| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. M Heidenfeld vs Mephisto |
| ½-½ | 32 | 1990 | Kirchheim rapid | C54 Giuoco Piano |
| 52. M Heidenfeld vs H Dutschak |
| 1-0 | 49 | 1990 | BL2-S 9091 | B01 Scandinavian |
| 53. M Heidenfeld vs P Schmidt |
| ½-½ | 26 | 1990 | BL2-S 9091 | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 54. M Heidenfeld vs A Zlochevskij |
| ½-½ | 18 | 1990 | Nuremberg op | C13 French |
| 55. Robert Trapp vs M Heidenfeld |
| 0-1 | 22 | 1990 | Nuremberg op | A02 Bird's Opening |
| 56. Jirele vs M Heidenfeld |
| 0-1 | 21 | 1990 | Nuremberg op | A27 English, Three Knights System |
| 57. M Heidenfeld vs Gipslis |
| 0-1 | 39 | 1990 | Groningen Open | B07 Pirc |
| 58. M Heidenfeld vs M Peek |
| ½-½ | 25 | 1990 | Groningen Open | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 59. V M Vehi Bach vs M Heidenfeld |
| 1-0 | 61 | 1990 | Groningen Open | C11 French |
| 60. D Migl vs M Heidenfeld |
| 1-0 | 30 | 1991 | BL2-S 9091 | C91 Ruy Lopez, Closed |
| 61. M Baldauf vs M Heidenfeld |
| ½-½ | 37 | 1991 | BL2-S 9091 | A04 Reti Opening |
| 62. R Weigel vs M Heidenfeld |
| 0-1 | 26 | 1991 | BL2-S 9091 | A25 English |
| 63. M Heidenfeld vs G Schmid |
| ½-½ | 41 | 1991 | BL2-S 9091 | B92 Sicilian, Najdorf, Opocensky Variation |
| 64. M Heidenfeld vs V Hillermann |
| ½-½ | 24 | 1991 | Wuerttemberg-ch | C18 French, Winawer |
| 65. A Vuckovic vs M Heidenfeld |
| ½-½ | 26 | 1991 | Wuerttemberg-ch | C45 Scotch Game |
| 66. E Bauer vs M Heidenfeld |
 | 1-0 | 44 | 1991 | WURT-ch Zell | C29 Vienna Gambit |
| 67. M Lochner vs M Heidenfeld |
| 0-1 | 60 | 1991 | BL2-S 9091 | A41 Queen's Pawn Game (with ...d6) |
| 68. M Heidenfeld vs W Melcher |
| ½-½ | 8 | 1991 | Wuerttemberg-ch | B41 Sicilian, Kan |
| 69. M Hoensch vs M Heidenfeld |
| 1-0 | 42 | 1991 | Wuerttemberg-ch | A12 English with b3 |
| 70. T Gruber vs M Heidenfeld |
| ½-½ | 10 | 1991 | Wuerttemberg-ch | A12 English with b3 |
| 71. M Heidenfeld vs T Dolgener |
| ½-½ | 14 | 1991 | Wuerttemberg-ch | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 72. M Heidenfeld vs M Krockenberger |
| ½-½ | 15 | 1991 | Wuerttemberg-ch | B43 Sicilian, Kan, 5.Nc3 |
| 73. M Heidenfeld vs J E Roth |
| 1-0 | 46 | 1991 | Wuerttemberg-ch | B06 Robatsch |
| 74. M Heidenfeld vs F Noonan |
| 1-0 | 46 | 1991 | Irish Championship | B02 Alekhine's Defense |
| 75. G O'Connell vs M Heidenfeld |
| ½-½ | 33 | 1991 | Irish Championship | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
Kibitzing
