Chess South Africa Ratings Database

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Personal

Greef, J (Janus)

Chess SA id

106060686

FIDE id

Date of birth

2006-08-31 (U20)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-10-05

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1399.5	1397.6	879.6	764.6
Raw rating	1399.5	1397.6	879.6	764.6
Weighted rating	1398.6	1396.3	879	764.6
Weighted performance	1049.7	1042.6	0	0
Floor	916.3	921.8	500	500
K-factor	32	32	40	40
Min/Max rating change allowed	124.8	125.1	261.8	308.3
Highest rating	1416.3 2023-10-01	1421.8 2023-10-01	1200 2019-12-01	1200 2024-02-01
Highest raw rating	1416.3 2023-10-01	1421.8 2023-10-01	879.6 2024-02-01	764.6 2024-02-01
Highest weighted rating	1416.3 2024-10-01	1421.8 2024-10-01	879.6 2024-11-01	764.6 2024-11-01
Highest weighted performance	1408.6 2022-09-01	1407.3 2022-09-01	1200 2019-12-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1399.5	1397.6	879.6	764.6
Analysis
Rating	1399.5	1397.6	879.6	764.6
Raw rating	1399.5	1397.6	879.6	764.6
Weighted rating	1398.6	1396.3	879
Weighted performance	1049.7	1042.6	0
K-factor	32	32	40	40
Floor	916.3	921.8	500	500
Max/Min rating change allowed	124.8	125.1	261.8	308.3
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	1399.5	1397.6	879.6	764.6
New weighted rating	1398.6	1396.3	879.4	764.6
New weighted performance	1049.2	1042.2	0	0
Temp new rating	1399.5	1397.6	879.6	764.6
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1399.5	1397.6	879.6	764.6
New K-factor	32	32	40	40
New floor	916.3	921.8	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	6	6	0
	11	11	0
	36	36	0
	10	5	5
History	362	345	17

Games since
	Main 12	Standard 12		Rapid 0		Blitz 0
Gender	Male
Age group	U20
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
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	210	110	52.38	20.2	1169.3	1189.5
Standard	205	107.5	52.44	20.7	1165.2	1186
Rapid	5	2.5	50	0	1333.8	1333.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1399.5	1397.6	879.6	764.6
2025-09-01	1399.5	1397.6	879.6	764.6
2025-08-01	1399.5	1397.6	879.6	764.6
2025-07-01	1399.5	1397.6	879.6	764.6
2025-06-01	1399.5	1397.6	879.6	764.6
2025-05-01	1399.5	1397.6	879.6	764.6
2025-04-01	1399.5	1397.6	879.6	764.6
2025-03-01	1399.5	1397.6	879.6	764.6
2025-02-01	1398.1	1395.6	879.6	764.6
2025-01-01	1376.7	1366.2	879.6	764.6
2024-12-01	1376.7	1366.2	879.6	764.6
2024-11-01	1404.1	1403.6	879.6	764.6
2024-10-01	1404.1	1403.6	879.6	764.6
2024-09-01	1404.1	1403.6	879.6	764.6
2024-08-01	1404.1	1403.6	879.6	764.6
2024-07-01	1404.1	1403.6	879.6	764.6
2024-06-01	1404.1	1403.6	879.6	764.6
2024-08-01	1404.1	1403.6	879.6	764.6
2024-04-01	1404.1	1403.6	879.6	764.6
2024-03-01	1404.1	1403.6	879.6	764.6
2024-02-01	1404.1	1403.6	879.6	764.6
2024-01-01	1404.1	1403.6	879.6	764.6
2023-12-01	1404.1	1403.6	818.6	764.6
2023-11-01	1404.1	1403.6	818.6	764.6

