Player Page

Vorster, SPM (Stephanus)
Dob: 1969/10/16 (Adult)
Gender: Male
Chess SA id: 169042155
FIDE id: Vorster
Region: Bojanala Platina (NBR)
Citizen: RSA
Title(s):
Last active: 2024/07/21 (6 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 rating1685.8
Current Weighted rating1750.2
Current Weighted performance1482.5
Current official/published rating (highest between Raw, WR and WP)1750.2
Current highest rating achieved1820.4
Current floor (min rating allowed)1320.4
Current K-factor24
Games played this month10
Score (S)6.5
Expected score (We)5.68
Difference (S-We)0.68
Current Raw change (no limits, including tournament time weight)16.3
Current min/max change allowed (with limits)±83.0
Current Raw change used (final)16.3
Projected new Raw rating1702.1
Projected new Weighed rating1608.2
Projected new Weighted performance1694.3
Projected new final Raw rating (if new WP > new Raw)1702.1
Projected new highest rating1820.4
Projected new floor1320.4
Projected new K-facor24
Projected new official/published rating (highest between new Raw, new WR and new WP)1702.1
Projected effective change (new Official - current Official)-48.1
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 rating1655.5
Current Weighted rating1733.5
Current Weighted performance1421.1
Current official/published rating (highest between Raw, WR and WP)1733.5
Current highest rating achieved1821.2
Current floor (min rating allowed)1321.2
Current K-factor24
Games played this month10
Score (S)6.5
Expected score (We)5.41
Difference (S-We)1.09
Current Raw change (no limits, including tournament time weight)26.2
Current min/max change allowed (with limits)±86.7
Current Raw change used (final)26.2
Projected new Raw rating1681.7
Projected new Weighed rating1592.3
Projected new Weighted performance1653.1
Projected new final Raw rating (if new WP > new Raw)1681.7
Projected new highest rating1821.2
Projected new floor1321.2
Projected new K-facor24
Projected new official/published rating (highest between new Raw, new WR and new WP)1681.7
Projected effective change (new Official - current Official)-51.8
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 rating1761.7
Current Weighted rating1790.7
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1790.7
Current highest rating achieved1793.3
Current floor (min rating allowed)1293.3
Current K-factor28
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)±74.5
Current Raw change used (final)0.0
Projected new Raw rating1761.7
Projected new Weighed rating1647.4
Projected new Weighted performance896.0
Projected new final Raw rating (if new WP > new Raw)1761.7
Projected new highest rating1793.3
Projected new floor1293.3
Projected new K-facor28
Projected new official/published rating (highest between new Raw, new WR and new WP)1761.7
Projected effective change (new Official - current Official)-29.0
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 rating1789.0
Current Weighted rating1788.4
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1789.0
Current highest rating achieved1789.0
Current floor (min rating allowed)1289.0
Current K-factor28
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)±71.6
Current Raw change used (final)0.0
Projected new Raw rating1789.0
Projected new Weighed rating1645.3
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1789.0
