Chess South Africa Ratings Database

PLAYER PAGE

Personal

Ernst, AJ (Alex Johan)

Chess SA id

109085214

FIDE id

Date of birth

2009-05-06 (U18)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2019-07-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	968.1	944.4	1160.7	1200
Raw rating	968.1	944.4	1160.7	1200
Weighted rating	968.1	944.4	1160.7	1200
Weighted performance	187.3	177	0	0
Floor	700	700	717.2	700
K-factor	36	36	36	36
Min/Max rating change allowed	230.7	238.7	175.4	165.8
Highest rating	1200 2018-02-01	1200 2018-02-01	1232.7 2018-05-01	1200 2018-10-01
Highest raw rating	1200 2018-02-01	1200 2018-02-01	1217.2 2018-06-01	1200 2024-02-01
Highest weighted rating	1200 2018-02-01	1200 2018-02-01	1217.2 2019-05-01	1200 2018-10-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1232.7 2018-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	968.1	944.4	1160.7	1200
Analysis
Rating	968.1	944.4	1160.7	1200
Raw rating	968.1	944.4	1160.7	1200
Weighted rating	968.1	944.4	1160.7
Weighted performance	187.3	177	0
K-factor	36	36	36	36
Floor	700	700	717.2	700
Max/Min rating change allowed	230.7	238.7	175.4	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	968.1	944.4	1160.7	1200
New weighted rating	968.1	944.4	1160.7	1200
New weighted performance	181.6	171.4	0	0
Temp new rating	968.1	944.4	1160.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	968.1	944.4	1160.7	1200
New K-factor	36	36	36	36
New floor	700	700	717.2	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	66	56	10

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
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	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
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	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	56	19.5	34.82	-129	1031.3	902.3
Standard	46	14.5	31.52	-157.1	1013.2	856.1
Rapid	10	5	50	0	1114.6	1114.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	968.1	944.4	1160.7	1200
2025-09-30	968.1	944.4	1160.7	1200
2025-09-01	968.1	944.4	1160.7	1200
2025-08-01	968.1	944.4	1160.7	1200
2025-07-01	968.1	944.4	1160.7	1200
2025-06-01	968.1	944.4	1160.7	1200
2025-05-01	968.1	944.4	1160.7	1200
2025-04-01	968.1	944.4	1160.7	1200
2025-03-01	968.1	944.4	1160.7	1200
2025-02-01	968.1	944.4	1160.7	1200
2025-01-01	968.1	944.4	1160.7	1200
2024-12-01	968.1	944.4	1160.7	1200
2024-11-01	968.1	944.4	1160.7	1200
2024-10-01	968.1	944.4	1160.7	1200
2024-09-01	968.1	944.4	1160.7	1200
2024-08-01	968.1	944.4	1160.7	1200
2024-07-01	968.1	944.4	1160.7	1200
2024-09-01	968.1	944.4	1160.7	1200
2024-05-01	968.1	944.4	1160.7	1200
2024-04-01	968.1	944.4	1160.7	1200
2024-03-01	968.1	944.4	1160.7	1200
2024-02-01	968.1	944.4	1160.7	1200
2024-01-01	968.1	944.4	1160.7	1200
2023-12-01	968.1	944.4	1160.7	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	2019 D4 Tshwane South Schools League Team Finals (U11)	2019-07-27	2019-07-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
2	2019 Super 12 Laerskole (Juniors)	2019-05-04	2019-05-04	Rapid	Tshwane (GTP)	5	5	1.5	Yes	Analysis
3	2019 Capablanca Chess Festival (Swiss D)	2019-04-19	2019-04-21	Standard	Tshwane (GTP)	7	7	2.5	Yes	Analysis
4	2019 D4 Individual Finals (U11 Mixed)	2019-03-09	2019-03-09	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
5	2019 Constantia Park Open (D)	2019-02-09	2019-02-09	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
6	2018 Lardies Ope (D)	2018-10-27	2018-10-27	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
7	2018 D4 Tshwane South Schools League Finals (U9)	2018-08-03	2018-08-03	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
8	2018 Super 12 (Junior)	2018-05-05	2018-05-05	Rapid	Tshwane (GTP)	5	5	3.5	Yes	Analysis
9	2018 Capablanca Swiss (D)	2018-04-27	2018-04-27	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
10	2018 D4 Tshwane North Individual Chess Championships (U9 Boys)	2018-03-10	2018-03-10	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
11	2018 Constantia Park Open (D)	2018-02-10	2018-02-10	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis

#	Games	Start				End
1	5	Tournament 2019 Constantia Park Open				Tournament 2019 D4 Individual Finals
		date 2019-02-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 2	type Standard	result 0.5
		Opponent Scholtz, A (Aydin)				Opponent Mostert, M (Mj)
2	4	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 2	type Rapid	result 1	date 2018-05-05	rnd 5	type Rapid	result 0.5
		Opponent Killian, T (Tristan)				Opponent Matthee, WD (William)
3	3	Tournament 2019 Capablanca Chess Festival				Tournament 2019 Capablanca Chess Festival
		date 2019-04-20	rnd 3	type Standard	result 0.5	date 2019-04-20	rnd 5	type Standard	result 1
		Opponent Nel, H (Henco)				Opponent Erasmus, J (Jean-Zack)

