is.gd/Xstefan448

X puzzle

Great fun - thanks a lot!
Standard tools, CE and an UR in G5 - J7 solved for me.

Thanks. Very nice and challenging (almost one hour). CE, 3x3-wings, a naked triple. And some X-based eliminations. A little UR appears to be unnecessary.

Stefan, please can you explain the main rules of an X puzzle; thank you!

very nice, thank you, Stefan

@hago: for the 9-field-diagonals A1-J9 and A9-J1 the same rules are valid as for columns and rows: subsequent digits in every compartment, and every digit only once.

Thank you Stefan, that was challenging pure fun without any chain.

Thank you, very nice, challenging, just a great puzzle.

@kolumbus: Thank you very much!

Nice one! The X constraint breaks the symmetry in J1, then several wings and CE, and at the end the X contraint resolves what would otherwise be a UR - this seems to be a recurring feature in this kind of puzzle.

Hi there. Can you explain me, what settis means? Thanks a lot

There is a good source of information here:
h t t p s : / / de.slideshare.net/SlowThinker/str8ts-basic-and-advanced-strategies

Thank you very much. I will watch out there

is.gd/hone448_Firebird

Thanks; an orgy of wings and higher-order creatures.

Yes, I see a lot of wings here, but am stuck at eight solved cells. One candidate in J3 quickly leads to the solution, disproving the other appears to be hard. Suggestions...?

My key was the conditional setti on 4: 4 in col 2 if and only if 4 in row H (and the only candidate in H is H9). But 4 in J is either in J2 or in J9 - thus 4 in 2A-C or 4 in 9C-F would lead to a contradiction. That was enough to start things rolling.

... after setti 3,5,6,7 and wings on 6,5,7,3 and 2, of course ...

OK, had missed the hidden pair in a column that solves another two cells and turns on a large wing which then solves. Duh, quite something!

@Jan
A hidden pair in col 1 and a 5-fish will help.

@aw
This is actually a column 5-fish in ABDFG34567.

Oops, cross posting...

aw: Interesting observation! However, I was missing the hidden pair which is required for both your observation and my large wing, both of which incidentally having the exact same eliminations of candidates as a consequence.

@morl, Jan: Indeed, after seven other fishes of order up to 4 I probably was tired and didn't see it this way - so I pulled the net around the big fish ;-)

By the way, the weekly is easily solvable without the clues in B1 and J4.

is.gd/morl_448_1

Entertaining! Settis, SI, few x-wings followed by an UR.
Thanks!

slightly more difficult than the weekly, I needed an UR argument too; thank you, morl

Thank you morl, Didn't see the UR, used a head chain instead.

Very nice, thanks! After initial Settis, the UR upper left corner helps a lot.

Quite difficult for me, but didn't Need an UR. Didn't see it anyway. Settis, SI and x-wings.

Susan: Except for one candidate in B3, AB1234 contain (6789) - this would be unresoleable from the rest of the puzzle. With that candidate, the puzzle solves easily after some settis and wings.

Can't see a useful head chain/SI, though.