Logic Masters Deutschland e.V.

Puzzle No. 11 in the Double Trouble series is one of my favorites from the series so far. It brings back the aspect of hidden doubling cells that must be found by the solver. In this case in the form of a loop, which must be drawn in the grid.

Feel free to try the other puzzles in the series (now with CTC app links). There is a lot to discover. You will find links to the puzzles below this puzzle

Rules:

Sudoku: Fill every row, column and 3x3 box with the digits 1-9.

Killer: In cages digits must not be repeated and have to add up to the total given in the top left corner of a cage.

Double Trouble Loop: Draw an one cell wide loop of orthogonal connected cells in the grid. The loop may not touch itself orthogonally or diagonally and it cannot branch. Cells on the loop are Double Trouble cells, i.e. contribute their double value to the cage total.

Have fun solving!

Sudoku on:
f-puzzles
CTC-App

The Double Trouble series:
In this series I show puzzles in which, for some cells, the double value of the digit for is considered for the rule variant(s).
The following puzzles have been published so far and show a great variety, with something for everyone.

Doubletime (Difficulty: 1/5, Killer, Easy start in the series)
Double Trouble - Thermo (Difficulty: 2/5, Thermo)
Double Trouble - Arrows (Difficulty: 2/5, Arrow)
Double Trouble - XV (Difficulty: 2/5, extended XV)
Double Trouble - Killer (Difficulty: 3/5, Killer)
Double Trouble - Skyscraper (Difficulty: 3/5, Skyscraper) needs a rating
The Diamonds Will Do It (Difficulty: 3/5, Arrow, Double Trouble cells as symmetry breaker) needs a rating
Wrecking Ball (Difficulty: 4/5, Killer, shows a trick with Double Trouble cells) needs a rating
Double Trouble Celebration (Difficulty: 4/5, Mash-up of all 5 variants, a lot of interesting interaction) needs a rating
Doubles Hidden Inside Squares (Difficulty: 4/5, Killer, Hidden Double Trouble cells) needs a rating

I look forward to any feedback and suggestions about the series.