Logic Masters Deutschland e.V.

The universe is in trouble again and the Doctor needs your help. Will you be a worthy companion?

I will let him explain:

“Space is complicated full of wibbly wobbly timey wimey stuff."

So, let’s start simple.

Normal Sudoku Rules apply, place the digits 1-9 in each row, column, and box, EXCEPT one of the 5’s has been erased and replaced with a 0 due to the Flux. I can’t tell you which one, ‘spoilers’. (To be clear, to complete the puzzle you will place a 0 in a single cell as part of the solution.)

Killer Cages: digits in each cage add up to the total in the corner. Be careful ‘don’t think’.

The bit more complicated:

Thermometers: digits along a thermometer strictly increase OR decrease in value. Remember ‘don’t breathe’.

Now the really hard part:

The TARDIS needs to fly from the blue square to the other blue square through an orthogonally connected loop that does not touch itself even diagonally. Whatever you do ‘don’t blink’.

Digits on this path have negative values for all clues AND are only odd digits. This is important ‘don’t forget’.

But let’s have some fun too, it’s only the universe at stake!

River Song has left us an encoded message to encourage us! This message is “Hello Sweetie”, to decode it, you must rearrange all the letters of both words alphabetically and then assign them a number in order starting with 1. Each letter is represented by a number. Then these numbers act as a cipher to find the hidden message embedded within the puzzle. However, “Hello” has been erased and only “Sweetie" remains, it is found in a straight diagonal line in the puzzle and reads left to right. ‘Run you clever boy’!

Geronimo!!”

P.S. If you are having trouble with the cipher look at the comments below, and I will provide the key.

Solve on CTC