dailysudoku.com

Steve — Thanks. I thought I had eliminated all possiblilities of pairs, so was moving up the echelons of complexity!

Moderation team — My profuse apologies. Unnecessarily taking up the time of ...

Help please. I am completely stuck. This is as far as I've managed to get:-

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... There is an incredibly obvious skyscraper ... Which opens up a (29, 26, 69) XY-wing in C1 R7, taking out <9> in R3C7.
I read this topic with some disbelief — they do like complicated meth ...

What you all seem to have missed is the jellyfish (order 4 x-wing) on 7s — not that it solves the puzzle more quickly, but that it is such a rarity in order 9 puzzles. It is the first order 9 jellyf ...

I have a neighbour who has defective vision, who would like an extra large printout of Sudoku puzzles. How do I print one on two, or even four sheets of A4 paper? I don't mind margins, just so lon ...

The "triple x-wing" is called swordfish. Its not very popular here, because its hard to spot ...

ravel — so that's what a swordfish is!!! Thanks for confirming that it's a legitimate te ...

This may be the toughest "Very Hard" puzzle ever! ...

Although I am not 100% sure that this technique is valid, I have used it several times successfully and can't find anything wrong wit ...

Solved it. I was too close to it and needed to move back a little!

Glassman Cool

Help, I'm stuck Sad

This is all I've managed, and that was after an unhelpful x-wing on 2s in c4 c7 eliminated the 2 at r5c5:-

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| 1235679 8 ...

Marty — Grateful thanks for your explanation of a technique new to me, but not needed here, as I solved this 19 Sept 2007 puzzle using the xy-wing on pivot r9c6 and the skyscraper on 2s (a lovely and ...

I got as far as Johan's step at the start of this topic, and then noticed a very obvious x-wing on 8s in rows 1 and 8, which simplified the puzzle considerably, and placed the 8 in box 3:-

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Unless I made a lucky error somewhere, I was able to finish with nothing more complex than a simple skyscraper on 8's (C59) which took out the 8 in R4C7.
cgordon — Thanks for introducing me to skyscr ...

This 12x12 is a real beauty. I found it very tough without any pencil marks or other memory aids, but managed it in the end. It had me purring with contentment on several occasions. I think the ...

Tracy — Thanks, I've found it.

Glassman Cool

... There is an XY-Wing with pivot R1C6 that removes <4> from R6C9, leading immediately to <3> at R4C1. ...

Asellus — Thanks for that. I had done a little more housekeeping with a cou ...

I'm completely stuck on this — I haven't even got as far as Captain Pete. How did he do the eliminations in c7?

This is my feeble effort. Enlightenment please!

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Having trouble with this. I solved it and proved uniqueness by starting at the derived end of the only non-trivial pair on the grid. Whichever way around I started this pair, the cell in between c ...

Steve — Thanks. I found this in a most unexpected source, last week's Radio Times. Most are easy, but every now and again the RT includes a gem that makes your head hurt!

This xy-ring just leap ...

If you have corners of a rectangle with candidates (ab), (bc), (cd), and (da), there are only two possible solutions. These will eliminate all other b's on side 1, c's on side 2, d's on side 3, and ...

Keith — I got side-tracked when I realised that your xy-wing eliminated the 1s at r2c1 and r2c3. That 57 was too tempting a prize not to be of use.

Mogulmeister — I prefer yours as a simple xy-w ...