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#725, May 12 - May 18:
The Weekly Extreme Str8ts Puzzle

by Andrew Stuart
WARNING: This is the Weekly 'Extreme' Str8ts.
Only attempt this puzzle if you have time and patience.
Using the solver will not help you. (much).
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.
Share and Enjoy
Puzzles 1 to 250 are available as Puzzle Packs, just $5.49. Pack 3, 4 and 5 just released!

Discussion...
Posts you have NOT read are in normal colors, older ones are in grey.
Please email me if you experience problems or bugs. Cheers, Andrew Stuart


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by: hp

 12-May-2024, 11:28 Reply to this post
Nice and relaxing
Shortest path for me was Setti6 plus xwing1

by: kst

 12-May-2024, 06:49  
 

by: Martinus

 12-May-2024, 08:32  
 
Thanks, kst! Nice level. B power, b settis.

 

by: BP

 12-May-2024, 09:40  
 
VCE for starters, very smooth. Many thanks, kst, happy you're back!

 

by: Hel

 12-May-2024, 13:03  
 
Very nice, done without candidates. Thanks, kst, and welcome back!

 

by: Loser

 12-May-2024, 16:57  
 
nice set - THX

 

by: kmr

 13-May-2024, 14:50  
 
Smoothly running, very nice, no special techniques needed. Thanks, kst.

 

by: optimator

 13-May-2024, 19:56  
 
nice, thanks for your wonderful puzzles!

 

by: Susan

 14-May-2024, 17:32 Add to this thread
 
Got it the wrong way in my first attempt, but now it was great!

by: kst

 12-May-2024, 06:48  
 

by: BP

 12-May-2024, 14:45  
 
Very smooth with B Setti power.

 

by: Hel

 12-May-2024, 17:01  
 
Like BP, thanks!

 

by: optimator

 15-May-2024, 16:32 Add to this thread
 
I needed a chain at the very end

by: kst

 12-May-2024, 06:48  
 

by: jgrab

 12-May-2024, 09:58  
 
17 min; very nice, thanks. Easy initial determination of A1-B2-C3 hi/lo; the rest follows.

 

by: BP

 13-May-2024, 17:13  
 
I also started with a littles HC to determine hi/lo on the diagonals, smooth progress after that. Many thanks for another beautiful set!

 

by: aw

 14-May-2024, 07:17 Add to this thread
 
Like jgrab (omit the "easy"); took me a while to spot the magic triangles and very skew wings on the lower diagonals (... few X-Puzzles have E5 as a white field <:-).

by: kst

 12-May-2024, 06:47  
 

by: Auwei

 12-May-2024, 07:33  
 
Welcome back, kst!


 

by: kmr

 12-May-2024, 07:39  
 
What a wonderful Sunday morning surprise to see new puzzles. Thank you, kst.

 

by: Nessi

 12-May-2024, 07:55  
 
Fortunately you an your fabulous puzzles are back. Thank you, kst!

 

by: jgrab

 12-May-2024, 10:29  
 
30 min; CE, wings, and Setti consideration on 3.

 

by: BP

 12-May-2024, 14:48  
 
Stuck after 10 solved cells. Found a 5-fish on 3, which is probably the equivalent to jgrab's setti consideration. @jgrab: Any hint how to proceed with CE and wings?

 

by: TRP

 12-May-2024, 16:22  
 
@BP
I needed a HC/SI to decide hi/lo in column 6. H6 = 9 leads to a conflict in column 2 (as far as I remember).

 

by: Tati

 13-May-2024, 18:06  
 
@BP: or you test the two possibilities in H9: Both lead to the same number in F9.

 

by: Auwei

 13-May-2024, 18:28  
 
@various: I got stuck after 9 solved cells. TRPs way leads definitely to the goal, Tati's conclusion I could not verify, as my progress is apparently not sufficient (9 instead of 10 solved cells).
kst is keeping us busy (again)

 

by: BP

 13-May-2024, 18:51  
 
Hm, not to be a spoil sport, but as I said I'm not looking for a head chain but for jgrab's solution with CE and wings. Having high regard for jgrab's capabilities I usually assume that his solutions are correct. However maybe he made a lucky error this time?

 

by: MME

 14-May-2024, 09:04  
 
@Auwei: After 9 solved cells:
1) 6 is a must in col 1, otherwise: swordfish 6 => 6 in GHJ6 => naked tripel in row D and swordfish 2 => D1=2 => D6=4
2) CE in GHJ6 => naked pair in row H


 

by: Ben

 14-May-2024, 17:38  
 
@MME, that's a great observation that if J1 != 6, the swordfish on 6 would result in a contradiction on 2.
A couple of corrections on your post.
1) I think you meant F1=4, as D6 would be 8 or 9
2) I think you meant a hidden pair (on 78).

Also, that still leave just 12 solved cells, and I don't think it can be solved with CE from there. I also don't know how BP got to 10 solved cells (rather than 9).


 

by: MME

 14-May-2024, 18:03  
 
@Ben: in both cases you are right

 

by: BP

 14-May-2024, 19:42  
 
@Ben: By UR A2<>6 and B1<>7,9.

