PLAYER PAGE
Stephen Porteous
1080139930Tshwane (GTP)Personal
Main rating
| Rating | 1275.5 |
| K-factor | 36 |
| Floor | 775.5 |
| Highest | 1275.5 (2026-03-01) |
| Min/Max +/- allowed | 149 |
| Rating Change () | |
| Games | 5 |
| Score | 2 |
| We | 2.51 |
| SWe | -0.43 |
| Temp +/- | -15.3 |
| Penalties | 0 |
| Weight perform | 1255.4 |
| Final +/- | -15.3 |
| New Rating () | |
| Rating | 1260.2 |
| K-factor | 36 |
| Floor | 775.5 |
| Highest | 1275.5 (2026-03-01) |
| Min/Max +/- allowed | 148.9 |
Standard rating
| Rating | 1275.5 |
| K-factor | 36 |
| Floor | 775.5 |
| Highest | 1275.5 (2026-03-01) |
| Min/Max +/- allowed | 148.9 |
| Rating Change () | |
| Games | 5 |
| Score | 2 |
| We | 2.52 |
| SWe | -0.52 |
| Temp +/- | -18.6 |
| Penalties | 0 |
| Weight perform | 1255.4 |
| Final +/- | -18.6 |
| New Rating () | |
| Rating | 1256.8 |
| K-factor | 36 |
| Floor | 775.5 |
| Highest | 1275.5 (2026-03-01) |
| Min/Max +/- allowed | 148.9 |
Rapid rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| 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 | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| 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 | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 D3 Tshwane North School Cluster 4&5 Individuals (U18 Mixed) | Standard | 2026-04-11 | 2026-04-11 | Tshwane (GTP) | 5 | 1275.5 | 5 | 2 | 1195.5 | -15.3 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 Lubowski Open Chess Tournament (D1) | Standard | 2026-03-21 | 2026-03-22 | Tshwane (GTP) | 5 | 1142.2 | 5 | 3 | 1303.7 | 30.5 | Details |
| 2 | 2026 Chris Greyling Open Tournament (D) | Standard | 2026-03-14 | 2026-03-14 | Tshwane (GTP) | 5 | 1142.2 | 5 | 3 | 1315.3 | 31.5 | Details |
| 3 | 2026 Tshwane Chess Registration Tournament (D1) | Standard | 2026-01-31 | 2026-01-31 | Tshwane (GTP) | 5 | 1101.6 | 5 | 3.5 | 1402.4 | 15.6 | Details |
| 4 | 2025 Mzansi Individual Championships (U18 Open) | Classical | 2025-12-17 | 2025-12-20 | Nelson Mandela Bay (ENM) | 6 | 1116 | 5 | 0 | 1107.4 | -5 | Details |
| 5 | 2025 Mzansi Inter Provincial Team Championships (U20 Open) | Standard | 2025-12-15 | 2025-12-17 | Nelson Mandela Bay (ENM) | 6 | 1116 | 3 | 0 | 979 | -9 | Details |
| 6 | 2025 Etienne Lewis Closed Chess Tournament (U18) | Standard | 2025-08-08 | 2025-08-10 | Tshwane (GTP) | 7 | 1102 | 6 | 1 | 1175.3 | 7.7 | Details |
| 7 | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U17) | Standard | 2025-07-26 | 2025-07-26 | Tshwane (GTP) | 5 | 1106.9 | 5 | 0 | 886 | -22.4 | Details |
| 8 | 2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5 (U18 Open) | Standard | 2025-05-10 | 2025-05-10 | Tshwane (GTP) | 5 | 1111.9 | 5 | 1 | 1013.4 | -9.1 | Details |
| 9 | 2025 Tshwane Chess OPEN Registration Tournament (B1) | Standard | 2025-01-25 | 2025-01-25 | Tshwane (GTP) | 5 | 1055.4 | 4 | 0 | 879.1 | -13.9 | Details |
| 10 | 2024 Etienne Lewis (U18+U20) | Standard | 2024-08-30 | 2024-09-01 | Tshwane (GTP) | 7 | 1088.5 | 6 | 0 | 956 | -16.5 | Details |
| 11 | 2024 Tshwane North School District Cluster 4 & 5 Team League (U17) | Standard | 2024-07-20 | 2024-07-20 | Tshwane (GTP) | 5 | 1122 | 5 | 1 | 943.2 | -16.8 | Details |
| 12 | District 3 Cluster 4 and 5 Individuals 2024 (U18 Boys) | Standard | 2024-05-06 | 2024-05-06 | Tshwane (GTP) | 5 | 1162.8 | 5 | 1 | 945 | -20.4 | Details |
| 13 | 2022 D3 Cluster City Schools (U15) | Standard | 2022-04-23 | 2022-04-23 | Tshwane (GTP) | 5 | 1200 | 4 | 1 | 963.2 | -18.4 | Details |
Game statistics ( )
| Games | 5 |
| Wins | 2 |
| Draws | 0 |
| Losses | 3 |
| White | 3 |
| Black | 2 |
| White wins | 2 |
| Black wins | 0 |
| Score | 2 |
| Percent | 40 |
| Dp | -85 |
| AOR | 1280.5 |
| Performance | 1195.5 |
Game statistics ()
| Games | 20 |
| Wins | 10 |
| Draws | 3 |
| Losses | 7 |
| White | 11 |
| Black | 9 |
| White wins | 8 |
| Black wins | 2 |
| Score | 11.5 |
| Percent | 57.5 |
| Dp | 63.8 |
| AOR | 1240.5 |
| Performance | 1304.2 |
Game statistics (History)
| Games | 68 |
| Wins | 15 |
| Draws | 3 |
| Losses | 50 |
| White | 33 |
| Black | 35 |
| White wins | 11 |
| Black wins | 4 |
| Score | 16.5 |
| Percent | 24.3 |
| Dp | -218.8 |
| AOR | 1301.9 |
| Performance | 1083.1 |
Rankings (Main)
| National | |
| Overall | 7252 |
| Gender | 5916 |
| Age group | 906 |
| Gender/Age | 762 |
| Provincial | |
| Overall | 2432 |
| Gender | 1984 |
| Age group | 322 |
| Gender/Age | 268 |
| Regional | |
| Overall | 817 |
| Gender | 659 |
| Age group | 103 |
| Gender/Age | 82 |
Rankings (Standard)
| National | |
| Overall | 6420 |
| Gender | 5186 |
| Age group | 799 |
| Gender/Age | 672 |
| Provincial | |
| Overall | 2273 |
| Gender | 1851 |
| Age group | 289 |
| Gender/Age | 242 |
| Regional | |
| Overall | 808 |
| Gender | 654 |
| Age group | 103 |
| Gender/Age | 85 |
Rankings (Rapid)
| 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 |
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 | 5 |
| Score | 2 |
| Percent | 40 |
| Aor | 1280.5 |
| Dp | -85 |
| Prat | 1195.5 |
Performance ()
| Games | 20 |
| Score | 11.5 |
| Percent | 57.5 |
| Aor | 1240.5 |
| Dp | 63.8 |
| Prat | 1304.2 |
Performance (12 months)
| Games | 44 |
| Score | 13.5 |
| Percent | 30.7 |
| Aor | 1325.7 |
| Dp | -164.2 |
| Prat | 1161.5 |
Performance (History)
| Games | 68 |
| Score | 16.5 |
| Percent | 24.3 |
| Aor | 1301.9 |
| Dp | -218.8 |
| Prat | 1083.1 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Makhubela, K (Kamogelo) | 2 | 0 | 2 | District 3 Cluster 4 and 5 Individuals 2024 (U18 Boys) | 2024 Tshwane North School District Cluster 4 & 5 Team League (U17) | Details |
| Overall | 2 | Stolp, T (Tiaan) | 2 | 1 | 1 | 2024 Etienne Lewis (U18+U20) | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U17) | Details |
| Standard | 1 | Makhubela, K (Kamogelo) | 2 | 0 | 2 | District 3 Cluster 4 and 5 Individuals 2024 (U18 Boys) | 2024 Tshwane North School District Cluster 4 & 5 Team League (U17) | Details |
| Standard | 2 | Stolp, T (Tiaan) | 2 | 1 | 1 | 2024 Etienne Lewis (U18+U20) | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U17) | Details |