Player Page

Chang, S (Samuel)
Dob: 2010/10/20 (U16)
Gender: Male
Chess SA id: 110088674
FIDE id:
Region: Buffalo City (EBC)
Citizen: RSA
Title(s):
Last active: 2024/05/04 (9 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 rating1554.2
Curent Weighted rating1534.9
Curent Weighted performance1446.5
Current official/published rating (highest between Raw, WR and WP)1554.2
Current floor (min rating allowed)1116.8
Current highest rating achieved1616.8
Current K-factor28
Games played this month14
Score (S)8.5
Expected score (We)7.53
Difference (S-We)0.97
Current Raw change (no limits, including tournament time weight)30.3
Current min/max change allowed (with limits)±100.1
Current Raw change used (final)30.3
Projected new Raw rating1584.5
Projected new Weighed rating1540.6
Projected new Weighted performance1446.5
Projected new official/published rating (highest between new Raw, new WR and new WP)1584.5
Projected effective change (new Official - current Official)+30.3
Projected new highest rating1616.8
Projected new floor1116.8
Projected new K-facor28
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 rating1556.8
Curent Weighted rating1526.9
Curent Weighted performance1466.2
Current official/published rating (highest between Raw, WR and WP)1556.8
Current floor (min rating allowed)1117.1
Current highest rating achieved1617.1
Current K-factor28
Games played this month14
Score (S)8.5
Expected score (We)7.69
Difference (S-We)0.81
Current Raw change (no limits, including tournament time weight)22.7
Current min/max change allowed (with limits)±99.7
Current Raw change used (final)22.7
Projected new Raw rating1579.5
Projected new Weighed rating1533.0
Projected new Weighted performance1466.2
Projected new official/published rating (highest between new Raw, new WR and new WP)1579.5
Projected effective change (new Official - current Official)+22.7
Projected new highest rating1617.1
Projected new floor1117.1
Projected new K-facor28
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 rating1249.0
Curent Weighted rating1187.6
Curent Weighted performance1010.5
Current official/published rating (highest between Raw, WR and WP)1249.0
Current floor (min rating allowed)749.0
Current highest rating achieved1249.0
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)±154.6
Current Raw change used (final)0.0
Projected new Raw rating1249.0
Projected new Weighed rating1194.3
Projected new Weighted performance1010.5
Projected new official/published rating (highest between new Raw, new WR and new WP)1249.0
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1249.0
Projected new floor749.0
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 rating1257.6
Curent Weighted rating998.7
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1257.6
Current floor (min rating allowed)749.0
Current highest rating achieved1257.6
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)±152.8
Current Raw change used (final)0.0
Projected new Raw rating1257.6
Projected new Weighed rating1024.4
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1257.6
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1257.6
Projected new floor749.0
Projected new K-facor36
Tournaments
Tournament: BC Chess HS Trials 3 2024 (U18-Adult)
Start: 2024/05/04  End: 2024/05/04  Host: EBC  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 5
