Player Page

Pretorius, S (Sonya)
Dob: 2009/03/02 (U16)
Gender: Female
Chess SA id: 2090132122
FIDE id:
Region: Cape Town (WCT)
Citizen: RSA
Title(s):
Last active: 2023/04/22 (434 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
Current Raw rating1123.6
Current Weighted rating1129.8
Current Weighted performance672.5
Current official/published rating (highest between Raw, WR and WP)1129.8
Current highest rating achieved1185.1
Current floor (min rating allowed)685.1
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)±184.9
Current Raw change used (final)0.0
Projected new Raw rating1123.6
Projected new Weighed rating1038.6
Projected new Weighted performance672.5
Projected new final Raw rating (if new WP > new Raw)1123.6
Projected new highest rating1185.1
Projected new floor685.1
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1123.6
Projected effective change (new Official - current Official)-6.2
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
Current Raw rating1172.8
Current Weighted rating1172.8
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1172.8
Current highest rating achieved1172.8
Current floor (min rating allowed)672.8
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)±172.4
Current Raw change used (final)0.0
Projected new Raw rating1172.8
Projected new Weighed rating1079.0
Projected new Weighted performance166.1
Projected new final Raw rating (if new WP > new Raw)1172.8
Projected new highest rating1172.8
Projected new floor672.8
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1172.8
Projected effective change (new Official - current Official)=0.0
s
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
Current Raw rating1076.8
Current Weighted rating1091.5
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1091.5
Current highest rating achieved1180.8
Current floor (min rating allowed)680.8
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)±197.6
Current Raw change used (final)0.0
Projected new Raw rating1076.8
Projected new Weighed rating1002.4
Projected new Weighted performance673.6
Projected new final Raw rating (if new WP > new Raw)1076.8
Projected new highest rating1180.8
Projected new floor680.8
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1076.8
Projected effective change (new Official - current Official)-14.7
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
Current Raw rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
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)±165.8
Current Raw change used (final)0.0
Projected new Raw rating1200.0
Projected new Weighed rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1200.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
5 Hermanus Rapid 2023 (B) 2023/04/22 2023/04/22 Overberg (WOS) Rapid 25 0.54 6 5 0.0 1162.0 1165.2 Analysis
4 Overberg Schools Open Tournament 2023 (U14) 2023/02/11 2023/02/11 Overberg (WOS) Rapid 20 0.47 5 5 2.0 1166.5 1180.8 Analysis
3 2020 Western Province Open (Development) 2020/03/07 2020/03/07 Cape Town (WCT) Standard 60 0.83 5 5 2.0 1185.1 1200.0 Analysis
2 2020 Welgemoed Chess Challenge (U12) 2020/02/29 2020/02/29 Cape Town (WCT) Rapid 30 0.60 5 5 3.0 1200.0 1200.0 Analysis
1 Cape Winelands Schools Trials 1 2020 (U11 Girls) 2020/02/08 2020/02/08 Cape Winelands (WCW) Rapid 30 0.60 6 6 2.5 1200.0 1200.0 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 26 9 1 16 9.5 36.5 -114.4 1193.7 1079.3
White 13 6 1 6 6.5 50.0 0.0 1167.9 1167.9
Black 13 3 0 10 3.0 23.1 -228.8 1219.5 990.6
Standard All 5 2 0 3 2.0 40.0 -85.0 1166.5 1081.5
White 2 1 0 1 1.0 50.0 0.0 1165.2 1165.2
Black 3 1 0 2 1.0 33.3 -141.7 1167.5 1025.8
Rapid All 21 7 1 13 7.5 35.7 -121.4 1200.2 1078.7
White 11 5 1 5 5.5 50.0 0.0 1168.4 1168.4
Black 10 2 0 8 2.0 20.0 -255.0 1235.1 980.1
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 2090097016 Siebert, E (Emily) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
2 2100138478 Sidanga, R (Ronique) 1 1.0 1 0 0 100.0 1166.5 425.0 1591.5 View list
3 2090097165 May, A (Audrey) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
4 2100130925 Lau, Z (Zoe) 1 1.0 1 0 0 100.0 1185.1 425.0 1610.1 View list
5 1090132965 James, F (Fadwa) 1 1.0 1 0 0 100.0 1185.1 425.0 1610.1 View list
6 2090097166 Lombard, E (Elri) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
7 2100118009 De Villiers, L (Lienka) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
8 1100109824 Daniels, E (Ethan) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
9 1100151354 Swarts, A (Anesto) 1 1.0 1 0 0 100.0 1166.5 425.0 1591.5 View list
10 210089562 Bester, M (Milla) 1 0.5 0 1 0 50.0 1200.0 0.0 1200.0 View list
11 109094924 Matinywa, T (Thobani) 1 0.0 0 0 1 0.0 1166.5 -425.0 741.5 View list
12 1070097558 Maruma, K (Katlego) 1 0.0 0 0 1 0.0 1162.0 -425.0 737.0 View list
13 1100108988 Rule, C (Calem) 1 0.0 0 0 1 0.0 1200.0 -425.0 775.0 View list
14 1120109662 Roberts, I (Iwan) 1 0.0 0 0 1 0.0 1162.0 -425.0 737.0 View list
15 1090150663 Pietersen, C (Christiano) 1 0.0 0 0 1 0.0 1166.5 -425.0 741.5 View list
16 2090108395 Mqadi, O (Olethiwe) 1 0.0 0 0 1 0.0 1185.1 -425.0 760.1 View list
17 1100152325 Mitchell, M (Matthew) 1 0.0 0 0 1 0.0 1166.5 -425.0 741.5 View list
18 1100151347 Liebenberg, C (Christiaan) 1 0.0 0 0 1 0.0 1162.0 -425.0 737.0 View list
19 2100132323 Laurance, E (Emma) 1 0.0 0 0 1 0.0 1200.0 -425.0 775.0 View list
20 1850130543 Harmse, A (Andre) 1 0.0 0 0 1 0.0 1185.1 -425.0 760.1 View list