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 12-03-2021 Valdas Bieliauskas:

A.Malyuta, A.Balanyuk, R.Matskyavichyus "Tainstva shashechnykh kvadratov" [478], 2015

Other thematic variants of this Zadacha, please, see below:

Thematic variant: 1. 15-10 14-20 2. 38x15 05x14 3. 15-10 14x05 4. 30-24 05-10 5. 24-15 10-14 6. 27-38 36x16 7. 38-24 16x49 8. 47-38 49x46 9. 24-19 14x23 10. 06-28 23x32 11. 48-37 32x41 12. 15-47 [K46; M41, 45].