Player Page

Koen, I (Ivan)
Dob: 2005/11/18 (U20)
Gender: Male
Chess SA id: 105054141
FIDE id:
Region: Eden (WEG)
Citizen: RSA
Title(s):
Last active: 2023/12/10 (272 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 rating1557.8
Current Weighted rating1546.7
Current Weighted performance1362.7
Current official/published rating (highest between Raw, WR and WP)1557.8
Current highest rating achieved1557.8
Current floor (min rating allowed)1057.8
Current K-factor32
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)±99.6
Current Raw change used (final)0.0
Projected new Raw rating1557.8
Projected new Weighed rating1424.5
Projected new Weighted performance1362.7
Projected new final Raw rating (if new WP > new Raw)1557.8
Projected new highest rating1557.8
Projected new floor1057.8
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1557.8
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 rating1539.6
Current Weighted rating1528.4
Current Weighted performance1340.6
Current official/published rating (highest between Raw, WR and WP)1539.6
Current highest rating achieved1539.6
Current floor (min rating allowed)1039.6
Current K-factor32
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)±102.2
Current Raw change used (final)0.0
Projected new Raw rating1539.6
Projected new Weighed rating1407.6
Projected new Weighted performance1340.6
Projected new final Raw rating (if new WP > new Raw)1539.6
Projected new highest rating1539.6
Projected new floor1039.6
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1539.6
Projected effective change (new Official - current Official)=0.0
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 rating1270.6
Current Weighted rating1237.6
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1270.6
Current highest rating achieved1270.6
Current floor (min rating allowed)770.6
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)±149.9
Current Raw change used (final)0.0
Projected new Raw rating1270.6
Projected new Weighed rating1140.0
Projected new Weighted performance627.8
Projected new final Raw rating (if new WP > new Raw)1270.6
Projected new highest rating1270.6
Projected new floor770.6
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1270.6
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 rating1375.6
Current Weighted rating1348.5
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1375.6
Current highest rating achieved1401.7
Current floor (min rating allowed)901.7
Current K-factor32
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)±129.1
Current Raw change used (final)0.0
Projected new Raw rating1375.6
Projected new Weighed rating1244.6
Projected new Weighted performance1157.1
Projected new final Raw rating (if new WP > new Raw)1375.6
Projected new highest rating1401.7
Projected new floor901.7
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1375.6
Projected effective change (new Official - current Official)=0.0
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
36 2023 Western Cape Rural Cup (U20) 2023/12/09 2023/12/10 Cape Winelands (WCW) Standard 60 0.83 5 4 3.0 1551.1 1528.4 Analysis
35 2023 Western Cape Rural Cup (Blitz) 2023/12/08 2023/12/08 Cape Winelands (WCW) Blitz 5 0.18 7 7 4.0 1551.1 1401.7 Analysis
34 Pacaltsdorp Chess Club Open 2023 (A) 2023/08/26 2023/08/26 Eden District (WEG) Rapid 30 0.60 6 0 0.0 1551.1 1188.0 Analysis
33 InterClub Blitz 3 2023 2023/07/20 2023/07/20 Eden District (WEG) Blitz 5 0.18 10 8 7.5 1533.4 1262.0 Analysis
32 Inter Club Blitz 2 2023 (Open) 2023/06/21 2023/06/21 Eden District (WEG) Blitz 5 0.18 10 8 6.0 1528.2 1142.0 Analysis
31 Eden Trials 2+3 2023 (U20) 2023/04/15 2023/05/13 Eden District (WEG) Standard 60 0.83 10 10 8.0 1477.7 1460.9 Analysis
30 Eden Trails 1 2023 (U19 Boys) 2023/03/11 2023/03/11 Eden District (WEG) Standard 60 0.83 5 4 3.0 1459.4 1437.5 Analysis
