| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 101. J Kostro vs L Zinn |
| 1-0 | 58 | 1961 | Warsaw | B33 Sicilian |
| 102. Lengyel vs J Kostro |
| ½-½ | 51 | 1961 | Warsaw | E14 Queen's Indian |
| 103. G Mititelu vs J Kostro |
| 1-0 | 20 | 1961 | Warsaw | D34 Queen's Gambit Declined, Tarrasch |
| 104. Tolush vs J Kostro |
| 1-0 | 30 | 1961 | Warsaw | E29 Nimzo-Indian, Samisch |
| 105. S Szczepaniec vs J Kostro |
| 0-1 | 20 | 1963 | EUR corr | C29 Vienna Gambit |
| 106. A Najdekier vs J Kostro |
| ½-½ | 69 | 1964 | POL-ch 21th | C44 King's Pawn Game |
| 107. Hort vs J Kostro |
 | 1-0 | 34 | 1964 | Rubinstein Memorial | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 108. Parma vs J Kostro |
| 1-0 | 36 | 1964 | Rubinstein Memorial | C94 Ruy Lopez, Closed, Breyer Defense |
| 109. S Witkowski vs J Kostro |
| ½-½ | 54 | 1964 | Rubinstein Memorial | C45 Scotch Game |
| 110. J Kostro vs Velimirovic |
| 0-1 | 80 | 1964 | Rubinstein Memorial | B28 Sicilian, O'Kelly Variation |
| 111. W Schmidt vs J Kostro |
 | 1-0 | 29 | 1964 | Rubinstein Memorial | C19 French, Winawer, Advance |
| 112. M Czerniak vs J Kostro |
| 1-0 | 29 | 1964 | Rubinstein Memorial | B13 Caro-Kann, Exchange |
| 113. A Filipowicz vs J Kostro |
| 1-0 | 58 | 1964 | Rubinstein Memorial | C87 Ruy Lopez |
| 114. J Kostro vs L Zinn |
| 1-0 | 48 | 1964 | Rubinstein Memorial | C90 Ruy Lopez, Closed |
| 115. J Kostro vs W Balcerowski |
| 0-1 | 53 | 1964 | Rubinstein Memorial | B08 Pirc, Classical |
| 116. J Kostro vs Tolush |
| 1-0 | 69 | 1964 | Rubinstein Memorial | C60 Ruy Lopez |
| 117. A Novopashin vs J Kostro |
| ½-½ | 30 | 1964 | Rubinstein Memorial | C92 Ruy Lopez, Closed |
| 118. J Kostro vs Kavalek |
| 1-0 | 57 | 1964 | Rubinstein Memorial | B43 Sicilian, Kan, 5.Nc3 |
| 119. A Tsvetkov vs J Kostro |
| 1-0 | 38 | 1964 | Rubinstein Memorial | E09 Catalan, Closed |
| 120. J Kostro vs B Pietrusiak |
| 0-1 | 47 | 1964 | Rubinstein Memorial | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 121. J Kostro vs Simagin |
| 0-1 | 37 | 1966 | Varna | B62 Sicilian, Richter-Rauzer |
| 122. W Schmidt vs J Kostro |
| ½-½ | 23 | 1966 | Polish Championship | A46 Queen's Pawn Game |
| 123. T Zoltek vs J Kostro |
| ½-½ | 22 | 1966 | Polish Championship | B18 Caro-Kann, Classical |
| 124. J Kostro vs M Ziembinski |
| 1-0 | 61 | 1966 | Polish Championship | C92 Ruy Lopez, Closed |
| 125. A Sydor vs J Kostro |
| 1-0 | 20 | 1966 | Polish Championship | B44 Sicilian |
Kibitzing
