Windoku (Fun With Sudoku #366)

Windoku is nothing but an Extra Region Sudoku with the four extra regions which look like windows. There are however few techniques to solve a Windoku puzzle that differentiates it from the Extra Region Sudoku. Till now there are not many Windoku puzzles on the Fun With Puzzles website. There is only one Windoku puzzle previous to today's Windoku which was published way back in the year 2015 with the title "Windoku (Daily Sudoku League #117)". There was another new variation which I prepared recently named "Anti Windoku". Today's Windoku is for the practice of the 6th round of Sudoku Grand Prix 2018. This Windoku I am publishing as part of the Fun With Sudoku Series as 366th Sudoku Puzzle in this Series. Can you solve this medium-level Sudoku puzzle?

Rules of Windoku

Standard Sudoku Rules apply. Additionally, four extra shaded regions contain the digits 1 through 9.

Windoku (Fun With Sudoku #366)

The answer to this Windoku puzzle can be viewed by clicking on the button. Please do give your best try to solve this Sudoku puzzle before looking at the answer.

This Windoku I am publishing as #366th Sudoku puzzle in the Fun With Sudoku Series. Here are the next and previous Sudoku puzzles published in this series.

The previous Sudoku Puzzle is Anti Knight Sudoku Puzzle (Fun With Sudoku #365)

The next Sudoku Puzzle is Anti-Diagonal Sudoku (Fun With Sudoku #1)