A Tribute to Al Jaffee
(Published on 22. October 2024, 19:00 by Gnubeutel)
Rules
Normal Sudoku rules apply. Place the digits 1-9 in every row, column and box exactly once.Kropki dots: cells separated by a black dot are in a 1:2 ratio, cells separated by a white dot are consecutive. Not all possible dots are given.
Killer Cages: digits in cages may not repeat and sum to the total in the top left corner.
Fold-In: The dashed red lines are folded onto each other so that column 1, 2, 8 and 9 form a secondary grid. In this grid all rules apply, except that regions and rows do not need to have all of the digits for obvious reasons (it's a 4x9 grid).
E.g. the renban in the example image in r7c1 and r8c2 will also form a renban with r7c8 and r8c9.
Example
Here's an example how the 4x9 grid is formed. Thanks to Flinty for the design.
Puzzle
Play online with sudokupad.
Solution code: Digits in the fifth column from top to bottom.
Comments
on 3. February 2025, 03:36 by Frank Puzzles
https://youtu.be/L-TWh-27Ytw
Here's my solve of your puzzle. Unfortunately, I forgot to plug in my microphone, so the audio is pretty soft. Still, I enjoyed the puzzle and logic with the folding sudoku!
on 6. December 2024, 14:41 by ThymePass
It took me a while to wrap my head around this, but this was an excellent puzzle. And thanks for the link to the fold-ins page - some LOL ideas in there coupled with the history.
on 26. October 2024, 00:16 by Snaques
These are always bit of mind benders, but love them nevertheless.
Related to those rules that could have a dual nature, a thermo could also turn into a palindrome line when folded.
Can't wait to see what comes out next from you. ;)
on 23. October 2024, 21:20 by gdc
Very fun and creative idea with a nice execution. I wonder if there are more constraints to use with this. Arrows with between lines might be fun.
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Reply by Gnubeutel:
Ooh, how about a between line - that turns into an arrow by folding? I. e. a change of rules because the iconography is the same.
on 23. October 2024, 06:54 by Archon
Love it. Made perfect sense to me, but maybe that's because the Fold-In was always my second stop with any new issue of Mad (after Spy vs. Spy :). Think I'll pull my copy of Fold This Book off my shelves and have another read.
on 23. October 2024, 03:45 by AFVeit
Fantastic puzzle! I'm still building my way up to 2 star puzzles and yours was a fantastic challenge for me!
on 23. October 2024, 02:05 by rictech
Unique rule set that made for some great deductions. Nice tribute as well. Thanks!
on 23. October 2024, 00:51 by dingledork
That broke my brain, but I loved it! Thanks!
on 22. October 2024, 21:47 by Flinty
Wonderful idea for a puzzle, and very well made. Thanks.
on 22. October 2024, 20:07 by cg24
nice ruleset! i liked it :)
