The Dutch reformed-christian ‘Reformatorisch Dagblad’ twice a year publishes an extra puzzle issue for its subscribers. This weeks puzzle type is 1-8, invented by Marijke Balmaekers, and published in the childrens section of the ‘Vakantie Doe Boek’ of the reformatorisch Dagblad.
The numbers one to eight have been arranged in a 5×5 grid in such a way that:
- Each of the numbers one to eight is used exactly once
- There are always one or two numbers in every row, column or diagonal
- the sum of the numbers is listed as a clue at the end of the row/column/diagonal