| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. A Murillo vs P Popovic |
 | 0-1 | 18 | 1988 | Thessaloniki Olympiad | B57 Sicilian |
| 2. F Braga vs A Murillo |
| 1-0 | 59 | 1988 | Thessaloniki Olympiad | C13 French |
| 3. A Murillo vs S J Hutchings |
| 0-1 | 53 | 1990 | Novi Sad Olympiad | B08 Pirc, Classical |
| 4. F Maynard vs A Murillo |
| 1-0 | 68 | 1991 | Gutierrez mem | D53 Queen's Gambit Declined |
| 5. A Murillo vs F Maynard |
| 1-0 | 41 | 1994 | CRA-ch | A13 English |
| 6. F Maynard vs A Murillo |
| 0-1 | 72 | 1998 | CRA-chT | C01 French, Exchange |
| 7. A Murillo vs G Hernandez Guerrero |
| 1-0 | 41 | 1998 | San Salvador zt | B44 Sicilian |
| 8. A Murillo vs F Maynard |
| 1-0 | 41 | 2000 | CRA-ch | B45 Sicilian, Taimanov |
| 9. A Murillo vs S Minero Pineda |
| ½-½ | 18 | 2001 | Costa Rican Championship | C07 French, Tarrasch |
| 10. W Charpentier Morales vs A Murillo |
| 0-1 | 36 | 2001 | Costa Rican Championship | D31 Queen's Gambit Declined |
| 11. B Gonzalez vs A Murillo |
| ½-½ | 15 | 2001 | Costa Rican Championship | A03 Bird's Opening |
| 12. A Murillo vs L Valdes |
| ½-½ | 44 | 2001 | Costa Rican Championship | A04 Reti Opening |
| 13. J Vaglio Munoz vs A Murillo |
| ½-½ | 56 | 2001 | Costa Rican Championship | A04 Reti Opening |
| 14. A Murillo vs F Hernandez Basante |
| 1-0 | 44 | 2001 | Costa Rican Championship | B50 Sicilian |
| 15. M Arias Santana vs A Murillo |
| 0-1 | 38 | 2001 | Costa Rican Championship | C17 French, Winawer, Advance |
| 16. A Murillo vs J C Sanchez Jimenez |
| ½-½ | 82 | 2001 | Costa Rican Championship | A01 Nimzovich-Larsen Attack |
| 17. E Solis vs A Murillo |
| 0-1 | 49 | 2001 | Costa Rican Championship | D02 Queen's Pawn Game |
| 18. A Murillo vs D Rodriguez Chaverri |
| 1-0 | 36 | 2001 | Costa Rican Championship | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 19. S Bermudez Vives vs A Murillo |
| 1-0 | 60 | 2001 | Costa Rican Championship | D35 Queen's Gambit Declined |
| 20. A Murillo vs R Ugalde Garcia |
| 1-0 | 24 | 2001 | Costa Rican Championship | B89 Sicilian |
| 21. C Granados vs A Murillo |
| 0-1 | 48 | 2001 | Costa Rican Championship | A40 Queen's Pawn Game |
| 22. A Murillo vs R Iraheta |
| 1-0 | 15 | 2003 | San Salvador Open | B72 Sicilian, Dragon |
| 23. A Murillo vs P Kiriakov |
| 0-1 | 26 | 2003 | San Salvador Open | C03 French, Tarrasch |
| 24. L Lievano Alvarado vs A Murillo |
| 1-0 | 23 | 2003 | San Salvador Open | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 25. S Zepeda vs A Murillo |
| 0-1 | 29 | 2003 | San Salvador Open | C01 French, Exchange |
Kibitzing
