Chess South Africa Ratings Database

PLAYER PAGE

Personal

Bosman, J (Johanica)

Chess SA id

2130303064

FIDE id

Date of birth

2013-11-13 (U14)

Gender

Female

Region

West Rand (GWR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-29

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1350.2

Item	Main	Standard	Rapid	Blitz
Rating	1242.7	1250.3	1200	1200
Raw rating	1242.7	1250.3	1200	1200
Weighted rating	1203.8	1203.1	1200	1200
Weighted performance	0	0	0	0
Floor	742.7	750.3	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	156	154.3	165.8	165.8
Highest rating	1242.7 2025-11-01	1250.3 2025-11-01	1200 2024-06-01	1200 2024-06-01
Highest raw rating	1242.7 2025-11-01	1250.3 2025-11-01	1200 2024-06-01	1200 2024-06-01
Highest weighted rating	1203.8 2025-11-01	1203.1 2025-11-01	1200 2024-06-01	1200 2024-06-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2024-06-01	1200 2024-06-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1242.7	1250.3	1200	1200
Analysis
Rating	1242.7	1250.3	1200	1200
Raw rating	1242.7	1250.3	1200	1200
Weighted rating	1203.8	1203.1	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	742.7	750.3	700	700
Max/Min rating change allowed	156	154.3	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	1242.7	1250.3	1200	1200
New weighted rating	1207.3	1207.3	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1242.7	1250.3	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1242.7	1250.3	1200	1200
New K-factor	36	36	36	36
New floor	742.7	750.3	700	700

Item	Main	Standard
	0	0
	10	10
	5	5
	0	0
	0	0
	0	0
History	15	15

Games since
	Main 15	Standard 15		Rapid 0		Blitz 0
Gender	Female
Age group	U14
Region	West Rand (GWR)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-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	7	70	170	1190.2	1360.2
Standard	10	7	70	170	1190.2	1360.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	15	9	60	85	1197.5	1282.5
Standard	15	9	60	85	1197.5	1282.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1242.7	1250.3	1200	1200
2025-09-30	1235.5	1241.7	1200	1200
2025-09-01	1235.5	1241.7	1200	1200
2025-08-01	1235.5	1241.7	1200	1200
2025-07-01	1191	1187.8	1200	1200
2025-06-01	1191	1187.8	1200	1200
2025-05-01	1191	1187.8	1200	1200
2025-04-01	1191	1187.8	1200	1200
2025-03-01	1191	1187.8	1200	1200
2025-02-01	1190.8	1187.5	1200	1200
2025-01-01	1184.7	1179.2	1200	1200
2024-12-01	1184.7	1179.2	1200	1200
2024-11-01	1184.7	1179.2	1200	1200
2024-10-01	1184.7	1179.2	1200	1200
2024-09-01	1184.7	1179.2	1200	1200
2024-08-01	1184.7	1179.2	1200	1200
2024-07-01	1184.7	1179.2	1200	1200
2024-09-01	1184.7	1179.2	1200	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	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	2025 Gauteng Top Schools Teams (U13 Girls)	2025-08-29	2025-08-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	2025 D2 Schools League Finals (U13 Girls)	2025-07-26	2025-07-26	Standard	West Rand (GWR)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Gauteng Top Schools Teams (U13 Girls)	2025-08-29	2025-08-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	2025 D2 Schools League Finals (U13 Girls)	2025-07-26	2025-07-26	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
3	2024 D2 Schools Individuals (U11 Girls)	2024-05-04	2024-05-04	Standard	West Rand (GWR)	5	5	2	Yes	Analysis

#	Games	Start				End
1	5	Tournament 2024 D2 Schools Individuals				Tournament 2025 D2 Schools League Finals
		date 2024-05-04	rnd 4	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Phosekana, S (Siphesihle)				Opponent Leve, M (Mpho)
2	4	Tournament 2025 D2 Schools League Finals				Tournament 2025 Gauteng Top Schools Teams
		date 2025-07-26	rnd 5	type Standard	result 1	date 2025-08-29	rnd 3	type Standard	result 1
		Opponent Fourie, H (Hailey)				Opponent Perham, B (Bothlale)

#	Games	Start				End
1	5	Tournament 2024 D2 Schools Individuals				Tournament 2025 D2 Schools League Finals
		date 2024-05-04	rnd 4	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Phosekana, S (Siphesihle)				Opponent Leve, M (Mpho)
2	1	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 5	type Standard	result 1	date 2025-07-26	rnd 5	type Standard	result 1
		Opponent Fourie, H (Hailey)				Opponent Fourie, H (Hailey)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament 2024 D2 Schools Individuals				Tournament 2025 D2 Schools League Finals
		date 2024-05-04	rnd 4	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Phosekana, S (Siphesihle)				Opponent Leve, M (Mpho)
2	1	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 5	type Standard	result 1	date 2025-07-26	rnd 5	type Standard	result 1
		Opponent Fourie, H (Hailey)				Opponent Fourie, H (Hailey)

#	Games	Start				End
1	5	Tournament 2024 D2 Schools Individuals				Tournament 2025 D2 Schools League Finals
		date 2024-05-04	rnd 4	type Standard	result 1	date 2025-07-26	rnd 3	type Standard	result 1
		Opponent Phosekana, S (Siphesihle)				Opponent Leve, M (Mpho)
2	1	Tournament 2025 D2 Schools League Finals				Tournament 2025 D2 Schools League Finals
		date 2025-07-26	rnd 5	type Standard	result 1	date 2025-07-26	rnd 5	type Standard	result 1
		Opponent Fourie, H (Hailey)				Opponent Fourie, H (Hailey)

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	Thukutha ,D (Dakalo Makhadzi)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Thukutha ,D (Dakalo Makhadzi)	1	1200	775	1	1200	775	0	0	0	0	0	0
2	Mavuso ,R (Rethabile)	1	1	425	1	1	425	0	0	0	0	0	0
2	Mavuso ,R (Rethabile)	1	1200	1625	1	1199.9	1625	0	0	0	0	0	0
3	Letsoalo ,N (Nqobile)	1	1	425	1	1	425	0	0	0	0	0	0
3	Letsoalo ,N (Nqobile)	1	1215	1640	1	1218.3	1640	0	0	0	0	0	0
4	Perham ,B (Bothlale)	1	1	425	1	1	425	0	0	0	0	0	0
4	Perham ,B (Bothlale)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Lokwe ,S (Simthandile)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Lokwe ,S (Simthandile)	1	1421.3	996.3	1	1416.6	996.3	0	0	0	0	0	0
6	Leve ,M (Mpho)	1	1	425	1	1	425	0	0	0	0	0	0
6	Leve ,M (Mpho)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Botha ,L (Linke Sofi)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Botha ,L (Linke Sofi)	1	1184	759	1	1180.7	759	0	0	0	0	0	0
8	Fourie ,H (Hailey)	1	1	425	1	1	425	0	0	0	0	0	0
8	Fourie ,H (Hailey)	1	1150.7	1575.7	1	1151	1575.7	0	0	0	0	0	0
9	Mapfumo ,T (Tashly)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Mapfumo ,T (Tashly)	1	1065.9	640.9	1	1037.6	640.9	0	0	0	0	0	0
10	Wessels ,A (Amore)	1	1	425	1	1	425	0	0	0	0	0	0
10	Wessels ,A (Amore)	1	1187.2	1612.2	1	1221.3	1612.2	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

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PLAYER PAGE

Personal

Bosman, J (Johanica)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms