Chess South Africa Ratings Database

PLAYER PAGE

Personal

Coertse, J (Jaimi)

Chess SA id

108081020

FIDE id

Date of birth

2008-02-13 (U18)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1156.8	1095.3	1021.2	756.4
Raw rating	1156.8	1095.3	1021.2	756.4
Weighted rating	1131.5	1060.3	1005.8	756.4
Weighted performance	867.4	852.3	0	0
Floor	656.8	595.3	521.2	500
K-factor	40	40	40	40
Min/Max rating change allowed	176.3	192.5	213.9	312
Highest rating	1200 2024-11-01	1200 2024-11-01	1284.3 2018-05-01	1200 2024-02-01
Highest raw rating	1156.8 2025-09-01	1095.3 2025-09-01	1021.2 2024-11-01	756.4 2024-02-01
Highest weighted rating	1151 2024-11-01	1071.6 2024-11-01	1021.2 2024-11-01	756.4 2024-11-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1284.3 2018-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1156.8	1095.3	1021.2	756.4
Analysis
Rating	1156.8	1095.3	1021.2	756.4
Raw rating	1156.8	1095.3	1021.2	756.4
Weighted rating	1131.5	1060.3	1005.8
Weighted performance	867.4	852.3	0
K-factor	40	40	40	40
Floor	656.8	595.3	521.2	500
Max/Min rating change allowed	176.3	192.5	213.9	312
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	1156.8	1095.3	1021.2	756.4
New weighted rating	1135.4	1064.8	1008.2	756.4
New weighted performance	867	851.9	0	0
Temp new rating	1156.8	1095.3	1021.2	756.4
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1156.8	1095.3	1021.2	756.4
New K-factor	40	40	40	40
New floor	656.8	595.3	521.2	500

Item	Main	Standard	Rapid
	0	0	0
	5	5	0
	7	5	2
	5	5	0
	0	0	0
	0	0	0
History	166	124	42

Games since
	Main 12	Standard 10		Rapid 2		Blitz 0
Gender	Male
Age group	U18
Region	Ekurhuleni (GE)
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	5	2	40	-85	1274	1189
Standard	5	2	40	-85	1274	1189
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	63	33.5	53.17	27	1044.6	1071.6
Standard	51	23.5	46.08	-33.3	1020.2	986.9
Rapid	12	10	83.33	283.3	1148.4	1431.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1156.8	1095.3	1021.2	756.4
2025-09-01	1156.8	1095.3	1021.2	756.4
2025-08-01	1151	1071.6	1021.2	756.4
2025-07-01	1151	1071.6	1021.2	756.4
2025-06-01	1151	1071.6	1021.2	756.4
2025-05-01	1151	1071.6	1021.2	756.4
2025-04-01	1151	1071.6	1021.2	756.4
2025-03-01	1151	1071.6	1021.2	756.4
2025-02-01	1151	1071.6	1021.2	756.4
2025-01-01	1151	1071.6	1021.2	756.4
2024-12-01	1151	1071.6	1021.2	756.4
2024-11-01	1151	1071.6	1021.2	756.4
2024-10-01	1111.4	1071.6	962	756.4
2024-09-01	1111.4	1071.6	962	756.4
2024-08-01	1056.3	989.6	962	756.4
2024-07-01	1056.3	989.6	962	756.4
2024-06-01	1056.3	989.6	962	756.4
2024-08-01	1056.3	989.6	962	756.4
2024-04-01	1056.3	989.6	962	756.4
2024-03-01	1056.3	989.6	962	756.4
2024-02-01	1056.3	989.6	962	756.4
2024-01-01	1056.3	989.6	962	756.4
2023-12-01	1056.3	989.6	962	756.4
2023-11-01	1056.3	989.6	962	756.4

