Chess South Africa Ratings Database

PLAYER PAGE

Personal

Sebyboe, J (Jo-Heiden)

Chess SA id

1120312517

FIDE id

Date of birth

2012-11-30 (U14)

Gender

Male

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-02

Personal details last changed

1900-01-01

Junior GPX Games

11.5

Junior GPX Points

1026.4

Item	Main	Standard	Rapid	Blitz
Rating	1198.4	1197.6	1199.9	1200
Raw rating	1192.2	1186.7	1199.9	1200
Weighted rating	1198.4	1197.6	1199.9	1200
Weighted performance	0	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	167.7	169	165.8	165.8
Highest rating	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01
Highest raw rating	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01
Highest weighted rating	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01
Highest weighted performance	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-0.6	-1	0	0
New rating	1197.9	1196.6	1199.9	1200
Analysis
Rating	1198.4	1197.6	1199.9	1200
Raw rating	1192.2	1186.7	1199.9	1200
Weighted rating	1198.4	1197.6	1199.9
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	167.7	169	165.8	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	1192.2	1186.7	1199.9	1200
New weighted rating	1197.9	1196.6	1199.9	1200
New weighted performance	0	0	0	0
Temp new rating	1197.9	1196.6	1199.9	1200
Temp new rating +/-	-0.6	-1	0	0
Final new rating +/-	-0.6	-1	0	0
New rating	1197.9	1196.6	1199.9	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard	Rapid
	0	0	0
	14	9	5
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	14	9	5

Games since
	Main 14	Standard 9		Rapid 5		Blitz 0
Gender	Male
Age group	U14
Region	Overberg (WOS)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	14	4	28.57	-182.1	1268.6	1086.5
Standard	9	2	22.22	-236.1	1302.5	1066.4
Rapid	5	2	40	-85	1207.5	1122.5
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	14	4	28.57	-182.1	1268.6	1086.5
Standard	9	2	22.22	-236.1	1302.5	1066.4
Rapid	5	2	40	-85	1207.5	1122.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1192.2	1186.7	1199.9	1200
2025-09-01	1192.2	1186.7	1199.9	1200
2025-08-01	1199.7	1199.6	1199.9	1200
2025-07-01	1199.7	1199.6	1199.9	1200
2025-06-01	1199.7	1199.6	1199.9	1200
2025-05-01	1199.5	1199.4	1199.9	1200
2025-04-01	1197.2	1196	1199.8	1200
2025-03-01	1199.1	1200	1198.8	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200
2023-11-01	1200	1200	1200	1200

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	Overberg Top Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Overberg (WOS)	5	4	1	Yes	Analysis
2	Overberg Schools - PS Closed 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Overberg (WOS)	5	5	1	Yes	Analysis
3	Overberg Schools - PS Trials (Region 2) 2025 (U13)	2025-02-15	2025-02-15	Rapid	Overberg (WOS)	6	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Overberg Top Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Overberg (WOS)	5	4	1	Yes	Analysis
2	Overberg Schools - PS Closed 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Overberg (WOS)	5	5	1	Yes	Analysis
3	Overberg Schools - PS Trials (Region 2) 2025 (U13)	2025-02-15	2025-02-15	Rapid	Overberg (WOS)	6	5	2	Yes	Analysis
4	Overberg October Chess Festival 2024 (A)	2024-10-17	2024-10-17	Blitz	Overberg (WOS)	5	0	0	No	Analysis

#	Games	Start				End
1	2	Tournament Overberg Schools - PS Trials (Region 2) 2025				Tournament Overberg Schools - PS Trials (Region 2) 2025
		date 2025-02-15	rnd 2	type Rapid	result 1	date 2025-02-15	rnd 3	type Rapid	result 1
		Opponent Pekeur, M (Mercia-Lee)				Opponent Philander, C (Clarecia)
2	1	Tournament Overberg Top Schools 2025				Tournament Overberg Top Schools 2025
		date 2025-08-02	rnd 3	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Terblanche, Z (Zanna)				Opponent Terblanche, Z (Zanna)
3	1	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Lotz, R (Renaldo)				Opponent Lotz, R (Renaldo)

