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#825, April 12 - April 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).
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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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

 12-Apr-2026, 11:24
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by: jo

 12-Apr-2026, 15:39
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 No single number can repeat in any row or column.

Is this also true for the two diagonals?
 

by: AndreasM

 12-Apr-2026, 16:03
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 A fine puzzle that can be solved making use of a bunch of combined settis but most certainly there have got to exist other methods. Thank you for the puzzle.

@jo: Yes, it is true.
 

by: Only Human

 12-Apr-2026, 16:17
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 chain free and super fun
 

by: jo

 12-Apr-2026, 17:59
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 Wow I just discovered these hard str8ts and especially these jigsaw str8ts. You guys and girls are insane :-)

Just to make sure: The first column contains an 8 in row 8. Does that mean that the black cell in row1/col1 does not contain an 8 and so the top left jigsaw piece does not contain an 8?
Or does the black cell in the top left jigsaw piece only tells me "there is one number missing in this jigsaw piece and you must not treat this number as a white number in a black box"?
Sorry if I'm not getting something obvious.
 

by: Ben

 12-Apr-2026, 18:32
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@jo, Your second paragraph is correct. The black cell just tells you that there is a number missing from the jigsaw block (ABC123), but gives no clue as to what that digit is.

Normal Str8ts rules still apply, so:
- No digit can repeat in a row or column.
- for X, BX, and Jigsaw X, no digit can repeat in the wo major diagonals. Consecutive gray cells also count as compartments, so in this weeks JX, E5/C7/C8 cannot be 1 or 2.
- For B, BX, J, JX, no digit can repeat in a block. So, for example, in this weeks JX, you can see that E5678 contain the digits 5,6,7,8; therefore F5/F7/G5/G6 cannot contain those digits either.

A quick look at this weeks JX shows that every column contains 3, 7, 8. Therefore, you know that not only does every row contain those digits, but every jigsaw block also must contain these digits.

Good luck
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by: acs
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 The Weekly Str8ts puzzle #825
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by: acs
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 The Weekly Str8ts X puzzle #217
 

by: WolfgangL

 12-Apr-2026, 01:03
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 Just some CE, thanks!
 

by: jgrab

 12-Apr-2026, 12:05
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 9 min; just CE.
 

by: aw

 12-Apr-2026, 13:02
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 The other extreme: a really simple X-puzzle :-)
 

by: optimator

 12-Apr-2026, 13:43
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like aw, 4'
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by: acs
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 The Weekly Str8ts B puzzle #217
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by: acs
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 The Weekly Str8ts BX puzzle #217
 

by: WolfgangL

 12-Apr-2026, 00:59
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 Develops very nicely, standard tools only, thanks!
 

by: tg

 12-Apr-2026, 09:22
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 Needed a small chain towards the end...
 

by: Neunmalneun

 12-Apr-2026, 12:01
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 Very nice puzzle, thanks. In the end a short chain (based on a UR-consideration in box 8).
 

by: optimator

 12-Apr-2026, 13:31
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 pretty easy, UR like Neunmalneun to finish. Didn't need X
 

by: Ben

 12-Apr-2026, 21:00
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I loved this one. No UR or chain needed, lots of skewed wings
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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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  • 37 min im 2. Versuch mit viel Glück
    - Rot
  • Setti, 2 UR's, 3-fish, but then needed the right choice in F7 to finish.
    - MrL
  • 54'. Had to use a chain
    - Maven
  • ~40' wings, setti, 2 URs, swordfish
    - optimator
  • 50' - needed some chaining in the solver
    - COM
  • 1h/BCA.
    - H.E.
  • 16'. Settis, fishes, then just logic. Nice
    - MartinL
  • 0:50:30 schwer doch machbar
    - zoo-pony (Tartlau)
  • Only standard tools. Wings, settis, CE.
    - tg
  • 8 min.
    - Nessi
  • Nice
    - Essie
  • 35', but used two chains
    - AB Traherne
  • 60 min, zuerst unten, dann oben.
    - dersoloist
  • WC, but 1hr
    - pax
  • 43 min - row B
    - Susi
  • 40 min, settis, wings und 1*ausprobieren am Ende
    - Torsten&Irina