| 1 ago 2026 | von Mettenheim, Johannes 2366 | Nemec, Jachym 2477 | 0-1 | A05 King's Indian Attack: Spassky Variation | European Youth Team Chess Championship - Open18 | 49 | Ver |
| 21 jul 2026 | Amar, Elham 2581 | Nemec, Jachym 2477 | 1-0 | C42 Petrov's Defense: Classical Attack, Staunton Variation | DOLE Open Aix-en-Provence 2026 | 58 | Ver |
| 12 may 2026 | Nemec, Jachym 2471 | Stocek, Jiri 2500 | 1-0 | A40 Kangaroo Defense: Keres Defense, Transpositional Variation | 2026 Czech Championship | Men | 50 | Ver |
| 12 may 2026 | Zilka, Stepan 2516 | Nemec, Jachym 2471 | ½-½ | E11 Bogo-Indian Defense: Vitolins Variation | 2026 Czech Championship | Men | 31 | Ver |
| 12 may 2026 | Nemec, Jachym 2471 | Hrbek, Stepan 2466 | ½-½ | E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense | 2026 Czech Championship | Men | 74 | Ver |
| 12 may 2026 | Kriebel, Tadeas 2524 | Nemec, Jachym 2471 | 0-1 | C42 Petrov's Defense: Karklins-Martinovsky Variation | 2026 Czech Championship | Men | 52 | Ver |
| 12 may 2026 | Nemec, Jachym 2471 | Navara, David 2624 | ½-½ | E28 Nimzo-Indian Defense: Sämisch Variation | 2026 Czech Championship | Men | 31 | Ver |
| 11 may 2026 | Finek, Vaclav 2573 | Nemec, Jachym 2471 | 1-0 | A57 Benko Gambit Accepted: Modern Variation | 2026 Czech Championship | Men | 34 | Ver |
| 10 may 2026 | Nemec, Jachym 2471 | Stalmach, Richard 2433 | 0-1 | E45 Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | 2026 Czech Championship | Men | 32 | Ver |
| 8 may 2026 | Krejci, Jan 2495 | Nemec, Jachym 2471 | 1-0 | A13 English Opening: Agincourt Defense | 2026 Czech Championship | Men | 28 | Ver |
| 6 may 2026 | Vykouk, Jan 2529 | Nemec, Jachym 2471 | 0-1 | C44 King's Pawn Game: Tayler Opening, Inverted Hanham | 2026 Czech Championship | Men | 53 | Ver |
| 19 abr 2026 | Nemec, Jachym 2482 | Zawadzka, Jolanta 2324 | ½-½ | A14 English Opening: Agincourt Defense, Neo-Catalan Declined | EICC 2026 | 65 | Ver |
| 18 abr 2026 | Medhus, Vitus Bondo 2401 | Nemec, Jachym 2482 | 1-0 | A13 English Opening: Agincourt Defense | EICC 2026 | 31 | Ver |
| 16 abr 2026 | Nemec, Jachym 2482 | Yeritsyan, Hayk 2342 | 1-0 | A06 Nimzo-Larsen Attack: Classical Variation | EICC 2026 | 39 | Ver |
| 15 abr 2026 | Durucay, Uygar 2286 | Nemec, Jachym 2482 | 0-1 | A43 Indian Defense: Pseudo-Benko | EICC 2026 | 76 | Ver |
| 14 abr 2026 | Nemec, Jachym 2482 | Morkunas, Gustas 2350 | 0-1 | D27 Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | EICC 2026 | 45 | Ver |
| 13 abr 2026 | Martirosyan, David 2281 | Nemec, Jachym 2482 | 0-1 | B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | EICC 2026 | 24 | Ver |
| 12 abr 2026 | Nemec, Jachym 2482 | Coicev, Matei-Andrei 2333 | 0-1 | A07 King's Indian Attack, with Bf5 | EICC 2026 | 54 | Ver |
| 10 abr 2026 | Santos Latasa, Jaime 2610 | Nemec, Jachym 2482 | 1-0 | A19 English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit | EICC 2026 | 25 | Ver |
| 9 abr 2026 | Nemec, Jachym 2482 | Rodshtein, Maxim 2598 | ½-½ | E45 Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | EICC 2026 | 33 | Ver |