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 Tshwane South School District CLOSED League Championship (U17A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District CLOSED League Championship (U17A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
2	Gauteng Top Schools 2024 (U17 Open)	2024-10-05	2024-10-05	Rapid	Ekurhuleni (GE)	5	2	2	Yes	Analysis
3	D4 Tshwane South District Schools Teams Chess Tournament 2024 (U17A)	2024-08-03	2024-08-03	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
4	2023 Tshwane South School District CLOSED Individual Championships (U15 Open)	2023-04-22	2023-04-22	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
5	2019 Super 12 Laerskole (Seniors)	2019-05-04	2019-05-04	Rapid	Tshwane (GTP)	5	5	3	Yes	Analysis
6	Inter Region GE vs JHB Metro 2018 (U12B)	2018-10-06	2018-10-06	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
7	Witfield Open 2018 (C)	2018-07-21	2018-07-21	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	Boksburg Chess Club Open 2018 (U12)	2018-07-14	2018-07-14	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
9	Ekurhuleni Trials 3 2018 (U12)	2018-06-16	2018-06-16	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
10	2018 Super 12 (Junior)	2018-05-05	2018-05-05	Rapid	Tshwane (GTP)	5	5	5	Yes	Analysis
11	Ekurhuleni Trials 2 2018 (U12)	2018-04-21	2018-04-21	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
12	Human Rights Day Open 2018 (C)	2018-03-21	2018-03-21	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
13	South African Junior Team Championships 2017 (U10B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	6	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament 2018 Super 12				Tournament Ekurhuleni Trials 3 2018
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-06-16	rnd 1	type Standard	result 1
		Opponent Voigt, D (Daniel)				Opponent Van Wyk, L (Leo)
2	3	Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024				Tournament Gauteng Top Schools 2024
		date 2024-08-03	rnd 5	type Standard	result 1	date 2024-10-05	rnd 2	type Rapid	result 1
		Opponent Venter, L (Louis-Christo)				Opponent Sambo, L (Loago Firtunate)
3	3	Tournament Witfield Open 2018				Tournament Inter Region GE vs JHB Metro 2018
		date 2018-07-21	rnd 4	type Standard	result 1	date 2018-10-06	rnd 1	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jayden)				Opponent Fauconier, A (Amber)

#	Games	Start				End
1	3	Tournament Witfield Open 2018				Tournament Inter Region GE vs JHB Metro 2018
		date 2018-07-21	rnd 4	type Standard	result 1	date 2018-10-06	rnd 1	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jayden)				Opponent Fauconier, A (Amber)
2	2	Tournament 2025 Tshwane South School District CLOSED League Championship				Tournament 2025 Tshwane South School District CLOSED League Championship
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 3	type Standard	result 1
		Opponent Skosana, S (Sphamandla)				Opponent Breydenbach, J (Jayson)
3	2	Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024				Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024
		date 2024-08-03	rnd 1	type Standard	result 1	date 2024-08-03	rnd 2	type Standard	result 1
		Opponent Smith, C (Christian)				Opponent Fourie, E (Ewan)

#	Games	Start				End
1	5	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-05-05	rnd 5	type Rapid	result 1
		Opponent Voigt, D (Daniel)				Opponent Sutherland, R (Reuben)
2	4	Tournament 2019 Super 12 Laerskole				Tournament Gauteng Top Schools 2024
		date 2019-05-04	rnd 4	type Rapid	result 1	date 2024-10-05	rnd 2	type Rapid	result 1
		Opponent Dyason, N (Nicola)				Opponent Sambo, L (Loago Firtunate)
3	1	Tournament 2019 Super 12 Laerskole				Tournament 2019 Super 12 Laerskole
		date 2019-05-04	rnd 2	type Rapid	result 1	date 2019-05-04	rnd 2	type Rapid	result 1
		Opponent Posthumus, R (Ruan)				Opponent Posthumus, R (Ruan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament 2018 Super 12				Tournament Ekurhuleni Trials 3 2018
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-06-16	rnd 1	type Standard	result 1
		Opponent Voigt, D (Daniel)				Opponent Van Wyk, L (Leo)
2	3	Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024				Tournament Gauteng Top Schools 2024
		date 2024-08-03	rnd 5	type Standard	result 1	date 2024-10-05	rnd 2	type Rapid	result 1
		Opponent Venter, L (Louis-Christo)				Opponent Sambo, L (Loago Firtunate)
3	3	Tournament Witfield Open 2018				Tournament Inter Region GE vs JHB Metro 2018
		date 2018-07-21	rnd 4	type Standard	result 1	date 2018-10-06	rnd 1	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jayden)				Opponent Fauconier, A (Amber)

