| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. D Mason vs Ehlvest |
 | 1-0 | 28 |
1993 |
World Op, Philadelphia | E43 Nimzo-Indian, Fischer Variation |
| 2. D Mason vs D James |
| 1-0 | 21 |
1997 |
NCL967 Midland Mons-NW Eagles | C34 King's Gambit Accepted |
| 3. M Broomfield vs D Mason |
| 1-0 | 51 |
1999 |
Ch Great Britain, Scarborough (England) | D82 Grunfeld, 4.Bf4 |
| 4. D Mason vs S Ledger |
| 1-0 | 40 |
1999 |
Ch Great Britain, Scarborough (England) | B25 Sicilian, Closed |
| 5. N Pert vs D Mason |
| 1-0 | 37 |
1999 |
Ch Great Britain, Scarborough (England) | E63 King's Indian, Fianchetto, Panno Variation |
| 6. D Mason vs F N Stephenson |
| 1-0 | 40 |
1999 |
Ch Great Britain, Scarborough (England) | B45 Sicilian, Taimanov |
| 7. D Mason vs T Clarke |
| 1-0 | 51 |
1999 |
Ch Great Britain, Scarborough (England) | C05 French, Tarrasch |
| 8. S Knott vs D Mason |
| 1-0 | 42 |
2005 |
Smith & Williamson British Championships | E94 King's Indian, Orthodox |
| 9. C Ward vs D Mason |
| 1-0 | 34 |
2005 |
Smith & Williamson British Championships | D70 Neo-Grunfeld Defense |
| 10. Cherniaev vs D Mason |
| 1-0 | 30 |
2005 |
2nd Coventry Chess International | C02 French, Advance |
| 11. D Mason vs A Greet |
| 1-0 | 37 |
2005 |
Smith & Williamson British Championships | A16 English |
| 12. D Mason vs D Hall |
| 1-0 | 35 |
2005 |
Smith & Williamson British Championships | B01 Scandinavian |
| 13. D Mason vs C Tippleston |
| 1-0 | 42 |
2005 |
Smith & Williamson British Championships | B10 Caro-Kann |
| 14. D Mason vs P Poobalasingam |
| 1-0 | 29 |
2006 |
British Championship | C05 French, Tarrasch |
| 15. D Mason vs P Makepeace |
| 1-0 | 29 |
2007 |
British Championship | B15 Caro-Kann |
| 16. S Haslinger vs D Mason |
| 1-0 | 36 |
2007 |
British Championship | B33 Sicilian |
| 17. D Gormally vs D Mason |
| 1-0 | 43 |
2010 |
British Championship | A45 Queen's Pawn Game |
| 18. D Mason vs V Jones |
| 1-0 | 72 |
2010 |
British Championship | E15 Queen's Indian |
| 19. D Foord vs D Mason |
| 1-0 | 34 |
2010 |
Hastings Chess Congress | E36 Nimzo-Indian, Classical |
| 20. L D'Costa vs D Mason |
| 1-0 | 43 |
2010 |
4NCL | A64 Benoni, Fianchetto, 11...Re8 |
| 21. D Mason vs R Tymrakiewicz |
| 1-0 | 35 |
2010 |
British Championship | D85 Grunfeld |
| 22. M Brown vs D Mason |
| 1-0 | 39 |
2011 |
British Championships | B92 Sicilian, Najdorf, Opocensky Variation |
| 23. J Hawkins vs D Mason |
| 1-0 | 37 |
2011 |
4NCL | E10 Queen's Pawn Game |
| 24. D Mason vs C B Jenks |
| 1-0 | 25 |
2011 |
British Championships | D02 Queen's Pawn Game |
| 25. D Mason vs R Magee |
| 1-0 | 20 |
2011 |
British Championships | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
