Player Page

Grobbelaar, A (Altus)
Dob: 2009/11/13 (U16)
Gender: Male
Chess SA id: 1090107941
FIDE id:
Region: Cape Winelands (WCW)
Citizen: RSA
Title(s):
Last active: 2024/10/05 (47 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 rating1239.1
Current Weighted rating1255.8
Current Weighted performance1057.0
Current official/published rating (highest between Raw, WR and WP)1255.8
Current highest rating achieved1324.1
Current floor (min rating allowed)824.1
Current K-factor36
Games played this month4
Score (S)1.0
Expected score (We)1.57
Difference (S-We)-0.47
Current Raw change (no limits, including tournament time weight)-17.0
Current min/max change allowed (with limits)±156.8
Current Raw change used (final)-17.0
Projected new Raw rating1222.1
Projected new Weighed rating1154.2
Projected new Weighted performance1083.4
Projected new final Raw rating (if new WP > new Raw)1222.1
Projected new highest rating1324.1
Projected new floor824.1
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1222.1
Projected effective change (new Official - current Official)-33.7
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 rating1254.1
Current Weighted rating1261.0
Current Weighted performance1099.6
Current official/published rating (highest between Raw, WR and WP)1261.0
Current highest rating achieved1304.8
Current floor (min rating allowed)804.8
Current K-factor36
Games played this month4
Score (S)1.0
Expected score (We)1.73
Difference (S-We)-0.73
Current Raw change (no limits, including tournament time weight)-26.3
Current min/max change allowed (with limits)±153.5
Current Raw change used (final)-26.3
Projected new Raw rating1227.8
Projected new Weighed rating1159.7
Projected new Weighted performance1115.0
Projected new final Raw rating (if new WP > new Raw)1227.8
Projected new highest rating1304.8
Projected new floor804.8
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1227.8
Projected effective change (new Official - current Official)-33.2
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 rating1199.6
Current Weighted rating1217.0
Current Weighted performance958.9
Current official/published rating (highest between Raw, WR and WP)1217.0
Current highest rating achieved1253.2
Current floor (min rating allowed)753.2
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)±165.9
Current Raw change used (final)0.0
Projected new Raw rating1199.6
Projected new Weighed rating1118.7
Projected new Weighted performance958.9
Projected new final Raw rating (if new WP > new Raw)1199.6
Projected new highest rating1253.2
Projected new floor753.2
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1199.6
Projected effective change (new Official - current Official)-17.4
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 rating1218.0
Current Weighted rating1218.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1218.0
Current highest rating achieved1218.0
Current floor (min rating allowed)718.0
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)±161.6
Current Raw change used (final)0.0
Projected new Raw rating1218.0
Projected new Weighed rating1120.6
Projected new Weighted performance172.9
Projected new final Raw rating (if new WP > new Raw)1218.0
Projected new highest rating1218.0
