Logic Masters Deutschland e.V.

I had this idea few months ago, but I had to think about it a bit before attempting to implement this fun ruleset. I call it ...


I knew it would be a somewhat difficult puzzle. It's actually solvable with a few more of the sandwich clues removed, but I didn't want it to be TOOOO hard to get through. Let me know what you think!

Normal Sudoku Rules Apply
- Numbers in the upper left corner is the sum of the digits in the cage, digits can not repeat within a cage.
- Black dots show pairs of boxes where the value in one is double the other, white dots show boxes where one value is consecutive to the other - not all dots are shown.
- Ignore the Sandwich clues.

But Wait! Once you fill in the digit '7' in all nine boxes ...
- Delete all digits in the grid except for 7, 8, and 9's and delete all your pencil marks.

Continue with the following rules:
- Numbers outside the grid indicate the sum of the digits between 1 and 9 in their respective rows and columns.
- Black dots show pairs of boxes where the value in one is double the other, white dots show boxes where one value is consecutive to the other - not all dots are shown.
- Ignore the Killer Cages.





Solve Online here:
The Old Switcheroo! (F-Puzzles)

(Hint - if you can find a few more 8's and 9's in the first part, it makes the second part easier. But the puzzle still solves either way.)

Puzzle by David Workman (aka "HalfBakedLunatic")