Author: 真笑(洪卫华), from China, this question comes from his personal blog.
This is a new variant of Sandwich Sudoku. It is created using the variable order of the sandwich numbers. It is also the fifth question of the series. There may be more interesting combinations of variants later.
69Sandwiches(5)--Nonconsecutive Double Sandwich 1.Standard Sudoku:The classic Sudoku rules apply; 2.Nonconsecutive Sudoku:Orthogonally adjacent cells cannot contain consecutive digits; 3.If X appears in front of Y, the sum of all the numbers between X and Y is marked on the outside (left or upper black); 4.If M appears in front of N, the sum of all the numbers between M and N is marked on the outside (left or upper gray); 5.The 4 letters MNXY represent 4 numbers, and the numbers may be repeated; 6.All qualified external prompt numbers have been marked.
Solution code: Row 5,Coloum 5.(A total of 18 numbers).
on 9. July 2021, 12:25 by cdwg2000
@Mody
I am glad you like it.
on 6. July 2021, 12:18 by Mody
Das hat Spaß gemacht. It was really funny.
on 2. March 2021, 07:45 by cdwg2000
Repaired rules.