Projected new floor718.0
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1218.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Tournament: Paarl Boys' High Chess Festival 2024 (Elite)
Start: 2024/10/04  End: 2024/10/05  Host: WCW  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 4
Games: 4  Score: 1.0
Main rating: 1239.1  Rating gain/loss: -17.0
Type rating: 1254.1  Rating gain/loss: -26.3
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
4 Paarl Boys' High Chess Festival 2024 (Elite) 2024/10/04 2024/10/05 Cape Winelands (WCW) Standard 60 0.83 6 4 1.0 1239.1 1254.1 Analysis
3 Cape Winelands - Top Schools 2024 (U15 Mixed) 2024/07/27 2024/07/27 Cape Winelands (WCW) Standard 60 0.83 5 4 2.0 1237.0 1259.1 Analysis
2 Cape Winelands Schools - HS Trials 1 2024 (U15 Boys) 2024/02/17 2024/02/17 Cape Winelands (WCW) Rapid 35 0.66 6 6 2.0 1273.8 1238.8 Analysis
1 Cape Winelands - Marie Delport Memorial 2024 (Open) 2024/01/27 2024/01/28 Cape Winelands (WCW) Standard 70 0.87 6 5 2.0 1278.8 1267.7 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
29 Paarl Boys' High Chess Festival 2024 (Elite) 2024/10/04 2024/10/05 Cape Winelands (WCW) Standard 60 0.83 6 4 1.0 1239.1 1254.1 Analysis
28 Cape Winelands - Top Schools 2024 (U15 Mixed) 2024/07/27 2024/07/27 Cape Winelands (WCW) Standard 60 0.83 5 4 2.0 1237.0 1259.1 Analysis
27 Cape Winelands Schools - HS Trials 1 2024 (U15 Boys) 2024/02/17 2024/02/17 Cape Winelands (WCW) Rapid 35 0.66 6 6 2.0 1273.8 1238.8 Analysis
26 Cape Winelands - Marie Delport Memorial 2024 (Open) 2024/01/27 2024/01/28 Cape Winelands (WCW) Standard 70 0.87 6 5 2.0 1278.8 1267.7 Analysis
25 CW Top Schools 2023 (U15 Mix) 2023/08/26 2023/08/26 Cape Winelands (WCW) Rapid 32 0.63 5 5 2.5 1289.7 1253.2 Analysis
24 Cape Winelands Schools Chess - Trials 1 2023 (U15 Boys) 2023/02/25 2023/02/25 Cape Winelands (WCW) Standard 60 0.83 5 5 2.0 1324.1 1304.8 Analysis
23 CW Grass Roots Tournament 2022 (U13 Boys) 2022/11/19 2022/11/19 Cape Winelands (WCW) Standard 60 0.83 5 5 5.0 1248.5 1191.6 Analysis
22 Stellenbosch Primary 2022 (U13) 2022/08/13 2022/08/13 Cape Winelands (WCW) Rapid 30 0.60 6 6 4.0 1232.1 1230.5 Analysis
21 Rhenish Primary Tournament 2022 (U14) 2022/05/14 2022/05/14 Cape Winelands (WCW) Rapid 30 0.60 5 5 3.0 1222.4 1215.4 Analysis
20 Ceres Open 2022 (B) 2022/04/23 2022/04/23 Cape Winelands (WCW) Standard 65 0.85 6 6 3.0 1236.2 1198.0 Analysis
19 Cape Winelands Schools 2022 (U13 Boys) 2022/03/12 2022/03/12 Cape Winelands (WCW) Standard 60 0.83 5 5 3.0 1231.7 1176.8 Analysis
18 Central Winelands Schools Individual Trials 2022 (U13 Boys) 2022/02/19 2022/02/19 Cape Winelands (WCW) Rapid 35 0.66 5 5 3.0 1165.4 1191.8 Analysis
17 Cape Winelands Open 2022 (U14) 2022/02/12 2022/02/13 Cape Winelands (WCW) Standard 70 0.87 6 6 4.0 1165.4 1112.8 Analysis
16 Drakenstein Pioneers Inaugural 2020 (C) 2020/03/14 2020/03/14 Cape Winelands (WCW) Standard 60 0.83 5 5 2.0 1190.3 1138.0 Analysis
15 2020 Welgemoed Chess Challenge (U12) 2020/02/29 2020/02/29 Cape Town (WCT) Rapid 30 0.60 5 5 3.0 1149.2 1153.2 Analysis
14 Paul Roos Blitz 2020 2020/02/22 2020/02/22 Cape Winelands (WCW) Blitz 5 0.18 9 9 4.0 1149.2 1200.0 Analysis
13 Cape Winelands Schools Trials 1 2020 (U11 Boys) 2020/02/08 2020/02/08 Cape Winelands (WCW) Rapid 30 0.60 6 6 3.0 1149.2 1153.2 Analysis
12 Back to School Rapid 2020 (Boys) 2020/02/01 2020/02/01 West Coast (WCU) Rapid 20 0.47 5 5 2.0 1149.2 1153.2 Analysis
11 Stellenbosch Primary 2019 (U12) 2019/08/31 2019/08/31 Cape Winelands (WCW) Rapid 30 0.60 7 7 4.0 1113.9 1149.6 Analysis
10 2019 Western Province League (E) 2019/07/27 2019/08/10 Cape Town (WCT) Standard 60 0.83 9 3 2.0 1113.9 1105.6 Analysis
12
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 19 7 0 12 7.0 36.8 -111.8 1274.2 1162.3
White 10 1 0 9 1.0 10.0 -340.0 1302.9 962.9
Black 9 6 0 3 6.0 66.7 141.7 1242.3 1383.9
Standard All 13 5 0 8 5.0 38.5 -98.1 1311.6 1213.6
White 7 1 0 6 1.0 14.3 -303.6 1342.2 1038.6
Black 6 4 0 2 4.0 66.7 141.7 1276.0 1417.7
Rapid All 6 2 0 4 2.0 33.3 -141.7 1192.9 1051.3
White 3 0 0 3 0.0 0.0 -425.0 1211.2 786.2
Black 3 2 0 1 2.0 66.7 141.7 1174.7 1316.4
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 165 82 5 78 84.5 51.2 10.3 1181.1 1191.4
White 84 39 2 43 40.0 47.6 -20.2 1179.5 1159.2
Black 81 43 3 35 44.5 54.9 42.0 1182.9 1224.8
Standard All 59 30 1 28 30.5 51.7 14.4 1203.9 1218.3
White 30 14 0 16 14.0 46.7 -28.3 1197.5 1169.2
Black 29 16 1 12 16.5 56.9 58.6 1210.4 1269.0
Rapid All 97 48 4 45 50.0 51.5 13.1 1154.1 1167.2
White 50 23 2 25 24.0 48.0 -17.0 1156.1 1139.1
Black 47 25 2 20 26.0 55.3 45.2 1151.8 1197.0
Blitz All 9 4 0 5 4.0 44.4 -47.2 1324.1 1276.8
White 4 2 0 2 2.0 50.0 0.0 1335.7 1335.7
Black 5 2 0 3 2.0 40.0 -85.0 1314.8 1229.8
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 1090137694 Lombaard, R (Romelio) 3 2.0 2 0 1 66.7 1265.1 141.7 1406.7 View list
2 109088275 Zungula, C (Chulumanco) 3 0.0 0 0 3 0.0 1143.5 -425.0 718.5 View list
3 2070097094 Baartman, N (Nicole) 2 2.0 2 0 0 100.0 1087.7 425.0 1512.7 View list
4 206078295 Arries, TE (Tyra Elrihia) 2 2.0 2 0 0 100.0 1087.7 425.0 1512.7 View list
5 1100098105 Fransman, B (Benito) 2 2.0 2 0 0 100.0 1087.7 425.0 1512.7 View list
6 2090115876 George, H (Hayley-Ann) 2 2.0 2 0 0 100.0 1173.0 425.0 1598.0 View list
7 2060108658 Marais, C (Chante) 2 2.0 2 0 0 100.0 1087.7 425.0 1512.7 View list
8 1090098025 De Klerk, H (Hanro) 2 1.0 1 0 1 50.0 1255.3 0.0 1255.3 View list
9 1090137478 Koopman, J (Jayden) 2 1.0 1 0 1 50.0 1219.6 0.0 1219.6 View list
10 2090101915 Maart, M (Mia) 2 1.0 1 0 1 50.0 1227.3 0.0 1227.3 View list
11 108068738 Bester, C (Christoff) 2 0.0 0 0 2 0.0 1155.3 -425.0 730.3 View list
12 1080108607 Coetzee, C (Conlinn) 2 0.0 0 0 2 0.0 1281.6 -425.0 856.6 View list
13 2060108662 Luyt, I (Imke) 2 0.0 0 0 2 0.0 1087.7 -425.0 662.7 View list
14 1100118430 Springveldt, L (Lael) 2 0.0 0 0 2 0.0 1198.6 -425.0 773.6 View list
15 1080103429 Winter, C (Cuthanzario) 2 0.0 0 0 2 0.0 1128.9 -425.0 703.9 View list
16 1060117674 Adams, M (Marlin) 1 1.0 1 0 0 100.0 1236.2 425.0 1661.2 View list
17 1090151233 Adams, H (Hyrin) 1 1.0 1 0 0 100.0 1324.1 425.0 1749.1 View list
18 1080161483 Adams, C (Cuan) 1 1.0 1 0 0 100.0 1289.7 425.0 1714.7 View list
19 1100141748 Arries, A (Aldavian) 1 1.0 1 0 0 100.0 1248.5 425.0 1673.5 View list
20 1050132442 Appollis, M (Martino) 1 1.0 1 0 0 100.0 1149.2 425.0 1574.2 View list