| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Botvinnik vs Riumin |
  | 1-0 | 32 | 1931 | USSR Championship | D11 Queen's Gambit Declined Slav |
| 27. Rauzer vs Riumin |
| 1-0 | 48 | 1931 | USSR Championship | D70 Neo-Grunfeld Defense |
| 28. Riumin vs V G Kirillov |
| 0-1 | 30 | 1931 | USSR Championship | A07 King's Indian Attack |
| 29. S Slonim vs Riumin |
| 0-1 | 20 | 1932 | Moscow | C45 Scotch Game |
| 30. A Sergeiev vs Riumin |
| 0-1 | 23 | 1932 | Moscow | E23 Nimzo-Indian, Spielmann |
| 31. Dus Chotimirsky vs Riumin |
| 1-0 | 34 | 1932 | Moscow | D30 Queen's Gambit Declined |
| 32. Riumin vs N Zubarev |
| 1-0 | 46 | 1932 | Moscow | A46 Queen's Pawn Game |
| 33. Riumin vs Kan |
| 1-0 | 34 | 1932 | Moscow | B13 Caro-Kann, Exchange |
| 34. Riumin vs Botvinnik |
| ½-½ | 30 | 1932 | RUS Radio corr | E34 Nimzo-Indian, Classical, Noa Variation |
| 35. B Verlinsky vs Riumin |
| 0-1 | 31 | 1933 | Moscow Ch | B58 Sicilian |
| 36. I Rabinovich vs Riumin |
| 0-1 | 32 | 1933 | USSR Championship | A84 Dutch |
| 37. L Savitsky vs Riumin |
| ½-½ | 45 | 1933 | USSR Championship | A97 Dutch, Ilyin-Genevsky |
| 38. Riumin vs Levenfish |
| 0-1 | 58 | 1933 | USSR Championship | D37 Queen's Gambit Declined |
| 39. Riumin vs Chekhover |
| 0-1 | 31 | 1933 | USSR Championship | B58 Sicilian |
| 40. Kan vs Riumin |
| 1-0 | 32 | 1933 | USSR Championship | E81 King's Indian, Samisch |
| 41. Kmoch vs Riumin |
| 1-0 | 36 | 1934 | Leningrad | A90 Dutch |
| 42. Kan vs Riumin |
| ½-½ | 38 | 1934 | Leningrad | A53 Old Indian |
| 43. Riumin vs Alatortsev |
| ½-½ | 32 | 1934 | Leningrad | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 44. Lisitsin vs Riumin |
| 0-1 | 71 | 1934 | Leningrad | A07 King's Indian Attack |
| 45. Riumin vs I Rabinovich |
| 1-0 | 32 | 1934 | Leningrad | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 46. Levenfish vs Riumin |
| ½-½ | 29 | 1934 | Leningrad | A91 Dutch Defense |
| 47. Riumin vs Euwe |
| 1-0 | 32 | 1934 | Leningrad | A28 English |
| 48. M Yudovich Sr. vs Riumin |
| ½-½ | 15 | 1934 | Leningrad | C17 French, Winawer, Advance |
| 49. Riumin vs Chekhover |
| 1-0 | 30 | 1934 | Leningrad | A16 English |
| 50. P Romanovsky vs Riumin |
| ½-½ | 16 | 1934 | Leningrad | A04 Reti Opening |
Kibitzing
