CTC Snake Sum Sudoku
(Published on 22. September 2020, 04:00 by Quarterthru)
CTC Snake Sum Sudoku
Here is the Snake Sum puzzle I made specifically for CTC.
Normal sudoku rules apply except that the regions are irregular.
Additionally, a snake has to be drawn into the grid. The head and tail of the snake are in the two cells with the grey circles. The snake may not touch itself orthogonally, but it can touch itself diagonally.
The clues outside the grid indicate the sum of the digits located on the snake in the corresponding row/column. Considering "Snake" and "non-snake" as two colors, the given digits show how many cells orthogonally connected to the given are of a different color to the color of the given cell itself. All such possible digits are shown. NOTE: Digits placed by the solver CANNOT be true or they would have been given
Givens can be on or off the snake.
Here is a link to play the puzzle on the CTC Web App
Solution code: Row 2 + Column 6
Comments
on 23. September 2020, 16:13 by Quarterthru
@henrypijames Just give it a couple of weeks to forget what you saw, it may not be a completely raw solve, but you'll still have to work it through.
on 23. September 2020, 16:09 by Quarterthru
@polar Thank you. I have a #7 just waiting...
on 23. September 2020, 10:35 by polar
Quarterthru - this series has been a delight! Thank you so much. I do hope more people will persevere with the others in the series after Mark's video yesterday :) Took me a few goes to get my head around the first one but after that they all clicked and were sublime.
on 23. September 2020, 09:28 by henrypijames
Come on! Why didn't you post the puzzle before it's featured on CTC? I couldn't help but watch the video, and now I can't solve it myself anymore…
Mark's solve was quite impressive, given he's new to this ruleset. He nevertheless did all the things more or less in the right order, and very quickly too.
