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by:morl

 
No chains. Might be a challenge though...

is.gd/morl523_2

 

by: ghw

 
 
Thanks morl, a nice level of difficulty.

 

by: Claus H. Tonelier

 
 
Hi there - I am stuck at 8 solved cells - donts see a way without chain - anybody got a hint? Thanks in advance!

 

by: morl

 
 
@Claus H. Tonelier: maybe some Setti can help. There's a combination of 3 digits which looks helpful. BTW: The same puzzle with a black cell in A4 instead of A3 has also a unique solution, but is quite chainy.

 

by: Cole

 
 
If F7 is 7 the F789 is 123. This is a UR. Therefore F7 cannot equal 7.

 

by: Cole

 
 
Sorry meant f1 cannot be 7.

 

by: Claus H. Tonelier

 
 
@cole: I already have G1=7.
@morl: dont see it - I have full setti on 7 and 4 - no 3rd number?

 

by: morl

 
 
It's Setti on 2, 5 and 8 (cols 2 and 6 give some information)

 

by: Leren

 
 

Another way is to note that E4 and F4 can't be 9. If either were 9 you would have a 79 UR in EF45. That makes 3 a must in all columns, so A1 = 3.

 

by: morl

 
 
OK, but w/ the use of Setti, no UR is needed.

 

by: BP

 
 
Great puzzle! Got stuck after a few cells, but then remembered Jeeve's strategy to consider the psychology of the individual, in this case of the puzzle creator. Recalling that morl is a great fan of combined settis was the key. The choice of 2,5,8 was rather obvious then. Thanks, morl, for this great challenge!


 

by: Claus H. Tonelier

 
 
@Leren: thank you - thats a smart move that really started the final step!

 

by: Marya

 
 
@Leren: I can't follow your argument. I see that, if EFG4 was 789, E5 would have to be 7 or 9. But, at the point where I am, F345 might still be 567, so not necessarily 79 in F5. What did I miss?

 

by: Marya

 
 
Sorry, I have to correct my question: It should read: If E4 was 9, E5 would have to be 7. But F345 could still be 567, with 5 in F5.

 

by: Jens

 
 
I could understand Cole and Lerens way. To avoide FG89=ur12 F1 cannot be 47 and to avoide EF45=ur79 should 4EF without 9, which makes 3 secure. In addition some X-Wings and a Swordfish are to find.
Really a nice riddle, thx morl.

 

by: Jens

Add to this thread
 
@Marya
If E4~9, then J2~8, G2~6, G1~7, G4~8, F4~7 and F5~9, getting ur79.

by:Leren

 

No chains, UR's or SI's.

is.gd/Leren_523_X2

 

by: morl

 
 
Thanks, difficult till the end, but w/o chains as said. Only skewed wings.

 

by: jgrab

 
 
Good step-by-step challenge! Don't ovberlook the simple things!

 

by: Jan

 
 
OK, so I must be overlokking something simple, then...

7 cells solved, three of them on the / diagonal, used the two obvious settis. What now?

 

by: Ben

 
 
Jan, I recall an x-wing or two.

 

by: Leren

 
 
@ Jan

Easy X moves action at 7 solved cells:

Pair of 9's J12 => H2 <> 9
Pair of 8's on / B8, D6 => B6, D8 <> 8
Pair of 9's on / B8, J1 => B2 <> 9
Naked Pair 25 on / F4, H2 => B8, D6 <> 25, F2 <> 2

 

by: BP

Add to this thread
 
Like morl, chainfree but difficult, took us a while to find all the neccessary wings.

by:morl

 
A challenge once in a while:

is.gd/morl523_1

 

by: jgrab

 
 
Nice difficulty; with standard tools only.

 

by: Susan

 
 
Very Relaxing 9 min

 

by: Ben

 
 
I'm not sure how jgrab and Susan found it so easy. After 18 solved cells I needed a chain.

 

by: BP

 
 
Like Ben, stuck at 18 cells. Any hints, jgrab or Susan?

 

by: Jens

Add to this thread
 
A whirl picture, which stopped after 18 solved cells too. I needed guesses together with bca2.

by:Ben

 

is.gd/ben_523_X

 

by: jgrab

 
 
What a beautiful pattern! 8-)) Hard x-work! Took me far more than one hour.

 

by: pax

 
 
A very easy start, but in the end I needed a head chain, and I used a (surpising) UR.

 

by: Leren

 
 
Easy start as pax said - got to 24 solved cells without an X move. A key move was a finned X Wing that solves E5.

 

by: Augenweide

 
 
J1 and later C9 were they crucial cells; assumptions lead quickly to conflicts. Afterwards smooth and relaxing. Great pleasure!

