Normal sudoku rules apply. Identical digits cannot be a knight's move apart. Identical digits cannot be a king's move apart. Orthogonally adjacent cells may not contain digits that sum to 5 or 10.
Normal sudoku rules apply. Identical digits cannot be a knight's move apart. Identical digits cannot be a king's move apart. Orthogonally adjacent cells may not contain digits that sum to 5 or 10.