| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 76. H Podolsky vs J Kostro |
| ½-½ | 42 | 1961 | Polish Championship | A04 Reti Opening |
| 77. N Borowski vs J Kostro |
 | ½-½ | 56 | 1961 | Polish Championship | D44 Queen's Gambit Declined Semi-Slav |
| 78. J Kostro vs W Balcerowski |
| 1-0 | 35 | 1961 | Polish Championship | B07 Pirc |
| 79. J Kostro vs S Brzozka |
| ½-½ | 19 | 1961 | Polish Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 80. J Kostro vs J Lachut |
| ½-½ | 43 | 1961 | Polish Championship | C97 Ruy Lopez, Closed, Chigorin |
| 81. A Tarnowski vs J Kostro |
| ½-½ | 20 | 1961 | Polish Championship | E15 Queen's Indian |
| 82. R Drozd vs J Kostro |
| 1-0 | 44 | 1961 | Polish Championship | A14 English |
| 83. J Kostro vs A Adamski |
| 1-0 | 87 | 1961 | Polish Championship | B29 Sicilian, Nimzovich-Rubinstein |
| 84. J Kostro vs T Gniot |
| 1-0 | 19 | 1961 | Polish Championship | C95 Ruy Lopez, Closed, Breyer |
| 85. Z Gabrys vs J Kostro |
| 0-1 | 31 | 1961 | Polish Championship | B90 Sicilian, Najdorf |
| 86. J Kostro vs Z Doda |
| 1-0 | 38 | 1961 | Polish Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 87. Sliwa vs J Kostro |
 | 1-0 | 47 | 1961 | Polish Championship | E25 Nimzo-Indian, Samisch |
| 88. J Kostro vs R Grabczewski |
| 0-1 | 56 | 1961 | Polish Championship | C90 Ruy Lopez, Closed |
| 89. S Witkowski vs J Kostro |
| 0-1 | 34 | 1961 | Polish Championship | B90 Sicilian, Najdorf |
| 90. J Ruszczycki vs J Kostro |
| ½-½ | 34 | 1961 | Polish Championship | B12 Caro-Kann Defense |
| 91. J Kostro vs E Klaput |
| 1-0 | 70 | 1961 | Polish Championship | B62 Sicilian, Richter-Rauzer |
| 92. J Kostro vs H Podolsky |
| 0-1 | 35 | 1961 | Warsaw | C16 French, Winawer |
| 93. R Grabczewski vs J Kostro |
| 1-0 | 16 | 1961 | Warsaw | C41 Philidor Defense |
| 94. R Drozd vs J Kostro |
| 1-0 | 51 | 1961 | Warsaw | D44 Queen's Gambit Declined Semi-Slav |
| 95. Tolush vs J Kostro |
| 1-0 | 30 | 1961 | Warsaw | E29 Nimzo-Indian, Samisch |
| 96. J Kostro vs N Minev |
| ½-½ | 53 | 1961 | Warsaw | B18 Caro-Kann, Classical |
| 97. J Kostro vs Sliwa |
| 1-0 | 32 | 1961 | Warsaw | C77 Ruy Lopez |
| 98. J Kostro vs J Bednarski |
| 1-0 | 32 | 1961 | Warsaw | B96 Sicilian, Najdorf |
| 99. J Kostro vs F Stoppel |
| ½-½ | 50 | 1961 | Warsaw | B40 Sicilian |
| 100. G Mititelu vs J Kostro |
| 1-0 | 20 | 1961 | Warsaw | D34 Queen's Gambit Declined, Tarrasch |
Kibitzing
