Game |
| Result | Moves |
Year | Event/Locale | Opening |
51. L Bass vs R Henley |
| 0-1 | 53 | 1983 | New York Kavkasian | D99 Grunfeld Defense, Smyslov |
52. A Zapata vs L Bass |
| 1-0 | 57 | 1983 | New York Kavkasian | B83 Sicilian |
53. L Bass vs A Lein |
| ½-½ | 20 | 1983 | New York Kavkasian | D52 Queen's Gambit Declined |
54. Dlugy vs L Bass |
| ½-½ | 16 | 1983 | New York Kavkasian | D30 Queen's Gambit Declined |
55. L Bass vs Kudrin |
| ½-½ | 24 | 1983 | Hamar op | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
56. L Bass vs A C Chow |
 | 0-1 | 78 | 1983 | Master Challenge | D07 Queen's Gambit Declined, Chigorin Defense |
57. L Bass vs Benjamin |
 | 1-0 | 53 | 1983 | 11th World Open | A57 Benko Gambit |
58. L Bass vs D Kopec |
| 1-0 | 46 | 1983 | 11th World Open | E11 Bogo-Indian Defense |
59. T Ernst vs L Bass |
| ½-½ | 27 | 1983 | Eksjo | B81 Sicilian, Scheveningen, Keres Attack |
60. L Schneider vs L Bass |
| ½-½ | 56 | 1983 | Eksjo | A30 English, Symmetrical |
61. L Bass vs J Pribyl |
| ½-½ | 22 | 1983 | Eksjo | D99 Grunfeld Defense, Smyslov |
62. L Bass vs F Gustafsson |
| 1-0 | 22 | 1983 | Eksjo | D97 Grunfeld, Russian |
63. L Bass vs M Cocozza |
| 0-1 | 57 | 1983 | Eksjo | D99 Grunfeld Defense, Smyslov |
64. L Bass vs S Agdestein |
| ½-½ | 25 | 1983 | Eksjo | E11 Bogo-Indian Defense |
65. H Rothen vs L Bass |
| ½-½ | 34 | 1983 | Eksjo | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
66. K Regan vs L Bass |
| 0-1 | 62 | 1983 | Eksjo | B10 Caro-Kann |
67. L Bass vs M Wiedenkeller |
| 0-1 | 38 | 1983 | Eksjo | E28 Nimzo-Indian, Samisch Variation |
68. L Bass vs A A Smith |
| ½-½ | 45 | 1983 | Benedictine International | D97 Grunfeld, Russian |
69. L Bass vs C Laird |
| 1-0 | 35 | 1983 | Benedictine International | A53 Old Indian |
70. L Bass vs G Lane |
| 1-0 | 23 | 1983 | Benedictine International | A80 Dutch |
71. J Tarjan vs L Bass |
| 1-0 | 39 | 1983 | Benedictine International | B83 Sicilian |
72. L Bass vs I Bilek |
| ½-½ | 24 | 1983 | Benedictine International | E94 King's Indian, Orthodox |
73. G Lane vs L Bass |
| ½-½ | 42 | 1983 | Regency Masters | B12 Caro-Kann Defense |
74. L Bass vs Hodgson |
| ½-½ | 22 | 1983 | Regency Masters | A56 Benoni Defense |
75. G de Boer vs L Bass |
| 1-0 | 56 | 1983 | Regency Masters | E11 Bogo-Indian Defense |