 

by: BP

Add to this thread
 
Beautiful pattern and beautiful puzzle. Whole toolbox and two 3-cell-SIs.

by:Leren

 


is.gd/Leren_523_X

 

by: kolumbus

 
 
again a very nice x-puzzle, needed a tiny SI, thanks a lot

 

by: BP

 
 
Very good challenge. Needed whole toolbox including 2 tiny SIs. Many thanks.

 

by: Cosmanita

 
 
Were are the SI? I do not get further.

 

by: Leren

 
 
@ Cosmanita

Early on at 7 solved cells have a good look at AJ89.

 

by: Cosmanita

 
 
..that helps me to solve A9, but how to get the other cells solved?

 

by: Leren

 
 
@ Cosmanita

My solution path obviously differs from yours but here goes anyway.

The SI => A9 <> 4. NT (789) ABC9 => F9 = 6 and then D4 = 6 is a single on \, which also solves D23.

A bit further on there is a regular 7 Fish of 4's in c2346789 / rBCDEGHJ. So 4 is in J789 so 1 isn't => C7 = 1 is a single in Column 7, H8 = 1 is a single on \ and E3 = 1 is a single in Column 3. Solved cells at that point are 14.

I'll stop there. Hopefully that is enough hints to see you through to the end.

 

by: Cosmanita

Add to this thread
 
Thank you Leren for the hint...so was missing the 7-fish of 4's.

by:Leren

 


is.gd/Leren_523

 

by: Jens

 
 
Fishes and bca conclusion, thx.

 

by: jgrab

 
 
Thanks. Some Setti interdependencies made it quite complex for me.

 

by: BP

 
 
Tough. Besides setti considerations I needed 2 SIs and an UR. Thanks, Leren.

 

by: Jens

 
 
After a jelly2 and a wing4 I used bca3, jelly5, sword8, wing7 and wing4.
Then bca8: 8 is missed in rowA, so 8 is missed in col1 or col2 too, which indicates missed 4 in col1, or missed 1 in col2.
This is exactly the same question in rowA, where 1 or 4 is missed.
The clou is, therefore 4 must be in rowG, G2=4 ... ready.

 

by: pax

Add to this thread
 
Similar to BP, but no UR.

by:Leren

 


Reserved for discussion of Andrew's puzzle.

 

by: Andrejs

 
 
This week's puzzle was easy to solve. I do not shy away from using Setti's rule, because it is also pure logic. This time I use Setti on 6, Setti on 7, X-wing on 6, X-wing on 1, as well as naked triple in column 1. There was no problem anymore.


 

by: Jan

Add to this thread
 
Again one of those puzzles that is automatically completed by the solver...



Article created on 27-June-2010.
This page was last modified on 16-March-2020.
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  • Trallalalaallala
       - uli - 1 day ago
  • 18 min. - too easy for 5 stars :/
       - Kid - 1 day ago
  • 12 min - pure logic
       - relijo - 1 day ago
  • 11' running right through, no settings, no nothing needed
       - Ske - 2 days ago
  • 28' and str8t forward
       - barbara - 2 days ago
  • 17:50 nice logic
       - JFerb - 2 days ago
  • 18 nice one
       - dwg - 2 days ago
  • 14' logic
       - ttbass - 2 days ago
  • 31min
       - essie - 3 days ago
  • 13' not too hard, nice though, pure logic
       - hrw - 3 days ago
  • 9:53 Nice one
       - Luuk - 3 days ago
  • 34' - just logic
       - CEE - 3 days ago
  • 11min
       - GML - 3 days ago
  • 38 min, too much time, but done!
       - marianne - 3 days ago
  • 20 minutes without candidates - whew!
       - Jan - 4 days ago
  • 12:22
       - Mike - 4 days ago
  • 14' just logic, but not boring. thank you so much for the puzzles!
       - klaus - 4 days ago
  • 10' str8
       - Jo - 4 days ago
  • 22 min - shouldn't take that long
       - puh - 4 days ago
  • 22 min - shouldn't take that long
       - puh - 4 days ago
  • 7 minutes 50 seconds, one guess about column 1 to speed through
       - Daniel - 5 days ago
  • 16 min - logic ..
       - Stef - 5 days ago
  • 36' - don't know why it took me so long
       - selecti - 5 days ago
  • 14 min, straightforward
       - 7iron - 5 days ago
  • 20 min. - nice
       - Nessie - 5 days ago
  • 20' - pure logic, not too difficult, very nice!
       - carpat - 5 days ago
  • 29', str8 forward
       - chris - 5 days ago
  • 9' No setti needed
       - Sonja - 5 days ago
  • 13' brain not working properly...
       - martijn - 5 days ago
  • 11:35
       - Ronny - 5 days ago