| 14 may 2026 | Henriquez Villagra, Cristobal 2605 | Diermair, Andreas 2336 | 1-0 | C20 Apertura de Peón de Rey: Leonardis Variation | Grand Prix PlusCity | Open Austrian Championship | Rapid | 45 | Ver |
| 18 abr 2026 | Diermair, Andreas 2448 | Perunovic, Milos 2499 | ½-½ | D02 Apertura de Peón de Dama: Symmetrical Variation | stveit | 41 | Ver |
| 17 abr 2026 | Bakalarz, Mietek 2184 | Diermair, Andreas 2448 | ½-½ | B13 Defensa Caro-Kann: Exchange Variation | stveit | 33 | Ver |
| 16 abr 2026 | Diermair, Andreas 2448 | Saric, Ante 2474 | ½-½ | E28 Defensa Nimzoindia: Sämisch Variation | stveit | 23 | Ver |
| 15 abr 2026 | Mazur, Stefan 2362 | Diermair, Andreas 2448 | ½-½ | C92 Apertura Española (Ruy López): Closed | stveit | 13 | Ver |
| 19 feb 2026 | Diermair, Andreas 2447 | Ammar, Sedrani 2239 | ½-½ | A07 Ataque Indio de Rey: Yugoslav Variation | International Chessopen Graz 2026 | 30 | Ver |
| 18 feb 2026 | Diermair, Andreas 2447 | Lymar, Vladislav 2287 | ½-½ | A06 Apertura Zukertort | International Chessopen Graz 2026 | 26 | Ver |
| 17 feb 2026 | Oktem, Ege Tuna 2356 | Diermair, Andreas 2447 | 1-0 | C50 Apertura Italiana: Giuoco Pianissimo, Normal | International Chessopen Graz 2026 | 87 | Ver |
| 17 feb 2026 | Diermair, Andreas 2447 | Leitgeb, Julian 2305 | 1-0 | E71 Defensa India de Rey: Karpov System | International Chessopen Graz 2026 | 38 | Ver |
| 16 feb 2026 | Silva, Pedro Gil Ferreira Da 2329 | Diermair, Andreas 2447 | ½-½ | C58 Apertura Italiana: Two Knights Defense, Polerio Defense, Bishop Check Line | International Chessopen Graz 2026 | 32 | Ver |
| 15 feb 2026 | Nurgaliyeva, Zarina 2286 | Diermair, Andreas 2447 | ½-½ | C84 Apertura Española (Ruy López): Closed, Martinez Variation | International Chessopen Graz 2026 | 41 | Ver |
| 14 feb 2026 | Diermair, Andreas 2447 | Dushatov, Timur 2167 | 1-0 | A05 Ataque Indio de Rey: Spassky Variation | International Chessopen Graz 2026 | 81 | Ver |
| 14 dic 2025 | Diermair, Andreas 2440 | Hirneise, Jens 2315 | ½-½ | E71 Defensa India de Rey: Makogonov Variation | Austrian Bundesliga 2025/26 | 71 | Ver |
| 13 dic 2025 | Meier, Alexander 2249 | Diermair, Andreas 2440 | ½-½ | C50 Apertura Italiana: Giuoco Pianissimo, Italian Four Knights Variation | Austrian Bundesliga 2025/26 | 45 | Ver |
| 19 oct 2025 | Trost, Edvin 2457 | Diermair, Andreas 2438 | ½-½ | C48 Apertura de los Cuatro Caballos: Spanish Variation | European Chess Club Cup 2025 | Open Matches 17+ | 36 | Ver |
| 20 sep 2025 | Stickler, Florentin 2124 | Diermair, Andreas 2431 | 0-1 | C92 Apertura Española (Ruy López): Closed, Flohr System | Wiener LM 2025 Masters | 60 | Ver |
| 19 sep 2025 | Diermair, Andreas 2431 | Stanec, Nikolaus 2454 | 1-0 | A05 Ataque Indio de Rey | Wiener LM 2025 Masters | 33 | Ver |
| 18 sep 2025 | Kundianok, Vladislav 2384 | Diermair, Andreas 2431 | ½-½ | E15 Defensa India de Dama: Fianchetto Variation | Wiener LM 2025 Masters | 27 | Ver |
| 17 sep 2025 | Diermair, Andreas 2431 | Balinov, Ilia 2376 | ½-½ | A16 Apertura Inglesa: Anglo-Indian Defense, Anglo-Grünfeld Variation | Wiener LM 2025 Masters | 18 | Ver |
| 16 sep 2025 | Shengelia, David 2480 | Diermair, Andreas 2431 | ½-½ | D79 Defensa Neogrünfeld: Ultra-Delayed Exchange Variation | Wiener LM 2025 Masters | 7 | Ver |