| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M Illescas vs Y Kosashvili |
 | 1-0 | 33 | 1986 | Holon Open 1986/87 | E06 Catalan, Closed, 5.Nf3 |
| 2. Y Gruenfeld vs Y Kosashvili |
| ½-½ | 72 | 1986 | Holon Open 1986/87 | C84 Ruy Lopez, Closed |
| 3. V Alterman vs Y Kosashvili |
| ½-½ | 29 | 1986 | Holon Open 1986/87 | D31 Queen's Gambit Declined |
| 4. Y Kosashvili vs Shamai |
| 1-0 | 35 | 1986 | Holon Open 1986/87 | B83 Sicilian |
| 5. Y Kosashvili vs Y Gruenfeld |
| 0-1 | 38 | 1986 | Israeli Championship | B20 Sicilian |
| 6. S Kagan vs Y Kosashvili |
| 1-0 | 36 | 1986 | Israeli Championship | C42 Petrov Defense |
| 7. N Birnboim vs Y Kosashvili |
| 1-0 | 51 | 1986 | Israeli Championship | E06 Catalan, Closed, 5.Nf3 |
| 8. O Bruk vs Y Kosashvili |
| ½-½ | 50 | 1986 | Israeli Championship | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 9. Y Kosashvili vs I Veinger |
| ½-½ | 82 | 1986 | Israeli Championship | B01 Scandinavian |
| 10. Y Kosashvili vs Y Afek |
| 0-1 | 39 | 1986 | Israeli Championship | B70 Sicilian, Dragon Variation |
| 11. Y Kraidman vs Y Kosashvili |
| ½-½ | 32 | 1986 | Israeli Championship | D59 Queen's Gambit Declined, Tartakower |
| 12. Y Kosashvili vs S Dudakov |
| ½-½ | 26 | 1986 | Israeli Championship | B08 Pirc, Classical |
| 13. V Alterman vs Y Kosashvili |
| ½-½ | 17 | 1986 | Israeli Championship | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 14. N Grinberg vs Y Kosashvili |
| 0-1 | 13 | 1986 | Israeli Championship | C53 Giuoco Piano |
| 15. Y Kosashvili vs E Shvidler |
| 0-1 | 38 | 1986 | Israeli Championship | C91 Ruy Lopez, Closed |
| 16. Y Kosashvili vs I Manor |
| 1-0 | 68 | 1986 | Israeli Championship | B33 Sicilian |
| 17. A Greenfeld vs Y Kosashvili |
| ½-½ | 35 | 1986 | Israeli Championship | C84 Ruy Lopez, Closed |
| 18. M Kotliar vs Y Kosashvili |
| ½-½ | 58 | 1986 | Israeli Championship | C50 Giuoco Piano |
| 19. Y Kosashvili vs G Rechlis |
| 0-1 | 39 | 1986 | Israeli Championship | B62 Sicilian, Richter-Rauzer |
| 20. Adams vs Y Kosashvili |
| 1-0 | 61 | 1986 | 10th Lloyds Bank Masters Open | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 21. Y Kosashvili vs H Wegner |
| ½-½ | 19 | 1986 | 10th Lloyds Bank Masters Open | B44 Sicilian |
| 22. S Conquest vs Y Kosashvili |
| 1-0 | 26 | 1986 | 10th Lloyds Bank Masters Open | D35 Queen's Gambit Declined |
| 23. Gufeld vs Y Kosashvili |
| ½-½ | 42 | 1989 | Biel MTO op | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 24. Y Kosashvili vs R Storm |
| 1-0 | 26 | 1989 | Biel MTO op | B01 Scandinavian |
| 25. Y Kosashvili vs N Davies |
| 1-0 | 50 | 1989 | Tel Aviv-B | B06 Robatsch |
Kibitzing
