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#821, March 15 - March 21:
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).
Oct 18th 2024
The solver can now handle Str8ts variants. Yay! The solver button on the player will now pass an appropriate parameter.
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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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: Pete

 15-Mar-2026, 17:35
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Phew, really tough set this week, the jigsaw puzzle seems to be the most feasible, funny ...
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by: hepa

 15-Mar-2026, 11:28
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4
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7
 

by: kris

 15-Mar-2026, 14:25
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 Once again a wonderful (chainfree) puzzle, thanks hepa!
 

by: Harm

 15-Mar-2026, 21:21
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 Now that I understand how jigsaw puzzles work (thanks to hepa, Ben, and hoke for their explanations), these puzzles are a ton of fun—like this one, which was really nice to solve—thanks again to hepa
 

by: Hel

 16-Mar-2026, 13:17
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Very very nice, thanks hepa!
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by: acs
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2
 The Weekly Str8ts B puzzle #213
 

by: Hel

 16-Mar-2026, 11:50
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1
 21' WC
 

by: kmr

 16-Mar-2026, 16:53
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 This week the most relaxing puzzle. Thanks!
 

by: optimator

 16-Mar-2026, 19:39
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20' nice one, not too hard or chain needed
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by: acs
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 The Weekly Str8ts puzzle #821
 

by: Klaus

 15-Mar-2026, 06:54
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A9 <> 6 helps
 

by: hp

 15-Mar-2026, 16:05
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 despite the hint not so easy
my shortest path (with hint):
CE Row J (no 5 in J7),Setti 8 and 6, xwing on 9.
 

by: MME

 15-Mar-2026, 18:27
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 I needed a chain to confirm A9<>6.
If A9=6, there is a Jellyfish on „8“ in BCDE => AF8 is high.
After CE in col 8 and 9:
In rows BC is a x-wing on "2" in BC56
In col 5 "1" can only occur in BC5
=> there is an UR in BC56
 

by: Klaus

 15-Mar-2026, 19:25
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the assumption of A9=6 also leads to a contradiction to Setti on 2 by elementary means.
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by: acs
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5
 The Weekly Str8ts BX puzzle #213
 

by: Cosmanita

 15-Mar-2026, 19:36
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 Tough, I could solve it finally by checking no 1 in box 1, J1 not 3/4, E5 not 6, G4 not 3, G7 not 3.
 

by: AndreasM

 16-Mar-2026, 08:06
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 Tough, indeed! I made use of a UR-argument (C12 can't be 3:4) to decide on the digit in A1. I was not happy with this, but couldn't find anything else. Hmm!
 

by: Maven

 16-Mar-2026, 12:53
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 Took me almost 2 hours. Tough one!
 

by: Neunmalneun

 16-Mar-2026, 21:44
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Thank you for the hints: Very helpful!
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by: acs
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6
 The Weekly Str8ts X puzzle #213
 

by: Only Human

 16-Mar-2026, 09:59
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 super difficult - but one high/low decision column 1 GHJ did it finally - very nice!
 

by: jgrab

 16-Mar-2026, 17:28
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First success since weeks! HI/lo chain for col 5 made it for me, the rest was basically CE.
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Page created on 27-June-2010.
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Copyright Jeff Widderich and Andrew Stuart @ Syndicated Puzzles, Privacy, 2007-2024
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  • 36' on second attempt - 1 guess (some like to call it chain) necessary
    - selecti
  • @SH, A9 is NOT 6. In the Str8ts-Forum, if somebody wrights ><6, it means: not 6.
    - mike
  • I got crazy or be too stupid. If A9 =6, then HJ8 1 and 2, Where is the 5 in J and the 1 in col5.....
    - SH
  • 35' with fred/dersoloists help - so easygoing! Danke!
    - barbara
  • 30 min ... hard one! Nice!
    - Stef
  • 45 Min. a hard nut!
    - Joe Reitzl
  • wasn´t it the higher right corner?
    - chris1
  • an chris 1, help from fred again that the lower right corner must be low helps a lot.
    - dersoloist@
  • 21 min im 3. Versuch, aber nur mit dem Hinweis von Klaus
    - Rot
  • hours! most hints were no help
    - chris 1
  • chain, chain, chain :-))
    - walt
  • Leider zum Schluss kleine headchane auf Säule 6 regarding 6 und 7 ... ansonsten viel Logik und Settis.
    - walt
  • > 1 hour - only settis, wings and logic, but very hard
    - Michael
  • 2:16:47 extrem schwer und ohne "hints" geschafft.
    - zoo-pony (Tartlau)
  • ohne hilfe, wo gesagt wurde dass da was niedriges ist, hätte ich es nicht gelöst
    - dersoloist
  • Lucky finish.
    - jgrab
  • Hatte A9 schon richtig erkannt. Sehr schwer trotzdem. Drei Versuche.
    - S. Walt
  • setti 3: but cannot be in row 8 H/J because UR, so 3 must start above H/J, means H/J cannot be 8, must be 1 and 2
    - fred again
  • 14:40 - great entertainment, thanks a lot for this one! Only standard tools needed, no hint, no tries - but one creative conclusion ...
    - fred
  • 29' - second try, with hint
    - COM
  • 23 min, 3rd attempt, settis, wings, nice
    - juehe
  • All logical. CA of col9 possible combinations solve much, then couple of 3-fish and setti. No hint needed.
    - MrL
  • even with hint a hard nut
    - straddict
  • 32 min with the hint
    - 7iron
  • Second attempt, still heavy 37 min
    - SisterZ
  • difficult: I had to resort to several chains.
    - optimator
  • <> means not equal
    - hoke
  • Klaus Tipp heißt kleiner oder größer (<>) als oder ist gleich (=) 6??
    - biggi
  • 45'. Finally used the hint after a long time stuck.
    - Maven
  • 32 min - nice one. Took Klaus' hint
    - Beate
  • 45 min. - hi/lo col. 9; wings, settis, very nice
    - Nessie
  • >1h. Tricky but nice.
    - MartinL
  • '36 with Klaus' hint. very nice
    - KDN
  • 1 h, HI/LO in Col. 9, no hint, no solver.
    - H.E.
  • Wichtig Klaus' hint in my mind, then a look at the column and Elimination I made it.
    - bhk
  • 20' with Klaus' hint and standard tools
    - ThomasF
  • 36' with Klaus' hint and h/l decisions. Hard nut.
    - Alan B. Traherne
  • 15 min
    - Nessi
  • 16 min - h/l last two columns
    - Susi