PLAYER PAGE
Stephen Porteous
1080139930Tshwane (GTP)Personal
Main rating
| Rating | 1307.4 |
| K-factor | 36 |
| Floor | 807.4 |
| Highest | 1307.4 (2026-09-01) |
| Min/Max +/- allowed | 142 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1294.9 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1307.4 |
| K-factor | 36 |
| Floor | 807.4 |
| Highest | 1307.4 (2026-09-01) |
| Min/Max +/- allowed | 142.3 |
Standard rating
| Rating | 1314.6 |
| K-factor | 36 |
| Floor | 814.6 |
| Highest | 1314.6 (2026-09-01) |
| Min/Max +/- allowed | 140.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1294.9 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1314.6 |
| K-factor | 36 |
| Floor | 814.6 |
| Highest | 1314.6 (2026-09-01) |
| Min/Max +/- allowed | 140.8 |
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 |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 Etienne Lewis (U20) | Standard | 2026-08-08 | 2026-08-10 | Tshwane (GTP) | 7 | 1307.4 | 6 | 2 | 1264.7 | 0.7 | Details |
| 2 | 2026 Jacaranda Round Robin Open Chess Tournament (K) | Standard | 2026-08-01 | 2026-08-01 | Tshwane (GTP) | 5 | 1307.4 | 5 | 4 | 1517.5 | 46.5 | Details |
| 3 | 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 |
| 4 | 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 |
| 5 | 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 |
| 6 | 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 |
| 7 | 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 |
| 8 | 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 |
| 9 | 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 |
| 10 | 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 |
| 11 | 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 |
| 12 | 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 |
| 13 | 2024 Etienne Lewis (U18+U20) | Standard | 2024-08-30 | 2024-09-01 | Tshwane (GTP) | 7 | 1088.5 | 6 | 0 | 956 | -16.5 | Details |
| 14 | 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 |
| 15 | 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 |
| 16 | 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 | 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 | 31 |
| Wins | 16 |
| Draws | 3 |
| Losses | 12 |
| White | 16 |
| Black | 15 |
| White wins | 11 |
| Black wins | 5 |
| Score | 17.5 |
| Percent | 56.5 |
| Dp | 54.8 |
| AOR | 1276.1 |
| Performance | 1331 |
Game statistics (History)
| Games | 79 |
| Wins | 21 |
| Draws | 3 |
| Losses | 55 |
| White | 38 |
| Black | 41 |
| White wins | 14 |
| Black wins | 7 |
| Score | 22.5 |
| Percent | 28.5 |
| Dp | -182.9 |
| AOR | 1307.3 |
| Performance | 1124.4 |
Rankings (Main)
| National | |
| Overall | 5992 |
| Gender | 4916 |
| Age group | 708 |
| Gender/Age | 596 |
| Provincial | |
| Overall | 2046 |
| Gender | 1679 |
| Age group | 241 |
| Gender/Age | 205 |
| Regional | |
| Overall | 681 |
| Gender | 563 |
| Age group | 82 |
| Gender/Age | 69 |
Rankings (Standard)
| National | |
| Overall | 5115 |
| Gender | 4177 |
| Age group | 607 |
| Gender/Age | 511 |
| Provincial | |
| Overall | 1826 |
| Gender | 1502 |
| Age group | 212 |
| Gender/Age | 179 |
| Regional | |
| Overall | 641 |
| Gender | 529 |
| Age group | 80 |
| Gender/Age | 68 |
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 | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 31 |
| Score | 17.5 |
| Percent | 56.5 |
| Aor | 1276.1 |
| Dp | 54.8 |
| Prat | 1331 |
Performance (12 months)
| Games | 39 |
| Score | 17.5 |
| Percent | 44.9 |
| Aor | 1318.8 |
| Dp | -43.6 |
| Prat | 1275.2 |
Performance (History)
| Games | 79 |
| Score | 22.5 |
| Percent | 28.5 |
| Aor | 1307.3 |
| Dp | -182.9 |
| Prat | 1124.4 |
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 | Tivane, VL (Violet Lebo) | 2 | 0 | 2 | 2024 Etienne Lewis (U18+U20) | 2026 Etienne Lewis (U20) | Details |
| Overall | 3 | Rapudi, B (Bokang) | 2 | 2 | 0 | 2026 Tshwane Chess Registration Tournament (D1) | 2026 Etienne Lewis (U20) | Details |
| Overall | 4 | Stolp, T (Tiaan) | 2 | 1 | 1 | 2024 Etienne Lewis (U18+U20) | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U17) | Details |
| Overall | 5 | Lodi, I (Isagoentle) | 2 | 1 | 1 | 2024 Etienne Lewis (U18+U20) | 2026 Etienne Lewis (U20) | 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 | Tivane, VL (Violet Lebo) | 2 | 0 | 2 | 2024 Etienne Lewis (U18+U20) | 2026 Etienne Lewis (U20) | Details |
| Standard | 3 | Rapudi, B (Bokang) | 2 | 2 | 0 | 2026 Tshwane Chess Registration Tournament (D1) | 2026 Etienne Lewis (U20) | Details |
| Standard | 4 | 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 | 5 | Lodi, I (Isagoentle) | 2 | 1 | 1 | 2024 Etienne Lewis (U18+U20) | 2026 Etienne Lewis (U20) | Details |