Normal sudoku rules apply. Additionally, when two arrows face each other, they are crusts of a “sandwich”. Ie The digits in the crust cells must be the sum of the sandwich INCLUDING the crusts, in some order.
Normal sudoku rules apply. Additionally, when two arrows face each other, they are crusts of a “sandwich”. Ie The digits in the crust cells must be the sum of the sandwich INCLUDING the crusts, in some order.