| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. S Kostyra vs A Fekete |
| 1-0 | 51 | 1987 | Myslenice | B04 Alekhine's Defense, Modern |
| 27. S Kostyra vs N Spiridonov |
| 0-1 | 43 | 1987 | Myslenice | B17 Caro-Kann, Steinitz Variation |
| 28. S Kostyra vs R Kasperek |
| 1-0 | 58 | 1987 | Myslenice | C90 Ruy Lopez, Closed |
| 29. K Georgiev vs S Kostyra |
| ½-½ | 13 | 1987 | Myslenice | C92 Ruy Lopez, Closed |
| 30. S Kostyra vs J Sendera |
| ½-½ | 12 | 1987 | Myslenice | C96 Ruy Lopez, Closed |
| 31. L Dobrovolsky vs S Kostyra |
| 1-0 | 37 | 1987 | Myslenice | C70 Ruy Lopez |
| 32. S Kostyra vs F Borkowski |
| 0-1 | 36 | 1987 | Myslenice | A43 Old Benoni |
| 33. J Bednarski vs S Kostyra |
| ½-½ | 14 | 1987 | Myslenice | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 34. B Latas vs S Kostyra |
| 0-1 | 28 | 1987 | Myslenice | C53 Giuoco Piano |
| 35. J Pokojowczyk vs S Kostyra |
| 0-1 | 25 | 1987 | Myslenice | C53 Giuoco Piano |
| 36. M Kolasinski vs S Kostyra |
| ½-½ | 38 | 1987 | Warsaw Cup | A43 Old Benoni |
| 37. S Kostyra vs K Sznapik |
| 1-0 | 40 | 1987 | Warsaw Cup | B06 Robatsch |
| 38. K Znamenacek vs S Kostyra |
| 1-0 | 26 | 1987 | Warsaw Cup | A21 English |
| 39. S Kostyra vs K Marcinkowski |
| 1-0 | 68 | 1987 | Warsaw Cup | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 40. K Packo vs S Kostyra |
| 0-1 | 29 | 1987 | Warsaw Cup | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 41. S Kostyra vs J Kiedrowicz |
| 1-0 | 59 | 1987 | Warsaw Cup | B54 Sicilian |
| 42. P Stempin vs S Kostyra |
| ½-½ | 67 | 1987 | Warsaw Cup | E12 Queen's Indian |
| 43. S Kostyra vs J Petkevich |
| ½-½ | 11 | 1987 | Warsaw Cup | B46 Sicilian, Taimanov Variation |
| 44. A Szypulski vs S Kostyra |
| 0-1 | 32 | 1987 | Warsaw Cup | E12 Queen's Indian |
| 45. Z Jasnikowski vs S Kostyra |
| 1-0 | 41 | 1987 | Warsaw Cup | E15 Queen's Indian |
| 46. S Kostyra vs Blatny |
| 0-1 | 37 | 1987 | Warsaw Cup | C90 Ruy Lopez, Closed |
| 47. Sliwa vs S Kostyra |
| 0-1 | 29 | 1988 | Myslenice | A09 Reti Opening |
| 48. S Kostyra vs G Lukasiewicz |
| ½-½ | 33 | 1988 | Myslenice | D02 Queen's Pawn Game |
| 49. W Kasperek vs S Kostyra |
| 0-1 | 37 | 1988 | Myslenice | E15 Queen's Indian |
| 50. S Kostyra vs P Lados |
| 1-0 | 22 | 1988 | Myslenice | D55 Queen's Gambit Declined |
Kibitzing
