Player Page

Pretorius, JB (Johnny)
Dob: 2007/02/14 (U18)
Gender: Male
Chess SA id: 107057155
FIDE id:
Region: West Coast (WCU)
Citizen: RSA
Title(s):
Last active: 2021/05/08 (1114 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 rating1258.9
Curent Weighted rating1258.9
Curent Weighted performance697.4
Current official/published rating (highest between Raw, WR and WP)1258.9
Current floor (min rating allowed)758.9
Current highest rating achieved1258.9
Current K-factor36
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)±152.5
Current Raw change used (final)0.0
Projected new Raw rating1258.9
Projected new Weighed rating1258.9
Projected new Weighted performance697.4
Projected new official/published rating (highest between new Raw, new WR and new WP)1258.9
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1258.9
Projected new floor758.9
Projected new K-facor36
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 rating1226.4
Curent Weighted rating1226.4
Curent Weighted performance521.3
Current official/published rating (highest between Raw, WR and WP)1226.4
Current floor (min rating allowed)726.4
Current highest rating achieved1226.4
Current K-factor36
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)±159.7
Current Raw change used (final)0.0
Projected new Raw rating1226.4
Projected new Weighed rating1226.4
Projected new Weighted performance521.3
Projected new official/published rating (highest between new Raw, new WR and new WP)1226.4
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1226.4
Projected new floor726.4
Projected new K-facor36
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 rating1031.2
Curent Weighted rating1031.2
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1031.2
Current floor (min rating allowed)531.2
Current highest rating achieved1031.2
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)±210.9
Current Raw change used (final)0.0
Projected new Raw rating1031.2
Projected new Weighed rating1031.2
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1031.2
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1031.2
Projected new floor531.2
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 rating618.0
Curent Weighted rating618.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)618.0
Current floor (min rating allowed)531.2
Current highest rating achieved648.0
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)±380.0
Current Raw change used (final)0.0
Projected new Raw rating618.0
Projected new Weighed rating618.0
Projected new Weighted performance
Projected new official/published rating (highest between new Raw, new WR and new WP)618.0
Projected effective change (new Official - current Official)=0.0
Projected new highest rating648.0
Projected new floor531.2
Projected new K-facor40
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
13 Bo-Weskus Skole Skaak Prestige 2021 (O15 Seuns) 2021/05/08 2021/05/08 West Coast (WCU) Rapid 30 0.60 5 5 4.0 1231.9 926.4 Analysis
12 Olifantsrivier CC 2021 (Invitational) 2021/03/27 2021/03/27 West Coast (WCU) Rapid 25 0.54 7 7 3.0 1240.3 843.2 Analysis
11 West Coast Schools Prestige 2020 (U13 Boys) 2020/03/07 2020/03/07 West Coast (WCU) Rapid 30 0.60 5 5 3.0 1233.4 756.8 Analysis
10 Bo-Weskus Skole Prestige 2020 (O13 Seuns) 2020/02/15 2020/02/15 West Coast (WCU) Standard 60 0.83 6 6 5.0 1168.6 1126.8 Analysis
