3	1200
New weighted rating	1215.5	1206	1197.4	1200
New weighted performance	1252.6	0	1227.5	0
Temp new rating	1262.3	1227.2	1272.3	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1262.3	1227.2	1272.3	1200
New K-factor	36	36	36	36
New floor	768.6	727.2	772.3	700

Item	Main	Standard	Rapid
	0	0	0
	26	11	15
	28	5	23
	0	0	0
	11	6	5
	0	0	0
History	65	22	43

Games since
	Main 54	Standard 16		Rapid 38		Blitz 0
Gender	Male
Age group	U18
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	3506		1150		121
Male	2717		831		86
U18	529		161		24
U18 Male	435		122		21
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	1189		609		142
Male	962		478		104
U18	148		77		30
U18 Male	133		66		27
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	26	15	57.69	65.4	1248.6	1314
Standard	11	5.5	50	0	1281.6	1281.6
Rapid	15	9.5	63.33	113.3	1224.4	1337.7
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	65	27	41.54	-71.9	1262.6	1190.6
Standard	22	9.5	43.18	-58	1296	1238
Rapid	43	17.5	40.7	-79.1	1245.5	1166.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1262.3	1227.2	1272.3	1200
2025-09-01	1264.4	1224.7	1272.3	1200
2025-08-01	1264.4	1224.7	1272.3	1200
2025-07-01	1264.4	1224.7	1272.3	1200
2025-06-01	1236	1224.7	1214.7	1200
2025-05-01	1178.5	1204.8	1163.3	1200
2025-04-01	1177.8	1204.8	1163.3	1200
2025-03-01	1176.9	1204.8	1163.3	1200
2025-02-01	1174.9	1204.8	1158.1	1200
2025-01-01	1158.6	1204.8	1071.9	1200
2024-12-01	1158.6	1204.8	1071.9	1200
2024-11-01	1174.5	1204.8	1085.6	1200
2024-10-01	1174.5	1204.8	1085.6	1200
2024-09-01	1216.8	1204.8	1136	1200
2024-08-01	1216.8	1204.8	1136	1200
2024-07-01	1268.6	1204.8	1222	1200
2024-06-01	1268.6	1204.8	1222	1200
2024-08-01	1145.8	1093.6	1221.6	1200
2024-04-01	1145.8	1093.6	1221.6	1200
2024-03-01	1145.8	1093.6	1221.6	1200
2024-02-01	1145.8	1093.6	1221.6	1200
2024-01-01	1145.8	1093.6	1221.6	1200
2023-12-01	1145.8	1093.6	1221.6	1200
2023-11-01	1145.8	1093.6	1221.6	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	Rooibos Open 2025 (Intermediate)	2025-08-30	2025-08-30	Standard	West Coast (WCU)	5	5	2.5	Yes	Analysis
2	Shakirah Ruiters Youth Tournament 2025 (Advanced)	2025-06-16	2025-06-16	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
3	Brenton Cupido West Coast Development Championship 2025 (U17 Boys)	2025-05-24	2025-05-24	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
4	West Coast And Mykonos Open 2025 (Advanced)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
5	Upper West Coast Presrige 2025 (U17 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Rooibos Open 2025 (Intermediate)	2025-08-30	2025-08-30	Standard	West Coast (WCU)	5	5	2.5	Yes	Analysis
2	Shakirah Ruiters Youth Tournament 2025 (Advanced)	2025-06-16	2025-06-16	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
3	Brenton Cupido West Coast Development Championship 2025 (U17 Boys)	2025-05-24	2025-05-24	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
4	West Coast And Mykonos Open 2025 (Advanced)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
5	Upper West Coast Presrige 2025 (U17 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
6	West Coast Grand Challange League 2024 (HS Champions)	2024-10-26	2024-10-26	Rapid	West Coast (WCU)	5	5	1	Yes	Analysis
7	The Rooibos Open 2024 (Elite)	2024-08-24	2024-08-24	Rapid	West Coast (WCU)	5	4	0	Yes	Analysis
8	Vredendal North CC Open 2024 (Elite)	2024-07-27	2024-07-27	Rapid	West Coast (WCU)	5	5	0	Yes	Analysis
9	Bo-Weskus Skole Skaak Top Skole 2024 (O18)	2024-05-11	2024-05-11	Rapid	West Coast (WCU)	5	5	1	Yes	Analysis
10	West Coast & Mykonos Open 2024 (Open)	2024-05-17	2024-05-19	Standard	West Coast (WCU)	6	5	4	Yes	Analysis
11	Lambersbaai Open 2024 (A)	2024-05-01	2024-05-01	Rapid	West Coast (WCU)	5	4	3	Yes	Analysis
12	Clanwilliam Open 2022 (C)	2022-12-10	2022-12-10	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
13	West Coast Open 2022 (Open)	2022-11-05	2022-11-05	Standard	West Coast (WCU)	6	6	0	Yes	Analysis

