Puzzle No 141: Untouchable Mystery Sandwich Sudoku

Here is tricky challenging sudoku.

Rules - Classic Sudoku Rules.

Inspired from recent Richard Stolk Post (https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0003QI).

Thanks to Prasanna and Ashish for test solving it.

LMD link - https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0003ZR

Online Solving - https://git.io/JJgUJ

Rules:

1) Classic rules apply.

2) Two same digits do not touch each other diagonally.

3) Additionally, the outside number is the sum of the digits between X and Y. X and Y to be found by the solver. X and Y remain the same throughout the grid.

Difficulty: Hard

Puzzle:

Puzzle No 140: Classic Sudoku

Classic sudoku after a long time.

Bonus Feature - You can solve it online if you prefer.

Rules:

Place numbers in the grid such that each row, column, and 3*3 box contain the numbers 1-9. 

Difficulty: Medium

Puzzle:

Online Link: ClassicSudoku (Click on the "Number" option at the top to insert numbers. If you're solving on the phone, click on the "Panel" option to turn it on. It will then display numbers to select.)

Any queries please leave a comment or reach out to me.

Have Fun !!!