Today’s puzzle is by Glum Hippo. Will it make you happy? Try it here:
https://cracking-the-cryptic.web.app/sudoku/F7pHprq69M
Rules:
Normal sudoku rules apply. Normal killer sudoku rules apply (ie digits in cages must sum to the clue given in the top left corner of the cage; digits cannot repeat within a cage.)
Artwork for the Glum Hippo icon by the super-talented Miriam Martincic.
https://www.miriamdraws.com/
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Hi! We’re Simon Anthony and Mark Goodliffe, two of the UK’s most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We’re also “cryptic crossword” aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world’s best puzzles.
Thank you for watching!
Simon and Mark
source
01:01:08 Not bad for me. I'm still really slow at killers
Ufff, I've had to restart it 3 times because of mistakes.
3:20 It doesn't seem like Simon did the math here before he started trying out numbers (and he never made it explicit), and it's both simple and helpful to do so. The sum of the digits in the box (45, as usual) is 1 more than the total for the two cages (44). It follows that the digits in the three "free" (uncaged) cells sum to 1 more than the digit in the caged cell outside the box. (The general principle: Overlapping regions differ by the same amount as their non-overlapping parts.) Since that digit is at most 9, those 3 cells can total no more than 10. So, when we find that the digits in row 2 can't be lower than 3 & 6, we know that they must be exactly those, and the one in row 3 must be 1.
12:36 I followed about the same solution path up to this point, and then… whoops! I filled in the 3, 6, & 8 in the 24 cage and then, neglecting to note that the cage wasn't confined to box 6 (d-oh!), proceeded to delete the pencil-marked 3's in column 9 and put a 3 at the top of the column! I had the thing nearly "solved" before I encountered an inconsistency.
So cool
When I solely look at the desing and color layout – almost reminds me of another 4sided "german WW2" shape. Could be interesting to make something like that in WW2 outbreak/ending anniversary, though youtube yould probably killed it just by spotting it
Solved it with much help from the video.
This one took me more than 3 hours ๐
Ah man I'm really glad he called the pattern a windmil. My brain went somewhere a lot more….. antisemitic
Glad to see Simon follow the same path that I did but he finished it in one quarter of the time. Look forward to the cage sudoku release.
For some reason (… perhaps the narrow solution path) this one took me forever. like, altogether probably close to 2,5-3 hours in several goes across two days. Did it on my own tho! Proud of myself for resisting watching the video. :))
Pleased to have solved this – time irrelevant because of interruptions. I did look at Simon's solve when stuck, but only because I placed the 9 in box 7 but then decided that it might be elsewhere after all. I need to have the courage of my convictions! My solve was identical to his to that point ,(unique path?) but after that I never looked because it fell apart easily.
OMG I totally solved this but still got stuck. I came to see what I was missing and it turned out to be that the 8 couldn't go in the 14 cage. I literally had the other 3 numbers in the cage. I did ALL the clever stuff and then forgot to add the digits in a cage….. DOHHHHH
At least you do not have to do super crazy absurd algebra on 50+ rows and columns to conclude that a hextuple of cells has to be their maximum and minimum. The start and all of the logic thereafter is simple and easy to follow
"Stuck again!" …4 seconds later… "Ah!"
Simon: "I think I'm missing something very simple here" at 17:24
As the author I can tell you: you missed _nothing_… great solve! And thank you for featuring my puzzle!
The puzzle is on Logic Masters Germany here: https://logic-masters.de/Raetselportal/Eigene/bearbeiten.php under the title "Partial Killer: Windmรผhle"
My very favourite Sudoku puzzles are the 'Killer' variety so I for one can't wait for the release of your new App.
Hour and 40 to finish it, coulda gone worse.
I made that hard work and took a complete wrong turn that needed major, major deletion.
43 minutes though and I'm quite pleased. Still lots of good fun to do and a far cry from the killers in most magazines. With some of the killers here I don't even know how to begin to solve them.
Now to find out how I should have tackled it and how colouring in squares might have made it (marginally) easier.
I'm taking bets with my toy hippo on whether Simon says "bobbins" at any point.
And…… STUCK AGAIN
90 mins of brain wrecking thinking, but i got it
Placing the 9 in box seven gives you the 9s in box eight and nine as well (if you'd only follow through on the logic!!!)
Wow, another one successfully completed – 23m49s