| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H Agustsson vs H Giacomini |
| 0-1 | 54 | 2019 | Reykjavik Open | B13 Caro-Kann, Exchange |
| 27. H Giacomini vs T Finnbogadottir |
| 1-0 | 43 | 2019 | Reykjavik Open | D02 Queen's Pawn Game |
| 28. S Pedersen vs H Giacomini |
| 0-1 | 32 | 2019 | Reykjavik Open | E46 Nimzo-Indian |
| 29. H Giacomini vs M Kanarek |
| 0-1 | 34 | 2019 | Reykjavik Open | A48 King's Indian |
| 30. M Lagarde vs H Giacomini |
| 1-0 | 56 | 2019 | Reykjavik Open | A01 Nimzovich-Larsen Attack |
| 31. J Moussard vs H Giacomini |
| 1-0 | 52 | 2019 | Biel Master Open | B18 Caro-Kann, Classical |
| 32. S Gagare vs H Giacomini |
| 1-0 | 35 | 2020 | Gibraltar Masters | B12 Caro-Kann Defense |
| 33. B Kovacevic vs H Giacomini |
| 1-0 | 27 | 2020 | Gibraltar Masters | D35 Queen's Gambit Declined |
| 34. H Giacomini vs A Tang |
| 0-1 | 27 | 2021 | Biel Master Open | A06 Reti Opening |
| 35. N Stelmaszyk vs H Giacomini |
| 1-0 | 31 | 2021 | Biel Master Open | B14 Caro-Kann, Panov-Botvinnik Attack |
| 36. H Giacomini vs F Salzgeber |
| 0-1 | 56 | 2021 | Biel Master Open | A04 Reti Opening |
| 37. D Borner vs H Giacomini |
| ½-½ | 29 | 2021 | Biel Master Open | B18 Caro-Kann, Classical |
| 38. H Giacomini vs F Ferster |
| ½-½ | 50 | 2021 | Biel Master Open | A04 Reti Opening |
| 39. C Schmid vs H Giacomini |
| ½-½ | 29 | 2021 | Biel Master Open | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 40. F Blohberger vs H Giacomini |
| 1-0 | 55 | 2022 | European Championship | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 41. H Giacomini vs L Giannoulakis |
| 0-1 | 94 | 2022 | European Championship | A05 Reti Opening |
| 42. T Kenneskog vs H Giacomini |
| ½-½ | 55 | 2022 | European Championship | B10 Caro-Kann |
| 43. H Giacomini vs Y Milikow |
| ½-½ | 71 | 2022 | European Championship | A06 Reti Opening |
| 44. H Giacomini vs E Uruci |
| 0-1 | 52 | 2022 | European Championship | E61 King's Indian |
| 45. D Wagner vs H Giacomini |
| 1-0 | 90 | 2022 | European Championship | A13 English |
| 46. H Giacomini vs C Hilby |
| ½-½ | 36 | 2022 | Biel Master Open | D05 Queen's Pawn Game |
| 47. G Seul vs H Giacomini |
| 1-0 | 43 | 2022 | Biel Master Open | B12 Caro-Kann Defense |
| 48. J Santos Latasa vs H Giacomini |
| 1-0 | 23 | 2022 | El Llobregat Open | B12 Caro-Kann Defense |
| 49. N Gaprindashvili vs H Giacomini |
| 1-0 | 49 | 2023 | EU-ch Seniors 65 22nd | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 50. H Giacomini vs R Wessman |
| 0-1 | 39 | 2023 | Biel Master Open | D04 Queen's Pawn Game |
Kibitzing
