| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. E Vladimirov vs L Bass |
| 1-0 | 28 |
1974 |
URS-ch U18 | B17 Caro-Kann, Steinitz Variation |
| 2. L Day vs L Bass |
| 1-0 | 57 |
1980 |
World Open | B10 Caro-Kann |
| 3. L Day vs L Bass |
| ½-½ | 8 |
1980 |
Marshall Bar Point int. | B10 Caro-Kann |
| 4. L Bass vs E Vladimirov |
| ½-½ | 18 |
1981 |
WchT U26 | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 5. L Bass vs K Burger |
| ½-½ | 33 |
1983 |
New York | D99 Grunfeld Defense, Smyslov |
| 6. L Karlsson vs L Bass |
| 1-0 | 12 |
1983 |
Norway | A34 English, Symmetrical |
| 7. Hebden vs L Bass |
| ½-½ | 42 |
1983 |
New York (USA) | B14 Caro-Kann, Panov-Botvinnik Attack |
| 8. L Bass vs J Benjamin |
| 1-0 | 53 |
1983 |
World op New York | A57 Benko Gambit |
| 9. V Zaltsman vs L Bass |
| ½-½ | 41 |
1983 |
New York | E11 Bogo-Indian Defense |
| 10. H Rothen vs L Bass |
| ½-½ | 34 |
1983 |
Eksjo 11th | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 11. L Bass vs K Spraggett |
 | 1-0 | 41 |
1983 |
NY Kavkasian | E99 King's Indian, Orthodox, Taimanov |
| 12. L Bass vs J Benjamin |
| 1-0 | 33 |
1985 |
07, New York op | A65 Benoni, 6.e4 |
| 13. E Vladimirov vs L Bass |
| ½-½ | 45 |
1989 |
Marchena | D37 Queen's Gambit Declined |
| 14. Granda-Zuniga vs L Bass |
| ½-½ | 33 |
1990 |
Barcelona 21 | D02 Queen's Pawn Game |
| 15. L Bass vs Illescas Cordoba |
| ½-½ | 11 |
1990 |
Barcelona | D30 Queen's Gambit Declined |
| 16. L Bass vs Granda-Zuniga |
| 0-1 | 38 |
1990 |
Leon 20 | D35 Queen's Gambit Declined |
| 17. W Arencibia vs L Bass |
| ½-½ | 44 |
1991 |
Leon | B12 Caro-Kann Defense |
| 18. L Bass vs E Vladimirov |
| ½-½ | 19 |
1991 |
Leon | D55 Queen's Gambit Declined |
| 19. Granda-Zuniga vs L Bass |
| 1-0 | 28 |
1991 |
ESP | E81 King's Indian, Samisch |