Player Page

Van Rooyen, JAK (Johan)
Dob: 2004/02/11 (Adult)
Gender: Male
Chess SA id: 104056519
FIDE id:
Region: Sedibeng (GSV)
Citizen: RSA
Title(s):
Last active: 2024/08/31 (85 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 rating1218.0
Current Weighted rating1233.3
Current Weighted performance780.4
Current official/published rating (highest between Raw, WR and WP)1233.3
Current highest rating achieved1338.4
Current floor (min rating allowed)838.4
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 rating1134.3
Projected new Weighted performance780.4
Projected new final Raw rating (if new WP > new Raw)1218.0
Projected new highest rating1338.4
Projected new floor838.4
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)-15.3
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 rating1221.2
Current Weighted rating1238.2
Current Weighted performance667.7
Current official/published rating (highest between Raw, WR and WP)1238.2
Current highest rating achieved1331.1
Current floor (min rating allowed)831.1
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)±160.9
Current Raw change used (final)0.0
Projected new Raw rating1221.2
Projected new Weighed rating1139.1
Projected new Weighted performance667.7
Projected new final Raw rating (if new WP > new Raw)1221.2
Projected new highest rating1331.1
Projected new floor831.1
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1221.2
Projected effective change (new Official - current Official)-17.0
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 rating1044.2
Current Weighted rating1045.7
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1045.7
Current highest rating achieved1044.2
Current floor (min rating allowed)544.2
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)±207.0
Current Raw change used (final)0.0
Projected new Raw rating1044.2
Projected new Weighed rating961.8
Projected new Weighted performance304.2
Projected new final Raw rating (if new WP > new Raw)1044.2
Projected new highest rating1044.2
Projected new floor544.2
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1044.2
Projected effective change (new Official - current Official)-1.5
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 rating1066.2
Current Weighted rating1066.2
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1066.2
Current highest rating achieved1066.2
Current floor (min rating allowed)566.2
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)±200.6
Current Raw change used (final)0.0
Projected new Raw rating1066.2
Projected new Weighed rating980.9
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1066.2
Projected new floor566.2
Projected new K-facor40
Projected new official/published rating (highest between new Raw, new WR and new WP)1066.2
Projected effective change (new Official - current Official)=0.0
Tournaments
Did not participate this month.
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
1 North School Primary Chess Open 2024 (A) 2024/08/31 2024/08/31 Sedibeng (GSV) Standard 60 0.83 5 4 1.0 1234.7 1241.4 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
14 North School Primary Chess Open 2024 (A) 2024/08/31 2024/08/31 Sedibeng (GSV) Standard 60 0.83 5 4 1.0 1234.7 1241.4 Analysis
13 VaalPark Primary Open Chess 2023 (A) 2023/06/16 2023/06/16 Sedibeng (GSV) Rapid 45 0.74 5 4 1.0 1252.3 1066.2 Analysis
12 2019 South African Junior Team Championships (U16C) 2020/01/04 2020/01/08 4 Knights (4K) Standard 120 1.00 7 7 3.0 1298.7 1285.0 Analysis
11 GE vs GSV Inter Regional 2019 (U16C) 2019/10/26 2019/10/26 Ekurhuleni (GE) Standard 60 0.83 5 5 3.5 1338.4 1331.1 Analysis
