| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. P Ostojic vs Biyiasas |
| 1-0 | 71 |
1973 |
01. Sao Paulo it | C88 Ruy Lopez |
| 2. Bronstein vs Biyiasas |
| ½-½ | 43 |
1973 |
Izt | C77 Ruy Lopez |
| 3. L Day vs Biyiasas |
| 1-0 | 92 |
1974 |
Quebec Open | C95 Ruy Lopez, Closed, Breyer |
| 4. Balashov vs Biyiasas |
 | 1-0 | 27 |
1976 |
Izt | C75 Ruy Lopez, Modern Steinitz Defense |
| 5. L A Tan vs Biyiasas |
| ½-½ | 86 |
1976 |
Manila izt | C60 Ruy Lopez |
| 6. S Tatai vs Biyiasas |
| 0-1 | 26 |
1976 |
22. Olimpiada | C60 Ruy Lopez |
| 7. R Ervin vs Biyiasas |
| 1-0 | 41 |
1976 |
Lone Pine | C75 Ruy Lopez, Modern Steinitz Defense |
| 8. Tseshkovsky vs Biyiasas |
| 1-0 | 67 |
1976 |
Manila Interzonal | C75 Ruy Lopez, Modern Steinitz Defense |
| 9. R Gruchacz vs Biyiasas |
| 1-0 | 45 |
1976 |
Lone Pine | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 10. Balashov vs Biyiasas |
| 1-0 | 48 |
1977 |
Lone Pine op | C87 Ruy Lopez |
| 11. A Lein vs Biyiasas |
| 0-1 | 40 |
1977 |
New York | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 12. Tarjan vs Biyiasas |
| 0-1 | 48 |
1977 |
Lone Pine (USA) | C87 Ruy Lopez |
| 13. K Spraggett vs Biyiasas |
| ½-½ | 39 |
1978 |
Ch. Canada, Toronto | C98 Ruy Lopez, Closed, Chigorin |
| 14. Short vs Biyiasas |
| 1-0 | 38 |
1979 |
Hastings | C71 Ruy Lopez |
| 15. Van der Sterren vs Biyiasas |
| 1-0 | 37 |
1979 |
Lone Pine op | C75 Ruy Lopez, Modern Steinitz Defense |
| 16. Tringov vs Biyiasas |
| 1-0 | 46 |
1980 |
Bar | C75 Ruy Lopez, Modern Steinitz Defense |
| 17. R Byrne vs Biyiasas |
| ½-½ | 27 |
1980 |
Wijk aan Zee I | C92 Ruy Lopez, Closed |
| 18. Bisguier vs Biyiasas |
| ½-½ | 29 |
1980 |
Lone Pine (USA) | C77 Ruy Lopez |
| 19. V Frias vs Biyiasas |
| 0-1 | 47 |
1981 |
Lone Pine | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 20. I D Wells vs Biyiasas |
| 0-1 | 51 |
1981 |
Lone Pine | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
