Fortress Sudoku Puzzle (Fun With Sudoku #313)

It is long back, I created the Fortress Sudoku puzzle. The last time I created a Fortress Sudoku puzzle was for Sudoku Mahabharat Episode 6, which however was not published in that Sudoku competition and was published here on this Fun With Puzzles website with the title "Fortress Sudoku (Daily Sudoku League #96)". Now Fortress Sudoku puzzle was appearing in the 4th Round of the Sudoku Grand Prix (GP), so I created Fortress Sudoku so that readers of this website can practice for this Sudoku competition. This Fortress Sudoku is a medium-level Sudoku that I am publishing as part of the Fun With Sudoku Series as the 313th Sudoku Puzzle in this Series.

Rules of Fortress Sudoku Puzzle

Standard Sudoku Rules apply. Additionally, a digit in a shaded cell must be higher than digits in all orthogonal adjacent white cells.

Fortress Sudoku Puzzle (Fun With Sudoku #313)

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

This Fortress Sudoku Puzzle I am publishing as the #313th 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 Inner Frame Sudoku Puzzle (Fun With Sudoku #312)

The next Sudoku Puzzle is Thermometer Sudoku Puzzle (Fun With Sudoku #314)