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	Paarl Boys' High Chess Festival 2024 (Elite)	2024-10-04	2024-10-05	Standard	Cape Winelands (WCW)	6	6	1	Yes	Analysis
2	Paarl Boys High Chess Festival 2023 (Elite Division)	2023-10-13	2023-10-14	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis
3	D2 School League Finals 2023 (U19)	2023-07-22	2023-07-22	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
4	2022 South African Junior Team Chess Championships (U18 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
5	JMC 3rd Trials 2022 (B)	2022-09-11	2022-09-11	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
6	D2 School League Finals 2022 (U18)	2022-08-20	2022-08-20	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
7	2022 Gauteng Schools Team Championships (U19 Open)	2022-08-26	2022-08-26	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
8	JNW Helpmekaar 2022 (Challengers)	2022-07-09	2022-07-09	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
9	2022 Gauteng Interregion (U16 Open)	2022-02-26	2022-02-26	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
10	JMC Charterhouse Open 2022 (B)	2022-02-12	2022-02-12	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
11	2021 Milos Ristic Open (C)	2021-10-09	2021-10-09	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
12	JMC Helpmekaar 2021 (U16)	2021-09-06	2021-09-06	Rapid	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
13	JNW Club - Trinityhouse Randpark Ridge Open 2020 (C)	2020-02-22	2020-02-22	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
14	2019 South African Junior Team Championships (U14B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	0.5	Yes	Analysis
15	The Joburg Open 2019 (Masters)	2019-10-12	2019-10-12	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
16	GJM vs GE Inter Region 2019 (U14D)	2019-10-05	2019-10-05	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
17	The King`s Cup League - Stage 2 2019 (B)	2019-09-07	2019-09-07	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
18	D2 League Finals 2019 (U13 Mix)	2019-08-03	2019-08-03	Standard	West Rand (GWR)	7	6	5	Yes	Analysis
19	2019 Gauteng School League Finals (U13 Open)	2019-08-23	2019-08-23	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
20	JNW Club - Helpmekaar Kollege Open 2019 (C)	2019-07-06	2019-07-06	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
21	Fonties Challange 2019 (U13)	2019-06-08	2019-06-08	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
22	Chess Heroes Junior Tournament 2019 (A)	2019-06-22	2019-06-22	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
23	JNW Club - Bryanston Open 2 2019 (C)	2019-05-11	2019-05-11	Standard	Johannesburg Metro (GJM)	5	4	0.5	Yes	Analysis
24	2019 Chris Greyling (C)	2019-04-27	2019-04-27	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
25	JNW Club - Charterhouse Open 2019 (C)	2019-04-13	2019-04-13	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
26	JNW Club - Trinityhouse Little Falls Open 2019 (C)	2019-02-23	2019-02-23	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
27	JNW Club - Bryanston Open 1 2019 (B)	2019-01-26	2019-01-26	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
28	2018 Tshwane Inter Region (U14D)	2018-12-01	2018-12-01	Standard	Cape Town (WCT)	5	5	2.5	Yes	Analysis
29	South African Junior Team Championships 2018 (U14B)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis
30	Inter Region GE vs JHB Metro 2018 (U14C)	2018-10-06	2018-10-06	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
31	2018 Gauteng League Final (U13)	2018-08-24	2018-08-24	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
32	JNW Club - Maragon Open 2018 (C)	2018-08-04	2018-08-04	Standard	Johannesburg Metro (GJM)	5	4	2.5	Yes	Analysis
33	JHB Metro Junior Closed 2018 (U14)	2018-07-28	2018-07-29	Standard	Johannesburg Metro (GJM)	6	6	3.5	Yes	Analysis
34	JNW Club - Bryanston Open 2 2018 (C)	2018-05-05	2018-05-05	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
35	JNW Club - Linden Open 2018 (C)	2018-04-14	2018-04-14	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
36	Fonties Challenge 2018 (U13+U15)	2018-04-21	2018-04-21	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
37	2018 Waterkloof Open (C)	2018-03-03	2018-03-04	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
38	2018 Constantia Park Open (D)	2018-02-10	2018-02-10	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
39	JNW Club - Trinityhouse Little Falls Open 2018 (C)	2018-02-16	2018-02-17	Standard	Johannesburg Metro (GJM)	6	6	3.5	Yes	Analysis
40	South African Junior Team Championships 2017 (U12C)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	5.5	Yes	Analysis

#	Games	Start				End
1	7	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-26	rnd 3	type Standard	result 0.5	date 2022-09-11	rnd 4	type Standard	result 1
		Opponent Mduduzi, J (Jiwa)				Opponent Chinoruma, T (Tawana)
2	6	Tournament JNW Club - Maragon Open 2018				Tournament 2018 Gauteng League Final
		date 2018-08-04	rnd 3	type Standard	result 1	date 2018-08-24	rnd 3	type Standard	result 1
		Opponent Mofokeng, K (Kamohelo)				Opponent Sikhonde, C (Chichima)
3	5	Tournament 2022 Gauteng Interregion				Tournament JNW Helpmekaar 2022
		date 2022-02-26	rnd 3	type Standard	result 1	date 2022-07-09	rnd 2	type Standard	result 1
		Opponent Valoi, G (Gina)				Opponent Strydom, A (Aydan)

#	Games	Start				End
1	7	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-26	rnd 3	type Standard	result 0.5	date 2022-09-11	rnd 4	type Standard	result 1
		Opponent Mduduzi, J (Jiwa)				Opponent Chinoruma, T (Tawana)
2	6	Tournament JNW Club - Maragon Open 2018				Tournament 2018 Gauteng League Final
		date 2018-08-04	rnd 3	type Standard	result 1	date 2018-08-24	rnd 3	type Standard	result 1
		Opponent Mofokeng, K (Kamohelo)				Opponent Sikhonde, C (Chichima)
3	5	Tournament 2022 Gauteng Interregion				Tournament JNW Helpmekaar 2022
		date 2022-02-26	rnd 3	type Standard	result 1	date 2022-07-09	rnd 2	type Standard	result 1
		Opponent Valoi, G (Gina)				Opponent Strydom, A (Aydan)