 

by: Ben

 14-May-2024, 22:57  
 
Thanks BP

I agree UR means A2<>6 & B1<>7

Not sure why B1<>9 - as B8 is still potentially 7.

 

by: BP

 15-May-2024, 04:16  
 
Ben, if I remeber correctly: If B9=9 then 7 not in col 1 and therefore by Setti not in B. Then B1=9 may be replaced by B1=7.

 

by: MME

 15-May-2024, 08:03  
 
@Ben: Next step for me: There is a dependency between E6, E9, H6 and H9.
1) If E9=5, then DE6 is high, H6=6 and H9=1. This excludes 7 from D9 and F9.
2) Similar: There is no 9 in E69. Otherwise DE6 is high, E9=7 and H9=1.


 

by: Ben

 15-May-2024, 14:27 Add to this thread
 
Thanks BP & MME,

I like your combination UR/Setti logic BP.

MME, Yes, very nice SI logic to clear up the puzzle.

Page created on 27-June-2010.
This page was last modified on 08-Jan-2023.
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  • 27min, gave it a try on AB1
    - susu
  • Got it done, by hook or by crook.
    - Essie
  • 31 min nach einigen Fehlversuchen
    - Rot
  • 17min
    - Julioflor
  • Close to 50 minutes. Took a while to see wings on 1 and 4
    - EddyBear
  • 21:38 - with some more sleep;-)
    - Latimer
  • 30' - with one (instantly successful) tiny chain.
    - A B Traherne
  • ~25' nothing unusual except another 1-setti
    - optimator
  • Just logic - but needed one little tricky idea. After it to complate 4 min. Sum: 49 min. Very enjoyable!
    - vicus
  • 30' with one lucky decision in C3-4
    - Ske
  • Row D is clear, then followed hp's hints, which didn't change much for me. And now?
    - Fred
  • 39 Min. hard work, lucky guess on G1
    - Joe Reitzl
  • Musste erst D1 erkennen, dann geht es gut weiter mit Settis. Nicht einfaches Rätsel für mich, aber schön. 2h Danke
    - S. Walt
  • giving up yesterday, it took me 14' today. nice puzzle
    - easdoesit
  • 30min, straightforward
    - puzzled
  • finally I did it in 18 min.T he weeks before I thought I am a dumb fish with no brains at all. Besides: I am 79 year old!
    - doro
  • 31:11 - had to start twice, but then pure logic.
    - Latimer
  • 37' with wings, pairs and CE. Thnx4nice sunday-eve.
    - UZ
  • ~20min with breaks, nice one, smoothly straightforward, pure logic, no special tools needed. Thank you.
    - DrNo
  • 27' - nice Sunday evening puzzle. Thanks!
    - triemers
  • 52, nice
    - chris
  • about 30 min
    - Loser
  • 27 min. Nice and doable,
    - Beate
  • About 25 minutes, with candidates because of several naked pairs
    - Jan
  • 17' logic only
    - ttbass
  • Finished for the first time in several weeks - 49 minutes
    - WiltshireEagle
  • 45 min, nice
    - 7iron
  • 19 min
    - humpti dumpti
  • 16 min - nice and very str8forward
    - Susan
  • 26 min, right decision in F9 and then pure logic.
    - poblid
  • Nice, solving begins in row D, then only settis and logic.
    - MrL
  • 35 min, very nice, for me a couple of settis, column D and the rest logic. No wings needed.
    - Emma
  • 17' nice one
    - Maven
  • 24', I had my problems to find the logic, nice one!
    - Ute
  • 47 min. A very big fish led to the solution. Nice.
    - juehe
  • 27 min; nice
    - jgrab
  • 24' - only logic
    - sumsum
  • excluding several breaks about 25 min, just logic,
    - EC
  • 34 min.
    - kid
  • row D, 2 fish, 1 fish, I assume there are also solutions without fishing
    - OneGuess
  • 28" needed a lucky guess
    - Bassam
  • 35' nice
    - ThomasF
  • 18 min, settis, wings
    - Torsten&Irina
  • 14 min. - after all those hard weeks an easy one
    - Susi
  • 32' nice challenge
    - Richard
  • 4'30 - row D ist the key
    - Nessi
  • 22' one setti and one wing. Rest is CE, very nice
    - KDN
  • 40‘ When I got D2 (without tools, just neurons) the rest was possible (but not easy) without chains
    - TheSolvingOne
  • 22 mins, very very nice.
    - Miss P
  • 30 min, nice, only standard tools necessary
    - Cosmanita
  • 46'. WC. Nice one and a little bit tricky :-)
    - MartinL
  • 27 min. nice, even for me, no settis, no fishes, the key was in row 9, then line D
    - Konrad
  • 26 min. - no guesses necessary
    - tbr
  • 21 min, one guess
    - ulla
  • 13' nach 2. Anlauf, relativ einfach
    - zoo-pony
  • Beautiful Sunday morning challenge, 1h/1SI.
    - E.H.
  • 19 min, mit viel glücklichen raten.
    - dersoloist
  • Nice - with one setti, swordfish and x-wing.
    - Jens