Secrets and Lines
(Published on 2. November 2021, 19:23 by starwarigami)
- Digits along a Renban line form a set of consecutive digits in any order.
- Consecutive digits along a German Whispers line differ by at least 5.
- Digits along an Anti-Factor line of length n may not be any multiple or factor of n other than 1, and must sum to a multiple of n.
ctc link
Solution code: Column 8 (top to bottom) Column 9 (top to bottom) - 18 digits, no spaces
Comments
on 11. October 2023, 19:26 by rich_27
Awesome puzzle, thanks! Very cool mechanic and I really enjoyed the fluff you wrote!
I thought I'd weight in on Prof.Dori and Ragna's discussion below: I did the puzzle today having seen it on CTC, and rated it "Very Difficult" and "Nice" respectively. I rated it that because whilst I really liked the puzzle and enjoyed solving it, some of the logic was not intuitive to me and I found required holding a lot of maths in my head whilst calculating antifactor remainder sums, which made some bits of the solve a little frustrating to me. I really enjoyed the puzzle, but not quite as much as I have enjoyed other puzzles with logic that isn't quite so numerical.
I don't know if rating it based off my enjoyment of the puzzle or the beauty of its construction (for me, probably around a 50:50 split) is the intended usage of the rating system, but it seems like that might be the case given the presentation of the rating dialogue.
Doing a quick bit of maths, with a puzzle having been solved around 50 times and assuming "very nice", "nice", etc. correspond to ratings of 100%, 80%, etc., each person that rates it "nice" would reduce a prior 100% rating by around 0.4%. A person rating it 0% would reduce it almost 2%, and hence it seems likely that the decrease in rating might be due to people rating it "nice" rather than someone coming and giving it 0%.
I guess it's a question of what is more important, a puzzle being seen by a far wider audience or a puzzle maintaining a flawless rating. I think it's natural that more people would bring a slightly wider breadth of opinion.
I know finding out about puzzles like this has brought me quite a lot of joy, which would never have happened if not for CTC.
on 11. October 2023, 04:21 by Ragna
What a wonderful puzzle! Very clever setting. Thank you for sharing. :-))
I agree totally with Prof.Dori!
This "well known solver" always reduces nearly all good puzzles with his toxic sting. That is not fair!
There must be any action from LMG to stop this horrible guy!
Please, LMG, proove how to get him out here!
on 21. September 2023, 00:15 by Prof.Dori
This had 100% rating before it getting featured on CTC video. It is ridiculous that some persons especially one of those which is well known to do such things as rating 0% for absolute no reason. I think definitely someone has to take some action in regard to this part because is not fair to anyone.
on 10. April 2022, 03:14 by OGRussHood
Not a day goes by where I'm not amazed at the world of sudoku. I can never stop myself from asking on puzzles like this, "How can this have a logical and unique solution?!" Then I actually work through that puzzle and blow my own mind in the process.
on 6. April 2022, 11:17 by kolot
Lovely puzzle! It looks scary at the beginning but once you start solving, it is not too hard at all. I enjoyed it a lot.
on 27. March 2022, 22:59 by zetamath
This is a fantastic ambiguity puzzle!
on 27. March 2022, 22:57 by starwarigami
Reduced darkness of redaction lines to improve visibility of pencil marking in CtC app
on 3. November 2021, 18:24 by marcmees
very nice one. thanks.
on 3. November 2021, 09:19 by Elliott810
Fantastic puzzle! Can't believe that one can come up with something like this. Take a bow and thx for sharing:)
