PLAYER PAGE
Sergio Williams
1050110213West Coast (WCU)Personal
Main rating
| Rating | 1338.8 |
| K-factor | 36 |
| Floor | 855.2 |
| Highest | 1355.2 (2025-09-01) |
| Min/Max +/- allowed | 133 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1192.9 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1338.8 |
| K-factor | 36 |
| Floor | 855.2 |
| Highest | 1355.2 (2025-09-01) |
| Min/Max +/- allowed | 132.9 |
Standard rating
| Rating | 1250.3 |
| K-factor | 36 |
| Floor | 754.8 |
| Highest | 1254.8 (2024-09-01) |
| Min/Max +/- allowed | 153.4 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1019.3 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1250.3 |
| K-factor | 36 |
| Floor | 754.8 |
| Highest | 1254.8 (2024-09-01) |
| Min/Max +/- allowed | 153.4 |
Rapid rating
| Rating | 1345.6 |
| K-factor | 36 |
| Floor | 845.6 |
| Highest | 1345.6 (2025-09-01) |
| Min/Max +/- allowed | 134.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1196.5 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1345.6 |
| K-factor | 36 |
| Floor | 845.6 |
| Highest | 1345.6 (2025-09-01) |
| Min/Max +/- allowed | 134.8 |
Blitz rating
| Rating | 974 |
| K-factor | 40 |
| Floor | 500 |
| Highest | 1200 (2024-02-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 974 |
| K-factor | 40 |
| Floor | 500 |
| Highest | 1200 (2024-02-01) |
| Min/Max +/- allowed | 165.8 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Rooibos Open 2025 (Elite) | Standard | 2025-08-30 | 2025-08-30 | West Coast (WCU) | 5 | 1355.2 | 5 | 1.5 | 1244.1 | 0 | Details |
| 2 | Western Cape Women’s Championship 2025 (Sunday Rapid) | Rapid | 2025-08-10 | 2025-08-10 | West Coast (WCU) | 5 | 1341.6 | 5 | 3 | 1485.4 | 0 | Details |
| 3 | The Rooibos Open 2024 (Elite) | Rapid | 2024-08-24 | 2024-08-24 | West Coast (WCU) | 5 | 1328.2 | 5 | 3 | 1413 | 0 | Details |
| 4 | Western Cape Women’s Championship 2024 (Intermediate) | Standard | 2024-08-10 | 2024-08-10 | West Coast (WCU) | 5 | 1347 | 5 | 2.5 | 1231.8 | 0 | Details |
| 5 | Basil Ellman Rapid 2023 (B) | Rapid | 2023-09-30 | 2023-09-30 | West Coast (WCU) | 5 | 1302.5 | 5 | 4.5 | 1645.5 | 0 | Details |
| 6 | Western Cape Woman`s Championship 2022 (Open) | Standard | 2022-09-02 | 2022-09-04 | West Coast (WCU) | 5 | 1241.6 | 5 | 4 | 1541.3 | 0 | Details |
| 7 | Deep Blue Chess Club 2022 (Elite) | Rapid | 2022-08-20 | 2022-08-20 | West Coast (WCU) | 5 | 1218.9 | 5 | 3 | 1404.8 | 0 | Details |
| 8 | Onder-Weskus Top Skole 2022 (Hoerskool) | Rapid | 2022-06-04 | 2022-06-04 | West Coast (WCU) | 5 | 1238.8 | 4 | 3 | 1372.1 | 0 | Details |
| 9 | Basil Ellman Annual Rapid 2022 (Bear 2) | Rapid | 2022-06-25 | 2022-06-25 | West Coast (WCU) | 5 | 1238.8 | 5 | 2 | 965.4 | 0 | Details |
| 10 | Western Cape Schools Chess 2022 (U18 Boys) | Standard | 2022-05-07 | 2022-05-08 | Eden (WEG) | 6 | 1255 | 6 | 2.5 | 1178.6 | 0 | Details |
| 11 | West Coast Schools Prestige 2022 (U18 Boys) | Standard | 2022-02-19 | 2022-02-19 | West Coast (WCU) | 6 | 1240.7 | 6 | 4 | 1306.9 | 0 | Details |
| 12 | Western Cape Women`s Month Tournament 2021 (Championship) | Standard | 2021-08-06 | 2021-08-09 | West Coast (WCU) | 6 | 1241 | 5 | 2 | 1235 | 0 | Details |
| 13 | West Coast Open 2021 (Open) | Rapid | 2021-06-26 | 2021-06-26 | West Coast (WCU) | 6 | 1202.2 | 5 | 4 | 1512.5 | 0 | Details |
| 14 | Lower West Coast 2021 (U18 Boys) | Rapid | 2021-04-10 | 2021-04-10 | West Coast (WCU) | 5 | 1149.9 | 5 | 4 | 1581.7 | 0 | Details |
| 15 | Lower West Coast 2021 (U18 Boys) | Rapid | 2021-04-10 | 2021-04-10 | West Coast (WCU) | 5 | 1149.9 | 1 | 0 | 775 | 0 | Details |
| 16 | West Coast Schools Prestige 2020 (U15 Boys) | Rapid | 2020-03-07 | 2020-03-07 | West Coast (WCU) | 5 | 1135.7 | 5 | 2 | 1228.9 | 0 | Details |
| 17 | Onder Weskus Prestige 2020 (U15 Boys) | Standard | 2020-02-15 | 2020-02-22 | West Coast (WCU) | 6 | 1094.6 | 5 | 3 | 1255.4 | 0 | Details |
| 18 | West Coast Club Champs 2019 (A) | Standard | 2019-09-13 | 2019-09-14 | West Coast (WCU) | 5 | 1067.1 | 5 | 2 | 1196.6 | 0 | Details |
| 19 | Western Cape Womans Month Tournament 2019 (C) | Standard | 2019-08-09 | 2019-08-11 | West Coast (WCU) | 7 | 1010 | 6 | 4 | 1242.2 | 0 | Details |
| 20 | Weskus Topskole 2019 (U15) | Rapid | 2019-07-20 | 2019-07-20 | West Coast (WCU) | 5 | 974.7 | 5 | 3 | 1219.1 | 0 | Details |
| 21 | Onder-Weskus Skole Proewe 2019 (O15 Seuns) | Rapid | 2019-02-16 | 2019-02-23 | West Coast (WCU) | 8 | 974 | 7 | 2 | 984.8 | 0 | Details |
Game statistics ( )
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics ()
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics (History)
| Games | 105 |
| Wins | 55 |
| Draws | 8 |
| Losses | 42 |
| White | 52 |
| Black | 59 |
| White wins | 28 |
| Black wins | 31 |
| Score | 59 |
| Percent | 56.2 |
| Dp | 52.6 |
| AOR | 1245.7 |
| Performance | 1298.3 |
Rankings (Main)
| National | |
| Overall | 4721 |
| Gender | 3951 |
| Age group | 1273 |
| Gender/Age | 1167 |
| Provincial | |
| Overall | 1442 |
| Gender | 1149 |
| Age group | 350 |
| Gender/Age | 319 |
| Regional | |
| Overall | 124 |
| Gender | 93 |
| Age group | 22 |
| Gender/Age | 18 |
Rankings (Standard)
| National | |
| Overall | 7194 |
| Gender | 5780 |
| Age group | 1403 |
| Gender/Age | 1256 |
| Provincial | |
| Overall | 2016 |
| Gender | 1527 |
| Age group | 348 |
| Gender/Age | 308 |
| Regional | |
| Overall | 132 |
| Gender | 93 |
| Age group | 24 |
| Gender/Age | 20 |
Rankings (Rapid)
| National | |
| Overall | 1277 |
| Gender | 1078 |
| Age group | 292 |
| Gender/Age | 275 |
| Provincial | |
| Overall | 621 |
| Gender | 510 |
| Age group | 122 |
| Gender/Age | 114 |
| Regional | |
| Overall | 130 |
| Gender | 98 |
| Age group | 13 |
| Gender/Age | 12 |
Rankings (Blitz)
| National | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Provincial | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Regional | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
Performance ( )
| Games | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance (12 months)
| Games | 10 |
| Score | 4.5 |
| Percent | 45 |
| Aor | 1407.2 |
| Dp | -42.5 |
| Prat | 1364.8 |
Performance (History)
| Games | 105 |
| Score | 59 |
| Percent | 56.2 |
| Aor | 1245.7 |
| Dp | 52.6 |
| Prat | 1298.3 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Kariem, S (Shakir) | 4 | 3 | 1 | West Coast Club Champs 2019 (A) | Rooibos Open 2025 (Elite) | Details |
| Overall | 2 | Hogan, L (Lee) | 3 | 1 | 2 | Onder-Weskus Skole Proewe 2019 (O15 Seuns) | Onder-Weskus Top Skole 2022 (Hoerskool) | Details |
| Overall | 3 | Schroeder, C (Carl) | 3 | 1 | 2 | Weskus Topskole 2019 (U15) | Lower West Coast 2021 (U18 Boys) | Details |
| Overall | 4 | Lewaks, S (Shaundre) | 2 | 0 | 2 | Western Cape Women`s Month Tournament 2021 (Championship) | Western Cape Woman`s Championship 2022 (Open) | Details |
| Overall | 5 | Hendricks, M (Marquin) | 2 | 0 | 2 | West Coast Club Champs 2019 (A) | Lower West Coast 2021 (U18 Boys) | Details |
| Standard | 1 | Kariem, S (Shakir) | 3 | 2 | 1 | West Coast Club Champs 2019 (A) | Rooibos Open 2025 (Elite) | Details |
| Standard | 2 | Minnaar, E (Ethan) | 2 | 0 | 2 | Western Cape Women`s Month Tournament 2021 (Championship) | Rooibos Open 2025 (Elite) | Details |
| Standard | 3 | Lewaks, S (Shaundre) | 2 | 0 | 2 | Western Cape Women`s Month Tournament 2021 (Championship) | Western Cape Woman`s Championship 2022 (Open) | Details |
| Rapid | 1 | Schroeder, C (Carl) | 3 | 1 | 2 | Weskus Topskole 2019 (U15) | Lower West Coast 2021 (U18 Boys) | Details |
| Rapid | 2 | Van Wyk, C (Charlton) | 2 | 0 | 2 | Lower West Coast 2021 (U18 Boys) | Lower West Coast 2021 (U18 Boys) | Details |
| Rapid | 3 | Hogan, L (Lee) | 2 | 0 | 2 | Onder-Weskus Skole Proewe 2019 (O15 Seuns) | Onder-Weskus Top Skole 2022 (Hoerskool) | Details |
| Rapid | 4 | Williams, V (Vogan) | 2 | 1 | 1 | Onder-Weskus Skole Proewe 2019 (O15 Seuns) | Onder-Weskus Top Skole 2022 (Hoerskool) | Details |