#	Games	Start				End
1	6	Tournament Brenton Cupido West Coast Development Championship 2025				Tournament Shakirah Ruiters Youth Tournament 2025
		date 2025-05-24	rnd 2	type Rapid	result 1	date 2025-06-16	rnd 2	type Rapid	result 1
		Opponent Collison, S (Shardrake)				Opponent Jacobs, A (Apoleam)
2	4	Tournament Shakirah Ruiters Youth Tournament 2025				Tournament Rooibos Open 2025
		date 2025-06-16	rnd 4	type Rapid	result 1	date 2025-08-30	rnd 2	type Standard	result 1
		Opponent Titus, M (Michael John)				Opponent Varadharajan, E (Elavarasan)
3	4	Tournament West Coast & Mykonos Open 2024				Tournament West Coast & Mykonos Open 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-19	rnd 6	type Standard	result 1
		Opponent Salomo, C (Cohen)				Opponent Arendse, Q (Quinwinne)

#	Games	Start				End
1	4	Tournament West Coast And Mykonos Open 2025				Tournament Rooibos Open 2025
		date 2025-05-04	rnd 5	type Standard	result 1	date 2025-08-30	rnd 2	type Standard	result 1
		Opponent Salomo, C (Cohen)				Opponent Varadharajan, E (Elavarasan)
2	4	Tournament West Coast & Mykonos Open 2024				Tournament West Coast & Mykonos Open 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-19	rnd 6	type Standard	result 1
		Opponent Salomo, C (Cohen)				Opponent Arendse, Q (Quinwinne)
3	1	Tournament Rooibos Open 2025				Tournament Rooibos Open 2025
		date 2025-08-30	rnd 4	type Standard	result 0.5	date 2025-08-30	rnd 4	type Standard	result 0.5
		Opponent Seas, A (Ava-Gee)				Opponent Seas, A (Ava-Gee)

#	Games	Start				End
1	6	Tournament Brenton Cupido West Coast Development Championship 2025				Tournament Shakirah Ruiters Youth Tournament 2025
		date 2025-05-24	rnd 2	type Rapid	result 1	date 2025-06-16	rnd 2	type Rapid	result 1
		Opponent Collison, S (Shardrake)				Opponent Jacobs, A (Apoleam)
2	4	Tournament Clanwilliam Open 2022				Tournament Lambersbaai Open 2024
		date 2022-12-10	rnd 3	type Rapid	result 1	date 2024-05-01	rnd 2	type Rapid	result 1
		Opponent Swarts, C (Caleb)				Opponent Kamfer, J (Johnlin)
3	2	Tournament Shakirah Ruiters Youth Tournament 2025				Tournament Shakirah Ruiters Youth Tournament 2025
		date 2025-06-16	rnd 4	type Rapid	result 1	date 2025-06-16	rnd 5	type Rapid	result 1
		Opponent Titus, M (Michael John)				Opponent Roman, F (Fernando)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Shakirah Ruiters Youth Tournament 2025				Tournament Rooibos Open 2025
		date 2025-06-16	rnd 4	type Rapid	result 1	date 2025-08-30	rnd 2	type Standard	result 1
		Opponent Titus, M (Michael John)				Opponent Varadharajan, E (Elavarasan)
2	4	Tournament West Coast & Mykonos Open 2024				Tournament West Coast & Mykonos Open 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-19	rnd 6	type Standard	result 1
		Opponent Salomo, C (Cohen)				Opponent Arendse, Q (Quinwinne)
3	4	Tournament Clanwilliam Open 2022				Tournament Lambersbaai Open 2024
		date 2022-12-10	rnd 3	type Rapid	result 1	date 2024-05-01	rnd 2	type Rapid	result 1
		Opponent Swarts, C (Caleb)				Opponent Kamfer, J (Johnlin)

