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Archive
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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Discussion...
Latest threads are now at the top.
In addition, posts you have NOT read are in normal colors, older ones are in grey.
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by:hoke

 
is.gd/hoke_scorpius
The constellation, not the animal like Leren's Scorpio

 

by: hone

Add to this thread
 
Thanx, lot of wings and settis; no chain needed.

by:Leren

 


is.gd/370_Pisces


 

by: jgrab

 
 
Got lost in the mutual interdependencies of Settis; so finally needed one chain.

 

by: ghw

 
 
Thanks for the nice Puzzle, used mostly settis, no chain needed.

 

by: Christoph

 
 
Hi Leren,
I needed two short street interactions, the first one to clear hi/lo in col 3, the final one to clear hi/lo in G 567.
This seems to contradict your statement some days ago that you offer normally puzzles with max 1 head chain.
I liked it really. Thanks.

 

by: Harm

 
 
Thank you Leren. I liked this puzzle very much. No chatins, just Settis and CE

 

by: Harm

 
 
chains

 

by: Leren

 
 
My solution only required one 4 cell SI (head chain), so it is in line with my normal policy.

 

by: Ben

 
 
Like Christoph I used two SI's - but I think he meant col 4.

Initially I solved 22 cells using basic techniques along with some careful eliminations and Setti. A 4-cell SI (AC48) proves that C4 is not 9, and that allowed me to solve an additional 9 cells.

But like Christoph I needed a second SI to sollve row G and the puzzle.

 

by: Leren

 
 
I got to 25 solved cells using basics, Fish, Setti, and CE's, these being B37, C9, D3789, E378, F35, G2, H135789, J123458.

A 4 cell SI in GJ69 => G6 <> 3, which solves, using basics.



 

by: Christoph

 
 
Ben,
you are right, I meant col 4. Sorry about the TYPO.

 

by: Leren

 
 
@ Ben

I can get to 31 solved cells by manually removing 9 from C4 and using an SI to solve. However there is an earlier CE opportunity to remove 3 from BC4 which then only requires the final SI. I'm just wondering if this is the difference in our approaches.

 

by: Ben

 
 
Leren,

No, I had eliminated the 3's. I had missed a simple big gap, which helped me solve the additional 3 cells before any SI's.

So then we get to a choice of two SI's. I would argue that the SI in AC48 is simpler than the SI in GJ69. The former is a simple contradiction, but the later requires you to consider both alternatives for G9 to eliminate a digit.

So, the fact that GJ69 leads directly to a solution is a moot point, following the two-SI path is arguably a simpler path.

Of course there is no wrong path, giving the puzzle to multiple experienced solvers, some would see GJ69 first, some would see AC48 first, others would probably see another path.

 

by: Christoph

Add to this thread
 
OK, I got it. You are right, Leren.
After the first simple four cell SI, which defines hi/lo in col 4,
I have found now the key to solve it without any further SI.
It is a jf on 3, which solves it directly.
Excellent puzzle.


by:hone

 
The hare, chased by Orion the hunter:

is.gd/hone370_Lepus

 

by: Candiru

 
 
Quite a lottery of Wings... plus a little bit Setti.
Thanks for that one, hone !

 

by: Augenweide

 
 
A series of pairs in row G result in a large gap 18.
Enjoyed it, thank you!

 

by: jgrab

 
 
Settis and wings, as Candiru said. But not trivial; need concentration.

 

by: Christoph

 
 
In deed, I counted 7 xwings, besides the settis,
I liked it, hone. Thanks.

 

by: hp

Add to this thread
 
Very Nice Pattern hone Thanks
Whole Toolbox needed like the others, perfect Level of difficulty

by:Berny

 
May I come back please to Lerens scorpio last week:

@Hone and Christoph: I can't see the problem with row B hi/lo. From the very beginning G6 and G8 are limited to 67. So one of them must be 7 and therefore either ABC 6 or ABC 8 must contain 1234. So B6789 can only be low. I wouldn't even call that a headchain.

Or where is my mistake here?

 

by: hone

 
 
@Berny:
No mistake from you. This settles row B.
But that's not from the standard toolset whose methods are either intra line or overall distributions (settis, wings).

 

by: hoke

 
 
@Berny: How did you eliminate the 5 in G6 and G8 at the very beginning? I needed to include A23456 into the high/low consideration, it leaves only one number in A6, with the same consequences. I also assume, that's what Leren called the "sting of the scorpion" in the hint, although I am happy to never have met such an animal.

 

by: hone

 
 
@hoke: 67 is a hidden pair in G6 and G8

 

by: hoke

 
 
Thanks for opening my blind eyes.

