Fill the grid with digits 1 to 9 so that each row, column and boldly outlined box contains each digit exactly once.
All areas of 2x2 digits where the outcome of a calculation is 20 are marked, where 20 can be reached in one of the two following ways: multiply the two digits on top and either add or subtract the two-digitnumber in the bottom.
Example: 8x6 on top minus 28 in the bottom or 6x1 on top plus 14 in the bottom. For each area it is given in the lower left corner which type of operation should be used.
Solution code: Row 5, Column 3
on 30. August 2021, 15:57 by Realshaggy
Added online-solving link, revised labels.
on 20. April 2020, 18:49 by geronimo92
Very beautiful one and many things to see about possible combination, excellent !
on 20. April 2020, 09:40 by Dandelo
Hmmm. Ich glaube, du hast aus dem Rätseltyp alles rausgeholt. Aber irgendwie gefällt der mir nicht.