Jigsaw Sudoku

Each row, column, and irregular shaped block of 9 cells must have all the digits 1 to 9 only once.

Jigsaw sudoku is very entertaining and challenging version of Sudoku, it is called sometimes Irregular Sudoku. It has different irregular shapes of 9 cells on the board.

Jigsaw Sudoku rule: Each row, column, and irregular shape must have all the digits 1 to 9 only once.