Sayt “MiF”, tema “Shashechnyye golovolomki” [80], 19-05-2019
Other thematic variants of this Zadacha, please, see below:
Thematic variant: 1. 18-12 2x11x22x36x47x20 2. 15x29 25x14 3. 05x37 08x26 4. 13-31 [26].