Dr. Sudoku Prescribes #115 – Cross the Streams

Cross The Streams by Thomas Snyder

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Rise and Fall

Rules: Standard Cross the Streams rules.

Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.

Time Standards (highlight to view): Grandmaster = 6:00, Master = 10:30, Expert = 21:00

Solution: PDF

  • chaotic_iak says:

    04:40 WHEE

    A wonderful puzzle. Although it feels like bruteforcing is necessary? I used bruteforce to resolve rows 2 and 9; the rest aren’t too much bruteforce although the solving path is tight.

    The puzzle is also aesthetically pleasing. The row clues have a neat pattern with a bunch of question marks, while the column clues have asterisks everywhere except a nice wavy pattern of numbers.

    • As far as I see, thats not required, there’s a deduction in the bottom rows using row 8, row 9 and the columns. I solved it using that and it flowed quite nicely.

      • Avatar photo drsudoku says:

        This is indeed closest to my intent. There must be three “escapes” from the bottom of the grid that pass through the 8th row. That limits the row 9 options to one.

  • Scott Handelman says:

    8:54. I’ll take it.

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