I created this puzzle as a gift to my favorite setter, you guessed him right ‘Qodec’, to celebrate his birthday. As you will see from the puzzle, his birthday is not today but did not want to publish the puzzle until he enjoys his gift first, and make sure he liked it. Now, after confirming he is okay with the idea of posting it, I decided to share it with all of you so that you can enjoy solving it too.
Special thanks to @PixelPlucker and @bakpao for testing the puzzle and for their feedback.
Puzzle Rules
Normal Sudoku rules apply.
Little Killer rules apply. Numbers along the indicated diagonal must sum to the given total, numbers can repeat along these diagonals.
Sandwich rules apply. the numbers outside the grid (above columns 3 and 9, and beside rows 2 and 8) indicate the sum of the digits sandwiched between the 1 and 9 on that row or column.
Arrow rules apply. Digits on arrows must sum to the digit in the circle.
Killer rules apply. Digits in marked cages must not repeat and must sum to the total in the top left corner.
The diamond in r5c5 contains the average (arithmetic mean) of its orthogonal neighbors.
Note: Little killer clues do not serve as sandwich clues, meaning that they only sum the digits along their diagonal. Enjoy!
Solution code: Column 3 Row 8 (18 digits, no spaces or commas)
on 22. October 2021, 14:03 by uvo_mod
Labels angepasst.
on 20. June 2021, 22:15 by Vebby
Very nice gift! :)
on 12. June 2021, 19:41 by Tom1i
Thank you, that was fun! HBD Qodec.
on 12. June 2021, 06:31 by e7odie
....well now I'm inspired to make a puzzle where clues outside the grid function as BOTH little killers and sandwich clues. To your knowledge, are there any puzzles like that to test first?
on 12. June 2021, 01:43 by DiMono
This one took me a while, but that's my fault for focusing on the wrong clue for so long. Wonderful puzzle, with a smooth solve path if you're not stubborn like me :D
on 11. June 2021, 21:48 by RootsInWermland
Lovely construction, really nice puzzle with a very fine balance between being tricky but also rewarding when you find the next step!
on 11. June 2021, 21:16 by Playmaker6174
Very nice and meaningful present to one of the best setters I've ever known, happy birthday Qodec :)
(also miss the opportunity to make the code col 6 row 8 xD)
on 11. June 2021, 19:14 by Ragna
Very fine birthday puzzle!
on 11. June 2021, 17:58 by Kafkapharnaum
Fun one, very elegant! And HBD Qodec!
on 11. June 2021, 17:32 by abed hawila
note
on 11. June 2021, 17:31 by abed hawila
Added a clarification note about sandwich and LK.
on 11. June 2021, 17:10 by SKORP17
es wäre nett, den Hinweis zu geben, dass die LK Summen nicht gleichzeitig als Sandwich gelten
on 11. June 2021, 17:03 by Crystal Phoenix
Easy but fun puzzle! Also, happy birthday, Qodec!
on 11. June 2021, 16:29 by Qodec
First time I got a diamond for my birthday! Totally worth it, thanks very much!