Blackadder
(Published on 30. May 2022, 12:14 by udukos)
Normal sudoku rules apply.
1. The cells with a clue in the top left corner represent one end of a snake. Each clue belongs to a different snake.
2. The value of the clue gives the sum of all the digits that lie on a snake. These snakes behave as region sum lines. As a snake passes through different 3 x 3 boxes, digits on the snake have an equal sum N within each box it passes through. If the snake passes through the same box more than once, then each individual segment within that box sums to N separately. The snake must pass through at least two 3 x 3 boxes. If '?' is given as a clue, then its value has to be deduced.
3. The snakes can't touch themselves orthogonally or diagonally.
4. Two snakes can't share a cell together.
Here is a 6x6 example for illustration, with a link for solving online:
Links to the main puzzle: CTC, Penpa plus or F-puzzles
Have fun!
Solution code: Row 8 Column 8
Comments
on 17. September 2022, 00:31 by Niverio
What a beautiful puzzle!
on 5. June 2022, 18:20 by Snookerfan
Great puzzle! A lot of new (for me at least) logical principles discovered by means of this ruleset, very fascinating!
on 3. June 2022, 22:22 by udukos
Thanks a lot, KNT and Jay Dyer! :)
on 31. May 2022, 21:18 by Jay Dyer
Great puzzle! The break-in was fascinating, and the challenge kept up all the way to the end.
on 31. May 2022, 18:42 by KNT
Amazing! Thanks udukos :)
on 31. May 2022, 09:00 by udukos
Thank you so much for the wonderful feedback, Jesper, twobear and kolot! I am glad the puzzle was to your liking.
on 31. May 2022, 06:43 by kolot
Lovely puzzle!
on 31. May 2022, 02:46 by twobear
Wow, what an amazing puzzle! Very hard and very rewarding. The clues worked together perfectly. Thank you!
on 30. May 2022, 21:26 by Jesper
An awesome puzzle! Thanks, udukos
on 30. May 2022, 17:02 by udukos
Thanks a lot for the nice comments, Vebby and Tilberg! I am glad you both enjoyed the puzzle.
on 30. May 2022, 17:00 by udukos
Updated all the links with the added rules. Thanks Vebby
on 30. May 2022, 16:15 by Tilberg
Oooh boy. Box 8 was my favourite, beside the break-in.
on 30. May 2022, 15:35 by Vebby
Fantastic puzzle! Loved the rule-set. Thanks udukos! :)
on 30. May 2022, 15:28 by udukos
Added rules to the description. Thank you Dandelo and Kolot.
on 30. May 2022, 14:48 by kolot
It is also not said in the rules that the snakes must pass through at least two boxes (otherwise ? clues could be a single cell snake). I think this should also be clarified.
on 30. May 2022, 14:33 by Dandelo
In the example it seems that two snakes can't share a square. But it isn't said in the rules.
