Logic Masters Deutschland e.V.

Knapp Daneben Twin Killer Sudoku

(Published on 24. April 2009, 10:56 by Richard)

Place the digits from 1 to 9 in every row, column and 3x3-block.

The numbers in the grid are the sum of the digits in the smaller outlined areas. In the smaller areas digits may not repeat. Both grids have the same solution. The center cell does not belong to a cage sum.

Note: All given sums are wrong. The correct sum is either 1 higher or 1 lower.

Solve online in Penpa+ (thx Nick Smirnov!)

Solution code: Column 1

Last changed on on 15. October 2022, 05:58

Solved by Calavera, pwahs, bergelfe, lupo, Hauskatze, ibag, uvo, Rollo, SilBer, r45, Statistica, Luigi, ffricke, Mody, pin7guin, saskia-daniela, RobertBe, Rollie, uko50, annusia, Javier Rebottaro, Realshaggy, ... pirx, skypper, dm_litv, gsabanci, pandiani42, Hasenvogel, Julianl, Circleconstant314, misko, CJK, polar, EKBM, Nick Smirnov, sinchai4547, PixelPlucker, dumediat, damasosos92, Myxo, Playmaker6174
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Comments

on 15. October 2022, 05:58 by Richard
Added link and tag for online solving. Thx Nick!

on 10. October 2022, 13:39 by Nick Smirnov
Penpa:
https://tinyurl.com/2jc5qhgf

on 15. August 2021, 14:03 by uvo_mod
Label ergänzt.

on 31. December 2014, 08:39 by skypper
Das Rätsel hat mich an meine Grenzen gebracht.
Es ist trotzdem gut zu lösen, wenn man(n) es dann gelöst hat :-)

Ich wünsche allen einen guten Rutsch ins Jahr 2015 und bedanke mich für viele rätselhafte Momente in 2014

Willi

on 5. January 2013, 08:12 by Oliver Strauß
Thank you Richard for this very hard nut. But I did it now after more than one year and uncountable trials. It's completely solvable by using logical ways...

on 3. September 2012, 03:08 by Ours brun
Finally solved it after a bad first try. Wonderful puzzle, really tough but fully logically solvable indeed. I like that!

Last changed on 10. January 2010, 07:20

on 10. January 2010, 07:10 by Richard
@Rimodech: Congratulations! And: there is a fresh one waiting for you... Also completely logical solvable. ;-)

on 9. January 2010, 21:49 by rimodech
aaaaaaaaand... yessss!!! :)

on 20. September 2009, 20:35 by jirk
Very nice, I think that this is the hardest puzzle I have solved here so far.

Last changed on 2. August 2009, 08:38

on 2. August 2009, 08:34 by Alex
ha, geknackt! Toll verwirrend! Jetzt fehlt mir nur noch der ominoese Twin3 (arrrgggghhh!!!)
and yep, the starting point I found was nice and complex and the whole puzzle very logical!

on 2. July 2009, 20:44 by Le Ahcim
Oh Mama...

on 4. June 2009, 09:41 by AnnaTh
War viel Schokolade nötig, um das Rätsel endlich zu knacken.
Ich gebe diesem Rätsel 10 von 5 möglichen Sternen!!!

on 28. May 2009, 20:31 by flaemmchen
Nun hab ich's doch ohne Hinweis geschaftt!! *freu*

on 28. May 2009, 01:02 by sf2l
The starting point was not too difficult to find, the problems begin when you make a wrong assumption.... i lost days insisting in the same mistake....but eventually i got there.
TYhank you Richard for a very challenging puzzle

on 27. May 2009, 09:59 by Richard
I am now busy finalizing a 'Twin Killer Sudoku für anfänger'. It contains the same (general) hint as a gave to Realshaggy. A few days patience...

on 27. May 2009, 09:25 by flaemmchen
So ein klitzekleiner Hinweis würde mir auch gut gefallen ... ;-)

on 27. May 2009, 03:46 by Realshaggy
Finally! Richard gave me a (very small) hint. Very hard without knowing the starting point, medium if you finally found it.

on 7. May 2009, 18:27 by RobertBe
Finally! And completely solvable without making assumptions; very nice!

on 29. April 2009, 20:46 by Luigi
Für mich ein mörderisches Rätsel. Am Ende des Tages ein wahres Erfolgserlebnis.

on 29. April 2009, 09:23 by Statistica
Very hard... But I liked it :-)

on 24. April 2009, 22:32 by Calavera
Took me three trials this time. Started in the "wrong" corner first and then got the "right" corner wrong when trying again ;-).

Difficulty:5
Rating:94 %
Solved:75 times
Observed:18 times
ID:00001U

Puzzle variant Online solving tool Multi-grid puzzle Knapp daneben

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