Player Page

Marais, JS (Jacobus)
Dob: 2010/06/21 (U16)
Gender: Male
Chess SA id: 1100097226
FIDE id:
Region: Tshwane (GTP)
Citizen: RSA
Title(s):
Last active: 2024/05/02 (8 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 rating1292.2
Curent Weighted rating1230.7
Curent Weighted performance1220.7
Current official/published rating (highest between Raw, WR and WP)1292.2
Current floor (min rating allowed)792.2
Current highest rating achieved1292.2
Current K-factor36
Games played this month4
Score (S)1.0
Expected score (We)2.01
Difference (S-We)-1.01
Current Raw change (no limits, including tournament time weight)-30.2
Current min/max change allowed (with limits)±145.4
Current Raw change used (final)-30.2
Projected new Raw rating1262.0
Projected new Weighed rating1235.6
Projected new Weighted performance1220.7
Projected new official/published rating (highest between new Raw, new WR and new WP)1262.0
Projected effective change (new Official - current Official)-30.2
Projected new highest rating1292.2
Projected new floor792.2
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 rating1289.9
Curent Weighted rating1222.6
Curent Weighted performance1218.0
Current official/published rating (highest between Raw, WR and WP)1289.9
Current floor (min rating allowed)789.9
Current highest rating achieved1289.9
Current K-factor36
Games played this month4
Score (S)1.0
Expected score (We)2.01
Difference (S-We)-1.01
Current Raw change (no limits, including tournament time weight)-36.4
Current min/max change allowed (with limits)±145.9
Current Raw change used (final)-36.4
Projected new Raw rating1253.5
Projected new Weighed rating1227.6
Projected new Weighted performance1218.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1253.5
Projected effective change (new Official - current Official)-36.4
Projected new highest rating1289.9
Projected new floor789.9
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 rating1168.0
Curent Weighted rating1168.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1168.0
Current floor (min rating allowed)668.0
Current highest rating achieved1168.0
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)±173.6
Current Raw change used (final)0.0
Projected new Raw rating1168.0
Projected new Weighed rating1168.0
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1168.0
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1168.0
Projected new floor668.0
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 rating1200.0
Curent Weighted rating1200.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1200.0
Current floor (min rating allowed)668.0
Current highest rating achieved1200.0
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 rating1200.0
Projected new Weighted performance
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
Projected new highest rating1200.0
Projected new floor668.0
Projected new K-facor36
Tournaments
Tournament: 2024 Mid Gauteng Open Chess Tournament (U16)
Start: 2024/05/02  End: 2024/05/02  Host: GTP  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 4
Games: 4  Score: 1.0
Main rating: 1292.2  Rating gain/loss: -30.2
Type rating: 1289.9  Rating gain/loss: -36.4
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
2 2024 Mid Gauteng Open Chess Tournament (U16) 2024/05/02 2024/05/02 Tshwane (GTP) Standard 60 0.83 5 4 1.0 1292.2 1289.9 Analysis
1 2024 Gauteng Inter-Region Chess Championship (U14C) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 5.0 1196.1 1185.5 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
43 2024 Mid Gauteng Open Chess Tournament (U16) 2024/05/02 2024/05/02 Tshwane (GTP) Standard 60 0.83 5 4 1.0 1292.2 1289.9 Analysis
42 2024 Gauteng Inter-Region Chess Championship (U14C) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 5.0 1196.1 1185.5 Analysis
41 2023 Alekhine Open Tournament (C) 2023/09/09 2023/09/09 Tshwane (GTP) Standard 90 0.94 5 5 1.0 1235.7 1224.4 Analysis
40 2023 Etienne Lewis Closed Tournament (U14) 2023/08/25 2023/08/27 Tshwane (GTP) Standard 90 0.94 7 7 3.0 1258.0 1250.0 Analysis
39 2023 Milos Ristic Open Tournament (C) 2023/04/27 2023/04/27 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1263.9 1256.2 Analysis
38 2023 Afrikaans Hoër Seunskool Open Chess Tournament (C) 2023/03/04 2023/03/04 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1173.8 1163.7 Analysis
