Chess South Africa Ratings Database

PLAYER PAGE

Personal

Coertzen, W (Wihan)

Chess SA id

1070153489

FIDE id

Date of birth

2007-08-27 (U20)

Gender

Male

Region

Mangaung (FMB)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-02-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1175	1200	1113.6	1200
Raw rating	1175	1200	1113.6	1200
Weighted rating	1172.8	1200	1107.9	1200
Weighted performance	0	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	171.8	165.8	187.5	165.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1200 2019-12-01	1200 2024-02-01	1200 2019-12-01	1200 2024-02-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1200 2019-12-01	1200 2024-02-01	1200 2019-12-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1175	1200	1113.6	1200
Analysis
Rating	1175	1200	1113.6	1200
Raw rating	1175	1200	1113.6	1200
Weighted rating	1172.8	1200	1107.9
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	171.8	165.8	187.5	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	1175	1200	1113.6	1200
New weighted rating	1172.8	1200	1107.9	1200
New weighted performance	0	0	0	0
Temp new rating	1175	1200	1113.6	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1175	1200	1113.6	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

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

Games since
	Main 5	Standard 0		Rapid 5		Blitz 0
Gender	Male
Age group	U20
Region	Mangaung (FMB)
Province	Free State (FS)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	2	22.22	-236.1	1217.8	981.7
Standard	0	0	0	0	0	0
Rapid	9	2	22.22	-236.1	1217.8	981.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1175	1200	1113.6	1200
2025-09-01	1175	1200	1113.6	1200
2025-08-01	1175	1200	1113.6	1200
2025-07-01	1175	1200	1113.6	1200
2025-06-01	1175	1200	1113.6	1200
2025-05-01	1175	1200	1113.6	1200
2025-04-01	1175	1200	1113.6	1200
2025-03-01	1175	1200	1113.6	1200
2025-02-01	1175	1200	1113.6	1200
2025-01-01	1167	1200	1092.7	1200
2024-12-01	1167	1200	1092.7	1200
2024-11-01	1167	1200	1092.7	1200
2024-10-01	1167	1200	1092.7	1200
2024-09-01	1167	1200	1092.7	1200
2024-08-01	1167	1200	1092.7	1200
2024-07-01	1167	1200	1092.7	1200
2024-06-01	1167	1200	1092.7	1200
2024-08-01	1167	1200	1092.7	1200
2024-04-01	1167	1200	1092.7	1200
2024-03-01	1167	1200	1092.7	1200
2024-02-01	1197.6	1200	1173	1200
2024-01-01	1197.6	1200	1173	1200
2023-12-01	1197.6	1200	1173	1200
2023-11-01	1197.6	1200	1173	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	Bloemfontein High School League 16 February 2024 (U17A)	2024-02-16	2024-02-16	Rapid	Mangaung (FMB)	5	5	0	Yes	Analysis
2	Bloemfontein Highschool League 24 Feb 2023 (U17)	2023-02-24	2023-02-24	Rapid	Mangaung (FMB)	5	4	2	Yes	Analysis

#	Games	Start				End
1	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 5	type Rapid	result 1	date 2023-02-24	rnd 5	type Rapid	result 1
		Opponent Pitso, T (Tsebo)				Opponent Pitso, T (Tsebo)
2	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 3	type Rapid	result 1	date 2023-02-24	rnd 3	type Rapid	result 1
		Opponent Venter, C (Christopher)				Opponent Venter, C (Christopher)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 5	type Rapid	result 1	date 2023-02-24	rnd 5	type Rapid	result 1
		Opponent Pitso, T (Tsebo)				Opponent Pitso, T (Tsebo)
2	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 3	type Rapid	result 1	date 2023-02-24	rnd 3	type Rapid	result 1
		Opponent Venter, C (Christopher)				Opponent Venter, C (Christopher)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 5	type Rapid	result 1	date 2023-02-24	rnd 5	type Rapid	result 1
		Opponent Pitso, T (Tsebo)				Opponent Pitso, T (Tsebo)
2	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 3	type Rapid	result 1	date 2023-02-24	rnd 3	type Rapid	result 1
		Opponent Venter, C (Christopher)				Opponent Venter, C (Christopher)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 5	type Rapid	result 1	date 2023-02-24	rnd 5	type Rapid	result 1
		Opponent Pitso, T (Tsebo)				Opponent Pitso, T (Tsebo)
2	1	Tournament Bloemfontein Highschool League 24 Feb 2023				Tournament Bloemfontein Highschool League 24 Feb 2023
		date 2023-02-24	rnd 3	type Rapid	result 1	date 2023-02-24	rnd 3	type Rapid	result 1
		Opponent Venter, C (Christopher)				Opponent Venter, C (Christopher)

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	Pretorius ,A (Ane)	1	0	-425	0	0	0	1	0	-425	0	0	0
1	Pretorius ,A (Ane)	1	1206.6	781.6	0	0	0	1	724.8	781.6	0	0	0
2	Pitso ,T (Tsebo)	1	1	425	0	0	0	1	1	425	0	0	0
2	Pitso ,T (Tsebo)	1	1198.7	1623.7	0	0	0	1	1200	1623.7	0	0	0
3	Melville ,J (Joalize)	1	0	-425	0	0	0	1	0	-425	0	0	0
3	Melville ,J (Joalize)	1	1052.9	627.9	0	0	0	1	953.1	627.9	0	0	0
4	Gerber ,M (Michar)	1	0	-425	0	0	0	1	0	-425	0	0	0
4	Gerber ,M (Michar)	1	1320.5	895.5	0	0	0	1	1238.8	895.5	0	0	0
5	Moalusi ,P (Palesa)	1	0	-425	0	0	0	1	0	-425	0	0	0
5	Moalusi ,P (Palesa)	1	1288.3	863.3	0	0	0	1	1264	863.3	0	0	0
6	Venter ,C (Christopher)	1	1	425	0	0	0	1	1	425	0	0	0
6	Venter ,C (Christopher)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
7	Van Niekerk ,A (Adrian)	1	0	-425	0	0	0	1	0	-425	0	0	0
7	Van Niekerk ,A (Adrian)	1	1152.6	727.6	0	0	0	1	1124.8	727.6	0	0	0
8	Ahmed ,K (Konain)	1	0	-425	0	0	0	1	0	-425	0	0	0
8	Ahmed ,K (Konain)	1	1313.2	888.2	0	0	0	1	1291.7	888.2	0	0	0
9	Bodenstein ,D (Dian)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Bodenstein ,D (Dian)	1	1227.5	802.5	0	0	0	1	1213.9	802.5	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

Coertzen, W (Wihan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms