Sudoku Quest

Sudoku is a puzzle that needs little introduction. The object is to put a digit from 1 to N in each cell of the grid so that every row, column, and bold region contains each digit once, where N is the number of rows and columns in the puzzle. (Usually N = 9.) A Sudoku puzzle consists of 81 cells which are divided into nine columns, rows and regions. The task is now to place the numbers from 1 to 9…