Chess South Africa Ratings Database

PLAYER PAGE

Personal

Cosa, L (Lonwaba)

Chess SA id

1100156864

FIDE id

Date of birth

2010-02-06 (U16)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-05-11

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1210.2	1200	1218	1200
Raw rating	1210.2	1200	1218	1200
Weighted rating	1210.1	1200	1217.6	1200
Weighted performance	0	0	0	0
Floor	710.2	700	718	700
K-factor	36	36	36	36
Min/Max rating change allowed	163.4	165.8	161.6	165.8
Highest rating	1210.2 2024-06-01	1200 2018-10-01	1264.8 2023-05-01	1200 2018-10-01
Highest raw rating	1210.2 2024-06-01	1200 2024-02-01	1218 2024-06-01	1200 2024-02-01
Highest weighted rating	1210.1 2025-08-01	1200 2018-10-01	1217.4 2025-08-01	1200 2018-10-01
Highest weighted performance	1208.6 2023-05-01	1200 2024-02-01	1264.8 2023-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1210.2	1200	1218	1200
Analysis
Rating	1210.2	1200	1218	1200
Raw rating	1210.2	1200	1218	1200
Weighted rating	1210.1	1200	1217.6
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	710.2	700	718	700
Max/Min rating change allowed	163.4	165.8	161.6	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	1210.2	1200	1218	1200
New weighted rating	1210.1	1200	1217.7	1200
New weighted performance	0	0	0	0
Temp new rating	1210.2	1200	1218	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1210.2	1200	1218	1200
New K-factor	36	36	36	36
New floor	710.2	700	718	700

Item	Main	Rapid
	0	0
	0	0
	4	4
	5	5
	0	0
	0	0
History	9	9

Games since
	Main 4	Standard 0		Rapid 4		Blitz 0
Gender	Male
Age group	U16
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	9	5	55.56	47.2	1197.2	1244.4
Standard	0	0	0	0	0	0
Rapid	9	5	55.56	47.2	1197.2	1244.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1210.2	1200	1218	1200
2025-09-01	1210.2	1200	1218	1200
2025-08-01	1210.2	1200	1218	1200
2025-07-01	1210.2	1200	1218	1200
2025-06-01	1210.2	1200	1218	1200
2025-05-01	1210.2	1200	1218	1200
2025-04-01	1210.2	1200	1218	1200
2025-03-01	1210.2	1200	1218	1200
2025-02-01	1210.2	1200	1218	1200
2025-01-01	1210.2	1200	1218	1200
2024-12-01	1210.2	1200	1218	1200
2024-11-01	1210.2	1200	1218	1200
2024-10-01	1210.2	1200	1218	1200
2024-09-01	1210.2	1200	1218	1200
2024-08-01	1210.2	1200	1218	1200
2024-07-01	1210.2	1200	1218	1200
2024-06-01	1210.2	1200	1218	1200
2024-08-01	1209.3	1200	1214	1200
2024-04-01	1209.3	1200	1214	1200
2024-03-01	1209.3	1200	1214	1200
2024-02-01	1209.3	1200	1214	1200
2024-01-01	1209.3	1200	1214	1200
2023-12-01	1209.3	1200	1214	1200
2023-11-01	1209.3	1200	1214	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	Lower West Top Schools 2024 (U15)	2024-05-11	2024-05-11	Rapid	West Coast (WCU)	5	4	2	Yes	Analysis
2	St Helenabaai Open 2023 (Development)	2023-05-13	2023-05-13	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis

#	Games	Start				End
1	4	Tournament St Helenabaai Open 2023				Tournament Lower West Top Schools 2024
		date 2023-05-13	rnd 3	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Samuels, J (Jada)				Opponent Van Rooyen, C (Curtley)
2	1	Tournament Lower West Top Schools 2024				Tournament Lower West Top Schools 2024
		date 2024-05-11	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Oliver, J (Jeandre)				Opponent Oliver, J (Jeandre)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament St Helenabaai Open 2023				Tournament Lower West Top Schools 2024
		date 2023-05-13	rnd 3	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Samuels, J (Jada)				Opponent Van Rooyen, C (Curtley)
2	1	Tournament Lower West Top Schools 2024				Tournament Lower West Top Schools 2024
		date 2024-05-11	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Oliver, J (Jeandre)				Opponent Oliver, J (Jeandre)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament St Helenabaai Open 2023				Tournament Lower West Top Schools 2024
		date 2023-05-13	rnd 3	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Samuels, J (Jada)				Opponent Van Rooyen, C (Curtley)
2	1	Tournament Lower West Top Schools 2024				Tournament Lower West Top Schools 2024
		date 2024-05-11	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Oliver, J (Jeandre)				Opponent Oliver, J (Jeandre)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament St Helenabaai Open 2023				Tournament Lower West Top Schools 2024
		date 2023-05-13	rnd 3	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 1
		Opponent Samuels, J (Jada)				Opponent Van Rooyen, C (Curtley)
2	1	Tournament Lower West Top Schools 2024				Tournament Lower West Top Schools 2024
		date 2024-05-11	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 5	type Rapid	result 1
		Opponent Oliver, J (Jeandre)				Opponent Oliver, J (Jeandre)

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	Warner ,A (Alicia)	1	0	-425	0	0	0	1	0	-425	0	0	0
1	Warner ,A (Alicia)	1	1306.7	881.7	0	0	0	1	1398.7	881.7	0	0	0
2	Van Rooyen ,C (Curtley)	1	1	425	0	0	0	1	1	425	0	0	0
2	Van Rooyen ,C (Curtley)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
3	Stevens ,E (Elmodene)	1	1	425	0	0	0	1	1	425	0	0	0
3	Stevens ,E (Elmodene)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
4	September ,G (G-Naro)	1	0	-425	0	0	0	1	0	-425	0	0	0
4	September ,G (G-Naro)	1	1109.8	684.8	0	0	0	1	1073.2	684.8	0	0	0
5	Samuels ,J (Jada)	1	1	425	0	0	0	1	1	425	0	0	0
5	Samuels ,J (Jada)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
6	De Bruin ,M (Matthew)	1	0	-425	0	0	0	1	0	-425	0	0	0
6	De Bruin ,M (Matthew)	1	1167	742	0	0	0	1	1153.2	742	0	0	0
7	Oliver ,J (Jeandre)	1	1	425	0	0	0	1	1	425	0	0	0
7	Oliver ,J (Jeandre)	1	1190.6	1615.6	0	0	0	1	1186	1615.6	0	0	0
8	Matthyse ,M (Michael)	1	1	425	0	0	0	1	1	425	0	0	0
8	Matthyse ,M (Michael)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
9	Peacock ,C (Christian)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Peacock ,C (Christian)	1	1200	775	0	0	0	1	1200	775	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

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PLAYER PAGE

Personal

Cosa, L (Lonwaba)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms