Sayt “MiF”, 15-02-2020, tema “Shashechnyye golovolomki” [659]
Other thematic variants of this Problem, please, see below:
Thematic variant: 1. 31-27 21x32 2. 46x49 29-34 3. 49x15 34x43 4. 15-38 43x32 5. 47-42