| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. I Andersson vs M Karff |
| 1-0 | 37 | 1937 | World Championship (Women) | E12 Queen's Indian |
| 2. M Lauberte vs M Karff |
| 1-0 | 73 | 1937 | World Championship (Women) | E12 Queen's Indian |
| 3. A Rivero vs M Karff |
 | 0-1 | 38 | 1938 | United States Championship (Women) | A90 Dutch |
| 4. M Karff vs E Wray |
| 0-1 | 33 | 1939 | US Open (Women) | B01 Scandinavian |
| 5. M Karff vs M Berea de Montero |
| 0-1 | 39 | 1939 | World Championship (Women) | A04 Reti Opening |
| 6. I Larsen vs M Karff |
| 0-1 | 49 | 1939 | World Championship (Women) | A28 English |
| 7. M Karff vs I Andersson |
| 1-0 | 39 | 1939 | World Championship (Women) | A14 English |
| 8. S Reischer vs M Karff |
| 0-1 | 60 | 1939 | World Championship (Women) | D37 Queen's Gambit Declined |
| 9. M Karff vs Graf-Stevenson |
| 1-0 | 78 | 1939 | World Championship (Women) | D12 Queen's Gambit Declined Slav |
| 10. E Rinder vs M Karff |
| 1-0 | 41 | 1939 | World Championship (Women) | A07 King's Indian Attack |
| 11. M Karff vs P Schwartzmann |
| 1-0 | 40 | 1939 | World Championship (Women) | A09 Reti Opening |
| 12. M T Mora Iturralde vs M Karff |
| 0-1 | 53 | 1939 | World Championship (Women) | B54 Sicilian |
| 13. M Karff vs M Stoffels |
| 1-0 | 31 | 1939 | World Championship (Women) | A45 Queen's Pawn Game |
| 14. C Roodzant vs M Karff |
| ½-½ | 44 | 1939 | World Championship (Women) | A52 Budapest Gambit |
| 15. M Karff vs B Carrasco Araya |
| 0-1 | 55 | 1939 | World Championship (Women) | E81 King's Indian, Samisch |
| 16. M de Vigil vs M Karff |
| 0-1 | 35 | 1939 | World Championship (Women) | A07 King's Indian Attack |
| 17. M Karff vs D Trepat de Navarro |
| 1-0 | 63 | 1939 | World Championship (Women) | A15 English |
| 18. M Lauberte vs M Karff |
| 0-1 | 39 | 1939 | World Championship (Women) | A47 Queen's Indian |
| 19. M Karff vs B Janeckova |
| ½-½ | 97 | 1939 | World Championship (Women) | B13 Caro-Kann, Exchange |
| 20. E Raclauskiene vs M Karff |
| 0-1 | 21 | 1939 | World Championship (Women) | A45 Queen's Pawn Game |
| 21. M Karff vs Menchik |
| 0-1 | 47 | 1939 | World Championship (Women) | E60 King's Indian Defense |
| 22. M Karff vs A Lougheed-Freedman |
| 1-0 | 34 | 1939 | World Championship (Women) | D00 Queen's Pawn Game |
| 23. R Bloch Nakkerud vs M Karff |
| 0-1 | 35 | 1939 | World Championship (Women) | D02 Queen's Pawn Game |
| 24. A Rivero vs M Karff |
| 1-0 | 58 | 1940 | United States Championship (Women) | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 25. Capablanca vs M Karff |
 | 0-1 | 25 | 1941 | Simul, 22b | A07 King's Indian Attack |
Kibitzing
