“Shashki” (Riga), 12-1973 [1395]
Other thematic variants of this Zadacha, please, see below:
Thematic variant: 1. 28-23 40x47 2. 19-14 29x20 3. 12x40 35x49 4. 45-40 49x35 5. 08-13 35x08 6. 02x15 47-20 7. 15x47 [36].