| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. L Slagboom vs M van Foreest |
| ½-½ | 23 | 2023 | Groningen Open | B12 Caro-Kann Defense |
| 27. K Lambrechts vs L Slagboom |
| ½-½ | 19 | 2023 | Groningen Open | C22 Center Game |
| 28. L Slagboom vs T Stremavicius |
| ½-½ | 10 | 2023 | Groningen Open | B45 Sicilian, Taimanov |
| 29. J Breukelman vs L Slagboom |
| ½-½ | 27 | 2024 | Dutch League 2023/24 | D33 Queen's Gambit Declined, Tarrasch |
| 30. M Bosman vs L Slagboom |
| ½-½ | 35 | 2024 | Dutch League 2023/24 | E00 Queen's Pawn Game |
| 31. T Lammens vs L Slagboom |
| 1-0 | 30 | 2024 | Dutch League 2023/24 | A13 English |
| 32. L Suvorov vs L Slagboom |
| ½-½ | 45 | 2024 | Dutch League 2023/24 | D32 Queen's Gambit Declined, Tarrasch |
| 33. L Slagboom vs C Schoppen |
| 1-0 | 28 | 2024 | ch-NED KO | B40 Sicilian |
| 34. C Schoppen vs L Slagboom |
| ½-½ | 49 | 2024 | ch-NED KO | C11 French |
| 35. L Slagboom vs M Warmerdam |
| ½-½ | 40 | 2024 | ch-NED KO | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 36. M Warmerdam vs L Slagboom |
| 1-0 | 27 | 2024 | ch-NED KO | A07 King's Indian Attack |
| 37. A Sinitsyn vs L Slagboom |
| 0-1 | 42 | 2024 | European Youth Championship U18 | D35 Queen's Gambit Declined |
| 38. L Slagboom vs V Vilimek |
| 1-0 | 25 | 2024 | European Youth Championship U18 | A16 English |
| 39. R Stalmach vs L Slagboom |
| 1-0 | 66 | 2024 | European Youth Championship U18 | A61 Benoni |
| 40. L Slagboom vs H Backiel |
| ½-½ | 28 | 2024 | European Youth Championship U18 | A13 English |
| 41. S A Kasipour Azbari vs L Slagboom |
| 0-1 | 28 | 2024 | European Youth Championship U18 | C02 French, Advance |
| 42. L Slagboom vs S Valiyev |
| 1-0 | 81 | 2024 | European Youth Championship U18 | B23 Sicilian, Closed |
| 43. Y Sokolovsky vs L Slagboom |
| 1-0 | 48 | 2024 | European Youth Championship U18 | C13 French |
| 44. L Slagboom vs D Hak |
| ½-½ | 48 | 2024 | European Youth Championship U18 | B32 Sicilian |
| 45. J D Bermudez Ureba vs L Slagboom |
| 0-1 | 38 | 2024 | European Youth Championship U18 | C78 Ruy Lopez |
| 46. L Slagboom vs I Kukushkin |
| 1-0 | 59 | 2024 | Hoogeveen Open | A14 English |
| 47. J Boeren vs L Slagboom |
| 0-1 | 19 | 2024 | Hoogeveen Open | C70 Ruy Lopez |
| 48. L Slagboom vs S Gupta |
| 0-1 | 37 | 2024 | Hoogeveen Open | C55 Two Knights Defense |
| 49. A Bakija vs L Slagboom |
| 0-1 | 104 | 2024 | Hoogeveen Open | E60 King's Indian Defense |
| 50. L Slagboom vs B ten Dam |
| 1-0 | 38 | 2024 | Hoogeveen Open | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
Kibitzing
