| 29 nov 2019 | Zohaib Hassan, Mohamed 2282 | 1-0 | Lakunza Oyarbide, Juan Carlos 2058 | C00 French Defense: Steiner Variation | XVIII Gran T. Internacional Aficionados A Sub-2300 | 1 · mesa 3 |
| 14 oct 2017 | Lakunza Oyarbide, Juan Carlos 2057 | 0-1 | Arrondo Carbonell, Pablo 1742 | | Campeonato Absoluto de Gipuzkoa 2017 | 1 · mesa 7 |
| 16 sept 2016 | Rodriguez Gonzalez, Alex 1994 | ½-½ | Lakunza Oyarbide, Juan Carlos 2046 | C56 Italian Game: Two Knights Defense, Max Lange Attack | I Open Internacional de Getxo | 9 · mesa 9 |
| 14 sept 2016 | Prieto Aranguren, Alain 2168 | ½-½ | Lakunza Oyarbide, Juan Carlos 2046 | E97 King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line | I Open Internacional de Getxo | 6 · mesa 6 |
| 14 sept 2016 | Lakunza Oyarbide, Juan Carlos 2046 | 0-1 | Alvarez Pedraza, Aramis 2465 | A31 English Opening: Symmetrical Variation, Anti-Benoni Variation | I Open Internacional de Getxo | 7 · mesa 5 |
| 13 sept 2016 | Diaz Herrero, Alvaro 2217 | 0-1 | Lakunza Oyarbide, Juan Carlos 2046 | C45 Scotch Game: Mieses Variation | I Open Internacional de Getxo | 5 · mesa 7 |
| 11 sept 2016 | Martinez Duany, Lelys Stanley 2526 | 1-0 | Lakunza Oyarbide, Juan Carlos 2046 | E62 King's Indian Defense: Fianchetto Variation, Simagin Variation | I Open Internacional de Getxo | 3 · mesa 5 |
| 13 jun 2015 | Izquierdo Arruferia, Joseba 1857 | ½-½ | Lakunza Oyarbide, Juan Carlos 2092 | B24 Sicilian Defense: Closed | XI Open de Primavera de Gros | 8 · mesa 6 |
| 6 jun 2015 | Cantabrana Garona, Alejandro 1773 | 0-1 | Lakunza Oyarbide, Juan Carlos 2092 | E60 King's Indian Defense: Fianchetto Variation, Immediate Fianchetto | XI Open de Primavera de Gros | 7 · mesa 10 |
| 30 may 2015 | Lakunza Oyarbide, Juan Carlos 2092 | ½-½ | Burgana Lardizabal, Jose Angel 1798 | D02 Queen's Pawn Game: Zukertort Variation | XI Open de Primavera de Gros | 6 · mesa 10 |
| 23 may 2015 | Berdote Alonso, Carlos 1866 | 1-0 | Lakunza Oyarbide, Juan Carlos 2092 | E73 King's Indian Defense: Semi-Averbakh System | XI Open de Primavera de Gros | 5 · mesa 5 |
| 16 may 2015 | Lakunza Oyarbide, Juan Carlos 2092 | ½-½ | Zuloaga Erauskin, Markel 1625 | E05 Catalan Opening: Open Defense, Classical Line | XI Open de Primavera de Gros | 4 · mesa 2 |
| 9 may 2015 | Lakunza Oyarbide, Juan Carlos 2092 | 1-0 | Zubia Aramburu, Mikel 1757 | D48 Semi-Slav Defense: Meran Variation | XI Open de Primavera de Gros | 3 · mesa 7 |