9 Western Cape Top Schools 2019 (U13 Mix) 2019/08/31 2019/09/01 Cape Winelands (WCW) Standard 60 0.83 5 5 2.0 1168.6 1118.8 Analysis
8 Check Mates 2019 (Open) 2019/08/17 2019/08/17 West Coast (WCU) Standard 70 0.87 6 6 3.0 1149.2 1083.6 Analysis
7 Waschklip Clinic Closed 2019 2019/06/18 2019/06/18 West Coast (WCU) Standard 60 0.83 5 5 1.0 1205.4 1162.4 Analysis
6 Western Cape Schools Individuals 2019 (U13 Boys) 2019/05/18 2019/05/19 Eden District (WEG) Standard 60 0.83 6 6 2.0 1240.1 1091.6 Analysis
5 West Coast Open 2019 (C) 2019/04/27 2019/04/27 West Coast (WCU) Standard 90 0.94 5 5 4.0 866.7 818.4 Analysis
4 Weskus Skole Prestige Skaak Kampioenskappe 2019 (O13 Seuns) 2019/03/02 2019/04/06 West Coast (WCU) Standard 60 0.83 6 6 4.0 866.7 818.4 Analysis
3 Bo-Weskus Skole Skaak Prestige 2019 (O13 Seuns) 2019/02/16 2019/02/16 West Coast (WCU) Rapid 30 0.60 7 6 3.5 787.0 618.0 Analysis
2 Western Cape Schools Individuals 2018 (U11 Boys) 2018/05/19 2018/05/20 Overberg (WOS) Standard 60 0.83 6 6 2.0 742.2 766.8 Analysis
1 West Coast Schools Prestige Individual Championship 2018 (U11 Boys) 2018/03/10 2018/03/24 West Coast (WCU) Standard 60 0.83 6 6 4.0 618.0 618.0 Analysis
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 74 40 1 33 40.5 54.7 40.2 1189.8 1230.0
White 36 17 1 18 17.5 48.6 -11.8 1188.8 1177.0
Black 38 23 0 15 23.0 60.5 89.5 1190.7 1280.2
Standard All 51 27 0 24 27.0 52.9 25.0 1185.1 1210.1
White 26 12 0 14 12.0 46.2 -32.7 1189.0 1156.3
Black 25 15 0 10 15.0 60.0 85.0 1181.1 1266.1
Rapid All 23 13 1 9 13.5 58.7 73.9 1200.0 1273.9
White 10 5 1 4 5.5 55.0 42.5 1188.1 1230.6
Black 13 8 0 5 8.0 61.5 98.1 1209.2 1307.3
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 1070099739 Muller, J (Jayden) 2 2.0 2 0 0 100.0 742.4 425.0 1167.3 View list
2 106078570 Hausiku, M (Marco) 2 1.0 1 0 1 50.0 1190.6 0.0 1190.6 View list
3 107078602 Joseph, R (Riaan) 2 1.0 1 0 1 50.0 977.8 0.0 977.8 View list
4 106090529 Saal, J (Junior) 2 1.0 1 0 1 50.0 826.9 0.0 826.9 View list
5 208078559 Van Zyl, M (Mea) 2 1.0 1 0 1 50.0 1008.0 0.0 1008.0 View list
6 2070112301 Athobe, X (Xesha) 1 1.0 1 0 0 100.0 866.7 425.0 1291.7 View list
7 1070110600 Andrew, K (Keenan) 1 1.0 1 0 0 100.0 1231.9 425.0 1656.9 View list
8 1070110154 Bester, Q (Q-Whine) 1 1.0 1 0 0 100.0 866.7 425.0 1291.7 View list
9 106068748 Cloete, H (Howard) 1 1.0 1 0 0 100.0 1231.9 425.0 1656.9 View list
10 107078598 Cloete, A (Alesundro) 1 1.0 1 0 0 100.0 1233.4 425.0 1658.4 View list
11 1070110597 Claassens, J (John) 1 1.0 1 0 0 100.0 787.0 425.0 1212.0 View list
12 1070099823 Botha, J (Joshua) 1 1.0 1 0 0 100.0 742.2 425.0 1167.2 View list
13 1070131869 Engelbrecht, R (Ryan) 1 1.0 1 0 0 100.0 1168.6 425.0 1593.6 View list
14 1090099730 Drennen, L (Liam) 1 1.0 1 0 0 100.0 1240.3 425.0 1665.3 View list
15 1070110569 Diergaardt, J (Jumaine) 1 1.0 1 0 0 100.0 1168.6 425.0 1593.6 View list
16 2060110565 Deiven, A (Angel) 1 1.0 1 0 0 100.0 787.0 425.0 1212.0 View list
17 108084101 De Wet, R (Rossouw) 1 1.0 1 0 0 100.0 742.2 425.0 1167.2 View list
18 205068708 Geldenhuys, M (Mar-Rochelle) 1 1.0 1 0 0 100.0 1149.2 425.0 1574.2 View list
19 1090105979 Huisamen, A (Albertus) 1 1.0 1 0 0 100.0 1240.3 425.0 1665.3 View list
20 1060110180 Klein, C (Calvin) 1 1.0 1 0 0 100.0 866.7 425.0 1291.7 View list