Chess South Africa Ratings Database

PLAYER PAGE

Personal

Cohn, A (Alexander Leopoldt)

Chess SA id

1160159458

FIDE id

Date of birth

2016-05-17 (U10)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-10-04

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1189.9	1186.7	1200	1200
Raw rating	1189.9	1186.7	1200	1200
Weighted rating	1188.4	1184.8	1200	1200
Weighted performance	0	0	0	0
Floor	709.2	709.7	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	168.2	169	165.8	165.8
Highest rating	1209.2 2024-09-01	1209.7 2024-09-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1209.2 2024-09-01	1209.7 2024-09-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1209.2 2018-10-01	1209.7 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1201.2 2024-08-01	1200 2019-12-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1189.9	1186.7	1200	1200
Analysis
Rating	1189.9	1186.7	1200	1200
Raw rating	1189.9	1186.7	1200	1200
Weighted rating	1188.4	1184.8	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	709.2	709.7	700	700
Max/Min rating change allowed	168.2	169	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	1189.9	1186.7	1200	1200
New weighted rating	1188.3	1184.7	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1189.9	1186.7	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1189.9	1186.7	1200	1200
New K-factor	36	36	36	36
New floor	709.2	709.7	700	700

Item	Main	Standard
	0	0
	0	0
	21	21
	0	0
	0	0
	0	0
History	21	21

Games since
	Main 21	Standard 21		Rapid 0		Blitz 0
Gender	Male
Age group	U10
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 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	21	9	42.86	-60.7	1205.7	1145
Standard	21	9	42.86	-60.7	1205.7	1145
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1189.9	1186.7	1200	1200
2025-09-01	1189.9	1186.7	1200	1200
2025-08-01	1189.9	1186.7	1200	1200
2025-07-01	1189.9	1186.7	1200	1200
2025-06-01	1189.9	1186.7	1200	1200
2025-05-01	1189.9	1186.7	1200	1200
2025-04-01	1189.9	1186.7	1200	1200
2025-03-01	1189.9	1186.7	1200	1200
2025-02-01	1188.2	1184.7	1200	1200
2025-01-01	1160.8	1150.7	1200	1200
2024-12-01	1160.8	1150.7	1200	1200
2024-11-01	1160.8	1150.7	1200	1200
2024-10-01	1209.2	1209.7	1200	1200
2024-09-01	1209.2	1209.7	1200	1200
2024-08-01	1190.4	1187.4	1200	1200
2024-07-01	1190.4	1187.4	1200	1200
2024-06-01	1199.1	1197.8	1200	1200
2024-08-01	1199.1	1197.8	1200	1200
2024-04-01	1199.1	1197.8	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
2023-11-01	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	Gauteng Top Schools 2024 (U9 Open)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
2	Sedibeng East D7 Teams Trials 2024 (U9)	2024-08-03	2024-08-03	Standard	Sedibeng (GSV)	6	6	3.5	Yes	Analysis
3	AG Visser Open 2024 (E)	2024-06-08	2024-06-08	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
4	Laerskool Midvaal Chess Open Section 2024 (E)	2024-02-10	2024-02-10	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis

#	Games	Start				End
1	3	Tournament Laerskool Midvaal Chess Open Section 2024				Tournament Laerskool Midvaal Chess Open Section 2024
		date 2024-02-10	rnd 2	type Standard	result 0.5	date 2024-02-10	rnd 4	type Standard	result 1
		Opponent Askevold, T (Tertius)				Opponent Roux, R (Rivan)
2	2	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Gauteng Top Schools 2024
		date 2024-08-03	rnd 6	type Standard	result 1	date 2024-10-04	rnd 1	type Standard	result 1
		Opponent Lelago, J (Jonathan)				Opponent Leshilo, B (Bathabile)
3	2	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Sedibeng East D7 Teams Trials 2024
		date 2024-08-03	rnd 3	type Standard	result 1	date 2024-08-03	rnd 4	type Standard	result 0.5
		Opponent Lelago, J (Jonathan)				Opponent Collen, L (Luca)

