| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Adianto vs N Mariano |
| 1-0 | 54 | 1995 | New York Open | E16 Queen's Indian |
| 27. D Gurevich vs N Mariano |
 | 0-1 | 58 | 1995 | National Open | E99 King's Indian, Orthodox, Taimanov |
| 28. R Bitoon vs N Mariano |
| 1-0 | 55 | 1996 | Greenhills Open | B53 Sicilian |
| 29. M Fuentes vs N Mariano |
| ½-½ | 18 | 1996 | Greenhills Open | E69 King's Indian, Fianchetto, Classical Main line |
| 30. N Mariano vs M Yasay |
| 1-0 | 17 | 1996 | Greenhills Open | B46 Sicilian, Taimanov Variation |
| 31. E Carag vs N Mariano |
| ½-½ | 50 | 1996 | Greenhills Open | B21 Sicilian, 2.f4 and 2.d4 |
| 32. N Mariano vs R Toledo |
| 0-1 | 30 | 1996 | Greenhills Open | C16 French, Winawer |
| 33. G Lnenickova vs N Mariano |
| 0-1 | 25 | 1997 | World Cities | C05 French, Tarrasch |
| 34. R Bitoon vs N Mariano |
| ½-½ | 58 | 2000 | Quezon City Equitable Card | A00 Uncommon Opening |
| 35. D Barua vs N Mariano |
| 1-0 | 35 | 2001 | 12th Goodricke Open | B54 Sicilian |
| 36. Z Rahman vs N Mariano |
| 1-0 | 60 | 2001 | 12th Goodricke Open | E97 King's Indian |
| 37. Ganguly vs N Mariano |
| 1-0 | 48 | 2001 | 12th Goodricke Open | B54 Sicilian |
| 38. A Mohd Omar vs N Mariano |
| 0-1 | 32 | 2001 | Asean op 1st | B54 Sicilian |
| 39. I Rogers vs N Mariano |
| 1-0 | 36 | 2001 | Asean op 1st | A45 Queen's Pawn Game |
| 40. N Mariano vs T Unsomsri |
| 1-0 | 39 | 2001 | Asean op 1st | C10 French |
| 41. V C Leong vs N Mariano |
| 0-1 | 27 | 2001 | Asean op 1st | B21 Sicilian, 2.f4 and 2.d4 |
| 42. N Mariano vs D Juswanto |
| ½-½ | 9 | 2001 | Asean op 1st | B20 Sicilian |
| 43. A Nguyen vs N Mariano |
| ½-½ | 21 | 2001 | Asean op 1st | E80 King's Indian, Samisch Variation |
| 44. N Mariano vs Aung Thant Zin |
| 0-1 | 31 | 2001 | Asean op 1st | A07 King's Indian Attack |
| 45. E Gellecania vs N Mariano |
| 0-1 | 30 | 2001 | Asean op 1st | E73 King's Indian |
| 46. W Teerapabpaisit vs N Mariano |
| 0-1 | 25 | 2001 | 1st Sea Chess TCh | B54 Sicilian |
| 47. N Mariano vs Thanh Son Nguyen |
| 0-1 | 68 | 2001 | 1st Sea Chess TCh | C47 Four Knights |
| 48. N Mariano vs Y Ranola |
| ½-½ | 15 | 2002 | PHI-ch | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 49. G Van der Stricht vs N Mariano |
| ½-½ | 46 | 2002 | Bled Olympiad | E97 King's Indian |
| 50. N Mariano vs P Thipsay |
| ½-½ | 81 | 2002 | Bled Olympiad | C84 Ruy Lopez, Closed |
Kibitzing
