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 second question of the series. There may be more interesting combinations of variants later.
The latest question:
69Sandwich Sudoku--Double Sandwich
1. Classic Sudoku rules apply;
2. If the number 1 appears in front of the number 9, the sum of all the numbers between them is marked on the outside (left or upper black);
3. If the number 2 appears in front of the number 8, the sum of all the numbers between them is marked on the outside (left or upper gray).
Lösungscode: Row 9,Coloum 5.(A total of 18 numbers).
am 20. Februar 2021, 23:28 Uhr von cdwg2000
Glad you like this idea! Restricting the order of the number of sandwiches can reduce the difficulty of the question. Correspondingly, some combined variants will be derived. This is the second question in the series. There may be two different interesting variants later. I will introduce them later.
am 20. Februar 2021, 18:06 Uhr von Dandelo
Very good idea, and a very nice puzzle.