| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. A Bomans vs N Ondersteijn |
| 1-0 | 36 | 2022 | 14th BPB Limburg Open | A45 Queen's Pawn Game |
| 52. N Ondersteijn vs K Pham |
| ½-½ | 46 | 2022 | 14th BPB Limburg Open | A01 Nimzovich-Larsen Attack |
| 53. H Kucharska vs N Ondersteijn |
| 0-1 | 64 | 2022 | 14th BPB Limburg Open | E62 King's Indian, Fianchetto |
| 54. N Ondersteijn vs A Nemegeer |
| 1-0 | 34 | 2022 | 14th BPB Limburg Open | B10 Caro-Kann |
| 55. C Pauly vs N Ondersteijn |
| 0-1 | 46 | 2022 | 14th BPB Limburg Open | E94 King's Indian, Orthodox |
| 56. S Maze vs N Ondersteijn |
| 1-0 | 59 | 2022 | 37th European Chess Club Cup | B07 Pirc |
| 57. N Ondersteijn vs E Postny |
| 0-1 | 57 | 2022 | 37th European Chess Club Cup | E15 Queen's Indian |
| 58. P Prohaszka vs N Ondersteijn |
| 1-0 | 34 | 2022 | 37th European Chess Club Cup | A46 Queen's Pawn Game |
| 59. R Konijn vs N Ondersteijn |
| 1-0 | 60 | 2023 | Dutch League 2023/24 | B09 Pirc, Austrian Attack |
| 60. J Santos Latasa vs N Ondersteijn |
| 1-0 | 70 | 2023 | European Club Cup | B27 Sicilian |
| 61. R Samadov vs N Ondersteijn |
| ½-½ | 69 | 2023 | European Club Cup | E04 Catalan, Open, 5.Nf3 |
| 62. J de Jong vs N Ondersteijn |
| ½-½ | 85 | 2023 | European Club Cup | E62 King's Indian, Fianchetto |
| 63. N Ondersteijn vs M van der Werf |
| 0-1 | 36 | 2023 | Dutch League 2023/24 | A70 Benoni, Classical with 7.Nf3 |
| 64. N Ondersteijn vs I Wantola |
| 0-1 | 28 | 2023 | Dutch League 2023/24 | A52 Budapest Gambit |
| 65. M Praet vs N Ondersteijn |
| 0-1 | 23 | 2023 | Dutch League 2023/24 | B08 Pirc, Classical |
| 66. L van der Hagen vs N Ondersteijn |
| 1-0 | 39 | 2024 | Dutch League 2023/24 | B07 Pirc |
| 67. S van Gisbergen vs N Ondersteijn |
| 0-1 | 27 | 2024 | Dutch League 2023/24 | E80 King's Indian, Samisch Variation |
| 68. N Ondersteijn vs G Van der Stricht |
| 1-0 | 48 | 2024 | Dutch League 2023/24 | A14 English |
| 69. N Ondersteijn vs S Aswath |
| 0-1 | 37 | 2025 | Grenke Chess Open | A13 English |
| 70. N Ondersteijn vs D Ceres |
| 1-0 | 65 | 2025 | Grenke Chess Open | A20 English |
| 71. E Rozen vs N Ondersteijn |
| 1-0 | 33 | 2025 | Grenke Chess Open | D35 Queen's Gambit Declined |
| 72. N Ondersteijn vs B Maksimovic |
| 0-1 | 46 | 2025 | Grenke Chess Open | E67 King's Indian, Fianchetto |
Kibitzing
