Logic Masters Deutschland e.V.

This is my second puzzle with the Strandwich ruleset. The idea is that two strands have to be drawn into the grid and outside clues indicate the sum of the digits sandwiched between the strands. This time, the strands carry the Entropic line constraint. For more detailed rules see below.

This puzzle has been motivated by an encouraging comment of Calvinball. I also like to thank MattDdraig and Henry ‘Pi’ James for testing. As always, your feedback in the comments is much appreciated. I wish you joyful solving!

- Normal sudoku rules apply, i.e. each row, column and 3x3 region has to contain the digits from 1 to 9 once each.

- Quadruple: Digits in a circle must appear in the four surrounding cells.

- Strandwich clues: Draw two strands into the grid that connect Row 1 and Row 9. A strand is a continuous one-cell wide path that moves from cell to cell diagonally or vertically, but never moves horizontally.

Both strands must be Entropy lines. i.e. every set of three adjacent digits along the line must contain a low (1, 2, 3), a medium (4, 5, 6) and a high digit (7, 8, 9).

The two strands must intersect each row in exactly one cell. Clues outside the grid are so-called Strandwich clues, i.e. Sandwich clues with respect to the strand cells. A outside clue on the left indicates the sum of all digits between the two strand cells in the respective row. Any column with an outside clue on top of it must contain precisely two strand cells and the clue indicates the sum of all digits between these two cells.

Here you can solve the puzzle online:

Solve on CtC