Games: 5  Score: 3.0
Main rating: 1554.2  Rating gain/loss: -15.1
Type rating: 1556.8  Rating gain/loss: -19.3
Analysis
Tournament: South African Junior Closed Chess Championship 2024 (U14 Open)
Start: 2024/04/27  End: 2024/05/01  Host: GE  Type: Standard   Time: 120  Time weight: 1.00  Rounds: 9
Games: 9  Score: 5.5
Main rating: 1554.2  Rating gain/loss: 45.4
Type rating: 1556.8  Rating gain/loss: 42.0
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
5 BC Chess HS Trials 3 2024 (U18-Adult) 2024/05/04 2024/05/04 Buffalo City (EBC) Standard 60 0.83 5 5 3.0 1554.2 1556.8 Analysis
4 South African Junior Closed Chess Championship 2024 (U14 Open) 2024/04/27 2024/05/01 Ekurhuleni (GE) Standard 120 1.00 9 9 5.5 1554.2 1556.8 Analysis
3 UFH Open 2024 (A) 2024/04/13 2024/04/14 Amathole (EAL) Standard 90 0.94 7 7 4.0 1529.2 1526.0 Analysis
2 Grey College Team Championship 2024 (A) 2024/02/23 2024/02/24 Mangaung (FMB) Standard 60 0.83 5 5 2.5 1543.6 1545.9 Analysis
1 Chess Vikings VP-Mall Blitz 2024 (A) 2024/01/27 2024/01/27 Buffalo City (EBC) Blitz 8 0.25 9 9 4.0 1554.2 1226.6 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
81 BC Chess HS Trials 3 2024 (U18-Adult) 2024/05/04 2024/05/04 Buffalo City (EBC) Standard 60 0.83 5 5 3.0 1554.2 1556.8 Analysis
80 South African Junior Closed Chess Championship 2024 (U14 Open) 2024/04/27 2024/05/01 Ekurhuleni (GE) Standard 120 1.00 9 9 5.5 1554.2 1556.8 Analysis
79 UFH Open 2024 (A) 2024/04/13 2024/04/14 Amathole (EAL) Standard 90 0.94 7 7 4.0 1529.2 1526.0 Analysis
78 Grey College Team Championship 2024 (A) 2024/02/23 2024/02/24 Mangaung (FMB) Standard 60 0.83 5 5 2.5 1543.6 1545.9 Analysis
77 Chess Vikings VP-Mall Blitz 2024 (A) 2024/01/27 2024/01/27 Buffalo City (EBC) Blitz 8 0.25 9 9 4.0 1554.2 1226.6 Analysis
76 Chess Vikings Exam Rapid 2023 (A) 2023/11/04 2023/11/04 Buffalo City (EBC) Rapid 20 0.47 7 6 2.5 1556.8 1144.0 Analysis
75 4th BC HS Trials 2023 (U18A-Adult) 2023/08/26 2023/08/26 Cape Winelands (WCW) Standard 60 0.83 5 5 3.0 1576.3 1568.9 Analysis
74 2023 SA Schools Winter Games (U15 Open) 2023/07/04 2023/07/06 West Rand (GWR) Standard 65 0.85 7 7 3.5 1616.8 1617.1 Analysis
73 Youth Day Chess Festival 2023 (B) 2023/06/24 2023/06/24 Buffalo City (EBC) Standard 90 0.94 5 5 5.0 1481.8 1471.3 Analysis
72 2023 EC Schools Provincial Winter Games (U15 Boys) 2023/06/02 2023/06/03 Buffalo City (EBC) Standard 60 0.83 6 6 5.0 1481.8 1471.3 Analysis
71 2023 BCM Schools Winter Games District Championships (U15 Boys) 2023/05/20 2023/05/20 Buffalo City (EBC) Standard 60 0.83 5 5 3.5 1457.6 1433.9 Analysis
70 EL Schools Winter Trials 2023 (U15 Boys) 2023/05/13 2023/05/13 Buffalo City (EBC) Standard 60 0.83 5 5 4.0 1457.6 1433.9 Analysis
69 BC Chess Trials 1 of 5 2023 (Prestige) 2023/04/29 2023/04/29 Buffalo City (EBC) Standard 60 0.83 5 4 0.0 1494.0 1473.6 Analysis
68 2023 South African Junior Closed Chess Championships (U14 Open) 2023/03/31 2023/04/04 Chess South Africa (CSA) Standard 120 1.00 9 9 4.5 1494.0 1473.6 Analysis
67 3rd Vikings Champs 2023 (Prestige) 2023/03/25 2023/03/25 Buffalo City (EBC) Standard 60 0.83 5 5 2.5 1501.2 1480.0 Analysis
66 2nd Master Vikings 2023 2023/02/23 2023/02/23 Buffalo City (EBC) Standard 60 0.83 5 5 2.0 1536.8 1524.5 Analysis
