Player Page

Greef, J (Janus)
Dob: 2006/08/31 (U20)
Gender: Male
Chess SA id: 106060686
FIDE id:
Region: Johannesburg Metro (GJM)
Citizen: RSA
Title(s):
Last active: 2023/10/14 (209 days ago)
Ratings
Raw rating=Current rating, Weighted rating (WR)Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Curent Raw rating1404.1
Curent Weighted rating1401.0
Curent Weighted performance1257.9
Current official/published rating (highest between Raw, WR and WP)1404.1
Current floor (min rating allowed)916.3
Current highest rating achieved1416.3
Current K-factor32
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±124.0
Current Raw change used (final)0.0
Projected new Raw rating1404.1
Projected new Weighed rating1401.8
Projected new Weighted performance1257.9
Projected new official/published rating (highest between new Raw, new WR and new WP)1404.1
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1416.3
Projected new floor916.3
Projected new K-facor32
Raw rating=Current rating, Weighted rating (WR)Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Curent Raw rating1403.6
Curent Weighted rating1401.0
Curent Weighted performance1256.2
Current official/published rating (highest between Raw, WR and WP)1403.6
Current floor (min rating allowed)921.8
Current highest rating achieved1421.8
Current K-factor32
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±124.1
Current Raw change used (final)0.0
Projected new Raw rating1403.6
Projected new Weighed rating1401.9
Projected new Weighted performance1256.2
Projected new official/published rating (highest between new Raw, new WR and new WP)1403.6
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1421.8
Projected new floor921.8
Projected new K-facor32
Raw rating=Current rating, Weighted rating (WR)Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Curent Raw rating879.6
Curent Weighted rating841.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)879.6
Current floor (min rating allowed)500.0
Current highest rating achieved879.6
Current K-factor40
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±261.7
Current Raw change used (final)0.0
Projected new Raw rating879.6
Projected new Weighed rating844.8
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)879.6
Projected effective change (new Official - current Official)=0.0
Projected new highest rating879.6
Projected new floor500.0
Projected new K-facor40
Raw rating=Current rating, Weighted rating (WR)Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Curent Raw rating764.6
Curent Weighted rating764.6
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)764.6
Current floor (min rating allowed)500.0
Current highest rating achieved764.6
Current K-factor40
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±308.3
Current Raw change used (final)0.0
Projected new Raw rating764.6
Projected new Weighed rating764.6
Projected new Weighted performance
Projected new official/published rating (highest between new Raw, new WR and new WP)764.6
Projected effective change (new Official - current Official)=0.0
Projected new highest rating764.6
Projected new floor500.0
Projected new K-facor40
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
39 Paarl Boys High Chess Festival 2023 (Elite Division) 2023/10/13 2023/10/14 Cape Winelands (WCW) Standard 60 0.83 6 6 2.0 1416.3 1421.8 Analysis
38 D2 School League Finals 2023 (U19) 2023/07/22 2023/07/22 West Rand (GWR) Standard 60 0.83 5 5 4.0 1389.7 1389.8 Analysis
37 2022 South African Junior Team Chess Championships (U18 Open) 2022/12/04 2022/12/08 4 Knights (4K) Standard 120 1.00 7 7 2.5 1394.0 1392.7 Analysis
36 JMC 3rd Trials 2022 (B) 2022/09/11 2022/09/11 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1334.8 1310.9 Analysis
35 2022 Gauteng Schools Team Championships (U19 Open) 2022/08/26 2022/08/26 Tshwane (GTP) Standard 60 0.83 5 4 2.0 1360.2 1328.5 Analysis
34 D2 School League Finals 2022 (U18) 2022/08/20 2022/08/20 West Rand (GWR) Standard 60 0.83 5 5 2.0 1360.2 1328.5 Analysis
33 JNW Helpmekaar 2022 (Challengers) 2022/07/09 2022/07/09 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1381.1 1348.3 Analysis
