| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. S Makarichev vs P Mack |
| 1-0 | 41 | 1973 | European Junior Championship 1973/74 | A10 English |
| 27. P Mack vs J Mestel |
| ½-½ | 17 | 1973 | European Junior Championship 1973/74 | A00 Uncommon Opening |
| 28. H Koopman vs P Mack |
| ½-½ | 48 | 1973 | European Junior Championship 1973/74 | C17 French, Winawer, Advance |
| 29. P Mack vs S Bjarnason |
| ½-½ | 39 | 1974 | European Junior Championship 1973/74 | A00 Uncommon Opening |
| 30. P Mack vs V Inkiov |
| ½-½ | 16 | 1974 | European Junior Championship 1973/74 | A00 Uncommon Opening |
| 31. J Pinter vs P Mack |
| ½-½ | 52 | 1974 | European Junior Championship 1973/74 | C05 French, Tarrasch |
| 32. A Kochyev vs P Mack |
| ½-½ | 20 | 1974 | World Junior Championship qual | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 33. R Dieks vs P Mack |
| 1-0 | 27 | 1974 | World Junior Championship Final-A | D85 Grunfeld |
| 34. Marjanovic vs P Mack |
| 0-1 | 37 | 1974 | World Junior Championship Final-A | C05 French, Tarrasch |
| 35. Miles vs P Mack |
| ½-½ | 52 | 1974 | World Junior Championship Final-A | A04 Reti Opening |
| 36. Miles vs P Mack |
 | 1-0 | 41 | 1974 | World Junior Championship qual | A05 Reti Opening |
| 37. P Mack vs R Panes |
| 1-0 | 40 | 1974 | World Junior Championship qual | D02 Queen's Pawn Game |
| 38. P Mack vs A Kochyev |
| 1-0 | 41 | 1974 | World Junior Championship Final-A | E91 King's Indian |
| 39. P Mack vs R Staudt |
| 1-0 | 20 | 1975 | 1st EEC Team Championship | A28 English |
| 40. P Boersma vs P Mack |
 | 0-1 | 43 | 1975 | 1st EEC Team Championship | B33 Sicilian |
| 41. A Zichichi vs P Mack |
| 1-0 | 46 | 1975 | 1st EEC Team Championship | B31 Sicilian, Rossolimo Variation |
| 42. J M Cummins vs P Mack |
| 0-1 | 38 | 1975 | 1st EEC Team Championship | A01 Nimzovich-Larsen Attack |
| 43. P Mack vs J Goormachtigh |
| ½-½ | 26 | 1975 | 1st EEC Team Championship | A22 English |
| 44. N Giffard vs P Mack |
| 0-1 | 40 | 1975 | 1st EEC Team Championship | D91 Grunfeld, 5.Bg5 |
| 45. P Mack vs Huebner |
| 1-0 | 28 | 1976 | GER-SW chT 7576 | A07 King's Indian Attack |
| 46. P Mack vs G Siegel |
| 1-0 | 84 | 1981 | Baden-ch MA | A04 Reti Opening |
| 47. H Freise vs P Mack |
| 1-0 | 73 | 1981 | Baden Kongress Meisterturnier A | D94 Grunfeld |
| 48. P Mack vs Lobron |
| 0-1 | 42 | 1983 | Bundesliga 8384 | D34 Queen's Gambit Declined, Tarrasch |
| 49. H Bastian vs P Mack |
| ½-½ | 52 | 1984 | Bundesliga 8384 | C02 French, Advance |
| 50. P Mack vs G Andruet |
| 0-1 | 34 | 1986 | Bundesliga 1986/87 | E19 Queen's Indian, Old Main line, 9.Qxc3 |
Kibitzing