37 2023 Tshwane Chess Open Registration Tournament (C2) 2023/01/28 2023/01/28 Tshwane (GTP) Standard 60 0.83 5 5 2.5 1165.1 1152.2 Analysis
36 2022 South African Junior Team Chess Championships (U14 Open) 2022/12/04 2022/12/08 4 Knights (4K) Standard 120 1.00 7 5 3.5 1093.8 1075.9 Analysis
35 2022 Etienne Lewis (U14 Open) 2022/09/02 2022/09/04 Tshwane (GTP) Standard 90 0.94 7 7 2.0 1109.0 1092.8 Analysis
34 D4 Play Offs 2022 (U13) 2022/07/30 2022/07/30 Tshwane (GTP) Standard 60 0.83 5 5 1.0 1125.1 1111.2 Analysis
33 2022 Blou Bul Open (C) 2022/06/25 2022/06/26 Tshwane (GTP) Standard 90 0.94 5 5 0.5 1186.4 1177.4 Analysis
32 2022 Milos Ristic Open Chess Tournament (C) 2022/05/28 2022/05/28 Tshwane (GTP) Standard 60 0.83 5 4 2.0 1169.7 1156.2 Analysis
31 D4 Individuals 2022 (U13 Open) 2022/04/23 2022/04/23 Tshwane (GTP) Rapid 30 0.60 7 7 3.0 1164.1 1200.0 Analysis
30 2022 Gauteng Interregion (U12 Open) 2022/02/26 2022/02/26 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1146.5 1131.4 Analysis
29 CP Ope 2022 (C) 2022/02/19 2022/02/19 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1146.5 1131.4 Analysis
28 2022 Tshwane Chess Open Registration Tournament (C2) 2022/01/29 2022/01/29 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1150.1 1133.2 Analysis
27 2021 Etienne Lewis Closed Trials (U12 Open) 2021/09/24 2021/09/26 Nelson Mandela Bay (ENM) Standard 90 0.94 7 6 2.0 1188.7 1172.4 Analysis
26 2021 Chris Greyling Open Tournament (C) 2021/05/08 2021/05/08 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1156.5 1125.6 Analysis
25 2021 Lubowski Open Tournament (C) 2021/05/01 2021/05/02 Tshwane (GTP) Standard 90 0.94 5 5 2.0 1156.5 1125.6 Analysis
24 2021 Registration Tournament (C) 2021/03/13 2021/03/13 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1162.8 1132.4 Analysis
123
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 9 6 0 3 6.0 66.7 141.7 1257.7 1399.3
White 3 2 0 1 2.0 66.7 141.7 1288.3 1430.0
Black 6 4 0 2 4.0 66.7 141.7 1242.3 1384.0
Standard All 9 6 0 3 6.0 66.7 141.7 1257.7 1399.3
White 3 2 0 1 2.0 66.7 141.7 1288.3 1430.0
Black 6 4 0 2 4.0 66.7 141.7 1242.3 1384.0
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 227 96 16 115 104.0 45.8 -35.6 1184.1 1148.5
White 114 45 6 63 48.0 42.1 -67.1 1193.9 1126.8
Black 113 51 10 52 56.0 49.6 -3.8 1174.2 1170.4
Standard All 220 93 16 111 101.0 45.9 -34.8 1181.9 1147.1
White 111 45 6 60 48.0 43.2 -57.4 1187.8 1130.4
Black 109 48 10 51 53.0 48.6 -11.7 1175.9 1164.2
Rapid All 7 3 0 4 3.0 42.9 -60.7 1252.8 1192.1
White 3 0 0 3 0.0 0.0 -425.0 1420.5 995.5
Black 4 3 0 1 3.0 75.0 212.5 1127.0 1339.5
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 210088596 Louw, N (Nova) 3 3.0 3 0 0 100.0 1174.0 425.0 1599.0 View list
2 110092783 Van Rooyen, M (Marcel) 3 2.0 2 0 1 66.7 1159.8 141.7 1301.5 View list
3 2090109345 Viljoen, A (Amber) 3 2.0 2 0 1 66.7 1169.5 141.7 1311.2 View list
4 1110105109 Klopper, PA (Phillippus Arnoldus) 3 1.0 1 0 2 33.3 1154.4 -141.7 1012.8 View list
5 109083432 Vermeulen, T (Tiaan Leon) 3 0.5 0 1 2 16.7 1171.8 -283.3 888.4 View list
6 110088599 Bogaard, FK (Franco) 3 0.0 0 0 3 0.0 1178.2 -425.0 753.2 View list
7 1090103920 Reyneke, L (Luke) 3 0.0 0 0 3 0.0 1105.8 -425.0 680.8 View list
8 109086362 Yang, A (Alex) 3 0.0 0 0 3 0.0 1129.8 -425.0 704.8 View list
9 1110109561 Coetzee, M (Marko) 2 2.0 2 0 0 100.0 1127.3 425.0 1552.3 View list
10 1090101509 Janse Van Vuuren, A (Alexander) 2 2.0 2 0 0 100.0 1193.0 425.0 1618.0 View list
11 1090116741 Kekana, N (Neo) 2 2.0 2 0 0 100.0 1141.4 425.0 1566.4 View list
12 1100097309 O Rourke, R (Ronan) 2 2.0 2 0 0 100.0 1238.5 425.0 1663.5 View list
13 1110108342 Van Deventer, J (Jonathan) 2 2.0 2 0 0 100.0 1066.5 425.0 1491.5 View list
14 1090109066 Jooste, J (Josh) 2 1.5 1 1 0 75.0 1140.8 212.5 1353.3 View list
15 210094854 Eygelaar, L (Leila) 2 1.0 1 0 1 50.0 1142.4 0.0 1142.4 View list
16 1090098574 Gounder, A (Arun) 2 1.0 1 0 1 50.0 1147.4 0.0 1147.4 View list
17 109095323 Grobler, DDI (Donovan Denzel Izak) 2 1.0 1 0 1 50.0 1156.5 0.0 1156.5 View list
18 2110103926 Jacobs, AE (Alyssa) 2 1.0 1 0 1 50.0 1207.0 0.0 1207.0 View list
19 2080100531 Kowalsky, N (Natassja) 2 1.0 1 0 1 50.0 1085.0 0.0 1085.0 View list
20 208082677 Radia, D (Diya) 2 1.0 1 0 1 50.0 1158.0 0.0 1158.0 View list