#	Games	Start				End
1	3	Tournament Witfield Open 2018				Tournament Inter Region GE vs JHB Metro 2018
		date 2018-07-21	rnd 4	type Standard	result 1	date 2018-10-06	rnd 1	type Standard	result 1
		Opponent Janse Van Rensburg, J (Jayden)				Opponent Fauconier, A (Amber)
2	2	Tournament 2025 Tshwane South School District CLOSED League Championship				Tournament 2025 Tshwane South School District CLOSED League Championship
		date 2025-08-16	rnd 2	type Standard	result 1	date 2025-08-16	rnd 3	type Standard	result 1
		Opponent Skosana, S (Sphamandla)				Opponent Breydenbach, J (Jayson)
3	2	Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024				Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024
		date 2024-08-03	rnd 1	type Standard	result 1	date 2024-08-03	rnd 2	type Standard	result 1
		Opponent Smith, C (Christian)				Opponent Fourie, E (Ewan)

#	Games	Start				End
1	5	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 1	type Rapid	result 1	date 2018-05-05	rnd 5	type Rapid	result 1
		Opponent Voigt, D (Daniel)				Opponent Sutherland, R (Reuben)
2	4	Tournament 2019 Super 12 Laerskole				Tournament Gauteng Top Schools 2024
		date 2019-05-04	rnd 4	type Rapid	result 1	date 2024-10-05	rnd 2	type Rapid	result 1
		Opponent Dyason, N (Nicola)				Opponent Sambo, L (Loago Firtunate)
3	1	Tournament 2019 Super 12 Laerskole				Tournament 2019 Super 12 Laerskole
		date 2019-05-04	rnd 2	type Rapid	result 1	date 2019-05-04	rnd 2	type Rapid	result 1
		Opponent Posthumus, R (Ruan)				Opponent Posthumus, R (Ruan)

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	Janse Van Rensburg ,J (Jayden)	2	2	425	2	2	425	0	0	0	0	0	0
1	Janse Van Rensburg ,J (Jayden)	2	928.6	1353.6	2	911.8	1353.6	0	0	0	0	0	0
2	Olivier ,J (Juvandre)	1	1	425	1	1	425	0	0	0	0	0	0
2	Olivier ,J (Juvandre)	1	639.8	1064.8	1	639.8	1064.8	0	0	0	0	0	0
3	Ackerman ,L (Linda)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Ackerman ,L (Linda)	1	1204.6	779.6	1	1206.8	779.6	0	0	0	0	0	0
4	Albrecht ,E (Eben)	1	1	425	1	1	425	0	0	0	0	0	0
4	Albrecht ,E (Eben)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Bhudai ,A (Arman)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Bhudai ,A (Arman)	1	1246.6	821.6	1	1234.9	821.6	0	0	0	0	0	0
6	Verkerk ,R (Robert)	1	1	425	1	1	425	0	0	0	0	0	0
6	Verkerk ,R (Robert)	1	958.8	1383.8	1	945.4	1383.8	0	0	0	0	0	0
7	Greyling ,D (Duncan)	1	1	425	1	1	425	0	0	0	0	0	0
7	Greyling ,D (Duncan)	1	1034.2	1459.2	1	1034.2	1459.2	0	0	0	0	0	0
8	Myburgh ,J (Jacques)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Myburgh ,J (Jacques)	1	1296.8	871.8	1	1295.4	871.8	0	0	0	0	0	0
9	Smith ,C (Christian)	1	1	425	1	1	425	0	0	0	0	0	0
9	Smith ,C (Christian)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
10	De Wet ,RJ (Reuben Jacques)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	De Wet ,RJ (Reuben Jacques)	1	1016.4	591.4	1	1031.9	591.4	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Coertse, J (Jaimi)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms