| Oct 28, 2025 | Marshall | 0–1 | Ilyes | Round 7: Marshall, Michael - Ilyes, Peter | Philidor Defense: Hanham Variation | |
| Oct 26, 2025 | Rhine | ½–½ | Marshall | Round 6: Rhine, Frederick - Marshall, Michael | Queen's Gambit Declined: Harrwitz Attack | |
| Oct 24, 2025 | Tocco | 1–0 | Marshall | Round 4: Tocco, Paolo - Marshall, Michael | Blackmar-Diemer Gambit: von Popiel Gambit | |
| Nov 20, 2024 | Marshall | 0–1 | Rooze | World Senior Chess Championship 2024 | Indian Defense | |
| Oct 26, 2023 | Marshall | * | Vidalon | 65+ World Senior Championship | ? | |
| Oct 25, 2023 | Smith | * | Marshall | 65+ World Senior Championship | ? | |
| Aug 21, 2022 | Barton | 1–0 | Marshall | Chessable British Chess Championships: Seniors 65+ | Queen's Pawn Game: Torre Attack | |
| Aug 19, 2022 | Stimpson | ½–½ | Marshall | Chessable British Chess Championships: Seniors 65+ | Rapport-Jobava System | |
| Aug 18, 2022 | Marshall | 0–1 | Footner | Chessable British Chess Championships: Seniors 65+ | Queen's Pawn Game: Accelerated London System | |
| Aug 17, 2022 | Bennett | 0–1 | Marshall | Chessable British Chess Championships: Seniors 65+ | Queen's Gambit Declined: Barmen Variation | |
| Aug 16, 2022 | Marshall | 1–0 | Selley | Chessable British Chess Championships: Seniors 65+ | Modern Defense: Standard Defense | |
| Aug 15, 2022 | Hewson | 1–0 | Marshall | Chessable British Chess Championships: Seniors 65+ | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| — | Marshall | ½–½ | Thomas | Chessable British Chess Championships: Seniors 65+ | Queen's Pawn Game: Barry Attack, Grünfeld Variation | |
| — | Marshall | 1–0 | O`mahoney | Round 2: Marshall, Michael - O`mahoney, Mike J | Queen's Pawn Game: Accelerated London System | |
| — | Marshall | 0–1 | Moore | Round 4: Marshall, Michael - Moore, Geoffrey R | Torre Attack: Fianchetto Defense | |
| — | Marshall | 1–0 | Hall | Round 6: Marshall, Michael - Hall, Alan | Indian Defense | |
| — | Varley | 1–0 | Marshall | Round 1: Varley, Peter - Marshall, Michael | Bird Opening: Dutch Variation | |
| — | Dilleigh | ½–½ | Marshall | Round 3: Dilleigh, Stephen P - Marshall, Michael | Queen's Gambit Declined: Lasker Defense | |
| — | Clancy | 1–0 | Marshall | Round 5: Clancy, Martin J - Marshall, Michael | Sicilian Defense: Taimanov Variation | |
| — | Jerome | 1–0 | Marshall | Round 7: Jerome, Stellio - Marshall, Michael | Bird Opening: Dutch Variation | |
