| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Franzoni vs L Ortega |
| 0-1 | 46 | 1978 | World Junior Championship | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 2. L Ortega vs Petursson |
| 0-1 | 33 | 1978 | World Junior Championship | A14 English |
| 3. G Morrison vs L Ortega |
| 1-0 | 32 | 1978 | World Junior Championship | A71 Benoni, Classical, 8.Bg5 |
| 4. L Ortega vs A Khakpoor |
| 1-0 | 33 | 1978 | World Junior Championship | A16 English |
| 5. L Ortega vs Baptista |
| 1-0 | 40 | 1978 | World Junior Championship | A39 English, Symmetrical, Main line with d4 |
| 6. M Pasman vs L Ortega |
| 1-0 | 34 | 1978 | World Junior Championship | A45 Queen's Pawn Game |
| 7. K Mokry vs L Ortega |
| ½-½ | 48 | 1978 | World Junior Championship | B96 Sicilian, Najdorf |
| 8. D Taruffi vs L Ortega |
| 0-1 | 39 | 1978 | World Junior Championship | A36 English |
| 9. A Duer vs L Ortega |
| 0-1 | 65 | 1978 | World Junior Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 10. C M Bjork vs L Ortega |
| 1-0 | 76 | 1978 | World Junior Championship | B93 Sicilian, Najdorf, 6.f4 |
| 11. L Ortega vs C Karadag |
| 0-1 | 40 | 1978 | World Junior Championship | A09 Reti Opening |
| 12. L Ortega vs T Karolyi |
| ½-½ | 29 | 1978 | World Junior Championship | D41 Queen's Gambit Declined, Semi-Tarrasch |
| 13. J Diaz vs L Ortega |
| 1-0 | 27 | 1980 | Cienfuegos | B93 Sicilian, Najdorf, 6.f4 |
| 14. L Ortega vs Y E Liao |
| ½-½ | 53 | 1980 | World Youth U26 Team Championship Final-A | A16 English |
| 15. J Ye vs L Ortega |
| 1-0 | 35 | 1980 | World Youth U26 Team Championship Final-A | B93 Sicilian, Najdorf, 6.f4 |
| 16. L Ortega vs E Kengis |
| 0-1 | 26 | 1980 | World Youth U26 Team Championship Final-A | A13 English |
| 17. A Rodriguez vs L Ortega |
| 1-0 | 45 | 1982 | CUB-ch | A61 Benoni |
| 18. L Ortega vs L Dobrovolsky |
| 0-1 | 27 | 1982 | Tatran Cup | A25 English |
| 19. L Ortega vs E Meduna |
| 0-1 | 31 | 1982 | Tatran Cup | D12 Queen's Gambit Declined Slav |
| 20. L Ortega vs E Prandstetter |
| ½-½ | 25 | 1982 | Tatran Cup | A22 English |
| 21. R Vera vs L Ortega |
 | 0-1 | 38 | 1982 | CUB-ch | A28 English |
| 22. L Ortega vs Plachetka |
 | 0-1 | 38 | 1982 | Tatran Cup | A34 English, Symmetrical |
| 23. J Franzen vs L Ortega |
| ½-½ | 30 | 1982 | Tatran Cup | A04 Reti Opening |
| 24. A Rodriguez vs L Ortega |
| 1-0 | 36 | 1982 | Bayamo | A71 Benoni, Classical, 8.Bg5 |
| 25. M Knezevic vs L Ortega |
| ½-½ | 34 | 1982 | Tatran Cup | E32 Nimzo-Indian, Classical |
Kibitzing
