Chess South Africa Ratings Database

PLAYER PAGE

Personal

Perham, B (Bothlale)

Chess SA id

2140327119

FIDE id

Date of birth

2014-07-07 (U14)

Gender

Female

Region

Tshwane (GTP)

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

Item	Main	Standard	Rapid	Blitz
Rating	1187.9	1185.9	1200	1200
Raw rating	1147.5	1138.8	1200	1200
Weighted rating	1187.9	1185.9	1200	1200
Weighted performance	0	0	0	0
Floor	699	699	700	700
K-factor	40	40	40	40
Min/Max rating change allowed	178.7	180.9	165.8	165.8
Highest rating	1199 2025-09-06	1199 2025-09-06	1199 2025-09-06	1199 2025-09-06
Highest raw rating	1199 2025-09-06	1199 2025-09-06	1199 2025-09-06	1199 2025-09-06
Highest weighted rating	1195.8 2025-11-01	1195.1 2025-11-01	0 2025-09-06	0 2025-09-06
Highest weighted performance	0 2025-09-06	0 2025-09-06	0 2025-09-06	0 2025-09-06

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-3.7	-4.3	0	0
New rating	1184.3	1181.6	1200	1200
Analysis
Rating	1187.9	1185.9	1200	1200
Raw rating	1147.5	1138.8	1200	1200
Weighted rating	1187.9	1185.9	1200
Weighted performance	0	0	0
K-factor	40	40	40	40
Floor	699	699	700	700
Max/Min rating change allowed	178.7	180.9	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	1147.5	1138.8	1200	1200
New weighted rating	1184.3	1181.6	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1184.3	1181.6	1200	1200
Temp new rating +/-	-3.7	-4.3	0	0
Final new rating +/-	-3.7	-4.3	0	0
New rating	1184.3	1181.6	1200	1200
New K-factor	40	40	36	36
New floor	699	699	700	700

Item	Main	Standard
	0	0
	10	10
	0	0
	0	0
	0	0
	0	0
History	10	10

Games since
	Main 10	Standard 10		Rapid 0		Blitz 0
Gender	F
Age group	U12
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
F	-1		-1		-1
U12	-1		-1		-1
U12 F	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
F	-1		-1		-1
U12	-1		-1		-1
U12 F	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
F	-1		-1		-1
U12	-1		-1		-1
U12 F	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
F	-1		-1		-1
U12	-1		-1		-1
U12 F	-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	3	30	-170	1229.3	1059.3
Standard	10	3	30	-170	1229.3	1059.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	10	3	30	-170	1229.3	1059.3
Standard	10	3	30	-170	1229.3	1059.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1147.5	1138.8	1200	1200
2025-11-30	1147.5	1138.8	1200	1200
2025-11-01	1147.5	1138.8	1200	1200
2025-09-30	1200	1200	1200	1200
2025-09-01	1200	1200	1200	1200
2025-08-01	1200	1200	1200	1200
2025-07-01	1200	1200	1200	1200
2025-06-01	1200	1200	1200	1200
2025-05-01	1200	1200	1200	1200
2025-04-01	1200	1200	1200	1200
2025-03-01	1200	1200	1200	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	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

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	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	1	Yes	Analysis
2	2025 Gauteng Schools Provincial Individual Chess Championship (U11 Girls)	2025-09-27	2025-09-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis

#	Games	Start				End
1	2	Tournament 2025 Gauteng Top Schools Teams				Tournament 2025 Gauteng Top Schools Teams
		date 2025-08-29	rnd 1	type Standard	result 0.5	date 2025-08-29	rnd 2	type Standard	result 0.5
		Opponent Letsoalo, N (Nqobile)				Opponent Hoffman, T (Trishana)
2	1	Tournament 2025 Gauteng Schools Provincial Individual Chess Championship				Tournament 2025 Gauteng Schools Provincial Individual Chess Championship
		date 2025-09-27	rnd 3	type Standard	result 1	date 2025-09-27	rnd 3	type Standard	result 1
		Opponent Mandela, C (Caroline)				Opponent Mandela, C (Caroline)
3	1	Tournament 2025 Gauteng Schools Provincial Individual Chess Championship				Tournament 2025 Gauteng Schools Provincial Individual Chess Championship
		date 2025-09-27	rnd 1	type Standard	result 1	date 2025-09-27	rnd 1	type Standard	result 1
		Opponent Olivier, E (Enika)				Opponent Olivier, E (Enika)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

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	Olivier ,E (Enika)	1	1	425	1	1	425	0	0	0	0	0	0
1	Olivier ,E (Enika)	1	1235.6	1660.6	1	1238.9	1660.6	0	0	0	0	0	0
2	Scott ,B (Bailey)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Scott ,B (Bailey)	1	1191.5	766.5	1	1189.2	766.5	0	0	0	0	0	0
3	Hoffman ,T (Trishana)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
3	Hoffman ,T (Trishana)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
4	Letsoalo ,N (Nqobile)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
4	Letsoalo ,N (Nqobile)	1	1215	1215	1	1218.3	1215	0	0	0	0	0	0
5	Kotze ,L (Lia)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Kotze ,L (Lia)	1	1304.5	879.5	1	1319.2	879.5	0	0	0	0	0	0
6	Bosman ,J (Johanica)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Bosman ,J (Johanica)	1	1235.5	810.5	1	1241.7	810.5	0	0	0	0	0	0
7	Johansson ,Z (Zeeyah)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Johansson ,Z (Zeeyah)	1	1200	775	1	1200	775	0	0	0	0	0	0
8	Van Niekerk ,A (Arike)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Van Niekerk ,A (Arike)	1	1208.7	783.7	1	1201.9	783.7	0	0	0	0	0	0
9	Mandela ,C (Caroline)	1	1	425	1	1	425	0	0	0	0	0	0
9	Mandela ,C (Caroline)	1	1227	1652	1	1236.2	1652	0	0	0	0	0	0
10	Magagula ,T (Thandolwethu)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Magagula ,T (Thandolwethu)	1	1275.7	850.7	1	1290.3	850.7	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

Perham, B (Bothlale)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms