| 1 ago 2026 | Terlouw, Wouter 2323 | Matyassy, Lazar 2321 | 1-0 | D37 Queen's Gambit Declined: Barmen Variation | European Youth Team Chess Championship - Open18 | 58 | Ver |
| 26 jun 2026 | Ilko-Toth, Andras 2228 | Matyassy, Lazar 2282 | ½-½ | D02 Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | 5RigoJanos_Memorial_IM-B | 16 | Ver |
| 25 jun 2026 | Matyassy, Lazar 2282 | Gut, Lionel 2327 | 1-0 | B90 Sicilian Defense: Najdorf Variation, Adams Attack | 5RigoJanos_Memorial_IM-B | 30 | Ver |
| 24 jun 2026 | Sofronie, Vladimir 2175 | Matyassy, Lazar 2282 | 0-1 | A13 English Opening: Agincourt Defense, Wimpy System | 5RigoJanos_Memorial_IM-B | 53 | Ver |
| 24 jun 2026 | Matyassy, Lazar 2282 | Varga, Zoltan 2321 | ½-½ | B06 Modern Defense: Standard Line | 5RigoJanos_Memorial_IM-B | 11 | Ver |
| 23 jun 2026 | Sertic, Rudolf 2343 | Matyassy, Lazar 2282 | 0-1 | D37 Queen's Gambit Declined: Barmen Variation | 5RigoJanos_Memorial_IM-B | 41 | Ver |
| 22 jun 2026 | Matyassy, Lazar 2282 | Mavridis, Emmanouil 2061 | 1-0 | D00 Queen's Pawn Game: Accelerated London System | 5RigoJanos_Memorial_IM-B | 56 | Ver |
| 21 jun 2026 | Horvath, Andras 2151 | Matyassy, Lazar 2282 | ½-½ | B66 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | 5RigoJanos_Memorial_IM-B | 55 | Ver |
| 20 jun 2026 | Matyassy, Lazar 2282 | Kiryttopoulos, Ioannis 2123 | 1-0 | B45 Sicilian Defense: Four Knights Variation | 5RigoJanos_Memorial_IM-B | 28 | Ver |
| 19 may 2026 | Matyassy, Lazar 2282 | Pribelszky, Bence 2391 | ½-½ | B35 Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | 5RigoJanos_Memorial_IM-B | 46 | Ver |
| 10 may 2026 | Sundac, Ivano 2257 | Matyassy, Lazar 2299 | ½-½ | E11 Bogo-Indian Defense: Retreat Variation | mitropa-men | 34 | Ver |
| 9 may 2026 | Matyassy, Lazar 2299 | Ftacnik, Lubomir 2417 | 0-1 | B23 Sicilian Defense: Closed | mitropa-men | 22 | Ver |
| 8 may 2026 | Lumachi, Gabriele 2437 | Matyassy, Lazar 2299 | 1-0 | E16 Queen's Indian Defense: Capablanca Variation | mitropa-men | 40 | Ver |
| 7 may 2026 | Matyassy, Lazar 2299 | Gnojek, Petr 2400 | 1-0 | B45 Sicilian Defense: Four Knights Variation, Cobra Variation | mitropa-men | 49 | Ver |
| 6 may 2026 | Schuricht, Emil Frederick 2273 | Matyassy, Lazar 2299 | 0-1 | A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | mitropa-men | 46 | Ver |
| 5 may 2026 | Matyassy, Lazar 2299 | Mattenberger, Matthias 2332 | 0-1 | A45 Indian Defense: Accelerated London System | mitropa-men | 41 | Ver |
| 3 may 2026 | Bournel, Antoine 2431 | Matyassy, Lazar 2299 | 1-0 | A13 English Opening: Agincourt Defense, Catalan Defense Accepted | mitropa-men | 42 | Ver |
| 2 may 2026 | Matyassy, Lazar 2299 | Kozlovic, Jernej 2317 | 0-1 | C54 Italian Game: Classical Variation, Giuoco Pianissimo | mitropa-men | 57 | Ver |
| 4 abr 2026 | Matyassy, Lazar 2310 | Eljanov, Pavel 2682 | 0-1 | B44 Sicilian Defense: Taimanov Variation, Szén Variation | Grenke Chess Festival 2026 Open | 22 | Ver |
| 3 abr 2026 | Beerdsen, Thomas 2524 | Matyassy, Lazar 2310 | ½-½ | B67 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | Grenke Chess Festival 2026 Open | 53 | Ver |