| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A H Pettersson vs J Perlis |
 | 1-0 | 66 | 1905 | Barmen Meisterturnier B | C50 Giuoco Piano |
| 27. E Post vs A H Pettersson |
| 1-0 | 50 | 1905 | Barmen Meisterturnier B | D50 Queen's Gambit Declined |
| 28. H Suechting vs A H Pettersson |
| 1-0 | 29 | 1906 | Stockholm | C78 Ruy Lopez |
| 29. J Moller vs A H Pettersson |
| 1-0 | 32 | 1906 | Stockholm | D51 Queen's Gambit Declined |
| 30. A H Pettersson vs G Marco |
| 0-1 | 26 | 1906 | Stockholm | C41 Philidor Defense |
| 31. A H Pettersson vs J Giersing |
| 0-1 | 77 | 1906 | Stockholm | C78 Ruy Lopez |
| 32. R Loman vs A H Pettersson |
| 0-1 | 41 | 1906 | Stockholm | B01 Scandinavian |
| 33. F Englund vs A H Pettersson |
| 1-0 | 36 | 1906 | Stockholm | D51 Queen's Gambit Declined |
| 34. A H Pettersson vs Schlechter |
| 0-1 | 41 | 1906 | Stockholm | C50 Giuoco Piano |
| 35. A H Pettersson vs V Sjoberg |
| 0-1 | 60 | 1906 | Stockholm | B40 Sicilian |
| 36. O Bernstein vs A H Pettersson |
| 1-0 | 31 | 1906 | Stockholm | D51 Queen's Gambit Declined |
| 37. S O Svensson vs A H Pettersson |
| 0-1 | 43 | 1906 | Stockholm | B01 Scandinavian |
| 38. A H Pettersson vs J Mieses |
| 0-1 | 55 | 1906 | Stockholm | D52 Queen's Gambit Declined |
Kibitzing