Projected new floor1289.0
Projected new K-facor28
Projected new official/published rating (highest between new Raw, new WR and new WP)1789.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Tournament: Incognito Invitational 2024 (A)
Start: 2024/07/21  End: 2024/07/21  Host: NBR  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 5
Games: 5  Score: 4.0
Main rating: 1685.8  Rating gain/loss: 30.7
Type rating: 1655.5  Rating gain/loss: 40.1
Analysis
Tournament: Chess Power House July Open 2024 (A)
Start: 2024/07/20  End: 2024/07/20  Host: GJM  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 5
Games: 5  Score: 2.5
Main rating: 1685.8  Rating gain/loss: -14.3
Type rating: 1655.5  Rating gain/loss: -13.9
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
6 Incognito Invitational 2024 (A) 2024/07/21 2024/07/21 Bojanala Platina (NBR) Standard 60 0.83 5 5 4.0 1685.8 1655.5 Analysis
5 Chess Power House July Open 2024 (A) 2024/07/20 2024/07/20 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1685.8 1655.5 Analysis
4 Boksburg Rapid 2024 (A) 2024/05/14 2024/06/11 Ekurhuleni (GE) Rapid 30 0.60 5 5 3.0 1687.2 1793.3 Analysis
3 Spartan Bishops Chess Championships 2024 (Seniors) 2024/05/04 2024/05/05 Bojanala Platina (NBR) Standard 60 0.83 5 5 4.5 1691.4 1659.1 Analysis
2 NG Kerk Vanderbijlpark Suid 2024 (A+B) 2024/02/24 2024/02/24 Sedibeng (GSV) Standard 61 0.84 5 5 3.0 1709.7 1679.5 Analysis
1 2024 Piet Robbertse Open Chess Tournament (A) 2024/02/03 2024/02/04 Tshwane (GTP) Standard 90 0.94 5 4 0.0 1779.6 1752.2 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
37 Incognito Invitational 2024 (A) 2024/07/21 2024/07/21 Bojanala Platina (NBR) Standard 60 0.83 5 5 4.0 1685.8 1655.5 Analysis
36 Chess Power House July Open 2024 (A) 2024/07/20 2024/07/20 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1685.8 1655.5 Analysis
35 Boksburg Rapid 2024 (A) 2024/05/14 2024/06/11 Ekurhuleni (GE) Rapid 30 0.60 5 5 3.0 1687.2 1793.3 Analysis
34 Spartan Bishops Chess Championships 2024 (Seniors) 2024/05/04 2024/05/05 Bojanala Platina (NBR) Standard 60 0.83 5 5 4.5 1691.4 1659.1 Analysis
33 NG Kerk Vanderbijlpark Suid 2024 (A+B) 2024/02/24 2024/02/24 Sedibeng (GSV) Standard 61 0.84 5 5 3.0 1709.7 1679.5 Analysis
32 2024 Piet Robbertse Open Chess Tournament (A) 2024/02/03 2024/02/04 Tshwane (GTP) Standard 90 0.94 5 4 0.0 1779.6 1752.2 Analysis
31 2023 Moja Chess Extravaganza (Prestige) 2023/09/30 2023/10/04 Frances Baard (NCF) Standard 120 1.00 9 9 4.5 1740.0 1730.8 Analysis
30 Chess Power House 2023 (A) 2023/08/19 2023/08/20 Johannesburg Metro (GJM) Standard 90 0.94 5 5 2.0 1792.3 1786.2 Analysis
29 Eureka Open 2023 (A) 2023/07/29 2023/07/29 Sedibeng (GSV) Standard 60 0.83 5 5 2.5 1820.4 1821.2 Analysis
28 Boksburg Chess Club Rapid 2023 2023/06/20 2023/06/20 Ekurhuleni (GE) Rapid 30 0.60 5 1 1.0 1820.3 1793.0 Analysis
27 Chess Power House 2nd RR 2022 (A) 2022/08/20 2022/08/21 Johannesburg Metro (GJM) Standard 90 0.94 5 5 2.5 1745.4 1742.8 Analysis
26 2022 Alekhine Open (A) 2022/08/13 2022/08/14 Tshwane (GTP) Standard 90 0.94 5 5 2.0 1745.4 1742.8 Analysis
25 JMC Womens Day 2022 (FIDE Open) 2022/08/06 2022/08/09 Johannesburg Metro (GJM) Standard 120 1.00 6 6 4.0 1745.4 1742.8 Analysis
24 Chessheroes Youth Day 2022 (A1) 2022/06/16 2022/06/18 Johannesburg Metro (GJM) Standard 120 1.00 5 4 2.5 1726.6 1724.0 Analysis
23 Moja Open 2022 (Prestige) 2022/03/19 2022/03/22 Frances Baard (NCF) Standard 120 1.00 7 7 3.5 1706.4 1703.3 Analysis
22 Ekurhuleni Chess Open 2022 (A) 2022/01/07 2022/01/09 Ekurhuleni (GE) Standard 90 0.94 7 7 4.0 1734.3 1732.4 Analysis
21 NC Open 2021 (A) 2021/10/22 2021/10/24 Frances Baard (NCF) Standard 120 1.00 5 5 4.0 1716.4 1711.7 Analysis
20 Pinnacle College Waterfall Open (Premier) 2021/10/02 2021/10/03 Johannesburg Metro (GJM) Standard 90 0.94 6 6 2.5 1716.4 1711.7 Analysis
19 2021 Gauteng North Open Tournament (A) 2021/08/28 2021/08/29 Tshwane (GTP) Standard 90 0.94 5 5 2.0 1733.2 1726.5 Analysis
18 2021 Alekhine Open (A) 2021/08/14 2021/08/15 Tshwane (GTP) Standard 90 0.94 5 5 2.5 1733.2 1726.5 Analysis
12
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 29 14 6 9 17.0 58.6 73.3 1526.0 1599.3
White 16 10 3 3 11.5 71.9 185.9 1439.4 1625.3
Black 13 4 3 6 5.5 42.3 -65.4 1632.6 1567.3
Standard All 24 12 4 8 14.0 58.3 70.8 1512.2 1583.0
White 13 9 1 3 9.5 73.1 196.2 1440.3 1636.4
Black 11 3 3 5 4.5 40.9 -77.3 1597.1 1519.8
Rapid All 5 2 2 1 3.0 60.0 85.0 1592.4 1677.4
White 3 1 2 0 2.0 66.7 141.7 1435.4 1577.0
Black 2 1 0 1 1.0 50.0 0.0 1828.0 1828.0
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 194 90 44 60 112.0 57.7 65.7 1616.6 1682.4
White 98 51 20 27 61.0 62.2 104.1 1593.3 1697.3
Black 96 39 24 33 51.0 53.1 26.6 1640.5 1667.1
Standard All 168 71 40 57 91.0 54.2 35.4 1650.1 1685.5
White 84 42 17 25 50.5 60.1 86.0 1633.8 1719.8
Black 84 29 23 32 40.5 48.2 -15.2 1666.4 1651.2
Rapid All 26 19 4 3 21.0 80.8 261.5 1400.6 1662.2
White 14 9 3 2 10.5 75.0 212.5 1350.2 1562.7
Black 12 10 1 1 10.5 87.5 318.8 1459.5 1778.2
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 103007373 Dinham, J (James) 5 3.0 2 2 1 60.0 1722.4 85.0 1807.4 View list
2 187025727 Mpya, TM (Tshediso) 5 1.5 1 1 3 30.0 1739.7 -170.0 1569.7 View list
3 182025885 Mthunzi, B (Brighton) 5 1.5 1 1 3 30.0 1717.7 -170.0 1547.7 View list
4 194073176 Chueu, C (Calvin) 4 2.5 2 1 1 62.5 1725.5 106.3 1831.8 View list
5 1070104078 Price, DR (Daelen) 4 2.5 1 3 0 62.5 1740.6 106.3 1846.8 View list
6 104069713 Vorster, T (Tyrone) 4 2.0 0 4 0 50.0 1771.4 0.0 1771.4 View list
7 104053107 Govender, Y (Yaduvir) 4 1.5 0 3 1 37.5 1716.3 -106.3 1610.0 View list
8 103046660 Schroeder, D (Daniel) 3 1.0 1 0 2 33.3 1725.4 -141.7 1583.7 View list
9 101023373 Mlahleki, V (Vusimuzi) 3 0.5 0 1 2 16.7 1741.3 -283.3 1458.0 View list
10 191012376 Hercules, BV (Benjamin) 3 0.0 0 0 3 0.0 1711.1 -425.0 1286.1 View list
11 105058538 Smit, D (Devon) 3 0.0 0 0 3 0.0 1733.4 -425.0 1308.4 View list
12 194019178 Madiba, CM (Carpediem) 2 2.0 2 0 0 100.0 1717.8 425.0 2142.8 View list
13 1790140016 Monamatha, M (Moeketsi) 2 2.0 2 0 0 100.0 1688.6 425.0 2113.6 View list
14 1100103439 Mungal, E (Ethan) 2 2.0 2 0 0 100.0 1725.3 425.0 2150.3 View list
15 108076196 Potgieter, E (Edward) 2 2.0 2 0 0 100.0 1709.9 425.0 2134.9 View list
16 106053297 Govender, S (Shevern) 2 1.5 1 1 0 75.0 1707.4 212.5 1919.9 View list
17 107069948 Jones, W (William) 2 1.5 1 1 0 75.0 1739.3 212.5 1951.8 View list
18 182017839 Lesuthu, KM (Kali) 2 1.5 1 1 0 75.0 1715.3 212.5 1927.8 View list
19 155022650 Mendelsohn, DC (David) 2 1.5 1 1 0 75.0 1706.2 212.5 1918.7 View list
20 173022117 Mbedza, R (Richard) 2 1.0 1 0 1 50.0 1727.6 0.0 1727.6 View list