| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Petrosian vs Y Kotkov |
| ½-½ | 21 | 1956 | URS-ch sf Tbilisi | A36 English |
| 27. Y Kotkov vs B Voronkov |
| 1-0 | 27 | 1956 | URS-ch sf Tbilisi | C67 Ruy Lopez |
| 28. G Kasparian vs Y Kotkov |
| ½-½ | 18 | 1956 | URS-ch sf Tbilisi | B27 Sicilian |
| 29. Y Kotkov vs A Buslaev |
| ½-½ | 17 | 1956 | URS-ch sf Tbilisi | C79 Ruy Lopez, Steinitz Defense Deferred |
| 30. Antoshin vs Y Kotkov |
| 1-0 | 51 | 1956 | URS-ch sf Tbilisi | E75 King's Indian, Averbakh, Main line |
| 31. Y Kotkov vs Korchnoi |
| ½-½ | 25 | 1956 | URS-ch sf Tbilisi | C94 Ruy Lopez, Closed, Breyer Defense |
| 32. J Yuchtman vs Y Kotkov |
| 1-0 | 36 | 1956 | URS-ch sf Tbilisi | B27 Sicilian |
| 33. Y Kotkov vs B Gurgenidze |
| 1-0 | 57 | 1956 | URS-ch sf Tbilisi | C81 Ruy Lopez, Open, Howell Attack |
| 34. T Giorgadze vs Y Kotkov |
| ½-½ | 33 | 1956 | URS-ch sf Tbilisi | C16 French, Winawer |
| 35. Y Kotkov vs S Khalilbeili |
 | ½-½ | 14 | 1956 | URS-ch sf Tbilisi | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 36. R Nezhmetdinov vs Y Kotkov |
 | 1-0 | 25 | 1957 | Russian Championship | C67 Ruy Lopez |
| 37. N Krogius vs Y Kotkov |
| 1-0 | 34 | 1957 | Russian Championship | A56 Benoni Defense |
| 38. Y Kotkov vs P Dubinin |
| 0-1 | 29 | 1957 | Ch Russia (1/2 final) | C73 Ruy Lopez, Modern Steinitz Defense |
| 39. M Usachy vs Y Kotkov |
| ½-½ | 60 | 1957 | RUS-UKR | B28 Sicilian, O'Kelly Variation |
| 40. Y Kotkov vs A Lein |
| ½-½ | 35 | 1957 | Russian Championship | C05 French, Tarrasch |
| 41. Y Kotkov vs M Usachy |
| 0-1 | 29 | 1957 | RUS-UKR | C65 Ruy Lopez, Berlin Defense |
| 42. Y Kotkov vs A Usov |
| 1-0 | 51 | 1957 | Russian Championship | C76 Ruy Lopez, Modern Steinitz Defense, Fianchetto Variation |
| 43. Y Kotkov vs M Gosin |
| 1-0 | 30 | 1957 | Russian Championship | B32 Sicilian |
| 44. Y Kotkov vs A Tsvetkov |
| 1-0 | 37 | 1957 | BUL-RUS | C03 French, Tarrasch |
| 45. A Zaitsev vs Y Kotkov |
| 0-1 | 50 | 1958 | Ch Russia (team 1/2 final) | B41 Sicilian, Kan |
| 46. Y Kotkov vs N Krogius |
| 0-1 | 48 | 1958 | Ch Russia (team 1/2 final) | B44 Sicilian |
| 47. A Lein vs Y Kotkov |
| 0-1 | 57 | 1958 | Ch Russia (1/2 final) | A49 King's Indian, Fianchetto without c4 |
| 48. Y Kotkov vs Y Shaposhnikov |
| 0-1 | 36 | 1958 | Russian Championship | B96 Sicilian, Najdorf |
| 49. Y Kotkov vs R Nezhmetdinov |
| 0-1 | 53 | 1958 | Russian Championship | C96 Ruy Lopez, Closed |
| 50. Furman vs Y Kotkov |
| 1-0 | 56 | 1958 | Russian Championship | D83 Grunfeld, Grunfeld Gambit |
Kibitzing
