| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Gallagher vs E Schiller |
| 1-0 | 45 |
1981 |
Lewisham (England) | C28 Vienna Game |
| 2. Short vs J Gallagher |
 | 1-0 | 30 |
1984 |
London LB | B90 Sicilian, Najdorf |
| 3. Miles vs J Gallagher |
| 1-0 | 35 |
1984 |
British ch | A46 Queen's Pawn Game |
| 4. J Levitt vs J Gallagher |
| 1-0 | 75 |
1984 |
BCF-ch | A61 Benoni |
| 5. J Gallagher vs J Bellin |
| 1-0 | 21 |
1984 |
London | B12 Caro-Kann Defense |
| 6. A J Whiteley vs J Gallagher |
| 1-0 | 53 |
1986 |
London NWYM | A46 Queen's Pawn Game |
| 7. J Gallagher vs E Schiller |
| 1-0 | 42 |
1986 |
It (young masters) | B12 Caro-Kann Defense |
| 8. J Gallagher vs C Landenbergue |
| 1-0 | 40 |
1987 |
Geneva | B04 Alekhine's Defense, Modern |
| 9. J Gallagher vs R de Coverly |
| 1-0 | 34 |
1987 |
Leighton Buzzard | C34 King's Gambit Accepted |
| 10. J Gallagher vs P Orlov |
| 1-0 | 17 |
1988 |
Royan op | C36 King's Gambit Accepted, Abbazia Defense |
| 11. Savon vs J Gallagher |
| 1-0 | 44 |
1988 |
Baku | A49 King's Indian, Fianchetto without c4 |
| 12. Murey vs J Gallagher |
| 1-0 | 36 |
1988 |
It, Haringey | E86 King's Indian, Samisch, Orthodox, 7.Nge2 c6 |
| 13. J Gallagher vs A Davidovic |
| 1-0 | 38 |
1988 |
London m/1 | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 14. J Gallagher vs F J Sanz Alonso |
| 1-0 | 20 |
1988 |
Gijon | C34 King's Gambit Accepted |
| 15. J Gallagher vs S Jackson |
| 1-0 | 41 |
1988 |
GBR-ch Blackpool | C34 King's Gambit Accepted |
| 16. Speelman vs J Gallagher |
| 1-0 | 49 |
1988 |
St John | E77 King's Indian |
| 17. Wojtkiewicz vs J Gallagher |
| 1-0 | 48 |
1989 |
x | A04 Reti Opening |
| 18. J Gallagher vs Jansa |
| 1-0 | 37 |
1989 |
Royan | B46 Sicilian, Taimanov Variation |
| 19. J Gallagher vs G Cabrilo |
| 1-0 | 26 |
1989 |
Royan op | B68 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 9...Be7 |
| 20. Miles vs J Gallagher |
| 1-0 | 37 |
1989 |
Metz | A04 Reti Opening |
| 21. J Gallagher vs M Dzevlan |
| 1-0 | 22 |
1989 |
Royan | C30 King's Gambit Declined |
| 22. J Gallagher vs Damljanovic |
| 1-0 | 44 |
1989 |
Bern op | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 23. J Gallagher vs B Schumacher |
| 1-0 | 20 |
1989 |
Mendrisio open | C34 King's Gambit Accepted |
| 24. J Gallagher vs P Morris |
| 1-0 | 18 |
1990 |
Hastings | C36 King's Gambit Accepted, Abbazia Defense |
| 25. Petursson vs J Gallagher |
| 1-0 | 38 |
1990 |
It San Bernadino Brocco (Switzerland) | E73 King's Indian |
