| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. N J Kalton vs Hartston |
| 1-0 | 27 |
1962 |
Correspondence game | B06 Robatsch |
| 2. Hartston vs R C Moss |
| 1-0 | 30 |
1962 |
U18 Counties Correspondence Championships, Buckinghamshire v | C30 King's Gambit Declined |
| 3. Hartston vs A Riley |
| 1-0 | 42 |
1962 |
Whitby British u15 ch | A16 English |
| 4. Hartston vs DL Roth |
| 1-0 | 22 |
1963 |
BCF-ch U18 | B45 Sicilian, Taimanov |
| 5. Keene vs Hartston |
  | 1-0 | 27 |
1964 |
London U-18 Championship | A04 Reti Opening |
| 6. Hartston vs D Parr |
| 1-0 | 31 |
1965 |
BCF-ch | A00 Uncommon Opening |
| 7. Hartston vs H Glauser |
| 1-0 | 29 |
1965 |
NLD | C34 King's Gambit Accepted |
| 8. Hartston vs Gligoric |
| 1-0 | 25 |
1965 |
Hastings 6566 | B97 Sicilian, Najdorf |
| 9. Hartston vs J Littlewood |
| 1-0 | 46 |
1965 |
Ilford | C35 King's Gambit Accepted, Cunningham |
| 10. Vasiukov vs Hartston |
| 1-0 | 24 |
1965 |
Hastings 6566 | B31 Sicilian, Rossolimo Variation |
| 11. Hartston vs I Radulov |
| 1-0 | 73 |
1966 |
Orebro Stud olm fA | C78 Ruy Lopez |
| 12. M Czerniak vs Hartston |
| 1-0 | 24 |
1966 |
Hastings 6667 | C01 French, Exchange |
| 13. Hartston vs I Farago |
| 1-0 | 41 |
1966 |
Orebro Stud olm fA | C00 French Defense |
| 14. Hartston vs J Aijala |
| 1-0 | 41 |
1966 |
Orebro Stud olm fA | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 15. Hartston vs Golombek |
| 1-0 | 44 |
1967 |
BCF-ch | B19 Caro-Kann, Classical |
| 16. P Ostojic vs Hartston |
| 1-0 | 50 |
1967 |
Hastings 1967/68 | B89 Sicilian |
| 17. Hartston vs F Parr |
| 1-0 | 23 |
1967 |
BCF-ch | B06 Robatsch |
| 18. Hartston vs M Basman |
| 1-0 | 67 |
1967 |
Hastings 1967/68 | B07 Pirc |
| 19. Hartston vs F Kuijpers |
| 1-0 | 55 |
1967 |
Clare Benedict Cup 14th | C46 Three Knights |
| 20. Hartston vs W Tabakiernik |
| 1-0 | 41 |
1967 |
BCF-ch | C63 Ruy Lopez, Schliemann Defense |
| 21. Hartston vs J R Phillips |
| 1-0 | 17 |
1967 |
BCF-ch | B32 Sicilian |
| 22. Timman vs Hartston |
| 1-0 | 39 |
1967 |
The Hague tt jr | D03 Torre Attack (Tartakower Variation) |
| 23. Balashov vs Hartston |
| 1-0 | 64 |
1967 |
Hastings | E91 King's Indian |
| 24. Keene vs Hartston |
| 1-0 | 54 |
1968 |
Tournament | A05 Reti Opening |
| 25. Stein vs Hartston |
| 1-0 | 35 |
1968 |
Hastings 1967/68 | A34 English, Symmetrical |