32 2022 Gauteng Interregion (U16 Open) 2022/02/26 2022/02/26 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1272.0 1270.3 Analysis
31 JMC Charterhouse Open 2022 (B) 2022/02/12 2022/02/12 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1272.0 1270.3 Analysis
30 2021 Milos Ristic Open (C) 2021/10/09 2021/10/09 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1239.7 1228.9 Analysis
29 JMC Helpmekaar 2021 (U16) 2021/09/06 2021/09/06 Johannesburg Metro (GJM) Rapid 30 0.60 5 5 2.5 1227.2 764.6 Analysis
28 JNW Club - Trinityhouse Randpark Ridge Open 2020 (C) 2020/02/22 2020/02/22 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1162.9 1155.5 Analysis
27 2019 South African Junior Team Championships (U14B) 2020/01/04 2020/01/08 4 Knights (4K) Standard 120 1.00 7 7 0.5 1274.1 1268.5 Analysis
26 The Joburg Open 2019 (Masters) 2019/10/12 2019/10/12 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1265.2 1264.4 Analysis
25 GJM vs GE Inter Region 2019 (U14D) 2019/10/05 2019/10/05 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1265.2 1264.4 Analysis
24 The King`s Cup League - Stage 2 2019 (B) 2019/09/07 2019/09/07 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1241.5 1242.8 Analysis
23 2019 Gauteng School League Finals (U13 Open) 2019/08/23 2019/08/23 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1116.7 1122.1 Analysis
22 D2 League Finals 2019 (U13 Mix) 2019/08/03 2019/08/03 West Rand (GWR) Standard 60 0.83 7 6 5.0 1116.7 1122.1 Analysis
21 JNW Club - Helpmekaar Kollege Open 2019 (C) 2019/07/06 2019/07/06 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1110.7 1116.5 Analysis
20 Chess Heroes Junior Tournament 2019 (A) 2019/06/22 2019/06/22 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1057.2 1042.9 Analysis
12
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Standard All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Rapid All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 204 92 34 78 109.0 53.4 29.2 1158.3 1187.5
White 102 48 20 34 58.0 56.9 58.3 1189.8 1248.1
Black 102 44 14 44 51.0 50.0 0.0 1126.9 1126.9
Standard All 199 90 33 76 106.5 53.5 29.9 1153.9 1183.8
White 99 46 20 33 56.0 56.6 55.8 1186.7 1242.5
Black 100 44 13 43 50.5 50.5 4.3 1121.4 1125.7
Rapid All 5 2 1 2 2.5 50.0 0.0 1333.8 1333.8
White 3 2 0 1 2.0 66.7 141.7 1290.7 1432.4
Black 2 0 1 1 0.5 25.0 -212.5 1398.5 1186.0
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 106060687 Greef, S (Schalk) 4 2.5 1 3 0 62.5 1062.0 106.3 1168.2 View list
2 108073208 Steyn, T (Tjaart) 3 1.0 1 0 2 33.3 1098.0 -141.7 956.3 View list
3 106064421 Brandt, DW (Declan William) 3 0.5 0 1 2 16.7 1091.4 -283.3 808.0 View list
4 103064968 Steyn, C (Corne) 3 0.0 0 0 3 0.0 1064.4 -425.0 639.4 View list
5 208071873 Chinoruma, T (Tawana) 2 2.0 2 0 0 100.0 1094.2 425.0 1519.2 View list
6 204079859 Fauconier, C (Caley) 2 2.0 2 0 0 100.0 1008.3 425.0 1433.3 View list
7 106069421 Mofokeng, K (Kamohelo) 2 2.0 2 0 0 100.0 986.5 425.0 1411.5 View list
8 1110102387 Smith, Z (Zion) 2 2.0 2 0 0 100.0 1142.4 425.0 1567.4 View list
9 106092806 Chabangu, M (Mahlori) 2 1.0 1 0 1 50.0 919.7 0.0 919.7 View list
10 108073207 Horn, E (Evan) 2 1.0 1 0 1 50.0 1239.9 0.0 1239.9 View list
11 205048914 Shaw, A (Amy) 2 1.0 1 0 1 50.0 1021.5 0.0 1021.5 View list
12 106050282 Voigt, H (Heinrich) 2 1.0 0 2 0 50.0 1163.0 0.0 1163.0 View list
13 206091525 Nel, H (Hayley) 2 0.5 0 1 1 25.0 1106.5 -212.5 894.0 View list
14 108085070 Moustakis, C (Costa) 2 0.0 0 0 2 0.0 1078.0 -425.0 653.0 View list
15 209092675 Ramlall, S (Sanjana) 2 0.0 0 0 2 0.0 1067.3 -425.0 642.3 View list
16 106084365 Singh, N (Nimai) 2 0.0 0 0 2 0.0 907.0 -425.0 482.0 View list
17 105067554 Croukamp, MMC (Michael) 1 1.0 1 0 0 100.0 1389.7 425.0 1814.7 View list
18 106079487 Collins, JP (Johannes) 1 1.0 1 0 0 100.0 1116.7 425.0 1541.7 View list
19 106066125 Cloete, D (Daniel) 1 1.0 1 0 0 100.0 1106.9 425.0 1531.9 View list
20 1060100309 Ackerman, E (Ethan) 1 1.0 1 0 0 100.0 853.6 425.0 1278.6 View list