#	Games	Start				End
1	3	Tournament Laerskool Midvaal Chess Open Section 2024				Tournament Laerskool Midvaal Chess Open Section 2024
		date 2024-02-10	rnd 2	type Standard	result 0.5	date 2024-02-10	rnd 4	type Standard	result 1
		Opponent Askevold, T (Tertius)				Opponent Roux, R (Rivan)
2	2	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Gauteng Top Schools 2024
		date 2024-08-03	rnd 6	type Standard	result 1	date 2024-10-04	rnd 1	type Standard	result 1
		Opponent Lelago, J (Jonathan)				Opponent Leshilo, B (Bathabile)
3	2	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Sedibeng East D7 Teams Trials 2024
		date 2024-08-03	rnd 3	type Standard	result 1	date 2024-08-03	rnd 4	type Standard	result 0.5
		Opponent Lelago, J (Jonathan)				Opponent Collen, L (Luca)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Gauteng Top Schools 2024
		date 2024-08-03	rnd 6	type Standard	result 1	date 2024-10-04	rnd 1	type Standard	result 1
		Opponent Lelago, J (Jonathan)				Opponent Leshilo, B (Bathabile)
2	2	Tournament Laerskool Midvaal Chess Open Section 2024				Tournament Laerskool Midvaal Chess Open Section 2024
		date 2024-02-10	rnd 3	type Standard	result 1	date 2024-02-10	rnd 4	type Standard	result 1
		Opponent Strydom, M (Mene)				Opponent Roux, R (Rivan)
3	1	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Sedibeng East D7 Teams Trials 2024
		date 2024-08-03	rnd 3	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Lelago, J (Jonathan)				Opponent Lelago, J (Jonathan)

#	Games	Start				End
1	2	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Gauteng Top Schools 2024
		date 2024-08-03	rnd 6	type Standard	result 1	date 2024-10-04	rnd 1	type Standard	result 1
		Opponent Lelago, J (Jonathan)				Opponent Leshilo, B (Bathabile)
2	2	Tournament Laerskool Midvaal Chess Open Section 2024				Tournament Laerskool Midvaal Chess Open Section 2024
		date 2024-02-10	rnd 3	type Standard	result 1	date 2024-02-10	rnd 4	type Standard	result 1
		Opponent Strydom, M (Mene)				Opponent Roux, R (Rivan)
3	1	Tournament Sedibeng East D7 Teams Trials 2024				Tournament Sedibeng East D7 Teams Trials 2024
		date 2024-08-03	rnd 3	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Lelago, J (Jonathan)				Opponent Lelago, J (Jonathan)

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	Collen ,L (Luca)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
1	Collen ,L (Luca)	3	1195	1195	3	1193.2	1195	0	0	0	0	0	0
2	Malilani ,A (Atinatsa David)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Malilani ,A (Atinatsa David)	2	1228.9	803.9	2	1210.9	803.9	0	0	0	0	0	0
3	Lelago ,J (Jonathan)	2	2	425	2	2	425	0	0	0	0	0	0
3	Lelago ,J (Jonathan)	2	1200	1625	2	1200	1625	0	0	0	0	0	0
4	Hauptfleisch ,I (Isabella)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Hauptfleisch ,I (Isabella)	1	1200	775	1	1200	775	0	0	0	0	0	0
5	Zhang ,Y (Yufeng)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Zhang ,Y (Yufeng)	1	1240.6	815.6	1	1231.9	815.6	0	0	0	0	0	0
6	Roux ,R (Rivan)	1	1	425	1	1	425	0	0	0	0	0	0
6	Roux ,R (Rivan)	1	1143.4	1568.4	1	1136.8	1568.4	0	0	0	0	0	0
7	Strydom ,M (Mene)	1	1	425	1	1	425	0	0	0	0	0	0
7	Strydom ,M (Mene)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Askevold ,T (Tertius)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Askevold ,T (Tertius)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
9	Myburgh ,A (Alex)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Myburgh ,A (Alex)	1	1249.7	824.7	1	1245.2	824.7	0	0	0	0	0	0
10	Leshilo ,B (Bathabile)	1	1	425	1	1	425	0	0	0	0	0	0
10	Leshilo ,B (Bathabile)	1	1200	1625	1	1200	1625	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

Cohn, A (Alexander Leopoldt)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms