Player Page

Grobler, JTW (Johannes Theodorus Wessel)
Dob: 2007/06/25 (U18)
Gender: Male
Chess SA id: 107088585
FIDE id:
Region: Tshwane (GTP)
Citizen: RSA
Title(s):
Last active: 2024/09/01 (7 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 rating1625.1
Current Weighted rating1473.7
Current Weighted performance1621.1
Current official/published rating (highest between Raw, WR and WP)1625.1
Current highest rating achieved1625.1
Current floor (min rating allowed)1125.1
Current K-factor28
Games played this month12
Score (S)8.5
Expected score (We)8.76
Difference (S-We)-0.19
Current Raw change (no limits, including tournament time weight)-5.4
Current min/max change allowed (with limits)±90.5
Current Raw change used (final)-5.4
Projected new Raw rating1619.7
Projected new Weighed rating1358.2
Projected new Weighted performance1633.6
Projected new final Raw rating (if new WP > new Raw)1633.6
Projected new highest rating1633.6
Projected new floor1133.6
Projected new K-facor28
Projected new official/published rating (highest between new Raw, new WR and new WP)1633.6
Projected effective change (new Official - current Official)+8.5
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 rating1629.2
Current Weighted rating1469.7
Current Weighted performance1621.1
Current official/published rating (highest between Raw, WR and WP)1629.2
Current highest rating achieved1629.2
Current floor (min rating allowed)1129.2
Current K-factor28
Games played this month12
Score (S)8.5
Expected score (We)8.81
Difference (S-We)-0.31
Current Raw change (no limits, including tournament time weight)-8.7
Current min/max change allowed (with limits)±90.0
Current Raw change used (final)-8.7
Projected new Raw rating1620.5
Projected new Weighed rating1355.0
Projected new Weighted performance1633.6
Projected new final Raw rating (if new WP > new Raw)1633.6
Projected new highest rating1633.6
Projected new floor1133.6
Projected new K-facor28
Projected new official/published rating (highest between new Raw, new WR and new WP)1633.6
Projected effective change (new Official - current Official)+4.4
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 rating931.2
Current Weighted rating931.2
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)931.2
Current highest rating achieved931.2
Current floor (min rating allowed)500.0
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)±243.2
Current Raw change used (final)0.0
Projected new Raw rating931.2
Projected new Weighed rating856.7
Projected new Weighted performance782.1
Projected new final Raw rating (if new WP > new Raw)931.2
Projected new highest rating931.2
Projected new floor500.0
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)931.2
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 rating500.0
Current Weighted rating500.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)500.0
Current highest rating achieved500.0
Current floor (min rating allowed)500.0
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)±449.5
Current Raw change used (final)0.0
Projected new Raw rating500.0
Projected new Weighed rating460.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating500.0
Projected new floor500.0
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)500.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Tournament: 2024 Etienne Lewis (U18+U20)
Start: 2024/08/30  End: 2024/09/01  Host: GTP  Type: Standard   Time: 90  Time weight: 0.94  Rounds: 7
Games: 7  Score: 4.5
Main rating: 1625.1  Rating gain/loss: 5.5
Type rating: 1629.2  Rating gain/loss: 5.9
Analysis
Tournament: Gauteng Schools Individuals Finals 2024 (U18 Boys)
Start: 2024/08/17  End: 2024/08/17  Host: GE  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 5
Games: 5  Score: 4.0
Main rating: 1625.1  Rating gain/loss: -10.9
Type rating: 1629.2  Rating gain/loss: -14.6
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
10 2024 Etienne Lewis (U18+U20) 2024/08/30 2024/09/01 Tshwane (GTP) Standard 90 0.94 7 7 4.5 1625.1 1629.2 Analysis
9 Gauteng Schools Individuals Finals 2024 (U18 Boys) 2024/08/17 2024/08/17 Ekurhuleni (GE) Standard 60 0.83 5 5 4.0 1625.1 1629.2 Analysis
8 2024 Alekhine Open Chess Tournament (A) 2024/08/09 2024/08/10 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1512.5 1517.3 Analysis
7 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U19A) 2024/08/03 2024/08/03 Tshwane (GTP) Standard 60 0.83 5 5 5.0 1512.5 1517.3 Analysis
6 2024 Tshwane South School District CLOSED Individual Championships (U18 Mixed) 2024/05/11 2024/05/11 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1498.2 1499.1 Analysis
5 2024 KSNG CHess Academy Open Tournament (C) 2024/04/06 2024/04/06 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1481.2 1475.4 Analysis
4 2024 Tshwane Chess AHS Open Chess Tournament (B) 2024/02/24 2024/02/24 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1494.2 1486.9 Analysis
3 2024 Blou Bul Open Chess Tournament (B) 2024/02/10 2024/02/10 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1494.2 1486.9 Analysis
2 2024 Piet Robbertse Open Chess Tournament (B) 2024/02/03 2024/02/04 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1494.2 1486.9 Analysis
1 2024 Gauteng Inter-Region Chess Championship (U18A) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 4.5 1443.5 1437.5 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
43 2024 Etienne Lewis (U18+U20) 2024/08/30 2024/09/01 Tshwane (GTP) Standard 90 0.94 7 7 4.5 1625.1 1629.2 Analysis
42 Gauteng Schools Individuals Finals 2024 (U18 Boys) 2024/08/17 2024/08/17 Ekurhuleni (GE) Standard 60 0.83 5 5 4.0 1625.1 1629.2 Analysis
41 2024 Alekhine Open Chess Tournament (A) 2024/08/09 2024/08/10 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1512.5 1517.3 Analysis
40 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U19A) 2024/08/03 2024/08/03 Tshwane (GTP) Standard 60 0.83 5 5 5.0 1512.5 1517.3 Analysis
39 2024 Tshwane South School District CLOSED Individual Championships (U18 Mixed) 2024/05/11 2024/05/11 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1498.2 1499.1 Analysis
38 2024 KSNG CHess Academy Open Tournament (C) 2024/04/06 2024/04/06 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1481.2 1475.4 Analysis
37 2024 Tshwane Chess AHS Open Chess Tournament (B) 2024/02/24 2024/02/24 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1494.2 1486.9 Analysis
36 2024 Blou Bul Open Chess Tournament (B) 2024/02/10 2024/02/10 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1494.2 1486.9 Analysis
35 2024 Piet Robbertse Open Chess Tournament (B) 2024/02/03 2024/02/04 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1494.2 1486.9 Analysis
34 2024 Gauteng Inter-Region Chess Championship (U18A) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 4.5 1443.5 1437.5 Analysis
33 2023 Moja Chess Extravaganza (B) 2023/09/30 2023/10/04 Frances Baard (NCF) Standard 120 1.00 9 8 2.5 1516.8 1510.5 Analysis
32 2023 Alekhine Open Tournament (B) 2023/09/09 2023/09/10 Tshwane (GTP) Standard 90 0.94 5 4 3.5 1426.3 1430.4 Analysis
31 2023 Etienne Lewis Closed Tournament (U18+U20) 2023/08/25 2023/08/27 Tshwane (GTP) Standard 90 0.94 7 7 5.5 1365.2 1353.4 Analysis