29 George Chess Trials 1 2023 (U19 Boys) 2023/01/28 2023/01/28 Eden District (WEG) Standard 60 0.83 5 5 3.5 1467.4 1445.5 Analysis
28 Mossel Bay Open 2022 (A) 2022/09/30 2022/10/02 Eden District (WEG) Standard 90 0.94 6 5 1.5 1484.2 1462.1 Analysis
27 Pacaltsdorp Chess Club 2022 (A) 2022/08/27 2022/08/27 Eden District (WEG) Rapid 25 0.54 6 6 4.0 1438.2 1108.0 Analysis
26 Eden Topskole 2022 (O18 Ope) 2022/08/13 2022/08/13 Eden District (WEG) Standard 60 0.83 5 4 3.5 1438.2 1425.1 Analysis
25 NSSC Winter Games 2022 (U18 Boys) 2022/07/04 2022/07/06 Cape Town (WCT) Standard 70 0.87 7 7 3.5 1466.9 1454.5 Analysis
24 Western Cape Schools Chess 2022 (U18 Boys) 2022/05/07 2022/05/08 Eden District (WEG) Standard 65 0.85 6 6 4.5 1421.5 1419.3 Analysis
23 Eden Open 2022 (A) 2022/04/22 2022/04/24 Eden District (WEG) Standard 65 0.85 6 6 2.5 1441.9 1452.2 Analysis
22 Eden Proewe 2 2022 (O18 Seuns) 2022/04/09 2022/04/09 Eden District (WEG) Standard 65 0.85 5 5 4.0 1441.9 1452.2 Analysis
21 South African Junior Closed Chess Championships 2022 (U18 Open) 2022/03/28 2022/04/02 Chess South Africa (CSA) Standard 120 1.00 11 9 1.5 1441.9 1452.2 Analysis
20 Eden Proewe 1 2022 (O18 Seuns) 2022/03/12 2022/03/12 Eden District (WEG) Standard 65 0.85 5 5 4.5 1411.4 1417.3 Analysis
19 George Trials 3 2022 (U18) 2022/02/26 2022/02/26 Eden District (WEG) Standard 60 0.83 5 5 4.0 1385.7 1381.7 Analysis
18 George Trials 2 2022 (U18) 2022/02/12 2022/02/12 Eden District (WEG) Standard 60 0.83 5 5 4.0 1385.7 1381.7 Analysis
17 Eden Proewe 2021 (O18 Seuns) 2021/10/15 2021/10/15 Eden District (WEG) Rapid 30 0.60 5 5 2.5 1391.7 1142.0 Analysis
12
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 198 125 26 47 138.0 69.7 167.4 1270.6 1438.0
White 101 65 13 23 71.5 70.8 176.7 1266.7 1443.4
Black 97 60 13 24 66.5 68.6 157.7 1274.7 1432.4
Standard All 164 102 24 38 114.0 69.5 165.9 1236.2 1402.1
White 84 53 12 19 59.0 70.2 172.0 1232.4 1404.4
Black 80 49 12 19 55.0 68.8 159.4 1240.3 1399.6
Rapid All 11 6 1 4 6.5 59.1 77.3 1408.9 1486.2
White 5 3 1 1 3.5 70.0 170.0 1354.4 1524.4
Black 6 3 0 3 3.0 50.0 0.0 1454.3 1454.3
Blitz All 23 17 1 5 17.5 76.1 221.7 1449.5 1671.3
White 12 9 0 3 9.0 75.0 212.5 1470.0 1682.5
Black 11 8 1 2 8.5 77.3 231.8 1427.2 1659.0
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 105091176 Meyer, J (Jared) 7 6.0 5 2 0 85.7 1414.7 303.6 1718.3 View list
2 105088335 Taute, C (Clayden) 5 1.5 0 3 2 30.0 1451.0 -170.0 1281.0 View list
3 105048732 Eksteen, LH (Leigh-Hende) 4 3.5 3 1 0 87.5 1340.4 318.8 1659.1 View list
4 205069633 Prince, SN (Sharna) 4 3.5 3 1 0 87.5 1342.5 318.8 1661.3 View list
5 1050104301 Blaauw, L (Lucin) 3 3.0 3 0 0 100.0 1442.9 425.0 1867.9 View list
6 106061659 Coetsee, W (Wilco) 3 3.0 3 0 0 100.0 1219.6 425.0 1644.6 View list
7 105078145 Pietersen, J (Juwellyn) 3 3.0 3 0 0 100.0 1341.0 425.0 1766.0 View list
8 105054129 Daniels, M (Muhammed) 3 2.0 2 0 1 66.7 1327.5 141.7 1469.1 View list
9 198065504 Jaars, T (Thomas) 3 2.0 2 0 1 66.7 1498.2 141.7 1639.9 View list
10 1860140606 Nortje, P (Pieter) 3 2.0 2 0 1 66.7 1501.7 141.7 1643.3 View list
11 106061679 Sheldon, A (Ackim) 3 2.0 2 0 1 66.7 1308.1 141.7 1449.8 View list
12 105073361 Africa, L (Lindsay) 2 2.0 2 0 0 100.0 1551.1 425.0 1976.1 View list
13 106088308 Coetzee, A (Andre) 2 2.0 2 0 0 100.0 1382.3 425.0 1807.3 View list
14 105078155 Dillman, L (Laythum) 2 2.0 2 0 0 100.0 1444.6 425.0 1869.6 View list
15 1050118485 Du Toit, J (Jaywin) 2 2.0 2 0 0 100.0 1551.1 425.0 1976.1 View list
16 104086121 Fana, L (Lisakhanyo) 2 2.0 2 0 0 100.0 1385.7 425.0 1810.7 View list
17 187009941 Frans, LG (Llewellyn) 2 2.0 2 0 0 100.0 1528.2 425.0 1953.2 View list
18 101064100 Gilbert, C (Cheslyn) 2 2.0 2 0 0 100.0 1533.4 425.0 1958.4 View list
19 107086420 Kruger, S (Sachin) 2 2.0 2 0 0 100.0 1533.4 425.0 1958.4 View list
20 185029673 Peres, H (Heinrich) 2 2.0 2 0 0 100.0 1528.2 425.0 1953.2 View list