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#830, May 17 - May 23:
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: hepa

 17-May-2026, 10:57
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6
 

by: Only Human

 17-May-2026, 14:44
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 another master piece. Thank you, hepa!
 

by: kris

 17-May-2026, 20:03
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 @Only Human or others: I'm stuck at 12 solved cells, my position: ibb.co/sv4hkYJS
Am I overlooking anything obvious? Is there a chainfree solution? Hints welcome!
 

by: kozibrada

 18-May-2026, 00:57
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@kris: Full Setti on 3, so if E1 = 3 → C4 = 3; if E9 = 3 → X-wing AB37 = 3 → C4 = 3.
It’s possible to figure it out by an advanced/“finned” jellyfish: AB3ABC4AB7BDEF9 + cell F8 (last missing cell for 3 in box 6) → 3 in F56 is eliminated. Also the strategy “empty rectangle” works, but it sounds more chainly. :-)
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by: acs
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6
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4
 The Weekly Str8ts X puzzle #222
 

by: jgrab

 17-May-2026, 02:14
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 42 min; good X-work. One chain on col 1 hi/lo.
 

by: Martinus

 17-May-2026, 09:04
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 Similar to jgrab. Settis important too. Nice!
 

by: hago

 18-May-2026, 07:35
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 Regardless of whether E45 is high or low → E2 is always the same number.
 

by: aw

 18-May-2026, 09:15
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Like jgrab (before reading his post, but with more time needed). Surprising singles on the diagonals; the work begins, when all low digits are solved.
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by: acs
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 The Weekly Str8ts B puzzle #222
 

by: tg

 18-May-2026, 08:03
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 Nice and easy. - Thanks!
 

by: EC

 18-May-2026, 09:39
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very easy
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by: acs
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2
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7
 The Weekly Str8ts puzzle #830
 

by: Cosmanita

17-May-2026, 22:16
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Very nice extreme str8t! Standard tools sufficient, but a step regarding the 3 was interesting.
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by: acs
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1
 The Weekly Str8ts BX puzzle #222
 

by: Cosmanita

17-May-2026, 07:21
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 Nice one, h/l decision in column 7 did it.
 

by: Stefan

 17-May-2026, 11:46
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 like Cosmanita
 

by: Martinus

 17-May-2026, 13:42
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 Got there with some chains in the end. Nice task!
 

by: jgrab

 17-May-2026, 14:25
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 Very nice. h/l in col 7 results from VCE.
 

by: jgrab

 17-May-2026, 14:26
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 At the end, E6 is the only cell with three candidates remaining.
 

by: hago

 17-May-2026, 16:51
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 @jgrab:
And what conclusion can you draw from that?
Why is that important?
 

by: jgrab

 17-May-2026, 21:43
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 @ hago: I think this is the best starting point to eliminate contradictions. Years ago, someone described a solution strategy rationale for these kinds of final situations in this forum,but I cannot reconstruct it ...
 

by: Ben

 17-May-2026, 23:57
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 @jgrab,

Possibly so, but for me at that point, there is a skewed X-wing in B5J5 / D6J1, which eliminates 5 from C6
 

by: EC

 18-May-2026, 09:36
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needed two chains
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Page created on 27-June-2010.
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  • ...easy, since you have G4
    - EC
  • Mit settis und viel Logik gelöst. Schön machbar. Danke. 1h
    - S
  • 14' straightforward
    - Maven
  • 10' only settis
    - glenn
  • 35', settis and CE.
    - UZ
  • 21' - just logic nice & easy. Thanks
    - triemers
  • 22:15 - nice & easy
    - Beate
  • 31 min im 2. Versuch - nettes Ende
    - Rot
  • 25 min, nice one
    - 7iron
  • look how many 3 you need - than easy
    - jürgen
  • 55 min - column 4 solves it
    - Elvis
  • jetzt hab ichˋs !!
    - biggi
  • 38min - about my level (fairly easy)
    - WiltshireEagle
  • Ich hab zu viele 7….warum?
    - biggi
  • 37 min
    - hopplahierkommich
  • Nice and easy.
    - MrL
  • 14 min., just filling in and some small fish/wings
    - flowerwaffle
  • 3/4 h with BCA.
    - H.E.
  • 24 min
    - JulioFlor
  • 26' easy morning
    - Cleo
  • my kind of logic. thanx. beautiful
    - chris1
  • 21 min- One very obvious swordfish solves almost the whole puzzle. Easy :)
    - effchen
  • 34 min. very nice, first settis, wings ar the end.
    - juehe
  • 25 min, settis, wings
    - Torsten&Irina
  • Filling cells, settis and careful elimination.
    - Solver_2
  • 36‘
    - A. Friend
  • 22' WC
    - Hel
  • 6:20
    - Nessi
  • 34 min; straight forward with 1 very special little wing at the end
    - Michael
  • 1:29 ...mal wieder in "Bestzeit"...Aber gut war's ;)
    - Marit
  • 28 min
    - kid
  • 32 min - setti 3 and in the end the question if there is a 4 in column 6
    - Susi
  • 16 mins, nice and easy.
    - Miss P
  • 16 min, entspannt
    - humpti dumpti
  • 0:26:32 leicht
    - zoo-pony (Tartlau)
  • 22 min, straight forward
    - Alex
  • 32'
    - Essie
  • settis and CE; nice and easy
    - straddict
  • 31 min, im 2. versuch
    - dersoloist
  • Oh mai - One Swordfish solved plenty of cells - three X-Wings the rest.
    - Jens
  • 26' - straight forward. I used some settis to speed up
    - Puszek
  • Settis and careful work. Not too difficult.
    - jgrab
  • 30 minutes. Standard tools. Lots of fun..
    - EddyBear
  • 39 min. Good night.
    - A B Traherne
  • Not too hard. Stepe by step - just the normal half an hour
    - gewe