Each row, column, and region (to be determined by the solver) must contain all the digits from 1-9. Color all white cells with two colors such that all cells of the same color are orthogonally connected. Cells of the same color cannot touch diagonally and no 2x2 area can be of a single color. Two given cells have been provided. Next, divide the grid into 9 regions (the center region is already given). All cells in the region must be the same color. Cages sum to the total in the corner, if given. All cells in a cage belong to the same region. The center region is a magic square, where all rows, columns, and diagonals sum to the same amount.
Solution code: Row 1 and Column 7 (no spaces)
on 14. November 2022, 12:43 by StefanSch
Verry nice!