| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. B Koch vs C Ahues |
| ½-½ | 28 | 1931 | 27th German Chess Federation Congress | B58 Sicilian |
| 52. B Koch vs L Engels |
| 1-0 | 30 | 1931 | 27th German Chess Federation Congress | D05 Queen's Pawn Game |
| 53. L Roedl vs B Koch |
| 0-1 | 41 | 1931 | 27th German Chess Federation Congress | B58 Sicilian |
| 54. L Rellstab vs B Koch |
| ½-½ | 31 | 1931 | 27th German Chess Federation Congress | B74 Sicilian, Dragon, Classical |
| 55. B Koch vs Y Porat |
 | 0-1 | 28 | 1931 | 27th German Chess Federation Congress | A40 Queen's Pawn Game |
| 56. B Koch vs J Mieses |
| ½-½ | 51 | 1931 | 27th German Chess Federation Congress | D12 Queen's Gambit Declined Slav |
| 57. B Moritz vs B Koch |
| ½-½ | 54 | 1931 | 27th German Chess Federation Congress | A82 Dutch, Staunton Gambit |
| 58. G Weissgerber vs B Koch |
| 1-0 | 48 | 1931 | 27th German Chess Federation Congress | D63 Queen's Gambit Declined, Orthodox Defense |
| 59. K Helling vs B Koch |
| 1-0 | 32 | 1931 | 27th German Chess Federation Congress | A45 Queen's Pawn Game |
| 60. B Koch vs P Leonhardt |
| 1-0 | 37 | 1931 | Zoppot | D05 Queen's Pawn Game |
| 61. S Fuchs vs B Koch |
| 0-1 | 71 | 1931 | Zoppot | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 62. Melamed vs B Koch |
| 1-0 | 22 | 1931 | Zoppot | A22 English |
| 63. B Koch vs Simon Gordon |
| 1-0 | 61 | 1931 | Zoppot | A46 Queen's Pawn Game |
| 64. Saemisch vs B Koch |
| ½-½ | 31 | 1931 | Zoppot | D55 Queen's Gambit Declined |
| 65. B Koch vs H Mueller |
| 1-0 | 23 | 1931 | Zoppot | D02 Queen's Pawn Game |
| 66. B Koch vs Noteboom |
| 0-1 | 33 | 1931 | Berliner Schachgesellschaft-ch | B92 Sicilian, Najdorf, Opocensky Variation |
| 67. K Richter vs B Koch |
| ½-½ | 32 | 1931 | Schachgesellschaft Ch | B62 Sicilian, Richter-Rauzer |
| 68. B Koch vs A Babel |
| 1-0 | 32 | 1931 | Schachgesellschaft Ch | B60 Sicilian, Richter-Rauzer |
| 69. S Rotenstein vs B Koch |
| 1-0 | 35 | 1932 | Berlin League | D63 Queen's Gambit Declined, Orthodox Defense |
| 70. K Richter vs B Koch |
| 1-0 | 29 | 1932 | Berlin-ch | E12 Queen's Indian |
| 71. R Elstner vs B Koch |
| 0-1 | 31 | 1932 | Berlin-ch | A25 English |
| 72. B Koch vs W Kuppe |
| 1-0 | 12 | 1932 | Berlin | B62 Sicilian, Richter-Rauzer |
| 73. B Koch vs W John |
| ½-½ | 69 | 1932 | Berlin-ch | C05 French, Tarrasch |
| 74. S Rotenstein vs B Koch |
| 0-1 | 51 | 1932 | Berlin-ch | A47 Queen's Indian |
| 75. B Koch vs A Babel |
| 1-0 | 18 | 1932 | Schachgesellschaft Winter Tour. | B62 Sicilian, Richter-Rauzer |
Kibitzing