#	Games	Start				End
1	5	Tournament 2019 Constantia Park Open				Tournament 2019 D4 Individual Finals
		date 2019-02-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 2	type Standard	result 0.5
		Opponent Scholtz, A (Aydin)				Opponent Mostert, M (Mj)
2	3	Tournament 2019 Capablanca Chess Festival				Tournament 2019 Capablanca Chess Festival
		date 2019-04-20	rnd 3	type Standard	result 0.5	date 2019-04-20	rnd 5	type Standard	result 1
		Opponent Nel, H (Henco)				Opponent Erasmus, J (Jean-Zack)
3	2	Tournament 2019 D4 Tshwane South Schools League Team Finals				Tournament 2019 D4 Tshwane South Schools League Team Finals
		date 2019-07-27	rnd 2	type Standard	result 0.5	date 2019-07-27	rnd 3	type Standard	result 1
		Opponent Nel, J (Jarno)				Opponent Visser, DS (David)

#	Games	Start				End
1	5	Tournament 2018 Super 12				Tournament 2019 Super 12 Laerskole
		date 2018-05-05	rnd 2	type Rapid	result 1	date 2019-05-04	rnd 1	type Rapid	result 1
		Opponent Killian, T (Tristan)				Opponent Theron, J (Jayden)
2	1	Tournament 2019 Super 12 Laerskole				Tournament 2019 Super 12 Laerskole
		date 2019-05-04	rnd 5	type Rapid	result 0.5	date 2019-05-04	rnd 5	type Rapid	result 0.5
		Opponent Gough, R (Rowan)				Opponent Gough, R (Rowan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 2	type Rapid	result 1	date 2018-05-05	rnd 4	type Rapid	result 1
		Opponent Killian, T (Tristan)				Opponent Booysen, A (Aj)
2	2	Tournament 2019 Capablanca Chess Festival				Tournament 2019 Capablanca Chess Festival
		date 2019-04-20	rnd 4	type Standard	result 1	date 2019-04-20	rnd 5	type Standard	result 1
		Opponent Smit, W (Wian)				Opponent Erasmus, J (Jean-Zack)
3	1	Tournament 2019 D4 Tshwane South Schools League Team Finals				Tournament 2019 D4 Tshwane South Schools League Team Finals
		date 2019-07-27	rnd 3	type Standard	result 1	date 2019-07-27	rnd 3	type Standard	result 1
		Opponent Visser, DS (David)				Opponent Visser, DS (David)

#	Games	Start				End
1	2	Tournament 2019 Capablanca Chess Festival				Tournament 2019 Capablanca Chess Festival
		date 2019-04-20	rnd 4	type Standard	result 1	date 2019-04-20	rnd 5	type Standard	result 1
		Opponent Smit, W (Wian)				Opponent Erasmus, J (Jean-Zack)
2	1	Tournament 2019 D4 Tshwane South Schools League Team Finals				Tournament 2019 D4 Tshwane South Schools League Team Finals
		date 2019-07-27	rnd 3	type Standard	result 1	date 2019-07-27	rnd 3	type Standard	result 1
		Opponent Visser, DS (David)				Opponent Visser, DS (David)
3	1	Tournament 2019 Constantia Park Open				Tournament 2019 Constantia Park Open
		date 2019-02-09	rnd 5	type Standard	result 1	date 2019-02-09	rnd 5	type Standard	result 1
		Opponent Noome, O (Owen Joseph)				Opponent Noome, O (Owen Joseph)

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 2	type Rapid	result 1	date 2018-05-05	rnd 4	type Rapid	result 1
		Opponent Killian, T (Tristan)				Opponent Booysen, A (Aj)
2	1	Tournament 2019 Super 12 Laerskole				Tournament 2019 Super 12 Laerskole
		date 2019-05-04	rnd 1	type Rapid	result 1	date 2019-05-04	rnd 1	type Rapid	result 1
		Opponent Theron, J (Jayden)				Opponent Theron, J (Jayden)

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	Nel ,H (Henco)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
1	Nel ,H (Henco)	2	948.2	1160.8	2	921.2	1160.8	0	0	0	0	0	0
2	Smit ,A (Anika)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Smit ,A (Anika)	2	737.7	312.7	2	730.8	312.7	0	0	0	0	0	0
3	Venter ,D (Dian)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Venter ,D (Dian)	2	999.3	574.3	2	976.4	574.3	0	0	0	0	0	0
4	Mostert ,M (Mj)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
4	Mostert ,M (Mj)	2	979.7	767.2	2	961.2	767.2	0	0	0	0	0	0
5	Smith ,LM (Luhane Mari)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Smith ,LM (Luhane Mari)	2	1133.8	708.8	2	1119.8	708.8	0	0	0	0	0	0
6	Smit ,W (Wian)	1	1	425	1	1	425	0	0	0	0	0	0
6	Smit ,W (Wian)	1	840.2	1265.2	1	834.3	1265.2	0	0	0	0	0	0
7	Cilliers ,A (Adriaan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Cilliers ,A (Adriaan)	1	802.4	377.4	1	813.2	377.4	0	0	0	0	0	0
8	Wang ,Y (Yiren)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Wang ,Y (Yiren)	1	681.8	256.8	1	702	256.8	0	0	0	0	0	0
9	Vlok ,J (Jan)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Vlok ,J (Jan)	1	1010	585	1	985.4	585	0	0	0	0	0	0
10	Van Loggerenberg ,L (Logan)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Van Loggerenberg ,L (Logan)	1	846.7	421.7	1	857.8	421.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Ernst, AJ (Alex Johan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms