Chess South Africa Ratings Database

PLAYER PAGE

Personal

Posthumus, J (Jan)

Chess SA id

1950147710

FIDE id

Date of birth

1995-07-23 (Adult)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2022-12-18

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1164	1194.8	1096.4	1300
Raw rating	1164	1194.8	1096.4	1300
Weighted rating	1164	1194.8	1096.4	1299
Weighted performance	0	0	0	0
Floor	700	700	700	800
K-factor	36	36	36	36
Min/Max rating change allowed	174.5	167	192.2	143.8
Highest rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1300 2024-02-01
Highest raw rating	1200 2020-01-01	1200 2020-01-01	1200 2020-01-01	1300 2024-02-01
Highest weighted rating	1200 2018-10-01	1200 2018-10-01	1200 2018-10-01	1296.7 2025-08-01
Highest weighted performance	1200 2020-01-01	1200 2020-01-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1164	1194.8	1096.4	1300
Analysis
Rating	1164	1194.8	1096.4	1300
Raw rating	1164	1194.8	1096.4	1300
Weighted rating	1164	1194.8	1096.4
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	800
Max/Min rating change allowed	174.5	167	192.2	143.8
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	1164	1194.8	1096.4	1300
New weighted rating	1164	1194.8	1096.4	1299.7
New weighted performance	0	0	0	0
Temp new rating	1164	1194.8	1096.4	1300
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1164	1194.8	1096.4	1300
New K-factor	36	36	36	36
New floor	700	700	700	800

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	13	3	10
	0	0	0
History	13	3	10

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Cape Town (WCT)
Province	Western Cape (WC)
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	13	4	30.77	-163.5	1258.8	1095.4
Standard	3	1	33.33	-141.7	1374.2	1232.5
Rapid	10	3	30	-170	1224.2	1054.2
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1164	1194.8	1096.4	1300
2025-09-01	1164	1194.8	1096.4	1300
2025-08-01	1164	1194.8	1096.4	1300
2025-07-01	1164	1194.8	1096.4	1300
2025-06-01	1164	1194.8	1096.4	1300
2025-05-01	1164	1194.8	1096.4	1300
2025-04-01	1164	1194.8	1096.4	1300
2025-03-01	1164	1194.8	1096.4	1300
2025-02-01	1164	1194.8	1096.4	1300
2025-01-01	1164	1194.8	1096.4	1300
2024-12-01	1164	1194.8	1096.4	1300
2024-11-01	1164	1194.8	1096.4	1300
2024-10-01	1164	1194.8	1096.4	1300
2024-09-01	1164	1194.8	1096.4	1300
2024-08-01	1164	1194.8	1096.4	1300
2024-07-01	1164	1194.8	1096.4	1300
2024-06-01	1164	1194.8	1096.4	1300
2024-08-01	1164	1194.8	1096.4	1300
2024-04-01	1164	1194.8	1096.4	1300
2024-03-01	1164	1194.8	1096.4	1300
2024-02-01	1164	1194.8	1096.4	1300
2024-01-01	1164	1194.8	1096.4	1300
2023-12-01	1164	1194.8	1096.4	1200
2023-11-01	1164	1194.8	1096.4	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	Kraaifontein Open 2022 (Intermediate)	2022-12-17	2022-12-18	Standard	Cape Town (WCT)	6	3	1	Yes	Analysis
2	Kraaifontein Rapid Open 2022 (Open)	2022-12-16	2022-12-16	Rapid	Cape Town (WCT)	6	5	1	Yes	Analysis
3	Kenridge Rapid 2022 (B)	2022-11-05	2022-11-05	Rapid	Cape Town (WCT)	6	5	2	Yes	Analysis

#	Games	Start				End
1	2	Tournament Kenridge Rapid 2022				Tournament Kenridge Rapid 2022
		date 2022-11-05	rnd 5	type Rapid	result 1	date 2022-11-05	rnd 6	type Rapid	result 1
		Opponent Strydom, B (Barry)				Opponent Osborne, N (Nicole)
2	1	Tournament Kraaifontein Open 2022				Tournament Kraaifontein Open 2022
		date 2022-12-17	rnd 2	type Standard	result 1	date 2022-12-17	rnd 2	type Standard	result 1
		Opponent Ngidi, N (Ndumiso)				Opponent Ngidi, N (Ndumiso)
3	1	Tournament Kraaifontein Rapid Open 2022				Tournament Kraaifontein Rapid Open 2022
		date 2022-12-16	rnd 2	type Rapid	result 1	date 2022-12-16	rnd 2	type Rapid	result 1
		Opponent Brink, K (Kiran)				Opponent Brink, K (Kiran)

#	Games	Start				End
1	1	Tournament Kraaifontein Open 2022				Tournament Kraaifontein Open 2022
		date 2022-12-17	rnd 2	type Standard	result 1	date 2022-12-17	rnd 2	type Standard	result 1
		Opponent Ngidi, N (Ndumiso)				Opponent Ngidi, N (Ndumiso)

#	Games	Start				End
1	2	Tournament Kenridge Rapid 2022				Tournament Kenridge Rapid 2022
		date 2022-11-05	rnd 5	type Rapid	result 1	date 2022-11-05	rnd 6	type Rapid	result 1
		Opponent Strydom, B (Barry)				Opponent Osborne, N (Nicole)
2	1	Tournament Kraaifontein Rapid Open 2022				Tournament Kraaifontein Rapid Open 2022
		date 2022-12-16	rnd 2	type Rapid	result 1	date 2022-12-16	rnd 2	type Rapid	result 1
		Opponent Brink, K (Kiran)				Opponent Brink, K (Kiran)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Kenridge Rapid 2022				Tournament Kenridge Rapid 2022
		date 2022-11-05	rnd 5	type Rapid	result 1	date 2022-11-05	rnd 6	type Rapid	result 1
		Opponent Strydom, B (Barry)				Opponent Osborne, N (Nicole)
2	1	Tournament Kraaifontein Open 2022				Tournament Kraaifontein Open 2022
		date 2022-12-17	rnd 2	type Standard	result 1	date 2022-12-17	rnd 2	type Standard	result 1
		Opponent Ngidi, N (Ndumiso)				Opponent Ngidi, N (Ndumiso)
3	1	Tournament Kraaifontein Rapid Open 2022				Tournament Kraaifontein Rapid Open 2022
		date 2022-12-16	rnd 2	type Rapid	result 1	date 2022-12-16	rnd 2	type Rapid	result 1
		Opponent Brink, K (Kiran)				Opponent Brink, K (Kiran)

#	Games	Start				End
1	1	Tournament Kraaifontein Open 2022				Tournament Kraaifontein Open 2022
		date 2022-12-17	rnd 2	type Standard	result 1	date 2022-12-17	rnd 2	type Standard	result 1
		Opponent Ngidi, N (Ndumiso)				Opponent Ngidi, N (Ndumiso)

#	Games	Start				End
1	2	Tournament Kenridge Rapid 2022				Tournament Kenridge Rapid 2022
		date 2022-11-05	rnd 5	type Rapid	result 1	date 2022-11-05	rnd 6	type Rapid	result 1
		Opponent Strydom, B (Barry)				Opponent Osborne, N (Nicole)
2	1	Tournament Kraaifontein Rapid Open 2022				Tournament Kraaifontein Rapid Open 2022
		date 2022-12-16	rnd 2	type Rapid	result 1	date 2022-12-16	rnd 2	type Rapid	result 1
		Opponent Brink, K (Kiran)				Opponent Brink, K (Kiran)

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	Mizen ,D (Daniel)	2	0	-425	0	0	0	2	0	-425	0	0	0
1	Mizen ,D (Daniel)	2	1251.6	826.6	0	0	0	2	1129.4	826.6	0	0	0
2	Ngidi ,N (Ndumiso)	1	1	425	1	1	425	0	0	0	0	0	0
2	Ngidi ,N (Ndumiso)	1	1274.4	1699.4	1	1252.8	1699.4	0	0	0	0	0	0
3	Guo ,A (Aleks)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Guo ,A (Aleks)	1	1399.9	974.9	1	1302.7	974.9	0	0	0	0	0	0
4	Stern ,M (Mason)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Stern ,M (Mason)	1	1448.2	1023.2	1	1395.4	1023.2	0	0	0	0	0	0
5	Van Staden ,J (Julian)	1	0	-425	0	0	0	1	0	-425	0	0	0
5	Van Staden ,J (Julian)	1	1200	775	0	0	0	1	1200	775	0	0	0
6	Louw ,J (Jean-Francois)	1	0	-425	0	0	0	1	0	-425	0	0	0
6	Louw ,J (Jean-Francois)	1	1196.6	771.6	0	0	0	1	1134.8	771.6	0	0	0
7	Osborne ,N (Nicole)	1	1	425	0	0	0	1	1	425	0	0	0
7	Osborne ,N (Nicole)	1	1286.9	1711.9	0	0	0	1	1062.4	1711.9	0	0	0
8	Brink ,K (Kiran)	1	1	425	0	0	0	1	1	425	0	0	0
8	Brink ,K (Kiran)	1	1200	1625	0	0	0	1	1200	1625	0	0	0
9	Hayward ,C (Catherine)	1	0	-425	0	0	0	1	0	-425	0	0	0
9	Hayward ,C (Catherine)	1	1200	775	0	0	0	1	1200	775	0	0	0
10	Lee ,MJ (Muhammad)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Lee ,MJ (Muhammad)	1	1242.7	817.7	0	0	0	1	829.2	817.7	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Posthumus, J (Jan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms