| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. G Castaneda vs M Ulybin |
| 0-1 | 28 | 1998 | RUS-Cup | A90 Dutch |
| 27. G Castaneda vs A Volokitin |
| 1-0 | 30 | 1998 | Swidnica op rap | D05 Queen's Pawn Game |
| 28. G Castaneda vs I A Zaitsev |
| ½-½ | 61 | 1998 | Moscow-ch op | A46 Queen's Pawn Game |
| 29. G Castaneda vs E Prokopchuk |
| 1-0 | 40 | 1998 | RUS-Cup | A46 Queen's Pawn Game |
| 30. G Castaneda vs Jobava |
 | 1-0 | 34 | 1998 | Petrov mem | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 31. G Castaneda vs A Galkin |
| ½-½ | 30 | 1998 | Petrov mem | D43 Queen's Gambit Declined Semi-Slav |
| 32. G Castaneda vs E Vorobiov |
| ½-½ | 21 | 1998 | Petrov mem | C02 French, Advance |
| 33. Taimanov vs G Castaneda |
| 1-0 | 50 | 1998 | Petrov mem | A13 English |
| 34. G Castaneda vs S Zagrebelny |
| 0-1 | 28 | 1998 | Petrov mem | A04 Reti Opening |
| 35. P Garcia Toledo vs G Castaneda |
| ½-½ | 12 | 1999 | PER-ch | A41 Queen's Pawn Game (with ...d6) |
| 36. J Adamski vs G Castaneda |
| ½-½ | 16 | 1999 | POL-ch U26 | E94 King's Indian, Orthodox |
| 37. G Castaneda vs C Sawczuk |
| ½-½ | 58 | 1999 | Swidnica Open | A13 English |
| 38. M Nurkiewicz vs G Castaneda |
| 1-0 | 36 | 1999 | Swidnica Open | B09 Pirc, Austrian Attack |
| 39. G Castaneda vs E Cordova |
| 1-0 | 29 | 2000 | Oz.com qualifier blitz | B77 Sicilian, Dragon, Yugoslav Attack |
| 40. J Soto Vega vs G Castaneda |
| ½-½ | 16 | 2000 | Peruvian Championship | C00 French Defense |
| 41. G Castaneda vs C Robbiano Taboada |
| ½-½ | 56 | 2000 | Peruvian Championship | A41 Queen's Pawn Game (with ...d6) |
| 42. J Mansilla vs G Castaneda |
| 0-1 | 33 | 2000 | Peruvian Championship | A21 English |
| 43. G Castaneda vs I Hernandez |
| 1-0 | 49 | 2000 | Peruvian Championship | D23 Queen's Gambit Accepted |
| 44. J Garcia vs G Castaneda |
| 0-1 | 32 | 2000 | Peruvian Championship | A90 Dutch |
| 45. G Castaneda vs V Mejia Rodriguez |
| ½-½ | 39 | 2000 | Peruvian Championship | D21 Queen's Gambit Accepted |
| 46. R Alarcon vs G Castaneda |
| 1-0 | 32 | 2000 | Peruvian Championship | C05 French, Tarrasch |
| 47. G Castaneda vs M Belli Pino |
| ½-½ | 19 | 2000 | Peruvian Championship | D23 Queen's Gambit Accepted |
| 48. F Cruz vs G Castaneda |
| ½-½ | 10 | 2000 | Peruvian Championship | E15 Queen's Indian |
| 49. C Esplana vs G Castaneda |
| 1-0 | 33 | 2000 | Peruvian Championship | C11 French |
| 50. G Castaneda vs E Ramos |
| ½-½ | 25 | 2000 | Peruvian Championship | A00 Uncommon Opening |
Kibitzing
