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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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by:morl

 
is.gd/morl456

 

by: Jan

 
 
With 14 cells solved after settis and wings, there's an obvious UR, but it doesn't seem to help much. All I can do is a long contradiction chain on a cell with two candidates; the other solves easily.

 

by: Ben

 
 
Hmm, after 14 cells solved, I found an 'obvious' UR that helped a great deal, solving the entire top-left corner. Another UR removed a single candidate. Then a short SI solved G8 and I was done.

A good puzzle with a good level of complexity.

 

by: morl

 
 
The puzzle is solvable w/o the UR with a single chain (lengh: 5 cells) that consists of only 2-candidate cells.

 

by: morl

Add to this thread
 
Typo correction: length: 5 cells...

by:hoke

 
is.gd/hoke456X

 

by: Astrid

 
 
smooth X-puzzle with a nice interaction of the diagonals
thx hoke!

 

by: Sonja

 
 
Nice and relaxing, many thanks!

 

by: jgrab

 
 
Thanks. Nice; needed a short head chain to clear A9 after I got stuck.

 

by: Christoph

 
 
Like Sonja, nice and relaxing puzzle, wthout Si or chains.

 

by: Augenweide

 
 
Not so easy, took me a while (BCA on 2) to find the clue.
Thank you, hoke!

 

by: Jan

 
 
At ten cells solved, one is tempted to use the UR at J9. But this is wrong, because that cell is coupled via A1 and C3 to the rest of the board. But it does give rise to a short, five-cell chain that solves G9 and with it the puzzle.

 

by: Ollie

 
 
Maybe a stupid question: A1 and J9 - are they single compartments or do they belong to the diagonal?

 

by: Berny

 
 
@Ollie: Belong to the diagonal

@Others: Used like jgrab a very short SI/HC on A9 after 10 cells.

Could anyone explain how to solve completely WITHOUT a SI???

 

by: Ollie

 
 
ok ... really silly question ... of course one big compartment

 

by: morl

 
 
After the basics, the \ diagonal has its only 9s in A1 and J9. If A1=9, A5<>9 so G5=9, and if J9=9, G9<>9 and again G5=9.

 

by: Berny

 
 
@Morl:
yep... I guess that way is similar to the A9 approach (4 in A9 forces A5 and J9 to be 9, so no 9 left in G), but isn't that a SI as well?

 

by: hoke

 
 
My favorite SI was, that 2 in E7 would remove all 2s in the \ diagonal. But yours is even more str8tforward.

 

by: Augenweide

 
 
Just like hoke, it was E7 to me. BCA for 2 says: 2 must be missing in E or F; with E7=2 that would not be possible, because \ requires F6=2.
However, morl's and Berny's way ist more to the point, them medal goes to them!

 

by: Ben

 
 
Basically like Berny & morl, I used the 9's. My conclusion was that either 9 in the diagonal set G9=7. So a 3rd way of seeing the same thing.

I this hoke and Augenweide are seeing differently also. Hoke talks about an SI, so I read that as E7=2, E5=4, F5=25 - removing all 2's from diagonal.

But Augenweide's description is pure BCA 2 is missing from with row E or F, but if E7=2, and BCA removes 2 from F6, ... So it's a non-SI solution in my mind.

 

by: Christoph

 
 
My (lucky) failure was that I had simply overlooked the potential candidate 9 in J9. Thus it was straight forward.

 

by: Berny

 
 
@Christoph: Ah ok, thanks for the info! That explains the situation...

 

by: Jan

Add to this thread
 
As I mentioned solving G9 above, you can deduce I used Ben's argument.

by:hone

 
is.gd/hone456_Rain

 

by: jgrab

 
 
Thanks. 36 min; develops nicely after CE and some Setti calculation on B1 etc.

 

by: Augenweide

 
 
2B or not to be, this is the crucial cell.
Very nice, thank you, hone (and Shakespeare)

 

by: Ben

 
 
With 13 solved cells, I need a short SI in columns 6/7.

 

by: Harm

 
 
Thank You hone, solved it with an 8-fish and UR. No chain, no SI.

 

by: BP

 
 
Very enjoyable, but we needed Augenweide's (and Hamlet's) hint to avoid chains. Thank you very much!

 

by: Jan

Add to this thread
 
I agree, you need either the UR or the SI, both of which lead to the same conclusion about B2.

by:Klaus

 

wow, great, finally here it is, good luck

 

by: Andrejs

Add to this thread
 
I was glad to see new puzzle. Thanks. After CE and some x wings I found a naked triple in row B, which solves all puzzle.



Article created on 27-June-2010.
This page was last modified on 17-April-2011.
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  • 29 min :)
       - silke - 2 hours ago
  • 15 mins. Str8 forward
       - JochenK - 7 hours ago
  • 67 min. Too long.
       - D-Day - 1 day ago
  • 18', needed 2 settis and patient logic.
       - klaus - 1 day ago
  • done! I don't know the time because I took many breaks in between. Only logic and few Settis. Lovely.
       - Emma - 1 day ago
  • 19'; just one setti was enough
       - martijn - 1 day ago
  • 31 min. Settis and logic. Nice.
       - mv - 1 day ago
  • 18 min with the help of Klaus in Row B
       - Batschi - 2 days ago
  • Stucked..I found a 6-wing and a 5-setti. Where is the key?
       - Cosmanita - 2 days ago
  • ~45 min. nice and not too easy
       - Boerny - 2 days ago
  • second attempt, needed a guess :(
       - 21min - 2 days ago
  • 41 Minutes.
       - GiddyG - 2 days ago
  • 15' solvable 5 star, having fun
       - sleepy - 2 days ago
  • No thing -while decarbonating the coffeemachine, And the first cup of coffee was just half off.
       - NoHa - 2 days ago
  • 2h - my first after a long time
       - jupfi - 2 days ago
  • 27 min - bed is a good idea
       - relijo - 3 days ago
  • 14 min - nice one
       - 7iron - 3 days ago
  • 60min; lets go to bed with sweet dreams.
       - abracadabra - 3 days ago
  • Some settis and logic.
       - Benny_42 - 3 days ago
  • A quick one! Very nice, thank you, Andrew!
       - BP - 3 days ago
  • mit viel Raten endlich geschafft
       - wjanet - 3 days ago
  • 15 min
       - Loser - 3 days ago
  • Trallalallalllaala
       - uli - 3 days ago
  • 35' no setti needed
       - Hel - 3 days ago
  • 35' logic, some wings, some settis
       - ThomasF - 3 days ago
  • 50 Min. multiple settis and one x-wing
       - joe reitzl - 3 days ago
  • beim zweiten Mal in 20 Minuten, keine Ahnung, wo vorher der Fehler lag.
       - Sabine - 3 days ago
  • 13:30 by hand - pretty easy
       - Jan - 3 days ago
  • >1h - almost gave up
       - selecti - 3 days ago
  • 23,only logic
       - poblid - 3 days ago