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#800, October 19 - October 25:
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.
All Access Supporters can load all puzzles from number 1.
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Puzzles 1 to 250 are available as Puzzle Packs, just $5.49.

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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No full solutions please!

by: kmr

 19-Oct-2025, 19:32
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Like Martiuns. I used a head chain to finish. Really enjoyed it.
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by: kmr

 19-Oct-2025, 19:28
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Like Martinus. I used a (pretty skewed) head chain to finish.
 

by: kmr

 20-Oct-2025, 19:28
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Was meant for the BX puzzle.
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by: hepa

 19-Oct-2025, 10:59
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4
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8
 

by: kris

 19-Oct-2025, 12:20
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 Very nice, develops smoothly without chains, a bit easier than ususal. Thanks hepa!
 

by: BP

 19-Oct-2025, 19:08
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 Like kris, very enjoyable. Many thanks.
 

by: OneGuess

 20-Oct-2025, 12:07
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 chain free - but still took me ages to spot all the steps. So, easier means easy in relative terms - in absolute terms: enjoyable 5 star
 

by: Hel

 20-Oct-2025, 14:36
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 Like OneGuess, Thanks hepa!
 

by: Cosmanita

 21-Oct-2025, 15:18
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 Where to continue after 11 solved numbers? I can not spot the next step.
 

by: OneGuess

 21-Oct-2025, 21:41
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 @Cormanita: box setti 8 (leads to single 8) and feel free to check what happens, if 2 would be missing in row G (short head chain), then setti 2
 

by: kris

 22-Oct-2025, 20:31
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@Cosmanita: I can only guess which 11 cells you solved, but I have an assumption – very helpful were box settis (all boxes have to contain 4,6 and 8, OneGuess's hint), and a box wing on 2, which excludes 2 from A7 and C9 and so from C4–9.
@OneGuess: I didn't note all my steps, but I am quite sure that a head chain was not needed, just tools and VCE.
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by: acs
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5
 The Weekly Str8ts BX puzzle #192
 

by: Martinus

 19-Oct-2025, 08:52
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 Pure fun. Start with CE in box 1. Then settis and an easy to spot chain in the end. Great! Thanks!
 

by: BP

 19-Oct-2025, 13:35
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 Very enjoyable, used a very skewed xwing to finish.
 

by: optimator

 19-Oct-2025, 19:29
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 not hard, with short chain to finish
 

by: ThomasF

 23-Oct-2025, 10:40
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like optimator
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by: acs
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5
 The Weekly Str8ts X puzzle #192
 

by: Cosmanita

19-Oct-2025, 08:43
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 Hard one for me, only possible with chains. Only one option in the upper left corner was working at the end. A1 not 2 SI, A1 not 4 long chain with setties and /, D1 not 4 long chain ending in column 6. Anyone a shorter solution?
 

by: hago

 19-Oct-2025, 09:25
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 Mx solution: finding 6 in column 3
 

by: charliepat

19-Oct-2025, 11:44
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 Many thanks for the hint, hago! After finding 6 in col 3, it becomes quite easy
 

by: jgrab

 19-Oct-2025, 12:07
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 I also needed chains. I tried to find the right place for 8 in row E; the rest was easy.
 

by: optimator

 19-Oct-2025, 19:46
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 I made a lucky guess for E5 and solved it
 

by: Maven

 20-Oct-2025, 12:53
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 For me very careful elimination in box 6 (paying careful attention to box 5) was key and opened it right up.
 

by: Maven

 20-Oct-2025, 12:54
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Sorry.. this wads for the B puzzle!
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by: acs
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 The Weekly Str8ts B puzzle #192
 

by: optimator

 20-Oct-2025, 01:21
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 6'
 

by: Cosmanita

 20-Oct-2025, 18:29
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 Nice one, B-Power solves it.
 

by: ThomasF

 23-Oct-2025, 11:00
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10' B tools only
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by: acs
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 The Weekly Str8ts puzzle #800
 

by: hp

 19-Oct-2025, 12:53
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2
 not that easy but nice
shortest path for me was:
not easy to spot two singles 9, setti 5,2,8,7 and finally Setti 6
 

by: jgrab

 19-Oct-2025, 21:48
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 If A6=9, UR A78/C79/E89.
 

