Sandwich Sudoku
In sandwich sudoku, the numbers along the edges of rows and columns show the sum of the digits "sandwiched" between the 1 and the 9 in that row or column.
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Sandwich Sudoku rules
- 1Rule 1
The classic row, column, and 3x3 box rules apply as usual.
- 2Rule 2
The number to the left of each row, and above each column, is a clue.
- 3Rule 3
It's the sum of the digits that fall between the 1 and the 9 in that row/column.
- 4Rule 4
The 1 and 9 themselves aren't included in the sum — only what's between them.
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