| Apr 19, 2026 | Large | 1–0 | Kainz | Round 1: Large, Peter G - Kainz, Josef | Sicilian Defense: Accelerated Dragon, Modern Variation | |
| Nov 1, 2025 | De Giorgi | ½–½ | Kainz | Round 11: De Giorgi, Stefano - Kainz, Josef | Sicilian Defense: Moscow Variation | |
| Oct 31, 2025 | Kainz | 1–0 | Kaldis | Round 10: Kainz, Josef - Kaldis, Georgios | Dutch Defense: Stonewall Variation, Modern Variation | |
| Oct 30, 2025 | Kocak | 1–0 | Kainz | Round 9: Kocak, Mustafa Sabri - Kainz, Josef | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Oct 29, 2025 | Kainz | 1–0 | Hileyan | Round 8: Kainz, Josef - Hileyan, Michel | Dutch Defense: Leningrad Variation, Warsaw Variation | |
| Oct 28, 2025 | Magnussen | ½–½ | Kainz | Round 7: Magnussen, Pal - Kainz, Josef | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Oct 26, 2025 | Kainz | ½–½ | Staechelin | Round 6: Kainz, Josef - Staechelin, Ruedi | Slav Defense: Chebanenko Variation | |
| Oct 25, 2025 | Braathen | 1–0 | Kainz | Round 5: Braathen, Tom - Kainz, Josef | Sicilian Defense: Wing Gambit, Marshall Variation | |
| Oct 22, 2025 | Kainz | 0–1 | Henss | Round 2: Kainz, Josef - Henss, Olaf, Dr. | Queen's Pawn Game | |
| Oct 21, 2025 | Gal | 1–0 | Kainz | Round 1: Gal, Moshe - Kainz, Josef | Neo-Grünfeld Defense: Classical Variation, Modern Defense | |
| Jun 19, 2024 | Kainz | 0–1 | Schachinger | 36th International Chess Tournament Open Pula 2024 | Queen's Indian Defense: Capablanca Variation | |
| Jun 6, 2021 | Kainz | 1–0 | Gattermayer Robert | Austrian Blitz Championship | ? | |
| Jun 6, 2021 | Kainz | 0–1 | Stepan | Austrian Blitz Championship | ? | |
| Jun 6, 2021 | Miazhynski | 1–0 | Kainz | Austrian Blitz Championship | ? | |
| Jun 6, 2021 | Kienboeck | * | Kainz | Austrian Blitz Championship | ? | |
| Jun 5, 2021 | Kainz | 0–1 | Nolz | Austrian Rapid Championship | ? | |
| Jun 5, 2021 | Kainz | 1–0 | Ploeckinger | Austrian Rapid Championship | ? | |
| Jun 5, 2021 | Stepan | * | Kainz | Austrian Rapid Championship | ? | |
| Jun 5, 2021 | Neumeier | 1–0 | Kainz | Austrian Rapid Championship | ? | |
| Jun 4, 2021 | Huber | 1–0 | Kainz | Austrian Rapid Championship | King's Indian Attack: Symmetrical Defense | |