10 Fonteine Ope 2019 (A) 2019/10/19 2019/10/19 Sedibeng (GSV) Standard 60 0.83 5 5 1.0 1338.4 1331.1 Analysis
9 Vaal Chess Club Open 2019 (B) 2019/06/01 2019/06/01 Sedibeng (GSV) Standard 61 0.83 5 5 4.0 1286.8 1282.3 Analysis
8 Amigo Spur Eligwa Chess Open 2019 (B) 2019/05/18 2019/05/18 Sedibeng (GSV) Standard 61 0.83 5 5 4.5 1062.7 1069.4 Analysis
7 Word of Life 2019 (B) 2019/05/11 2019/05/11 Sedibeng (GSV) Standard 60 0.83 5 5 4.0 1062.7 1069.4 Analysis
6 Dirk de Koster Chess Open 2019 (B) 2019/04/13 2019/04/13 Sedibeng (GSV) Standard 61 0.83 5 5 3.5 1009.9 1007.0 Analysis
5 Carels Open 2019 (B) 2019/03/02 2019/03/02 Sedibeng (GSV) Standard 61 0.83 5 5 3.0 999.6 993.8 Analysis
4 Sasolburg Open 2018 (B) 2018/06/02 2018/06/02 Sedibeng (GSV) Standard 61 0.83 5 4 2.5 986.7 976.6 Analysis
3 Amigo Spur Eligwa Chess Open 2018 (B) 2018/05/19 2018/05/19 Sedibeng (GSV) Standard 60 0.83 5 5 3.0 1009.9 995.8 Analysis
2 Carels Open 2018 (B) 2018/03/03 2018/03/03 Sedibeng (GSV) Standard 61 0.83 5 5 2.0 1078.6 1078.6 Analysis
1 South African Junior Team Championships 2017 (U14D) 2018/01/04 2018/01/08 4 Knights (4K) Standard 120 1.00 7 7 5.5 1066.2 1066.2 Analysis
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 4 1 0 3 1.0 25.0 -212.5 1347.7 1135.2
White 3 1 0 2 1.0 33.3 -141.7 1300.7 1159.0
Black 1 0 0 1 0.0 0.0 -425.0 1488.9 1063.9
Standard All 4 1 0 3 1.0 25.0 -212.5 1347.7 1135.2
White 3 1 0 2 1.0 33.3 -141.7 1300.7 1159.0
Black 1 0 0 1 0.0 0.0 -425.0 1488.9 1063.9
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 71 38 7 26 41.5 58.5 71.8 1073.9 1145.7
White 40 23 5 12 25.5 63.8 116.9 1049.5 1166.3
Black 31 15 2 14 16.0 51.6 13.7 1105.4 1119.1
Standard All 67 37 7 23 40.5 60.4 88.8 1058.8 1147.6
White 38 23 5 10 25.5 67.1 145.4 1032.1 1177.5
Black 29 14 2 13 15.0 51.7 14.7 1093.9 1108.5
Rapid All 4 1 0 3 1.0 25.0 -212.5 1325.9 1113.4
White 2 0 0 2 0.0 0.0 -425.0 1379.2 954.2
Black 2 1 0 1 1.0 50.0 0.0 1272.7 1272.7
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 103080723 Sejeng, O (Onkatlile) 3 1.0 1 0 2 33.3 1024.1 -141.7 882.4 View list
2 105087685 Van Der Mescht, MJ (Marnus) 2 2.0 2 0 0 100.0 1032.9 425.0 1457.9 View list
3 105082940 Minnaar, JP (Juan) 2 1.0 1 0 1 50.0 1162.6 0.0 1162.6 View list
4 102052261 Rossouw, AW (Andreas) 2 1.0 1 0 1 50.0 1070.7 0.0 1070.7 View list
5 104033189 Saunderson, F (Fredricht) 2 1.0 1 0 1 50.0 1182.5 0.0 1182.5 View list
6 101095340 Ledwaba, T (Thabang) 1 1.0 1 0 0 100.0 986.7 425.0 1411.7 View list
7 104086509 Khumalo, N (Nkosinathi) 1 1.0 1 0 0 100.0 999.6 425.0 1424.6 View list
8 108072965 Hattingh, JH (Johannes) 1 1.0 1 0 0 100.0 1338.4 425.0 1763.4 View list
9 105044681 Hansen, R (Ryan) 1 1.0 1 0 0 100.0 1062.7 425.0 1487.7 View list
10 105085039 Hanekom, D (Dylan) 1 1.0 1 0 0 100.0 1062.7 425.0 1487.7 View list
11 107079721 Hanekom, D (Dewan) 1 1.0 1 0 0 100.0 1338.4 425.0 1763.4 View list
12 1770190884 Hanauer, A (Anthony) 1 1.0 1 0 0 100.0 1234.7 425.0 1659.7 View list
13 103011504 Guldenpfennig, CB (Conrad) 1 1.0 1 0 0 100.0 1062.7 425.0 1487.7 View list
14 207068593 Griesel, ZC (Zandrie C) 1 1.0 1 0 0 100.0 1286.8 425.0 1711.8 View list
15 104005961 Daniel, CV (Christiaan) 1 1.0 1 0 0 100.0 1066.2 425.0 1491.2 View list
16 105060444 Edwards, B (Brandon) 1 1.0 1 0 0 100.0 1066.2 425.0 1491.2 View list
17 102095339 Dube, B (Brandon) 1 1.0 1 0 0 100.0 1009.9 425.0 1434.9 View list
18 103095921 Diedericks, C (Christiaan) 1 1.0 1 0 0 100.0 1009.9 425.0 1434.9 View list
19 102088116 Ledwaba, TM (Thabang) 1 1.0 1 0 0 100.0 1062.7 425.0 1487.7 View list
20 1010099388 Mantle, M (Moses) 1 1.0 1 0 0 100.0 1062.7 425.0 1487.7 View list