| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. H Ditmas vs G Sarakauskas |
| 0-1 | 27 | 2012 | London Chess Classic Open | A41 Queen's Pawn Game (with ...d6) |
| 2. F Burnham vs H Ditmas |
| ½-½ | 58 | 2012 | London Chess Classic Open | B20 Sicilian |
| 3. H Ditmas vs C Mc Aleenan |
| ½-½ | 45 | 2012 | London Chess Classic Open | A96 Dutch, Classical Variation |
| 4. H P Reutimann vs H Ditmas |
| 0-1 | 40 | 2012 | London Chess Classic Open | A46 Queen's Pawn Game |
| 5. H Ditmas vs P Tozer |
 | ½-½ | 25 | 2012 | London Chess Classic Open | A90 Dutch |
| 6. M N Anderton vs H Ditmas |
| 1-0 | 21 | 2012 | London Chess Classic Open | B22 Sicilian, Alapin |
| 7. H Ditmas vs C Nettleton |
| 1-0 | 53 | 2012 | London Chess Classic Open | D85 Grunfeld |
| 8. H Ditmas vs P K Wells |
| 0-1 | 27 | 2013 | London Chess Classic Open | E15 Queen's Indian |
| 9. J de Lagontrie vs H Ditmas |
| 0-1 | 62 | 2013 | London Chess Classic Open | E46 Nimzo-Indian |
| 10. R Britton vs H Ditmas |
| 1-0 | 34 | 2013 | London Chess Classic Open | B25 Sicilian, Closed |
| 11. H Ditmas vs K Disu |
| 1-0 | 66 | 2013 | London Chess Classic Open | A90 Dutch |
| 12. H Ditmas vs A Bird |
| 0-1 | 34 | 2013 | London Chess Classic Open | D17 Queen's Gambit Declined Slav |
| 13. S Jacob vs H Ditmas |
| 0-1 | 62 | 2013 | London Chess Classic Open | E15 Queen's Indian |
| 14. H Ditmas vs P Stanisz |
| 0-1 | 60 | 2013 | London Chess Classic Open | B33 Sicilian |
| 15. D I Arapalea vs H Ditmas |
| 0-1 | 30 | 2013 | London Chess Classic Open | B20 Sicilian |
| 16. H Ditmas vs D Okike |
| 0-1 | 66 | 2013 | London Chess Classic Open | E11 Bogo-Indian Defense |
| 17. J Dourerassou vs H Ditmas |
| 1-0 | 34 | 2014 | London Chess Classic Open | B23 Sicilian, Closed |
| 18. H Ditmas vs M Miu |
| ½-½ | 67 | 2014 | London Chess Classic Open | D30 Queen's Gambit Declined |
| 19. Andrea Terzo vs H Ditmas |
| 1-0 | 69 | 2014 | London Chess Classic Open | E20 Nimzo-Indian |
| 20. H Ditmas vs K Wandowicz |
| ½-½ | 68 | 2014 | London Chess Classic Open | A70 Benoni, Classical with 7.Nf3 |
| 21. I Kretov vs H Ditmas |
| ½-½ | 34 | 2014 | London Chess Classic Open | E33 Nimzo-Indian, Classical |
| 22. H Ditmas vs F Kebbedies |
| ½-½ | 62 | 2014 | London Chess Classic Open | E11 Bogo-Indian Defense |
| 23. J Parry vs H Ditmas |
 | 0-1 | 34 | 2014 | London Chess Classic Open | B33 Sicilian |
| 24. Aaron Viudes Serra vs H Ditmas |
| 1-0 | 64 | 2014 | London Chess Classic Open | B21 Sicilian, 2.f4 and 2.d4 |
| 25. H Ditmas vs V Wettasinha |
| 0-1 | 52 | 2014 | London Chess Classic Open | E94 King's Indian, Orthodox |
Kibitzing
