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Since there has been interesting strategy discussion on these puzzles and by popular request, I have opened an archive on the last thirty weeks. The discussion section is open for continued posting.
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@Klaus et al.: you have probably realized that we get bad weather arriving from the Atlantic!!--
Perhaps you have still somewhere in your locker a refreshing/nice extreme... to be released after that tiring Sunday-327!?!--
The whole community will grateful for your understanding and support!!--


No chain needed. All cols contain 3 so row E contains 3. Row E also contains 6 since E8-J8 is low. Hence no 8 in row E.


by: Goues

This didn't work for me, since there could have been 678 in E345 and 34 in E89 so I still needed the chain to show E345 wasn't 8.


by: Klaus

yes, me too thinks thats the chainy part...


by: mks

By some reason I also got a 2 in row E. Now I cannot recall the argument so there I probably made a lucky guess.


by: Christian

@mks: I can#t follow you.
Yes, E contains 3 (setti) and 6.
But E4 can still be 8 since E can be 3, satisfying setti.


by: mks

@Christian: yes, my argument is flawed


by: CL

Combined Setti arguments incl. 2,3,4,8 regarding row and col 7 help a bit, but did not lead me solving yet.

And there's a hidden triple in row J. Did not lead me further either.


by: pgw

My logic was - row E has to have one of 2 or 8 but not both, and all rows need 3; if you assume E4=8, it leads to a 6-cell UR in the lower left via x-wings. You can do this chain in your head but it's tricky.


by: Harm

My chain was to test whether G7 is 5. After this decision standard tolls lead to the solution.


by: Carol

The hidden triple in row J actually opens up the way to a quite short chain involving Setti 3 and 7 and a UR in the lower left, that solves J8 and thus hi/low in row E. After that it's only Setti 8 and a little x-wing that do the rest.


by: Cole

There is also a swordfish which reduces some candidates and solves C2...


by: Bansalsaab

I have solved the puzzle with the hints but i am running into some problem that i am not able to decode. Even with G7=1, i couldn't solve it 5 out of 6 times and ran into problems of impossible to solve. Only solved it once when i totally tried to avoid URs. Has anyone else seen any issue in this puzzle?


by: Klaus

Hi Bansalsaab,

sounds like your UR-reasoning has a flaw. maybe you can tell a bit more about it!?


by: Jan

Given the hidden triple in row J, I found it easiest to track the consequences of E4=8. For me this leads to three cells in row F being reduced to (24), which you can do in your head if you know exactly where you're going 8-). With setti 8 thus clarified, the consequences in column 7 (be it using setti or the 4-wing), setti 2 and some x-wings lead to the solution.

Assuming J8=1 leads to a setti 7 contradiction, quite straightforward but a bit harder to follow mentally. The (24) cells in row F are a recurring motif.

@Cole: I can't see your 3-wing.

For the UR in the lower left, you have to eliminate at least two candidates, either 95 in F12 or in H1J2. How do you do that in the various approaches outlined above?!


by: bansalsaab

Add to this thread
@Klaus unfortunately i have tried probably 4 more times and havent solved it. always run into duplicate candidates in a row or column. i am making some silly mistake which i am going to ignore now as there is a nice one more. :-)

Article created on 27-June-2010.
This page was last modified on 17-April-2011.
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  • 55 min, with held from the Discussion.
       - Drefplin - 2 hours ago
  • 58' nice one, the 8s are the key
       - hrw - 6 hours ago
  • 90 min
       - Kurt - 1 day ago
  • 40 min.
       - Katjulik - 1 day ago
  • I started with an unlucky guess on "8" or "no 8"; but afterwards it was easy
       - un - 2 days ago
  • 30 min - needed a chain
       - Loser - 2 days ago
  • about an hour.Although chains needed,I enjoyed this one.
       - mparmen - 2 days ago
  • 30 minutes, one long-but-obvious chain needed
       - Goues - 2 days ago
  • One chain on the 8 in row E.
       - jgrab - 2 days ago
  • 24 '; starting with a lucky guess it's mostly Setti
       - Candiru - 2 days ago
  • 45' with a guess on 8 or not
       - ThomasF - 2 days ago
  • 20 min - very nice
       - ghw - 2 days ago
  • 1 hour - needed one chain
       - Harm - 2 days ago
  • 2 hours of frustration
       - pet - 2 days ago
  • 45 min - needed a chain to decide whether or not a 8 is missing
       - Rafael - 2 days ago
  • 42' - settis and chains
       - witch - 2 days ago