Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koch, S (Stefan)

Chess SA id

103086494

FIDE id

Date of birth

2003-11-01 (Adult)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-03-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1061.8	1056.2	532.8	532.8
Raw rating	1061.8	1056.2	532.8	532.8
Weighted rating	1061.8	1056.2	532.8	532.8
Weighted performance	241.2	243.4	0	0
Floor	616.6	619	500	500
K-factor	40	40	40	40
Min/Max rating change allowed	201.9	203.5	429	429
Highest rating	1200 2018-02-01	1200 2018-02-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1116.6 2020-01-01	1119 2020-01-01	532.8 2024-02-01	532.8 2024-02-01
Highest weighted rating	1116.6 2024-11-01	1119 2024-11-01	532.8 2024-11-01	532.8 2024-11-01
Highest weighted performance	1200 2018-02-01	1200 2018-02-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1061.8	1056.2	532.8	532.8
Analysis
Rating	1061.8	1056.2	532.8	532.8
Raw rating	1061.8	1056.2	532.8	532.8
Weighted rating	1061.8	1056.2	532.8
Weighted performance	241.2	243.4	0
K-factor	40	40	40	40
Floor	616.6	619	500	500
Max/Min rating change allowed	201.9	203.5	429	429
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	1061.8	1056.2	532.8	532.8
New weighted rating	1061.8	1056.2	532.8	532.8
New weighted performance	234.7	236.8	0	0
Temp new rating	1061.8	1056.2	532.8	532.8
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1061.8	1056.2	532.8	532.8
New K-factor	40	40	40	40
New floor	616.6	619	500	500

Item	Main	Standard
	0	0
	0	0
	0	0
	0	0
	0	0
	0	0
History	44	44

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	26	12	46.15	-32.7	1111.9	1079.2
Standard	26	12	46.15	-32.7	1111.9	1079.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1061.8	1056.2	532.8	532.8
2025-09-30	1061.8	1056.2	532.8	532.8
2025-09-01	1061.8	1056.2	532.8	532.8
2025-08-01	1061.8	1056.2	532.8	532.8
2025-07-01	1061.8	1056.2	532.8	532.8
2025-06-01	1061.8	1056.2	532.8	532.8
2025-05-01	1061.8	1056.2	532.8	532.8
2025-04-01	1061.8	1056.2	532.8	532.8
2025-03-01	1061.8	1056.2	532.8	532.8
2025-02-01	1061.8	1056.2	532.8	532.8
2025-01-01	1061.8	1056.2	532.8	532.8
2024-12-01	1061.8	1056.2	532.8	532.8
2024-11-01	1061.8	1056.2	532.8	532.8
2024-10-01	1061.8	1056.2	532.8	532.8
2024-09-01	1061.8	1056.2	532.8	532.8
2024-08-01	1061.8	1056.2	532.8	532.8
2024-07-01	1061.8	1056.2	532.8	532.8
2024-09-01	1061.8	1056.2	532.8	532.8
2024-05-01	1061.8	1056.2	532.8	532.8
2024-04-01	1061.8	1056.2	532.8	532.8
2024-03-01	1061.8	1056.2	532.8	532.8
2024-02-01	1061.8	1056.2	532.8	532.8
2024-01-01	1061.8	1056.2	532.8	532.8
2023-12-01	1061.8	1056.2	532.8	532.8

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	Hoerskool Drie Riviere 2020 (LSEN)	2020-03-07	2020-03-07	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
2	Eureka LSEN Skaak/Chess 2019 (A)	2019-10-09	2019-10-09	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
3	Eureka Chess Open 2019 (D LSEN)	2019-07-27	2019-07-27	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
4	Eureka Chess Open 2018 (B)	2018-09-29	2018-09-29	Standard	Sedibeng (GSV)	5	3	0	Yes	Analysis
5	Eureka Chess Open 2018 (G LSEN)	2018-09-29	2018-09-29	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	Word of Life Open 2018 (LSEN)	2018-05-12	2018-05-12	Standard	Sedibeng (GSV)	5	4	1.5	Yes	Analysis

#	Games	Start				End
1	3	Tournament Eureka LSEN Skaak/Chess 2019				Tournament Eureka LSEN Skaak/Chess 2019
		date 2019-10-09	rnd 3	type Standard	result 1	date 2019-10-09	rnd 5	type Standard	result 1
		Opponent Khonou, T (Thabo)				Opponent Mabaso, L (Lebohang)
2	3	Tournament Eureka Chess Open 2018				Tournament Eureka Chess Open 2018
		date 2018-09-29	rnd 3	type Standard	result 1	date 2018-09-29	rnd 5	type Standard	result 1
		Opponent Engelbrecht, J (Juan)				Opponent Tsundo, S (Siyabonga)
3	2	Tournament Eureka Chess Open 2019				Tournament Eureka LSEN Skaak/Chess 2019
		date 2019-07-27	rnd 5	type Standard	result 1	date 2019-10-09	rnd 1	type Standard	result 1
		Opponent Ndamse, O (Onebango)				Opponent Selatola, K (Khomotso)

