Klein aber Fies: Jigsaw Killer
(Published on 5. March 2010, 12:00 by Richard)
After the comments of Flaemmchen to my previous 7x7-sudoku I was curious about how hard a 7x7-sudoku could get, and still be solvable in a logic way. This is a result.
Hint: the puzzle is best solved with the elimination-technique. Write all possiblities in every cell, and eliminate slowly the digits that are not possible. Law of leftovers, cage-sum-combinations and innies/outies are the only required techniques. No T&E is necessary! ;-)
Solution code: Zeile 2, gefolgt von Spalte 6.
Comments
on 9. January 2024, 19:54 by damasosos92
Oh my. Brutal puzzle. THAT was a puzzle.
on 31. January 2023, 18:45 by Nick Smirnov
Penpa:
https://tinyurl.com/2ka9sdqc
Brilliant puzzle! I solved it without any T&E but, oh boy, it was tricky to find these crucial steps.
on 25. March 2017, 22:40 by skypper
Kaum zu glauben, dass es so schwer sein kann 49 Zahlen zu sortieren. Und es waren sogar nur 7 verschiedene :-)
on 7. June 2010, 20:09 by Saskia
@ffricke: 22 gelöste Rätsel an einem Tag im Minutentakt - da hat aber jemand am Wochenende in der Sonne gebrütet ;-)
on 17. March 2010, 10:05 by flaemmchen
Das war oberfies ... ;-)))
on 10. March 2010, 16:57 by Realshaggy
Yeah! I found the first number (without T&E)!
I hope it's getting a little bit easier from now on. It's a pity I don't have time for solving puzzles at the moment, but this one is a must.
Edit: Cool, a very slow start, but suddenly it falls apart.
on 10. March 2010, 10:25 by Richard
@Saskia: do you have an account in the forum? I have a question for you.
on 9. March 2010, 11:05 by Eisbär
This was mean... very mean...
Just like Zafer I needed lots of T&E to solve this...
on 5. March 2010, 22:17 by Alex
@Javier: check both middle areas for duplicate numbers and you will be there! You only need to switch 2 pairs.
on 5. March 2010, 16:22 by zhergan
A nice design to show how small grids may become tough. Thanks Richard:)
ps: Even if Richard stated no T&E is needed I used it at some steps. Most probably I didn't see some properties.
Zafer
on 5. March 2010, 15:10 by flaemmchen
Was hab' ich denn da losgetreten ;))
Ich mag keine "fiesen" Rätsel ... nur "nette" :))
on 5. March 2010, 13:01 by Richard
Ahum!
Indeed, I made a mistake, but now it's correct. That's what happens if you are not careful enough...
on 5. March 2010, 12:37 by Luigi
Irgendwas stimmt hier nicht, Richard. Das Rätsel kommt mir doch sehr bekannt vor; ist es nicht das selbe wie der andere kleine feine?
Hätte ja gerne den gleichen Lösungscode hier genutzt; wird aber nicht akzeptiert.... Schade ;-)
