| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Biyiasas vs Kavalek |
| 0-1 | 44 |
1971 |
9th Canadian Open | B77 Sicilian, Dragon, Yugoslav Attack |
| 2. Biyiasas vs E Paoli |
| ½-½ | 45 |
1972 |
20. Olimpiada | B30 Sicilian |
| 3. Biyiasas vs L Day |
| ½-½ | 20 |
1972 |
16, Toronto CAN ch | B50 Sicilian |
| 4. Biyiasas vs H Suradiradja |
| 1-0 | 17 |
1972 |
Skopje ol | B31 Sicilian, Rossolimo Variation |
| 5. Biyiasas vs Hug |
 | 1-0 | 22 |
1973 |
Petropolis izt | B40 Sicilian |
| 6. Biyiasas vs Parma |
| ½-½ | 17 |
1973 |
USA it | B31 Sicilian, Rossolimo Variation |
| 7. Biyiasas vs Mecking |
| ½-½ | 27 |
1973 |
Petropolis izt | B50 Sicilian |
| 8. Biyiasas vs Ljubojevic |
| 0-1 | 40 |
1973 |
Petropolis (izt) 16/276 | B24 Sicilian, Closed |
| 9. Biyiasas vs Gheorghiu |
| 0-1 | 39 |
1973 |
Petropolis izt | B42 Sicilian, Kan |
| 10. Biyiasas vs K Spraggett |
 | 0-1 | 45 |
1973 |
Ch. Ouvert du Quebec | B46 Sicilian, Taimanov Variation |
| 11. Biyiasas vs Ljubojevic |
| 0-1 | 40 |
1973 |
Petropolis | B24 Sicilian, Closed |
| 12. Biyiasas vs S Kagan |
 | 1-0 | 40 |
1973 |
Petropolis izt | B31 Sicilian, Rossolimo Variation |
| 13. Biyiasas vs Geller |
 | 1-0 | 40 |
1973 |
Petropolis izt | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 14. Biyiasas vs Smyslov |
| ½-½ | 47 |
1973 |
8, Petropolis izt | B42 Sicilian, Kan |
| 15. Biyiasas vs Browne |
| ½-½ | 74 |
1974 |
02. Panamericano ind. | B30 Sicilian |
| 16. Biyiasas vs K Spraggett |
| 1-0 | 49 |
1975 |
Ch. Canada, Calgary | B40 Sicilian |
| 17. Biyiasas vs N Weinstein |
| 0-1 | 76 |
1975 |
Lone Pine | B50 Sicilian |
| 18. Biyiasas vs M Damjanovic |
| 1-0 | 38 |
1975 |
05. Lone Pine op | B30 Sicilian |
| 19. Biyiasas vs G Sigurjonsson |
| ½-½ | 37 |
1975 |
Lone Pine | B26 Sicilian, Closed, 6.Be3 |
| 20. Biyiasas vs M Diesen |
| ½-½ | 42 |
1976 |
Lone Pine | B23 Sicilian, Closed |
| 21. Biyiasas vs F Street |
| 1-0 | 32 |
1976 |
Lone Pine | B80 Sicilian, Scheveningen |
| 22. Biyiasas vs Quinteros |
| 0-1 | 40 |
1976 |
Izt (cat.12) | B40 Sicilian |
| 23. Biyiasas vs Jones |
| ½-½ | 74 |
1976 |
Lone Pine | B24 Sicilian, Closed |
| 24. Biyiasas vs Ljubojevic |
| ½-½ | 41 |
1976 |
Manila izt | B29 Sicilian, Nimzovich-Rubinstein |
| 25. Biyiasas vs Mecking |
| ½-½ | 41 |
1976 |
11. izt | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |