| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M Heitmann vs F Just |
| 1-0 | 20 | 1980 | FRG corr | B09 Pirc, Austrian Attack |
| 2. M Heitmann vs P Schaaf |
| ½-½ | 69 | 1982 | FRG-Cup9 corr | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 3. M Heitmann vs M Bauer |
| 1-0 | 36 | 1983 | FRG-ch19 corr8386 | A15 English |
| 4. M Heitmann vs W Haufe |
| ½-½ | 75 | 1983 | FRG-ch19 corr8386 | A30 English, Symmetrical |
| 5. M Heitmann vs C Herbrechtsmeier |
| ½-½ | 18 | 1983 | FRG-ch19 corr8386 | D34 Queen's Gambit Declined, Tarrasch |
| 6. M Heitmann vs W Neumann |
| 1-0 | 40 | 1983 | FRG-ch19 sf corr | B01 Scandinavian |
| 7. M Heitmann vs M Nimtz |
| 0-1 | 36 | 1983 | FRG-ch19 corr8386 | A04 Reti Opening |
| 8. M Heitmann vs P Schaaf |
| ½-½ | 21 | 1983 | FRG-ch19 corr8386 | A13 English |
| 9. M Heitmann vs H Volz |
| 1-0 | 19 | 1983 | FRG-ch19 corr8386 | A15 English |
| 10. M Heitmann vs A Waltemathe |
| 1-0 | 25 | 1983 | FRG-ch19 sf corr | B09 Pirc, Austrian Attack |
| 11. M Heitmann vs W Zschunke |
| ½-½ | 28 | 1983 | FRG-ch19 corr8386 | A17 English |
| 12. H Huerter vs M Heitmann |
| 1-0 | 35 | 1983 | FRG-ch19 corr8386 | C18 French, Winawer |
| 13. M Kern vs M Heitmann |
| ½-½ | 46 | 1983 | FRG-ch19 corr8386 | C18 French, Winawer |
| 14. P Kopp vs M Heitmann |
| 0-1 | 41 | 1983 | FRG-ch19 corr8386 | C00 French Defense |
| 15. J Lanzendoerfer vs M Heitmann |
| 1-0 | 61 | 1983 | FRG-ch19 corr8386 | D11 Queen's Gambit Declined Slav |
| 16. M Mudelsee vs M Heitmann |
| 1-0 | 67 | 1983 | FRG-ch19 corr8386 | C18 French, Winawer |
| 17. H Risch vs M Heitmann |
| 1-0 | 31 | 1983 | FRG-ch19 corr8386 | C15 French, Winawer |
| 18. W Class vs M Heitmann |
| ½-½ | 45 | 1983 | FRG-ch19 corr8386 | C09 French, Tarrasch, Open Variation, Main line |
| 19. A Fischer vs M Heitmann |
| ½-½ | 42 | 1983 | FRG-ch19 corr8386 | A07 King's Indian Attack |
| 20. M Heitmann vs K Ahlers |
| 1-0 | 35 | 1983 | FRG-ch19 corr8386 | D11 Queen's Gambit Declined Slav |
| 21. J Lanzendoerfer vs M Heitmann |
| 1-0 | 59 | 1985 | GER-ch19 fin corr | D11 Queen's Gambit Declined Slav |
| 22. M Heitmann vs Z Sarosy |
| 1-0 | 28 | 1988 | W-ch GT242 corr | A30 English, Symmetrical |
| 23. S Busemann vs M Heitmann |
| 1-0 | 42 | 1988 | FRG-Cup corr | C05 French, Tarrasch |
| 24. W Riemer vs M Heitmann |
| 0-1 | 44 | 1988 | WT/M/GT/242 | D31 Queen's Gambit Declined |
| 25. M Heitmann vs Y Gelemerov |
| 0-1 | 36 | 1990 | Bogatyrchuk mem corr9092 | A22 English |
Kibitzing
