Sudoku(Solver)

A solver to solve all 9*9 Sudoku puzzles. Results will be plotted.

I'm a fan of Sudoku.
It's a solver to deal with those too-difficult Sudoku.
Puzzle matrix is put in OriMat.
Idea of the program is shown in the following:
the problem is solved through 2 steps
step1: with function SudokuMethod1
in each square, list all the possible numbers
if there is only 1 possible numbers, this is the one
if in each row, column or block, one possible number occurs
only once, this is the one
step2: if there is only 2 possible number in one square
try each one to see which one is the correct one