#	Games	Start				End
1	3	Tournament JMC Helpmekaar 2021				Tournament JMC Helpmekaar 2021
		date 2021-09-06	rnd 2	type Rapid	result 1	date 2021-09-06	rnd 4	type Rapid	result 1
		Opponent Sakhare, S (Soham)				Opponent Donald, J (Joshua)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-26	rnd 5	type Standard	result 1	date 2022-09-11	rnd 4	type Standard	result 1
		Opponent Lodi, N (Neo)				Opponent Chinoruma, T (Tawana)
2	5	Tournament South African Junior Team Championships 2017				Tournament 2018 Constantia Park Open
		date 2018-01-05	rnd 4	type Standard	result 1	date 2018-02-10	rnd 1	type Standard	result 1
		Opponent Padayachee, K (Kiegan)				Opponent Lotter, AJ (Albertus Johannes)
3	4	Tournament D2 School League Finals 2023				Tournament Paarl Boys High Chess Festival 2023
		date 2023-07-22	rnd 3	type Standard	result 1	date 2023-10-13	rnd 1	type Standard	result 1
		Opponent Mkhabela, S (Sifiso)				Opponent Van Niekerk, J (Jacobus)

#	Games	Start				End
1	5	Tournament 2022 Gauteng Schools Team Championships				Tournament JMC 3rd Trials 2022
		date 2022-08-26	rnd 5	type Standard	result 1	date 2022-09-11	rnd 4	type Standard	result 1
		Opponent Lodi, N (Neo)				Opponent Chinoruma, T (Tawana)
2	5	Tournament South African Junior Team Championships 2017				Tournament 2018 Constantia Park Open
		date 2018-01-05	rnd 4	type Standard	result 1	date 2018-02-10	rnd 1	type Standard	result 1
		Opponent Padayachee, K (Kiegan)				Opponent Lotter, AJ (Albertus Johannes)
3	4	Tournament D2 School League Finals 2023				Tournament Paarl Boys High Chess Festival 2023
		date 2023-07-22	rnd 3	type Standard	result 1	date 2023-10-13	rnd 1	type Standard	result 1
		Opponent Mkhabela, S (Sifiso)				Opponent Van Niekerk, J (Jacobus)

#	Games	Start				End
1	1	Tournament JMC Helpmekaar 2021				Tournament JMC Helpmekaar 2021
		date 2021-09-06	rnd 4	type Rapid	result 1	date 2021-09-06	rnd 4	type Rapid	result 1
		Opponent Donald, J (Joshua)				Opponent Donald, J (Joshua)
2	1	Tournament JMC Helpmekaar 2021				Tournament JMC Helpmekaar 2021
		date 2021-09-06	rnd 2	type Rapid	result 1	date 2021-09-06	rnd 2	type Rapid	result 1
		Opponent Sakhare, S (Soham)				Opponent Sakhare, S (Soham)

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	Greef ,S (Schalk)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
1	Greef ,S (Schalk)	4	1193.2	1299.4	4	1196.2	1299.4	0	0	0	0	0	0
2	Steyn ,C (Corne)	3	0	-425	3	0	-425	0	0	0	0	0	0
2	Steyn ,C (Corne)	3	1027.4	602.4	3	1031.9	602.4	0	0	0	0	0	0
3	Steyn ,T (Tjaart)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
3	Steyn ,T (Tjaart)	3	1216.8	1075.1	3	1210	1075.1	0	0	0	0	0	0
4	Brandt ,DW (Declan William)	3	0.5	-283.3	2	0.5	-212.5	1	0	-425	0	0	0
4	Brandt ,DW (Declan William)	3	1291.9	1008.6	2	1173.8	1079.4	1	1027.4	866.9	0	0	0
5	Smith ,Z (Zion)	2	2	425	2	2	425	0	0	0	0	0	0
5	Smith ,Z (Zion)	2	1332.8	1757.8	2	1319.2	1757.8	0	0	0	0	0	0
6	Geyser ,K (Kobus)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Geyser ,K (Kobus)	2	1712.2	1287.2	2	1689.1	1287.2	0	0	0	0	0	0
7	Ramlall ,S (Sanjana)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Ramlall ,S (Sanjana)	2	1252.1	827.1	2	1280.1	827.1	0	0	0	0	0	0
8	Fauconier ,C (Caley)	2	2	425	2	2	425	0	0	0	0	0	0
8	Fauconier ,C (Caley)	2	975.7	1400.7	2	978.5	1400.7	0	0	0	0	0	0
9	Singh ,N (Nimai)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Singh ,N (Nimai)	2	1041.7	616.7	2	1047.8	616.7	0	0	0	0	0	0
10	Slabber ,P (Pieter)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
10	Slabber ,P (Pieter)	2	1395.6	1608.1	2	1391.8	1608.1	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Greef, J (Janus)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms