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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:morl

Reply to this post
This week's puzzle is very easy. Remove the clues in A9 and F1 if you want a little more fun.

by:Santa Stefan

Reply to this post

is.gd/2018_6_days_left_str8t


by:Santa Klaus

 

is.gd/2018_7_days_left_str8t

 

by: pax

 
 
Thank you Klaus, a very interesting one, solvable with head chaines for me.

 

by: jgrab

 
 
Thanks, very hard for me. Even after I understood col. 6 UR avoidance which solved D56. But thereafter???

 

by: Berny

 
 
@jgrab:
Have you looked at col 1, starting with D1, after that?

 

by: Astrid

 
 
Solvable without chains. Needed the unity rule quite a few times, i like that! thx

 

by: Ben

 
 
What is the unity rule?

 

by: Astrid

 
 
sorry, i was somehow convinced that's what the acronym "UR" stands for, but i was wrong. Of course UR means "unique rectangle" - if we assume that the solution to the puzzle is unique.

 

by: Jan

Add to this thread
 
Could someone explain the column 6 UR argument, please?

by:24:34 nice

Reply to this post
Latimer - That was an easy one! Thanks for the pleasure. Can't wait for the next one!

by:Tom

 
26' First time ever to get one of these solved! Need to train Settis more...

 

by: kolumbus

 
 
Hi Tom, welcome.
Setti's rule really is a powerful tool; however in this case it's not needed, the col-swordfish on ABD123 tells us that compartments B1-5 and D1-6 must contain 2, which solves the rest easily.

 

by: morl

 
 
however, for some people (including me) it's easier to see a Setti than a fish.

 

by: Andrejs

 
 
It is also my case. After CE (especially in column 7) the
Setti was my only tool.

 

by: Andrejs

Add to this thread
 
Sorry, I made a mistake: especially in column 8 (not 7).

by:Santa Stefan

 

is.gd/2018_8_days_left_Xstr8t

X Puzzle

 

by: ThomasF

 
 
thanks Stefan, that was a really nice one

 

by: Harm

 
 
Thank you Stefan. I needed the X until the end.

 

by: jgrab

 
 
40 min; step by step with standard tools. Thanks!

 

by: hp

 
 
puh very hard, but doable without chain Need the whole Toolbox
Thank you Stefan, undoubtedly another X masterpiece

 

by: aw

 
 
I really appreciate being forced to do X-Versions by this Advent calendar - the frequent problem is that somewhere in between I forget about the X and worry about uniqueness :-) Really a nice and doable one - thanks for all those puzzles!

 

by: kolumbus

 
 
Very nice and challenging, thank you, holy Stefan!
The key for me was CE on A-D4.

 

by: Jonas

 
 
May someone explain to me the "X-Factor"? Is it a tool?
Thanks in advance

 

by: Christoph

 
 
Jonas, you have to apply for the diagonals A1-J9 and J1-A9
(this "X") the same rules
as for all the rows and columns.

 

by: Christoph

 
 
Excellent X-str8t, Stefan. Solvable without chaining. Thanks a lot.

 

by: Jonas

 
 
Got it, thx Christoph (Danke!)

 

by: Jan

Add to this thread
 
Very nice...my first stumbling block was that I only considered G7H8 as an X-compartment instead of F6G7H8! And indeed an elimination in column 4 is crucial.



Article created on 27-June-2010.
This page was last modified on 17-April-2011.
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  • My first look at Str8ts after several years. Solved surprisingly easily with only basic logic and application of Setti's rule to 6s.
       - KMK - 4 hours ago
  • 21`- with settis . A very nice puzzle
       - carpat - 5 hours ago
  • 15 min. on second try (don't know where I went astray on the first)
       - joeB - 6 hours ago
  • 7 min. Very easy.
       - morl - 7 hours ago
  • 18' - very easy this week
       - selecti - 1 day ago
  • 11'
       - humpti dumpti - 1 day ago
  • 8 min - very easy indeed
       - Susan - 1 day ago
  • 29' was not really difficult
       - juergen - 1 day ago
  • 17 min - nice!
       - Stef - 1 day ago
  • Another most enjoyable puzzle!
       - Fleurette - 1 day ago
  • easy but lovelyh! Just one Settis and .... that was it!
       - Emma - 1 day ago
  • 50' some cells were tricky ^^
       - Student-Ger - 1 day ago
  • A settis firework indeed! No wings or other "advanced" tools needed.
       - GC - 1 day ago
  • 30' - nice, without chaine, only settis and accurate elimination
       - malue74 - 1 day ago
  • 18' - quite easy, one setti
       - Michael - 1 day ago
  • Sorry, my key was accurate eliminations in column 8 (not 7).
       - Andrejs - 2 days ago
  • 46 - beautifull
       - chris - 2 days ago
  • 15:45. Settis.
       - mv - 2 days ago
  • 17 min a few settis; loved it
       - Hildi - 2 days ago
  • Accurate eliminations in column 7 was my key. Good solving thread.
       - Andrejs - 2 days ago
  • 45' one of few extremes I'm able to solve. Besides one setti more like a 4* puzzle.
       - Tom - 2 days ago
  • 26 min - nice settis
       - 7iron - 2 days ago
  • I liked it
       - val - 2 days ago
  • 31 min
       - poblid - 2 days ago
  • 18 min, very easy and snowy
       - effchen - 2 days ago
  • 40 Minuten, war gar nicht so sehr schwer
       - wjanet - 2 days ago
  • 35:24; two attempts, same solution: "Unknown Error Occurred. hmmm."
       - abracadabra - 2 days ago
  • 24' nice and easy
       - Boerny - 2 days ago
  • 10 min.
       - Katjulik - 2 days ago
  • 8m40s (no guessing) - I must have gotten lucky and progressively looked at the right part of the puzzle - the cells fell like dominoszle.
       - MrBill - 2 days ago