| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J A Lacasa Diaz vs M Manik |
| ½-½ | 31 | 2005 | Salou Open | B31 Sicilian, Rossolimo Variation |
| 27. F Peralta vs J A Lacasa Diaz |
| ½-½ | 23 | 2005 | Salou op 7th | A04 Reti Opening |
| 28. F Peralta vs J A Lacasa Diaz |
| ½-½ | 23 | 2005 | Salou Open | A04 Reti Opening |
| 29. J A Lacasa Diaz vs Korneev |
| ½-½ | 44 | 2005 | Salou Open | B41 Sicilian, Kan |
| 30. B Lalic vs J A Lacasa Diaz |
| ½-½ | 24 | 2005 | Salou Open | A62 Benoni, Fianchetto Variation |
| 31. J A Lacasa Diaz vs S Krivoshey |
| 0-1 | 100 | 2005 | Salou Open | B01 Scandinavian |
| 32. H Kallio vs J A Lacasa Diaz |
| 1-0 | 31 | 2005 | XXIII Open Andorra | E43 Nimzo-Indian, Fischer Variation |
| 33. O de la Riva Aguado vs J A Lacasa Diaz |
| 1-0 | 34 | 2005 | XXIII Open Andorra | B80 Sicilian, Scheveningen |
| 34. J A Lacasa Diaz vs Stellwagen |
| ½-½ | 55 | 2005 | Vlissingen HZ op | C11 French |
| 35. M Illescas vs J A Lacasa Diaz |
| 1-0 | 73 | 2005 | ESP-chT Honor 1 49th | B40 Sicilian |
| 36. M Narciso Dublan vs J A Lacasa Diaz |
| ½-½ | 45 | 2006 | Magistral Ciutat de Barcelona - Casino | B40 Sicilian |
| 37. J A Lacasa Diaz vs F Peralta |
| 0-1 | 40 | 2006 | Magistral Ciutat de Barcelona - Casino | B10 Caro-Kann |
| 38. Ivanchuk vs J A Lacasa Diaz |
 | 1-0 | 25 | 2006 | Magistral Ciutat de Barcelona - Casino | E10 Queen's Pawn Game |
| 39. J A Lacasa Diaz vs Bologan |
| ½-½ | 68 | 2006 | Magistral Ciutat de Barcelona - Casino | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 40. Dominguez Perez vs J A Lacasa Diaz |
| 1-0 | 47 | 2006 | Magistral Ciutat de Barcelona - Casino | B80 Sicilian, Scheveningen |
| 41. J A Lacasa Diaz vs Korneev |
| 0-1 | 62 | 2006 | Magistral Ciutat de Barcelona - Casino | C11 French |
| 42. J M Lopez Martinez vs J A Lacasa Diaz |
| 1-0 | 28 | 2006 | Magistral Ciutat de Barcelona - Casino | B82 Sicilian, Scheveningen |
| 43. Timman vs J A Lacasa Diaz |
| 0-1 | 32 | 2006 | Magistral Ciutat de Barcelona - Casino | B43 Sicilian, Kan, 5.Nc3 |
| 44. J A Lacasa Diaz vs Granda Zuniga |
| 0-1 | 28 | 2006 | Magistral Ciutat de Barcelona - Casino | C67 Ruy Lopez |
| 45. J A Lacasa Diaz vs V Moskalenko |
| ½-½ | 80 | 2011 | XXXVII Open | C18 French, Winawer |
| 46. S Maze vs J A Lacasa Diaz |
| 1-0 | 61 | 2014 | Sunway Sitges Open | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 47. J A Lacasa Diaz vs R Chalmeta Ugas |
| 0-1 | 56 | 2014 | Sunway Sitges Open | B42 Sicilian, Kan |
| 48. J A Lacasa Diaz vs E Vaarala |
| 0-1 | 23 | 2014 | Sunway Sitges Open | B30 Sicilian |
| 49. J A Lacasa Diaz vs B Dieu |
| 1-0 | 56 | 2023 | EU-ch Seniors 50 22nd | C02 French, Advance |
| 50. K Alekseenko vs J A Lacasa Diaz |
| 1-0 | 29 | 2023 | El Llobregat Open | B76 Sicilian, Dragon, Yugoslav Attack |
Kibitzing
