| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Sax vs Ermenkov |
| 0-1 | 25 |
1975 |
Vraca zt | B89 Sicilian |
| 27. Ermenkov vs Jansa |
| ½-½ | 57 |
1975 |
Cienfuegos | B85 Sicilian, Scheveningen, Classical |
| 28. Ermenkov vs M Czerniak |
| 1-0 | 41 |
1975 |
Vraca zt | C03 French, Tarrasch |
| 29. Suetin vs Ermenkov |
| ½-½ | 18 |
1976 |
Lublin (Poland) | B32 Sicilian |
| 30. Lutikov vs Ermenkov |
 | 1-0 | 19 |
1976 |
Albena International | B31 Sicilian, Rossolimo Variation |
| 31. Ermenkov vs A Kuligowski |
| ½-½ | 52 |
1976 |
Lublin | A46 Queen's Pawn Game |
| 32. Robatsch vs Ermenkov |
| 0-1 | 40 |
1976 |
05 | A16 English |
| 33. Ermenkov vs P Ostojic |
| 1-0 | 23 |
1977 |
Kecskemet | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 34. Tseshkovsky vs Ermenkov |
| ½-½ | 37 |
1977 |
Albena | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 35. Ermenkov vs M V Ghinda |
| ½-½ | 39 |
1977 |
Balkaniad (Men) 09th | B84 Sicilian, Scheveningen |
| 36. Ermenkov vs D Rajkovic |
| ½-½ | 47 |
1977 |
Albena | B70 Sicilian, Dragon Variation |
| 37. Ermenkov vs Romanishin |
| ½-½ | 28 |
1977 |
Cienfuegos | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 38. Ermenkov vs L Spassov |
| 1-0 | 55 |
1977 |
Smoljan/Pamporovo | B93 Sicilian, Najdorf, 6.f4 |
| 39. Ermenkov vs Nunn |
| 0-1 | 41 |
1977 |
Moscow ETC | A49 King's Indian, Fianchetto without c4 |
| 40. Ermenkov vs Velimirovic |
| ½-½ | 62 |
1977 |
EU-chT (Men) | C77 Ruy Lopez |
| 41. Ermenkov vs Tringov |
| ½-½ | 13 |
1978 |
Titovo Uzice | A36 English |
| 42. Ermenkov vs Z Lanka |
| 0-1 | 57 |
1978 |
Yurmala | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 43. Lutikov vs Ermenkov |
| 1-0 | 80 |
1978 |
Jurmala | C33 King's Gambit Accepted |
| 44. Ermenkov vs Smejkal |
| ½-½ | 19 |
1978 |
Titovo Uzice | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 45. Ermenkov vs Velimirovic |
| ½-½ | 64 |
1978 |
Balkaniad (Men) 10th | B34 Sicilian, Accelerated Fianchetto |
| 46. Jansa vs Ermenkov |
 | 1-0 | 32 |
1978 |
Vrnjacka Banja | B84 Sicilian, Scheveningen |
| 47. Ermenkov vs Polugaevsky |
 | 0-1 | 36 |
1978 |
Buenos Aires | B90 Sicilian, Najdorf |
| 48. W Schmidt vs Ermenkov |
| ½-½ | 18 |
1978 |
Vrnjacka Banja | A30 English, Symmetrical |
| 49. Ermenkov vs Ribli |
| ½-½ | 17 |
1978 |
Buenos Aires ol (Men) | B92 Sicilian, Najdorf, Opocensky Variation |
| 50. Ermenkov vs Bagirov |
| ½-½ | 43 |
1978 |
Titovo Uzice | B18 Caro-Kann, Classical |