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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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by:Ø

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A short SI: If AB9 and A89=8/9 then A6=7, B6=8, B9=9, reducing A8 to 5/9 wich is a large gap, eliminates 5 from B8 and leaves a single 5 in B2.

by:hoke

 
is.gd/hoke452
Although I need a chain towards the end, I like this puzzle. And maybe, the community will again find a better solution than mine.

 

by: c

 
 
my first apprach: an easy chain to define G3 at the beginning and a UR.
I shall try again later.

 

by: Harm

 
 
@c: G3 can be solved via Setti.

 

by: Christoph

 
 
the post of 04:10 was mine. Sorry.
I had a new trial:
The only possibility to avoid a UR in E9 is A9= x and B9 = y.
This solves this nice puzzle with two x-wings. No chain.

 

by: Tati

 
 
Nice puzzle, no chain needed. (UR, setti, wings.) Thanks!

 

by: Ben

 
 
@Christoph,

I wasn't able to solve AB9 to avoid a UR.

I could narrow E9 to 1 or 9 - I eliminated the 2 by reducing HJ9 to 123.
But I am still left with two alternatives:
- if AB9=89 - it would be 1
- if HJ9=12 - it would be 9

I needed a small chain to settle AB9.

 

by: kmr

 
 
same for me. I liked it very much but needed a chain to decide on column 9.

 

by: Christoph

 
 
@Ben, @kmr:
my way was : H9 cannot be 4 (leaves E9=12 , which is not unique).
Thus my conclusion was AB9 must be 43.
But I realize now that it could also have been 89.
Thus my way is based on a lucky failure. Sorry about that.

 

by: pets

 
 
I could clear G3 with setti 2. After that I could exclude 5 from B9, as this would lead to 5s in column 8&9 and a setti violation. But that still left me with 3/8/9 in B9 and a chain. Still curious if there is a chainless way.
Thank you, hoke!

 

by: hoke

Add to this thread
 
There are further eliminations, but they do not solve the puzzle: 2 in H56 because of Xwing 2, 3 in CD2 because of UR in AB12, 1 in B2 because of contradiction in CD2, 3 in B3 because of ywing BC23.

by:morl

 
is.gd/morl452X

 

by: hone

 
 
Thanx morl. Very tricky. Two UR preventions and a small SI needed.

 

by: Harm

 
 
For me this was very demanding. I had to use the X-Argument until the end. I needed one UR, wings and some Settis.

 

by: pax

 
 
A wonderful puzzle, as the one of home.

 

by: pax

Add to this thread
 
I don't like auto correction, but it often helps. The second time that I called Hone home...sorry for that.

by:hone

 
is.gd/hone452_H

 

by: ghw

 
 
Thanks,hone!

It's how I like it.

 

by: Christoph

 
 
very nice, hone. lots of various wings, besides standard tools.
Thanks.

 

by: Harm

 
 
Thank you, hone. I needed very careful work to see the tools needed to solve.

 

by: pets

Add to this thread
 
Thank you, hone!
As my wing-spotting abilities are rather poor, this was tough work for me: But finally it solved!

by:Christoph

 
I used a UR, and at the end a SI to find B4 and to solve this nice puzzle.

 

by: kolumbus

 
 
yes, nice puzzle. I didn't need UR, just wings and setti, and at the end a micro chain (wrong number on A1 immediately leads to a contradiction on D1 or D2)

 

by: hp

 
 
very clever Kolumbus,didnt see that; stared minutes on the board without finding an easy way out for the last few cells

 

by: morl

 
 
A mini XY-Chain D2-A2-A7-B7 solves B2 and the puzzle. Nice.

 

by: Andrejs

Add to this thread
 
To finish solving I notice that 9 is one of the sure digits in row A (9 must appear in A12 or A789). Thus we got an X wing with 9 on rows A and C which solve remaining cells.



Article created on 27-June-2010.
This page was last modified on 17-April-2011.
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  • 28 pure logic. Fun puzzle!
       - puh - 17 minutes ago
  • 39min; settis helped
       - Hildi - 1 day ago
  • 39min; settis helped
       - Hildi - 1 day ago
  • took me 35' and a guess on A1 - not satisfied. did I miss "simple" things?
       - joeB - 1 day ago
  • 34 min. - very nice one :); used a lot of setttis
       - Nessie - 1 day ago
  • Wow. I had to play through an assumption that luckily played out.
       - Fleurette - 2 days ago
  • It took a lot of time to solve the puzzle, but I use only basic tools.
       - Andrejs - 2 days ago
  • couldn`t do it Sunday or yesterday, today it was so clear how to proceed. Nice puzzle
       - easydoesit - 2 days ago
  • i was about to solve it, but this question deleted all my attempts to solute it
       - alf - 3 days ago
  • what is a setti and what is a chain?
       - alf - 3 days ago
  • war ganz schön schwer
       - wjanet - 3 days ago
  • a real 5*
       - bsz - 3 days ago
  • 21 min.
       - Katjulik - 3 days ago
  • 1:10 - really had to struggle at the end
       - selecti - 3 days ago
  • 44 min, lots of this and that, very nice one
       - Boerny - 3 days ago
  • 44 min
       - Kurt - 4 days ago
  • A few settis and then a chain.
       - mparmen - 4 days ago
  • 47 min. Nice one.
       - TM - 4 days ago
  • 55' Settis and some wings and fishes
       - ThomasF - 4 days ago
  • settis and logic
       - Benny_42 - 4 days ago
  • 35 min
       - 7iron - 4 days ago
  • 41 min, settis
       - Torsten&Irina - 4 days ago
  • 27 min - logic and settis - NICE
       - Stef - 4 days ago
  • 1'24'' Interesting one, kind of wasn't clear until the end
       - MoSeS - 4 days ago
  • CE, settis, small chain in the end. Nice!
       - Martinus - 4 days ago
  • 33 min. Nice one with lots of settis...
       - LK - 4 days ago
  • 1h18, while planning a journey.
       - abracadabra - 4 days ago
  • 38' No guessing just setti, fishes and logic of course.
       - confusedbynumbers - 4 days ago
  • 28 min, very nice one, many settis, one x-wing and at the end a chain.
       - Nessi - 4 days ago
  • 15 min, just BCA needed
       - Loser - 4 days ago