Normal sudoku rules apply.
A digit in a circle is the middle digit of a string of 3 digits in a straight line, going either horizontally or vertically. (Not diagonally.) The digit in the circle is the sum of the other two digits in the string. (A digit in a circle could be part of two such strings.)
All circles are not necessarily given.
A number outside the grid is the sum of all the digits between 1 and 9 in that row/column.
Example:
The puzzle:
solving online: f-puzzles:
Solution code: Row 8, left to right, no gaps between digits.
on 6. January 2022, 16:19 by marcmees
absolutely worth to browse through some "older" puzzles to find this gem. thanks.
PS: is there an explanation for the title?
[Thorsby]No.
on 3. December 2021, 19:17 by uvo_mod
Labels angepasst.
on 14. November 2021, 14:00 by SirWoezel
Enjoyed this one. Some very cool logic!
on 14. November 2021, 13:27 by Thorsby
Added rule I forgot
on 14. November 2021, 11:10 by SirWoezel
Looks like the clues outside the grid are sandwich clues… maybe add that to the rules?
[Thorsby]Whoops! Done. Thanks!