| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Hur Yasin vs Y Kosashvili |
| 0-1 | 54 | 1989 | EUR-chT (Open) 9th | C77 Ruy Lopez |
| 27. M Lanzani vs Y Kosashvili |
| ½-½ | 40 | 1989 | EUR-chT (Open) 9th | C55 Two Knights Defense |
| 28. Y Kosashvili vs P Haba |
| 1-0 | 38 | 1989 | EUR-chT (Open) 9th | C80 Ruy Lopez, Open |
| 29. Y Kosashvili vs C Menghi |
| ½-½ | 71 | 1989 | European Junior Championship 1989/90 | B18 Caro-Kann, Classical |
| 30. A Tzermiadianos vs Y Kosashvili |
| 0-1 | 40 | 1989 | European Junior Championship 1989/90 | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 31. Y Kosashvili vs J Degraeve |
| ½-½ | 30 | 1989 | European Junior Championship 1989/90 | B31 Sicilian, Rossolimo Variation |
| 32. Hracek vs Y Kosashvili |
| 1-0 | 26 | 1989 | European Junior Championship 1989/90 | C91 Ruy Lopez, Closed |
| 33. Y Kosashvili vs P Sjodahl |
| 1-0 | 42 | 1989 | European Junior Championship 1989/90 | C07 French, Tarrasch |
| 34. D Anagnostopoulos vs Y Kosashvili |
| ½-½ | 12 | 1989 | European Junior Championship 1989/90 | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 35. J Norri vs Y Kosashvili |
| 1-0 | 47 | 1989 | European Junior Championship 1989/90 | E00 Queen's Pawn Game |
| 36. Y Kosashvili vs Van Wely |
| 0-1 | 42 | 1989 | European Junior Championship 1989/90 | B83 Sicilian |
| 37. Y Kosashvili vs L Hjelmas |
| 1-0 | 41 | 1989 | European Junior Championship 1989/90 | C07 French, Tarrasch |
| 38. J Bosch vs Y Kosashvili |
| 0-1 | 41 | 1989 | European Junior Championship 1989/90 | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 39. Y Kosashvili vs M Stangl |
| 0-1 | 31 | 1989 | European Junior Championship 1989/90 | B50 Sicilian |
| 40. P Atkinson vs Y Kosashvili |
| 0-1 | 28 | 1989 | European Junior Championship 1989/90 | C41 Philidor Defense |
| 41. V Beim vs Y Kosashvili |
| ½-½ | 26 | 1990 | Tel-Aviv BIKURI | E32 Nimzo-Indian, Classical |
| 42. L Galego vs Y Kosashvili |
| ½-½ | 48 | 1990 | Tel Aviv BIKURI | C25 Vienna |
| 43. Y Kosashvili vs Taimanov |
 | 0-1 | 61 | 1990 | Tel-Aviv BIKURI | B46 Sicilian, Taimanov Variation |
| 44. D Pedzich vs Y Kosashvili |
| 0-1 | 40 | 1990 | European Junior Championship 1989/90 | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 45. Y Kosashvili vs M Hennigan |
| 1-0 | 32 | 1990 | World Junior Championship | B06 Robatsch |
| 46. Y Kosashvili vs A Rodriguez Vila |
| 1-0 | 36 | 1990 | World Junior Championship | C05 French, Tarrasch |
| 47. B Alterman vs Y Kosashvili |
| ½-½ | 22 | 1990 | World Junior Championship | E17 Queen's Indian |
| 48. V Akopian vs Y Kosashvili |
| ½-½ | 42 | 1990 | World Junior Championship | C96 Ruy Lopez, Closed |
| 49. Y Kosashvili vs M Ulybin |
| 0-1 | 34 | 1990 | World Junior Championship | C05 French, Tarrasch |
| 50. J Sorensen vs Y Kosashvili |
| 0-1 | 40 | 1990 | World Junior Championship | C27 Vienna Game |
Kibitzing
