| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Savon vs Biyiasas |
 | 1-0 | 71 |
1973 |
Petropolis izt | E81 King's Indian, Samisch |
| 27. Polugaevsky vs Biyiasas |
 | 1-0 | 27 |
1973 |
Petropolis izt | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 28. L A Tan vs Biyiasas |
| ½-½ | 57 |
1973 |
Petropolis izt | C55 Two Knights Defense |
| 29. Hort vs Biyiasas |
| 1-0 | 41 |
1973 |
Petropolis | D45 Queen's Gambit Declined Semi-Slav |
| 30. Biyiasas vs Keres |
 | ½-½ | 33 |
1973 |
Petropolis izt (30.07.73) | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 31. Biyiasas vs Bisguier |
| ½-½ | 47 |
1973 |
USA it | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 32. Bronstein vs Biyiasas |
| ½-½ | 43 |
1973 |
Izt | C77 Ruy Lopez |
| 33. Biyiasas vs Hug |
 | 1-0 | 22 |
1973 |
Petropolis izt | B40 Sicilian |
| 34. L Day vs Biyiasas |
| 1-0 | 92 |
1974 |
Quebec Open | C95 Ruy Lopez, Closed, Breyer |
| 35. Biyiasas vs Browne |
| ½-½ | 74 |
1974 |
02. Panamericano ind. | B30 Sicilian |
| 36. Biyiasas vs M Damjanovic |
| 1-0 | 38 |
1975 |
05. Lone Pine op | B30 Sicilian |
| 37. Biyiasas vs G Sigurjonsson |
| ½-½ | 37 |
1975 |
Lone Pine | B26 Sicilian, Closed, 6.Be3 |
| 38. D A Berry vs Biyiasas |
| 0-1 | 27 |
1975 |
Lone Pine | E92 King's Indian |
| 39. C Barnes vs Biyiasas |
| 0-1 | 43 |
1975 |
Lone Pine | B06 Robatsch |
| 40. Biyiasas vs N Weinstein |
| 0-1 | 76 |
1975 |
Lone Pine | B50 Sicilian |
| 41. L Day vs Biyiasas |
| ½-½ | 76 |
1975 |
7, Calgary CAN ch zt | B20 Sicilian |
| 42. Benko vs Biyiasas |
| 1-0 | 46 |
1975 |
Lone Pine | B06 Robatsch |
| 43. Biyiasas vs Browne |
| 0-1 | 65 |
1975 |
Lone Pine (USA) | E67 King's Indian, Fianchetto |
| 44. T Rowan vs Biyiasas |
| 1-0 | 87 |
1975 |
Seattle Open | A04 Reti Opening |
| 45. Biyiasas vs K Spraggett |
| 1-0 | 49 |
1975 |
Ch. Canada, Calgary | B40 Sicilian |
| 46. Biyiasas vs Schmid |
| 1-0 | 46 |
1975 |
Lone Pine op | A10 English |
| 47. A Kushnir vs Biyiasas |
| 0-1 | 65 |
1975 |
Lone Pine | E69 King's Indian, Fianchetto, Classical Main line |
| 48. E Torre vs Biyiasas |
| ½-½ | 48 |
1975 |
Lone Pine (USA) | B13 Caro-Kann, Exchange |
| 49. Biyiasas vs Spassky |
| ½-½ | 29 |
1976 |
Izt ( cat. 12 ) | D38 Queen's Gambit Declined, Ragozin Variation |
| 50. L A Tan vs Biyiasas |
| ½-½ | 86 |
1976 |
Manila izt | C60 Ruy Lopez |