by: Jan

 19-Oct-2025, 22:17
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 hp put it very succintly. Instead of the setti 6, setti 3 and the resulting x-wing on 1 also solve.
 

by: Martinus

 20-Oct-2025, 06:40
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Like hp and Jan. Thanks!
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Page created on 27-June-2010.
All puzzles not marked 'guest compiler' on this site are trademarked and cannot be reproduced without permission.
Copyright Jeff Widderich and Andrew Stuart @ Syndicated Puzzles, Privacy, 2007-2024
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  • A8: 4 ja oder nein?
    - biggi
  • Of course, G1 und H1 und J1 ? Bin mit dem Dämelsack geschlagen.
    - barbara
  • Bitte,was sind GHJ 1?
    - barbara
  • b*k*: 😘
    - Biggi
  • für biggi, wiederhole mich gerne :-) bei soviel Auswahl nimm J2
    - b*k*
  • setti 7? ich hab FGHJ1236 für die 7, kriegs nicht gebacken..
    - biggi
  • to easydoesit: J2
    - b*k*
  • 54 min. setti on 7, then setti on 4 were the keys
    - Alex
  • Pls, is 7 in F or H 2?
    - easydoesit
  • Thanks for the helps. A really biest, many hours spent, for me a little bit too hard for fun
    - b*k*
  • Dersoloist - Danke!
    - barbara
  • H4 is 9 und so wie ich das sehe muss col1 ja eine 8 haben
    - dersoloist
  • And, please, is the 9 auf H1 or H4? and has col 1 an 8?
    - barbara
  • Yes, B5 = 7.
    - Jürgen
  • 2h
    - JulioFlor
  • Danke!
    - barbara
  • Yes.
    - Aubinger
  • i need help, too! Please, is B5 7 ?
    - barbara
  • 'I need help!!!!
    - Eumel
  • doch noch geschafft, mit viel glück.weil ein system hatte ich nicht.
    - dersoloist
  • 40" after several tries what a biest. swordfish,settis,sworffish, settis.......
    - Bassam
  • about 45 min. A very satisfying puzzle how it comes apart. One UR undid it rather quickly.
    - puzzled
  • It was hard for me, but I did it.
    - H.E.
  • I get stuck evertime I try a new chain, I don't mind chaining, but this time I need a help pls.
    - easydoesit
  • 2h, like Jan.
    - UZ
  • 20' swordfish, settis, swordfish, settis
    - optimator
  • 51:41 - a lovely one
    - Latimer
  • 43'. Lots of settis and a CE
    - Maven
  • 43' with a little break. X-wings + settis. This was fun!
    - Puszek
  • 36 min logic
    - Clemeau
  • 2h, sehr schwer und interessant. Der Schlüssel lag in D9. Viele Settis und x-wings. Danke.
    - S. Walt
  • 49 min - mit den Tipps von hp
    - Rot
  • 18 min - a fantastic puzzle
    - Nessi
  • A lot of little steps until it surrenders, mainly settis or the equivalent wings
    - Jan
  • 44 min - what a mess! But finally done it. I am not often proud of myself, but this time: YEAHHH
    - Susi
  • 45' like Emma
    - ThomasF
  • 53' with some pauses. Settis, careful elimination, X-wing. Very nice, no chain, just logic
    - Emma
  • 44' - nice mix of tools needed
    - COM
  • 41' WC
    - Hel
  • 50 min. - settis, URs wings very nice one
    - Nessie
  • Developing slowly, starting with 9 and CA of upper right corner, UR, wings...
    - MrL
  • 1:06:03 schwer aber schön.
    - zoo-pony (Tartlau)
  • 47‘
    - Greg
  • 19 min., settis and wings do it
    - flowerwaffle
  • 25 min, settit, wings, URs
    - Torsten&Irina
  • Filling Cells, Settis, 1 X-Wing, Careful Elimination.
    - Solver_2
  • A nice challenge. Some Settis, and a UR in between (upper right corner).
    - jgrab