| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. L Day vs L Williams |
 | 1-0 | 58 |
1969 |
Tournoi de L'est | A36 English |
| 2. L Day vs L Williams |
| 1-0 | 33 |
1969 |
Eastern Canada Open | A01 Nimzovich-Larsen Attack |
| 3. L Day vs L Williams |
| 1-0 | 40 |
1971 |
Ontario Open | A07 King's Indian Attack |
| 4. L Williams vs K Spraggett |
| 1-0 | 35 |
1973 |
Ch. Invitation | B40 Sicilian |
| 5. L Williams vs Kaplan |
| 1-0 | 23 |
1974 |
World Open | B85 Sicilian, Scheveningen, Classical |
| 6. L Day vs L Williams |
| 1-0 | 38 |
1974 |
Labour Day Open | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 7. L Williams vs K Spraggett |
| ½-½ | 31 |
1975 |
Shawinigan | A81 Dutch |
| 8. L Williams vs Suttles |
| 1-0 | 37 |
1975 |
International Open | A04 Reti Opening |
| 9. K Spraggett vs L Williams |
| 1-0 | 42 |
1975 |
Can. Open, Calgary | B81 Sicilian, Scheveningen, Keres Attack |
| 10. L Williams vs L Day |
| 0-1 | 56 |
1975 |
Mr. Gameways (2) | A15 English |
| 11. J Labelle vs L Williams |
| ½-½ | 18 |
1978 |
Quebec Invitational | B93 Sicilian, Najdorf, 6.f4 |
| 12. L Day vs L Williams |
| 1-0 | 30 |
1979 |
Quebec op | B02 Alekhine's Defense |
| 13. L Williams vs Robert Finta |
| 1-0 | 30 |
1979 |
Montreal Closed Championship | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 14. L Williams vs K Spraggett |
| 0-1 | 67 |
1979 |
Ete Rive-Sud | B42 Sicilian, Kan |
| 15. Igor Ivanov vs L Williams |
| ½-½ | 50 |
1981 |
Ch. Invitation | B26 Sicilian, Closed, 6.Be3 |
| 16. K Spraggett vs L Williams |
| 1-0 | 33 |
1981 |
Ch. Invitation | A18 English, Mikenas-Carls |
| 17. K Spraggett vs L Williams |
| 1-0 | 31 |
1982 |
Ch. Invitation | B62 Sicilian, Richter-Rauzer |
| 18. L Williams vs K Spraggett |
| 0-1 | 26 |
1986 |
Quebec International | B81 Sicilian, Scheveningen, Keres Attack |
| 19. L Williams vs Hudson |
| 1-0 | 29 |
1986 |
blindfold simul | B07 Pirc |
| 20. L Williams vs K Spraggett |
| 0-1 | 48 |
1986 |
Ch. Invitation | B60 Sicilian, Richter-Rauzer |
| 21. Igor Ivanov vs L Williams |
 | 1-0 | 27 |
1986 |
Quebec International | D83 Grunfeld, Grunfeld Gambit |