#	Games	Start				End
1	4	Tournament West Coast And Mykonos Open 2025				Tournament Rooibos Open 2025
		date 2025-05-04	rnd 5	type Standard	result 1	date 2025-08-30	rnd 2	type Standard	result 1
		Opponent Salomo, C (Cohen)				Opponent Varadharajan, E (Elavarasan)
2	4	Tournament West Coast & Mykonos Open 2024				Tournament West Coast & Mykonos Open 2024
		date 2024-05-18	rnd 3	type Standard	result 1	date 2024-05-19	rnd 6	type Standard	result 1
		Opponent Salomo, C (Cohen)				Opponent Arendse, Q (Quinwinne)
3	1	Tournament West Coast And Mykonos Open 2025				Tournament West Coast And Mykonos Open 2025
		date 2025-05-03	rnd 2	type Standard	result 1	date 2025-05-03	rnd 2	type Standard	result 1
		Opponent Bell, N (Neyo)				Opponent Bell, N (Neyo)

#	Games	Start				End
1	4	Tournament Clanwilliam Open 2022				Tournament Lambersbaai Open 2024
		date 2022-12-10	rnd 3	type Rapid	result 1	date 2024-05-01	rnd 2	type Rapid	result 1
		Opponent Swarts, C (Caleb)				Opponent Kamfer, J (Johnlin)
2	3	Tournament Brenton Cupido West Coast Development Championship 2025				Tournament Shakirah Ruiters Youth Tournament 2025
		date 2025-05-24	rnd 5	type Rapid	result 1	date 2025-06-16	rnd 2	type Rapid	result 1
		Opponent Van Rooi, C (Curtley)				Opponent Jacobs, A (Apoleam)
3	2	Tournament Shakirah Ruiters Youth Tournament 2025				Tournament Shakirah Ruiters Youth Tournament 2025
		date 2025-06-16	rnd 4	type Rapid	result 1	date 2025-06-16	rnd 5	type Rapid	result 1
		Opponent Titus, M (Michael John)				Opponent Roman, F (Fernando)

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	Salomo ,C (Cohen)	2	2	425	2	2	425	0	0	0	0	0	0
1	Salomo ,C (Cohen)	2	1174.2	1599.2	2	1180.6	1599.2	0	0	0	0	0	0
2	Arendse ,Q (Quinwinne)	2	1	0	2	1	0	0	0	0	0	0	0
2	Arendse ,Q (Quinwinne)	2	1432	1432	2	1413.9	1432	0	0	0	0	0	0
3	Ellman ,A (Anne-Belle)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Ellman ,A (Anne-Belle)	2	1412	987	2	1381.7	987	0	0	0	0	0	0
4	Van Wyk ,E (Ebrahim)	2	0	-425	0	0	0	2	0	-425	0	0	0
4	Van Wyk ,E (Ebrahim)	2	1214.6	789.6	0	0	0	2	1219.8	789.6	0	0	0
5	Ellman ,A (Andries)	2	1	0	0	0	0	2	1	0	0	0	0
5	Ellman ,A (Andries)	2	1178.9	1178.9	0	0	0	2	1239.4	1178.9	0	0	0
6	Van Rooyen ,S (Sergio)	2	0	-425	0	0	0	2	0	-425	0	0	0
6	Van Rooyen ,S (Sergio)	2	1247.2	822.2	0	0	0	2	1204.3	822.2	0	0	0
7	Seas ,A (Ava-Gee)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
7	Seas ,A (Ava-Gee)	1	1144.9	1144.9	1	1103.9	1144.9	0	0	0	0	0	0
8	Wilson ,J (Joshua)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Wilson ,J (Joshua)	1	1194.4	769.4	1	1159.6	769.4	0	0	0	0	0	0
9	Bell ,N (Neyo)	1	1	425	1	1	425	0	0	0	0	0	0
9	Bell ,N (Neyo)	1	1300.9	1725.9	1	1231.3	1725.9	0	0	0	0	0	0
10	Gentles ,A (Abrian)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Gentles ,A (Abrian)	1	1313.8	888.8	1	1260.1	888.8	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

Johnson, J (Jerolin)

Ratings

Game statistics

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms