| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O Martirosyan vs D Howell |
| 0-1 | 78 |
2001 |
WYB12 | C68 Ruy Lopez, Exchange |
| 2. J Shaw vs D Howell |
| 1-0 | 41 |
2001 |
10th Monarch Assurance | C68 Ruy Lopez, Exchange |
| 3. A Ormsby vs D Howell |
| 0-1 | 24 |
2001 |
10th Monarch Assurance | C68 Ruy Lopez, Exchange |
| 4. A Romashko vs D Howell |
| 0-1 | 50 |
2001 |
EYCC B12 | C77 Ruy Lopez |
| 5. Lahno vs D Howell |
 | 1-0 | 42 |
2002 |
World ol U16 | C96 Ruy Lopez, Closed |
| 6. N Hutchinson vs D Howell |
| 0-1 | 36 |
2002 |
British Chess Championships | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 7. D King vs D Howell |
 | 1-0 | 25 |
2003 |
Simpsons 175th | C88 Ruy Lopez |
| 8. Carlsen vs D Howell |
| ½-½ | 44 |
2003 |
Budapest FS12 GM | C86 Ruy Lopez, Worrall Attack |
| 9. Emms vs D Howell |
| ½-½ | 46 |
2003 |
Simpsons 175th | C88 Ruy Lopez |
| 10. K Arakhamia-Grant vs D Howell |
| 1-0 | 82 |
2004 |
Smith & Williamson British Championships | C65 Ruy Lopez, Berlin Defense |
| 11. Emms vs D Howell |
| ½-½ | 34 |
2004 |
Gibraltar Masters | C67 Ruy Lopez |
| 12. DeFirmian vs D Howell |
| 0-1 | 54 |
2005 |
CCA-ICC International | C88 Ruy Lopez |
| 13. Shabalov vs D Howell |
| ½-½ | 34 |
2005 |
HB Global Chess Challenge | C91 Ruy Lopez, Closed |
| 14. C Philippe vs D Howell |
| 0-1 | 31 |
2006 |
Marseille Chess Festival | C77 Ruy Lopez |
| 15. A Sokolov vs D Howell |
| 1-0 | 44 |
2006 |
TCh-FRA Top 16 Gp A | C92 Ruy Lopez, Closed |
| 16. Adams vs D Howell |
 | 1-0 | 95 |
2006 |
Howard Staunton Memorial | C80 Ruy Lopez, Open |
| 17. E Romanov vs D Howell |
| 1-0 | 54 |
2006 |
World Junior Championship | C84 Ruy Lopez, Closed |
| 18. G Kjartansson vs D Howell |
 | 0-1 | 40 |
2006 |
World Junior Championship | C88 Ruy Lopez |
| 19. N Mikkelsen vs D Howell |
| ½-½ | 24 |
2006 |
Politiken Cup | C67 Ruy Lopez |
| 20. Kotronias vs D Howell |
 | 1-0 | 48 |
2006 |
Rilton Cup | C80 Ruy Lopez, Open |
| 21. T Rendle vs D Howell |
| 0-1 | 46 |
2007 |
British Championship | C77 Ruy Lopez |
| 22. R Panjwani vs D Howell |
| 0-1 | 34 |
2007 |
Canadian Open | C60 Ruy Lopez |
| 23. J Friedel vs D Howell |
| ½-½ | 32 |
2007 |
World Open | C80 Ruy Lopez, Open |
| 24. G Rohit vs D Howell |
| 0-1 | 27 |
2007 |
World Junior Championship | C60 Ruy Lopez |
| 25. Nijboer vs D Howell |
| ½-½ | 31 |
2007 |
European Individual Championships | C80 Ruy Lopez, Open |