#	Games	Start				End
1	3	Tournament Eureka LSEN Skaak/Chess 2019				Tournament Eureka LSEN Skaak/Chess 2019
		date 2019-10-09	rnd 3	type Standard	result 1	date 2019-10-09	rnd 5	type Standard	result 1
		Opponent Khonou, T (Thabo)				Opponent Mabaso, L (Lebohang)
2	3	Tournament Eureka Chess Open 2018				Tournament Eureka Chess Open 2018
		date 2018-09-29	rnd 3	type Standard	result 1	date 2018-09-29	rnd 5	type Standard	result 1
		Opponent Engelbrecht, J (Juan)				Opponent Tsundo, S (Siyabonga)
3	2	Tournament Eureka Chess Open 2019				Tournament Eureka LSEN Skaak/Chess 2019
		date 2019-07-27	rnd 5	type Standard	result 1	date 2019-10-09	rnd 1	type Standard	result 1
		Opponent Ndamse, O (Onebango)				Opponent Selatola, K (Khomotso)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Eureka Chess Open 2018				Tournament Eureka Chess Open 2018
		date 2018-09-29	rnd 3	type Standard	result 1	date 2018-09-29	rnd 5	type Standard	result 1
		Opponent Engelbrecht, J (Juan)				Opponent Tsundo, S (Siyabonga)
2	2	Tournament Eureka Chess Open 2019				Tournament Eureka LSEN Skaak/Chess 2019
		date 2019-07-27	rnd 5	type Standard	result 1	date 2019-10-09	rnd 1	type Standard	result 1
		Opponent Ndamse, O (Onebango)				Opponent Selatola, K (Khomotso)
3	2	Tournament Eureka Chess Open 2019				Tournament Eureka Chess Open 2019
		date 2019-07-27	rnd 2	type Standard	result 1	date 2019-07-27	rnd 3	type Standard	result 1
		Opponent Molebatsi, A (Alfred)				Opponent Mohoje, K (Kgotso)

#	Games	Start				End
1	3	Tournament Eureka Chess Open 2018				Tournament Eureka Chess Open 2018
		date 2018-09-29	rnd 3	type Standard	result 1	date 2018-09-29	rnd 5	type Standard	result 1
		Opponent Engelbrecht, J (Juan)				Opponent Tsundo, S (Siyabonga)
2	2	Tournament Eureka Chess Open 2019				Tournament Eureka LSEN Skaak/Chess 2019
		date 2019-07-27	rnd 5	type Standard	result 1	date 2019-10-09	rnd 1	type Standard	result 1
		Opponent Ndamse, O (Onebango)				Opponent Selatola, K (Khomotso)
3	2	Tournament Eureka Chess Open 2019				Tournament Eureka Chess Open 2019
		date 2019-07-27	rnd 2	type Standard	result 1	date 2019-07-27	rnd 3	type Standard	result 1
		Opponent Molebatsi, A (Alfred)				Opponent Mohoje, K (Kgotso)

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	Muller ,M (Mike)	2	0	-425	2	0	-425	0	0	0	0	0	0
1	Muller ,M (Mike)	2	969.5	544.5	2	957.8	544.5	0	0	0	0	0	0
2	Molefi ,K (Kagiso)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Molefi ,K (Kagiso)	1	1281.7	856.7	1	1298.4	856.7	0	0	0	0	0	0
3	Selatola ,K (Khomotso)	1	1	425	1	1	425	0	0	0	0	0	0
3	Selatola ,K (Khomotso)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Reinhardt ,J (Johannes)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Reinhardt ,J (Johannes)	1	1200	775	1	1200	775	0	0	0	0	0	0
5	Mataumg ,H (Hopeyell)	1	1	425	1	1	425	0	0	0	0	0	0
5	Mataumg ,H (Hopeyell)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Janse Van Rensburg ,J (Joshua)	1	1	425	1	1	425	0	0	0	0	0	0
6	Janse Van Rensburg ,J (Joshua)	1	836.9	1261.9	1	857.2	1261.9	0	0	0	0	0	0
7	Nxumalo ,S (Sanele)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Nxumalo ,S (Sanele)	1	580.3	155.3	1	592	155.3	0	0	0	0	0	0
8	Motaung ,A (Albert)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Motaung ,A (Albert)	1	1200	775	1	1200	775	0	0	0	0	0	0
9	Khumalo ,N (Nkosinathi)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Khumalo ,N (Nkosinathi)	1	1211.5	786.5	1	1231.6	786.5	0	0	0	0	0	0
10	Mohoje ,K (Kgotso)	1	1	425	1	1	425	0	0	0	0	0	0
10	Mohoje ,K (Kgotso)	1	1233.2	1658.2	1	1240	1658.2	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

Koch, S (Stefan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms