Games played by Alexander Jongsma
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Jongsma, A | Rabinowitz, B | 1-0  |
37 | D78 | 1957 | Wch U20 |
|
||
| Aldrete, J | Jongsma, A | 0-1 |
36 | B55 | 1957 | Wch U20 |
|
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Jongsma, A | Rabinowitz, B | 1-0 |
37 | D78 | 1957 | Wch U20 |
|
||
| Aldrete, J | Jongsma, A | 0-1 |
36 | B55 | 1957 | Wch U20 |
|