#	Games	Start				End
1	1	Tournament Overberg Top Schools 2025				Tournament Overberg Top Schools 2025
		date 2025-08-02	rnd 3	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Terblanche, Z (Zanna)				Opponent Terblanche, Z (Zanna)
2	1	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Lotz, R (Renaldo)				Opponent Lotz, R (Renaldo)

#	Games	Start				End
1	2	Tournament Overberg Schools - PS Trials (Region 2) 2025				Tournament Overberg Schools - PS Trials (Region 2) 2025
		date 2025-02-15	rnd 2	type Rapid	result 1	date 2025-02-15	rnd 3	type Rapid	result 1
		Opponent Pekeur, M (Mercia-Lee)				Opponent Philander, C (Clarecia)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Overberg Schools - PS Trials (Region 2) 2025				Tournament Overberg Schools - PS Trials (Region 2) 2025
		date 2025-02-15	rnd 2	type Rapid	result 1	date 2025-02-15	rnd 3	type Rapid	result 1
		Opponent Pekeur, M (Mercia-Lee)				Opponent Philander, C (Clarecia)
2	1	Tournament Overberg Top Schools 2025				Tournament Overberg Top Schools 2025
		date 2025-08-02	rnd 3	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Terblanche, Z (Zanna)				Opponent Terblanche, Z (Zanna)
3	1	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Lotz, R (Renaldo)				Opponent Lotz, R (Renaldo)

#	Games	Start				End
1	1	Tournament Overberg Top Schools 2025				Tournament Overberg Top Schools 2025
		date 2025-08-02	rnd 3	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Terblanche, Z (Zanna)				Opponent Terblanche, Z (Zanna)
2	1	Tournament Overberg Schools - PS Closed 2025				Tournament Overberg Schools - PS Closed 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Lotz, R (Renaldo)				Opponent Lotz, R (Renaldo)

#	Games	Start				End
1	2	Tournament Overberg Schools - PS Trials (Region 2) 2025				Tournament Overberg Schools - PS Trials (Region 2) 2025
		date 2025-02-15	rnd 2	type Rapid	result 1	date 2025-02-15	rnd 3	type Rapid	result 1
		Opponent Pekeur, M (Mercia-Lee)				Opponent Philander, C (Clarecia)

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	Ellis ,H (Hanru)	2	0	-425	1	0	-425	1	0	-425	0	0	0
1	Ellis ,H (Hanru)	2	1192.7	767.7	1	1157.6	767.7	1	1200	767.7	0	0	0
2	Olivier ,D (Dian)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Olivier ,D (Dian)	1	1375.2	950.2	1	1355.6	950.2	0	0	0	0	0	0
3	Uys ,E (Eli)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Uys ,E (Eli)	1	1305.5	880.5	1	1264.9	880.5	0	0	0	0	0	0
4	Booysen ,J (Joshua)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Booysen ,J (Joshua)	1	1326.1	901.1	1	1265.9	901.1	0	0	0	0	0	0
5	Van Der Westhuizen ,M (Mika)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Van Der Westhuizen ,M (Mika)	1	1523.8	1098.8	1	1520.3	1098.8	0	0	0	0	0	0
6	Terblanche ,Z (Zanna)	1	1	425	1	1	425	0	0	0	0	0	0
6	Terblanche ,Z (Zanna)	1	1217.5	1642.5	1	1208.5	1642.5	0	0	0	0	0	0
7	Groenewald ,C (Christiaan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Groenewald ,C (Christiaan)	1	1302.1	877.1	1	1286.1	877.1	0	0	0	0	0	0
8	Lotz ,R (Renaldo)	1	1	425	1	1	425	0	0	0	0	0	0
8	Lotz ,R (Renaldo)	1	1193.7	1618.7	1	1174.3	1618.7	0	0	0	0	0	0
9	Schraader ,R (Ruben)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Schraader ,R (Ruben)	1	1258.1	833.1	1	1184	833.1	0	0	0	0	0	0
10	Philander ,C (Clarecia)	1	1	425	0	0	0	1	1	425	0	0	0
10	Philander ,C (Clarecia)	1	1200	1625	0	0	0	1	1200	1625	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Sebyboe, J (Jo-Heiden)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms