Normal sudoku rules apply. A number outside the grid gives the sum of the digits sandwiched between the 1 and 9 in that row/column. Orthogonally adjacent cells must not add up to 5 or 10.
Normal sudoku rules apply. A number outside the grid gives the sum of the digits sandwiched between the 1 and 9 in that row/column. Orthogonally adjacent cells must not add up to 5 or 10.