Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. NN vs P Leonhardt |
  | 0-1 | 8 | 1903 | Leipzig | C22 Center Game |
2. P Leonhardt vs J Esser |
| 1-0 | 45 | 1903 | 31st DCA Congress, Hilversum | D63 Queen's Gambit Declined, Orthodox Defense |
3. P Leonhardt vs J de Soyres |
 | 1-0 | 26 | 1903 | 31st DCA Congress, Hilversum | C29 Vienna Gambit |
4. P Leonhardt vs Duras |
 | 1-0 | 75 | 1903 | 31st DCA Congress, Hilversum | D63 Queen's Gambit Declined, Orthodox Defense |
5. A Neumann vs P Leonhardt |
 | 0-1 | 95 | 1903 | 31st DCA Congress, Hilversum | C79 Ruy Lopez, Steinitz Defense Deferred |
6. P Leonhardt vs W Meiners |
  | 1-0 | 27 | 1903 | 31st DCA Congress, Hilversum | C50 Giuoco Piano |
7. J W te Kolste vs P Leonhardt |
 | 0-1 | 36 | 1903 | 31st DCA Congress, Hilversum | B12 Caro-Kann Defense |
8. C Trimborn vs P Leonhardt |
| 0-1 | 45 | 1903 | 31st DCA Congress, Hilversum | C48 Four Knights |
9. P Leonhardt vs W Schwan |
 | 1-0 | 25 | 1903 | 31st DCA Congress, Hilversum | C54 Giuoco Piano |
10. P Leonhardt vs A Speijer |
| ½-½ | 71 | 1903 | 31st DCA Congress, Hilversum | C84 Ruy Lopez, Closed |
11. B Leussen vs P Leonhardt |
| ½-½ | 57 | 1903 | 31st DCA Congress, Hilversum | C42 Petrov Defense |
12. P Leonhardt vs F Brown |
 | 1-0 | 82 | 1903 | 31st DCA Congress, Hilversum | C62 Ruy Lopez, Old Steinitz Defense |
13. M Lange vs P Leonhardt |
| 0-1 | 36 | 1903 | 31st DCA Congress, Hilversum | C87 Ruy Lopez |
14. J F Heemskerk vs P Leonhardt |
 | 1-0 | 30 | 1903 | 31st DCA Congress, Hilversum | C68 Ruy Lopez, Exchange |
15. J Vijzelaar vs P Leonhardt |
| 0-1 | 56 | 1903 | 31st DCA Congress, Hilversum | C84 Ruy Lopez, Closed |
16. P Leonhardt vs R Loman |
  | 1-0 | 27 | 1903 | 31st DCA Congress, Hilversum | C78 Ruy Lopez |
17. G Schories vs P Leonhardt |
 | 0-1 | 36 | 1904 | Leonhardt - Schories m | C67 Ruy Lopez |
18. R Griffith vs P Leonhardt |
| 0-1 | 34 | 1904 | City of London CC ch | D52 Queen's Gambit Declined |
19. P Leonhardt vs H W Trenchard |
| 1-0 | 25 | 1904 | City of London CC ch | C63 Ruy Lopez, Schliemann Defense |
20. P Leonhardt vs G Schories |
 | 1-0 | 22 | 1904 | Leonhardt - Schories m | D32 Queen's Gambit Declined, Tarrasch |
21. G Schories vs P Leonhardt |
| 1-0 | 35 | 1904 | Leonhardt - Schories m | C87 Ruy Lopez |
22. P Leonhardt vs R Loman |
 | 1-0 | 20 | 1904 | Match | C67 Ruy Lopez |
23. S Passmore vs P Leonhardt |
| ½-½ | 38 | 1904 | Leonhardt - Passmore | C83 Ruy Lopez, Open |
24. P Leonhardt vs S Passmore |
| 1-0 | 31 | 1904 | Leonhardt - Passmore | D37 Queen's Gambit Declined |
25. S Passmore vs P Leonhardt |
| 0-1 | 30 | 1904 | Leonhardt - Passmore | C54 Giuoco Piano |