| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 376. V Bernadskiy vs A Diermair |
| 1-0 | 44 | 2021 | 2nd GM Mix Bassano | B13 Caro-Kann, Exchange |
| 377. A Diermair vs J Yu |
| ½-½ | 53 | 2021 | 2nd GM Mix Bassano | D31 Queen's Gambit Declined |
| 378. J Martin Duque vs A Diermair |
| 0-1 | 27 | 2021 | 2nd GM Mix Bassano | C58 Two Knights |
| 379. J B Bjerre vs A Diermair |
| ½-½ | 13 | 2021 | 2nd GM Mix Bassano | A90 Dutch |
| 380. A Diermair vs Niemann |
| 0-1 | 60 | 2021 | 2nd GM Mix Bassano | A46 Queen's Pawn Game |
| 381. Z Tomazini vs A Diermair |
| 0-1 | 44 | 2021 | 2nd GM Mix Bassano | C50 Giuoco Piano |
| 382. P Schreiner vs A Diermair |
| ½-½ | 11 | 2021 | 2nd GM Mix Bassano | B18 Caro-Kann, Classical |
| 383. A Diermair vs F Baenziger |
| ½-½ | 27 | 2021 | 12th Dolomiti Open | A09 Reti Opening |
| 384. N Ravic vs A Diermair |
| 0-1 | 45 | 2021 | Serbia Chess Open | B12 Caro-Kann Defense |
| 385. A Diermair vs E Ozenir |
| 0-1 | 36 | 2021 | Serbia Chess Open | A15 English |
| 386. P Masic vs A Diermair |
| 0-1 | 27 | 2021 | Serbia Chess Open | B15 Caro-Kann |
| 387. A Diermair vs M Manakova |
| 1-0 | 47 | 2021 | Serbia Chess Open | E17 Queen's Indian |
| 388. A Puranik vs A Diermair |
| 0-1 | 33 | 2021 | Serbia Chess Open | C11 French |
| 389. A Diermair vs R Markus |
| ½-½ | 17 | 2021 | Serbia Chess Open | A46 Queen's Pawn Game |
| 390. A Diermair vs E Safarli |
| 0-1 | 41 | 2021 | Serbia Chess Open | D78 Neo-Grunfeld, 6.O-O c6 |
| 391. A Diermair vs Pichot |
| 0-1 | 56 | 2021 | Serbia Chess Open | A49 King's Indian, Fianchetto without c4 |
| 392. A Diermair vs F Blohberger |
| ½-½ | 49 | 2021 | Vienna GM | D11 Queen's Gambit Declined Slav |
| 393. S Zilka vs A Diermair |
| 1-0 | 29 | 2021 | Vienna GM | A70 Benoni, Classical with 7.Nf3 |
| 394. A Diermair vs G Dudin |
| 1-0 | 40 | 2021 | European Club Cup | D17 Queen's Gambit Declined Slav |
| 395. A Diermair vs O Sulypa |
| ½-½ | 52 | 2021 | European Club Cup | D31 Queen's Gambit Declined |
| 396. Y Korsunsky vs A Diermair |
| ½-½ | 42 | 2021 | European Club Cup | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 397. A Diermair vs E Sos Andreu |
| 1-0 | 52 | 2021 | European Club Cup | E51 Nimzo-Indian, 4.e3 |
| 398. P Makoli vs A Diermair |
| 0-1 | 53 | 2021 | European Club Cup | C95 Ruy Lopez, Closed, Breyer |
| 399. C Lovrinovic vs A Diermair |
| ½-½ | 57 | 2021 | Austrian Bundesliga 2021/22 | A84 Dutch |
| 400. A Diermair vs Buhmann |
| ½-½ | 39 | 2021 | Austrian Bundesliga 2021/22 | C45 Scotch Game |
Kibitzing
