| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. P Horn vs J Faure |
| ½-½ | 64 | 1987 | Geneva Open | A01 Nimzovich-Larsen Attack |
| 27. P Horn vs I Madl |
| 1-0 | 42 | 1988 | Geneva-B | B21 Sicilian, 2.f4 and 2.d4 |
| 28. R Kuczynski vs P Horn |
| 1-0 | 60 | 1988 | Geneva-B | B05 Alekhine's Defense, Modern |
| 29. G Lane vs P Horn |
| 0-1 | 35 | 1988 | Geneva-B | B02 Alekhine's Defense |
| 30. E Arlandi vs P Horn |
| 0-1 | 33 | 1988 | Geneva-B | A50 Queen's Pawn Game |
| 31. A Boog vs P Horn |
| ½-½ | 59 | 1988 | Geneva-B | B05 Alekhine's Defense, Modern |
| 32. J Faure vs P Horn |
| 0-1 | 28 | 1988 | Geneva-B | B02 Alekhine's Defense |
| 33. P Horn vs A Domont |
| 1-0 | 38 | 1988 | Geneva-B | B21 Sicilian, 2.f4 and 2.d4 |
| 34. P Horn vs J Koch |
| ½-½ | 42 | 1988 | Geneva-B | B21 Sicilian, 2.f4 and 2.d4 |
| 35. P Horn vs C Landenbergue |
| 0-1 | 58 | 1988 | Geneva-B | B02 Alekhine's Defense |
| 36. P Horn vs D Levacic |
| ½-½ | 41 | 1988 | Geneva-B | B21 Sicilian, 2.f4 and 2.d4 |
| 37. D Summermatter vs P Horn |
| 1-0 | 39 | 1988 | Geneva-B | A15 English |
| 38. P Horn vs E Paoli |
| 1-0 | 23 | 1989 | Reggio Emilia-B 8990 | B21 Sicilian, 2.f4 and 2.d4 |
| 39. P Horn vs W Eberlein |
| 1-0 | 80 | 1990 | Geneva Open | B10 Caro-Kann |
| 40. P Horn vs J Ambroz |
| 0-1 | 40 | 1990 | Biel-C | C00 French Defense |
| 41. P Horn vs V Arapovic |
| 0-1 | 33 | 1990 | Biel-C | B06 Robatsch |
| 42. M Ruf vs P Horn |
| 1-0 | 30 | 1990 | Geneva Open | A50 Queen's Pawn Game |
| 43. A Labarthe vs P Horn |
| ½-½ | 56 | 1990 | Geneva Open | A50 Queen's Pawn Game |
| 44. P Horn vs O Krivonosov |
| 0-1 | 31 | 1990 | Geneva Open | C58 Two Knights |
| 45. C Costello vs P Horn |
| 0-1 | 49 | 1990 | Geneva Open | A27 English, Three Knights System |
| 46. S Videki vs P Horn |
| 1-0 | 37 | 1990 | Biel MTO Open | A27 English, Three Knights System |
| 47. P Horn vs F Liardet |
| 1-0 | 52 | 1991 | Zug | B04 Alekhine's Defense, Modern |
| 48. M Ballmann vs P Horn |
| 1-0 | 52 | 1991 | Zug | A47 Queen's Indian |
| 49. N Giertz vs P Horn |
| 0-1 | 27 | 1991 | Zug | A80 Dutch |
| 50. P Horn vs N McDonald |
| 0-1 | 77 | 1991 | Zug | C11 French |
Kibitzing