65 Master Vikings 2023 2023/02/11 2023/02/11 Buffalo City (EBC) Standard 60 0.83 5 5 2.0 1536.8 1524.5 Analysis
64 2022 South African Junior Wild Card Chess Championships (U14 Open) 2022/12/09 2022/12/12 4 Knights (4K) Standard 120 1.00 7 7 6.0 1443.7 1428.5 Analysis
63 2022 South African Junior Team Chess Championships (U14 Open) 2022/12/04 2022/12/08 4 Knights (4K) Standard 120 1.00 7 7 4.0 1443.7 1428.5 Analysis
62 Slum Knights 5th 2022 (Open) 2022/10/22 2022/10/22 Buffalo City (EBC) Standard 60 0.83 5 5 3.0 1436.3 1419.2 Analysis
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Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 35 16 6 13 19.0 54.3 36.4 1515.5 1552.0
White 17 6 5 6 8.5 50.0 0.0 1514.4 1514.4
Black 18 10 1 7 10.5 58.3 70.8 1516.6 1587.4
Standard All 26 12 6 8 15.0 57.7 65.4 1534.2 1599.6
White 12 5 5 2 7.5 62.5 106.3 1517.4 1623.6
Black 14 7 1 6 7.5 53.6 30.4 1548.7 1579.0
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 9 4 0 5 4.0 44.4 -47.2 1461.5 1414.3
White 5 1 0 4 1.0 20.0 -255.0 1507.3 1252.3
Black 4 3 0 1 3.0 75.0 212.5 1404.3 1616.8
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 484 253 26 205 266.0 55.0 42.1 1226.7 1268.8
White 238 123 14 101 130.0 54.6 39.3 1225.2 1264.5
Black 246 130 12 104 136.0 55.3 44.9 1228.1 1273.0
Standard All 389 211 22 156 222.0 57.1 60.1 1205.7 1265.8
White 190 101 12 77 107.0 56.3 53.7 1205.1 1258.8
Black 199 110 10 79 115.0 57.8 66.2 1206.2 1272.5
Rapid All 70 30 4 36 32.0 45.7 -36.4 1299.4 1263.0
White 35 16 2 17 17.0 48.6 -12.1 1287.1 1275.0
Black 35 14 2 19 15.0 42.9 -60.7 1311.7 1251.0
Blitz All 25 12 0 13 12.0 48.0 -17.0 1350.3 1333.3
White 13 6 0 7 6.0 46.2 -32.7 1353.6 1320.9
Black 12 6 0 6 6.0 50.0 0.0 1346.6 1346.6
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 1070104009 Sibanda, T (Takudzwa) 11 2.0 2 0 9 18.2 1325.6 -270.5 1055.1 View list
2 108088680 Pearson, E (Ethan) 9 4.5 4 1 4 50.0 1369.2 0.0 1369.2 View list
3 106065267 Becker, M (Matthew) 9 1.0 1 0 8 11.1 1255.9 -330.6 925.3 View list
4 1070099423 Lin, C (Chenyi) 9 0.5 0 1 8 5.6 1307.8 -377.8 930.0 View list
5 207065272 Dove, M (Megan) 8 6.5 6 1 1 81.3 1179.2 265.6 1444.8 View list
6 105065320 Sparg, N (Nathan) 8 0.0 0 0 8 0.0 1342.9 -425.0 917.9 View list
7 1100100199 Botha, T (Tyler) 7 4.5 4 1 2 64.3 1403.2 121.4 1524.7 View list
8 108088678 Pearson, D (Dane) 6 5.0 4 2 0 83.3 1419.9 283.3 1703.2 View list
9 104043328 Xongwana, S (Sahlulelo) 6 1.0 1 0 5 16.7 1126.5 -283.3 843.2 View list
10 106065282 Meise, K (Keagen) 6 0.5 0 1 5 8.3 1400.6 -354.2 1046.4 View list
11 106059113 Chang, S (Sebastian) 6 0.0 0 0 6 0.0 1228.5 -425.0 803.5 View list
12 1060104008 Totose, Z (Zimi) 6 0.0 0 0 6 0.0 1248.5 -425.0 823.5 View list
13 106078250 De Villiers, E (Ethan) 5 4.0 4 0 1 80.0 1272.0 255.0 1527.0 View list
14 1070105515 Voyi, O (Onesimo) 5 4.0 4 0 1 80.0 1376.0 255.0 1631.0 View list
15 1120109254 Mazikana, E (Ethan) 5 3.0 3 0 2 60.0 1452.9 85.0 1537.9 View list
16 1060104005 Ndlebe, A (Anda) 5 3.0 3 0 2 60.0 1218.8 85.0 1303.8 View list
17 105054349 Wang, I (Ikai) 5 1.5 1 1 3 30.0 1195.2 -170.0 1025.2 View list
18 110091704 Levitan, J (Judah) 5 1.0 1 0 4 20.0 1048.2 -255.0 793.2 View list
19 206044986 Wang, P-S (Pei-Shan) 5 1.0 1 0 4 20.0 1134.1 -255.0 879.1 View list
20 2060098046 Jacobs, E (Elsje) 4 3.0 3 0 1 75.0 1287.0 212.5 1499.5 View list