Games played by Mark C Diesen
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Diesen, M | Klein, T | 1-0  |
41 | A47 | 1972 | USA op |
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| Diesen, M | Saidy, A | 0-1 |
48 | B99 | 1972 | USA op |
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| Diesen, M | Gruchacz, R | 0-1 |
32 | B98 | 1972 | USA op |
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| Browne, W | Diesen, M | ½-½ |
50 | B05 | 1972 | USA op |
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| Brandts, P | Diesen, M | 0-1 |
49 | D97 | 1972 | USA op |
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| Burgar, W | Diesen, M | 0-1 |
55 | B05 | 1972 | USA op |
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| Mayer, H | Diesen, M | 0-1 |
42 | B05 | 1972 | USA op |
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| Burkett, M | Diesen, M | 0-1 |
32 | C17 | 1971 | USA-72ch |
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| Biyiasas, P | Diesen, M | 1-0 |
60 | C15 | 1971 | USA-72ch |
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