 

by: Leren

Add to this thread
 
@ Hoke

My path to HI/LO in Row B was not as imaginative as Berny's observation. I used two 4 cell SI's, both in AB89. Together with some standard moves in the same area B8 was reduced to 1234.

by:Leren

 

is.gd/370_Leo

 

by: jgrab

 
 
Thanks, Leren. Leo solves almost only from Settis.

 

by: ThomasF

 
 
Tanks Leren, Settis do it

 

by: hp

Add to this thread
 
Ty Leren bca-festival

by:Leren

 
Hopefully Hone won't mind my taking his Ultra puzzle of Week 365 and playing with the clues a bit to make it solvable by us mere mortals.

is.gd/370_Hone_Clone


 

by: Leo

 
 
Still needed one guess to solve it

 

by: Tati

 
 
No guessing necessary, nice one!

 

by: jgrab

 
 
After I used a long chain, I found out that I probably didn't need it. B8=9 and C8=9 lead to the same situation on C2.

 

by: Ben

 
 
The easiest SI I found was seeing that BC6=12 eliminates both 9's in row 8.

 

by: Christoph

 
 
In my case I found that C6 low would directly result in four cells in col 1 consisting of 789 all of them.

 

by: hp

 
 
ty Leren, for me only solvable (besides a lot of Standard Tools) by using the hint (head chain) from this forum

 

by: Maven

Add to this thread
 
I spent nearly 2 hours on this one. Ouch!

by:Stefan

 

is.gd/stefan370

 

by: ThomasF

 
 
Thanks Stefan, nice pattern, standard tools

 

by: kolumbus

 
 
very nice one, thank you, Stefan!
I needed a little head chain to decide D123 low/high

 

by: milky joe

 
 
Phew, indeed "only" standard tools in the end, but it took me a very looong time. There were some sneaky x-wings... Very nice! Thanks!

 

by: jgrab

 
 
Very nice; x-wings and Settis do it.

 

by: hp

 
 
very nice thank you Stefan another masterpiece
perfect difficulty Level

 

by: Christoph

 
 
very nice, Stefan.
4 xwings, 1 swf, 3 settis.

 

by: KDN

Add to this thread
 
Thanks@Stefan
Very nice one, settis, x-wings, large gap and one big fish. No chain needed



Article created on 27-June-2010.
This page was last modified on 17-April-2011.
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  • 7 min: easy, just settis
       - JimKnopf - 12 hours ago
  • 21' really nice one
       - kerstin - 16 hours ago
  • 21' straightforward settis
       - martijn - 1 day ago
  • 23' simple logic, some settis (8, 7, 5)
       - joeB - 1 day ago
  • 2nd try with high/low on E6
       - chris - 2 days ago
  • 27' nice, not too easy, settis do it
       - juehe - 2 days ago
  • 38' in second try, very nice one
       - hrw - 3 days ago
  • 44 min not terribly fast compared to most of you but glad I was able to solve it.
       - Maise - 3 days ago
  • 35' but 2 solutions, D5 is 5 or 6
       - Mika - 3 days ago
  • 14 min - very nice, not very hard
       - Susan - 3 days ago
  • 16' on sec. attempt, no special tools needed
       - easydoesit - 3 days ago
  • 29 min, nice one, not too difficult
       - Boerny - 3 days ago
  • 24' easiest ever, although the solver has no solution
       - flowermount - 3 days ago
  • 19 min Used settis, but I confess I made an educated guess for E6, then everything just fell into place.
       - hildi - 3 days ago
  • 39:12, tough. but without any tricks
       - fred - 3 days ago
  • 23', Settis did the trick for me. Lovely. This is the level of difficulty I like.
       - Emma - 3 days ago
  • 23'15" no solver
       - Greg - 3 days ago
  • 58 min.
       - Maven - 4 days ago
  • about 20 min (had browser problems), nice one settis helped
       - schaaf - 4 days ago
  • 31 min, a bit easier than usual
       - ataraxia - 4 days ago
  • 8 min: very easy
       - JimKnopf - 4 days ago
  • 21 min, setty and swordfish
       - humptidumpti - 4 days ago
  • not too hard .. quite a nice one ..
       - Peter - 4 days ago
  • Several breaks, two attempts, but after all a nice one...
       - gpb - 4 days ago
  • 30' with settis
       - Lilli - 4 days ago
  • not extreme, but nice :-)
       - 28 min - 4 days ago
  • 11:29 - The solver did all the routine work at the beginning. After that, some settis and intensive "lokking for singles" did the job.
       - Korbinian Bär - 4 days ago
  • 20'. Very easy. Many settis.
       - innsteg - 4 days ago
  • 20 min -great puzzle mister puzzled one
       - effchen - 4 days ago
  • not too hard. Settis, x-wings, singles.nice.
       - A B Traherne - 4 days ago