Player Page

Gretffrath, S (Sonja)
Dob: 2010/01/30 (U16)
Gender: Female
Chess SA id: 2100149930
FIDE id:
Region: Eden (WEG)
Citizen: RSA
Title(s):
Last active: 2023/07/29 (437 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 rating1313.6
Current Weighted rating1312.1
Current Weighted performance1092.3
Current official/published rating (highest between Raw, WR and WP)1313.6
Current highest rating achieved1324.2
Current floor (min rating allowed)824.2
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)±141.0
Current Raw change used (final)0.0
Projected new Raw rating1313.6
Projected new Weighed rating1207.8
Projected new Weighted performance1092.3
Projected new final Raw rating (if new WP > new Raw)1313.6
Projected new highest rating1324.2
Projected new floor824.2
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1313.6
Projected effective change (new Official - current Official)=0.0
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 rating1302.8
Current Weighted rating1302.9
Current Weighted performance1092.3
Current official/published rating (highest between Raw, WR and WP)1302.9
Current highest rating achieved1341.3
Current floor (min rating allowed)841.3
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)±143.2
Current Raw change used (final)0.0
Projected new Raw rating1302.8
Projected new Weighed rating1199.0
Projected new Weighted performance1092.3
Projected new final Raw rating (if new WP > new Raw)1302.8
Projected new highest rating1341.3
Projected new floor841.3
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1302.8
Projected effective change (new Official - current Official)-0.1
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 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
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
15 Top Schools 2023 (U13) 2023/07/29 2023/07/29 Eden District (WEG) Standard 60 0.83 5 4 1.5 1347.9 1344.3 Analysis
14 Western Cape PS Individuals 2023 (U13 Girls) 2023/05/05 2023/05/06 Cape Town (WCT) Standard 60 0.83 6 6 2.0 1324.2 1341.3 Analysis
13 Eden Trails 1 2023 (U13 Girls) 2023/03/11 2023/03/11 Eden District (WEG) Standard 60 0.83 5 5 4.0 1279.1 1288.7 Analysis
12 George Chess Trials 3 2023 (U13 Girls) 2023/02/25 2023/02/25 Eden District (WEG) Standard 60 0.83 5 5 4.0 1241.2 1248.4 Analysis
11 George Chess Trials 2 2023 (U13 Girls) 2023/02/11 2023/02/11 Cape Town (WCT) Standard 60 0.83 5 5 2.0 1241.2 1248.4 Analysis
10 George Topskole 2022 (O13) 2022/07/30 2022/07/30 Eden District (WEG) Standard 60 0.83 5 5 4.0 1200.0 1200.0 Analysis
9 Eden Schools Closed Trials 1 2020 (U11 Girls) 2020/03/07 2020/03/07 Eden District (WEG) Standard 65 0.85 5 5 4.0 1272.4 1281.7 Analysis
8 George Trial 3 2020 (U12) 2020/02/22 2020/02/22 Eden District (WEG) Standard 65 0.85 5 0 0.0 1243.0 1249.7 Analysis
7 George Trial 2 2020 (U12) 2020/02/08 2020/02/08 Eden District (WEG) Standard 65 0.85 5 5 4.0 1243.0 1249.7 Analysis
6 George Trial 1 2020 (U12) 2020/01/25 2020/01/25 Eden District (WEG) Standard 65 0.85 5 5 3.0 1220.0 1224.1 Analysis
5 Western Cape Schools Individuals 2019 (U9 Girls) 2019/05/18 2019/05/19 Eden District (WEG) Standard 60 0.83 6 6 3.0 1236.4 1243.9 Analysis
4 Eden Trials 2 2019 (U10 Open) 2019/04/13 2019/04/13 Eden District (WEG) Standard 60 0.83 5 5 3.0 1218.8 1222.3 Analysis
3 Eden Trials 1 2019 (U10 Open) 2019/03/02 2019/03/02 Eden District (WEG) Standard 60 0.83 5 5 2.0 1224.8 1229.5 Analysis
2 George Trials 3 2019 (U10) 2019/02/23 2019/02/23 Eden District (WEG) Standard 60 0.83 5 4 2.5 1200.0 1200.0 Analysis
1 George Trials 2 2019 (U10) 2019/02/09 2019/02/09 Eden District (WEG) Standard 60 0.83 5 5 3.0 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 70 41 2 27 42.0 60.0 85.0 1241.6 1326.6
White 38 23 1 14 23.5 61.8 100.7 1235.7 1336.4
Black 32 18 1 13 18.5 57.8 66.4 1248.6 1315.0
Standard All 70 41 2 27 42.0 60.0 85.0 1241.6 1326.6
White 38 23 1 14 23.5 61.8 100.7 1235.7 1336.4
Black 32 18 1 13 18.5 57.8 66.4 1248.6 1315.0
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
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 2110119491 Mpuru, M (Moyisi) 3 2.5 2 1 0 83.3 1317.1 283.3 1600.4 View list
2 2100109379 Gouws, G (Garlan) 3 1.0 1 0 2 33.3 1251.6 -141.7 1109.9 View list
3 2110136933 Douglas, C (Caitlin) 3 0.0 0 0 3 0.0 1253.8 -425.0 828.8 View list
4 2100108133 Kruger, R (Riasha) 2 2.0 2 0 0 100.0 1256.8 425.0 1681.8 View list
5 1110130128 Da Silva, D (Darren) 2 1.0 1 0 1 50.0 1200.0 0.0 1200.0 View list
6 110086098 Booysen, L (Lukas) 2 0.0 0 0 2 0.0 1286.3 -425.0 861.3 View list
7 2100098400 Van Zyl, C (Carli) 2 0.0 0 0 2 0.0 1230.6 -425.0 805.6 View list
8 2100109051 Gugulo, N (Nonkosi) 1 1.0 1 0 0 100.0 1236.4 425.0 1661.4 View list
9 1100119462 Du Plessis, L (Liam) 1 1.0 1 0 0 100.0 1220.0 425.0 1645.0 View list
10 2100118904 Claassen, K (Keaney) 1 1.0 1 0 0 100.0 1279.1 425.0 1704.1 View list
11 2100108154 Bukenya, P (Princess) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
12 2100108734 Botma, I (Inke) 1 1.0 1 0 0 100.0 1236.4 425.0 1661.4 View list
13 1100130139 Boshoff, L (Lisa) 1 1.0 1 0 0 100.0 1243.0 425.0 1668.0 View list
14 2110107823 Boshoff, C (Carla) 1 1.0 1 0 0 100.0 1218.8 425.0 1643.8 View list
15 1110109659 Daries, T (Tyreez) 1 1.0 1 0 0 100.0 1224.8 425.0 1649.8 View list
16 1090144660 Gao, Z (Zhi) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
17 1100130141 Jonker, L (Liam) 1 1.0 1 0 0 100.0 1220.0 425.0 1645.0 View list
18 2100131997 Jansen, N (Nina Lee) 1 1.0 1 0 0 100.0 1272.4 425.0 1697.4 View list
19 1100119437 Jansen Van Rensburg, Z (Zandre) 1 1.0 1 0 0 100.0 1224.8 425.0 1649.8 View list
20 2100110934 Janse Van Rensburg, D (Danique) 1 1.0 1 0 0 100.0 1218.8 425.0 1643.8 View list