30 2023 Gauteng Top Schools (U19 Mixed) 2023/08/19 2023/08/19 West Rand (GWR) Standard 60 0.83 5 5 3.0 1365.2 1353.4 Analysis
29 2023 Tshwane South School District CLOSED League Championship (U19) 2023/07/29 2023/07/29 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1370.2 1360.2 Analysis
28 2023 Mid Gauteng Open Tournament (B) 2023/05/06 2023/05/06 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1342.8 1317.0 Analysis
27 2023 Tshwane South School District CLOSED Individual Championships (U18 Open) 2023/04/22 2023/04/22 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1382.4 1368.5 Analysis
26 Silver Lakes Open Chess Tournament (B) 2023/04/15 2023/04/15 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1382.4 1368.5 Analysis
25 Chris Greyling Open Tournament 2023 (B) 2023/03/21 2023/03/21 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1378.4 1353.7 Analysis
24 2023 Afrikaans Hoër Seunskool Open Chess Tournament (B) 2023/03/04 2023/03/04 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1378.4 1353.7 Analysis
123
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 52 32 8 12 36.0 69.2 163.5 1434.4 1597.8
White 30 19 4 7 21.0 70.0 170.0 1426.3 1596.3
Black 22 13 4 5 15.0 68.2 154.5 1445.4 1599.9
Standard All 52 32 8 12 36.0 69.2 163.5 1434.4 1597.8
White 30 19 4 7 21.0 70.0 170.0 1426.3 1596.3
Black 22 13 4 5 15.0 68.2 154.5 1445.4 1599.9
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 230 121 38 71 140.0 60.9 92.4 1309.4 1401.8
White 117 65 21 31 75.5 64.5 123.5 1317.4 1440.9
Black 113 56 17 40 64.5 57.1 60.2 1301.1 1361.3
Standard All 211 110 35 66 127.5 60.4 88.6 1317.2 1405.8
White 108 59 19 30 68.5 63.4 114.1 1323.4 1437.5
Black 103 51 16 36 59.0 57.3 61.9 1310.6 1372.5
Rapid All 19 11 3 5 12.5 65.8 134.2 1223.0 1357.2
White 9 6 2 1 7.0 77.8 236.1 1245.4 1481.5
Black 10 5 1 4 5.5 55.0 42.5 1202.8 1245.3
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 108052034 Du Toit, SJM (Stephanus (Matteo)) 4 1.0 1 0 3 25.0 1388.0 -212.5 1175.5 View list
2 107078866 Ferreira, H (Hechter) 4 1.0 0 2 2 25.0 1358.4 -212.5 1145.9 View list
3 1090098574 Gounder, A (Arun) 3 3.0 3 0 0 100.0 1387.5 425.0 1812.5 View list
4 108082684 De Vries, MA (Andrio) 3 2.5 2 1 0 83.3 1391.2 283.3 1674.6 View list
5 2060097845 Venter, Z (Zanri) 3 2.0 2 0 1 66.7 1173.0 141.7 1314.6 View list
6 188026981 Ndubane, D (Dumsane) 3 0.5 0 1 2 16.7 1309.1 -283.3 1025.8 View list
7 1060144844 Ngobeni, N (Njabulo) 3 0.5 0 1 2 16.7 1501.9 -283.3 1218.6 View list
8 2120111139 Maharaj, A (Aditi) 2 2.0 2 0 0 100.0 1356.6 425.0 1781.6 View list
9 1080130090 Matsioloko, O (Osega) 2 2.0 2 0 0 100.0 1437.1 425.0 1862.1 View list
10 1120119689 Rust, C (Christoph) 2 2.0 2 0 0 100.0 1494.2 425.0 1919.2 View list
11 171036861 Swanepoel, K (Karel) 2 2.0 2 0 0 100.0 1312.8 425.0 1737.8 View list
12 2110141710 Dikolomela, T (Tlhogi) 2 1.5 1 1 0 75.0 1418.5 212.5 1631.0 View list
13 1080143163 Fidos, E (Eric) 2 1.5 1 1 0 75.0 1408.9 212.5 1621.4 View list
14 199090747 Makumbila, B (Blessing) 2 1.5 1 1 0 75.0 1469.4 212.5 1681.9 View list
15 107079041 Crause, M (Mynhardt) 2 1.0 1 0 1 50.0 985.0 0.0 985.0 View list
16 106095058 Dippenaar, A (Adriaan) 2 1.0 1 0 1 50.0 828.3 0.0 828.3 View list
17 1110096784 Radia, S (Shyam) 2 1.0 1 0 1 50.0 1378.4 0.0 1378.4 View list
18 1060099976 Wilson, P (Petrus Johannes) 2 1.0 1 0 1 50.0 747.8 0.0 747.8 View list
19 108090807 Mcphail, R (Ryan) 2 1.0 0 2 0 50.0 1341.8 0.0 1341.8 View list
20 1080145977 Grunenfelder, S (Stiaan Bosua) 2 0.5 0 1 1 25.0 1407.3 -212.5 1194.8 View list