dailysudoku.com

Myth Jellies

I had not spotted a UR like that before. Thanks.

And I see I should have spotted the xy-wing. It was right inside of the numbers I was looking at for the solve (in fact, it is probably ...

This is yesterday's (Sept. 28th's) Nightmare:

482001000
063920000
000000000
730006900
001500000
000000305
000015000
390700001
000000083

I like this puzzle because it is so easy -- to a point.

It al ...

I am fascinated by David Bryant's and Myth Jellies' exchange, and I think I can sum up the critical distinction.

Myth Jellies wrote:
Therefore, hinges are not nishio. They are simply useful groupings ...

Wow, that was easy, and I think know now why Keith said I'd never need (not "see") a squirmbag. If you have a five level x-wing, it will contain a simpler x-wing type solve to get to the same place.

I made the observation that a swordfish is basically two interconect x-wings, and this was Keith's helpful reply:

The most basic fish is a naked single.

The next is an X-wing, in which two candida ...

I was pretty proud of spotting the finned swordfish in this puzzle becuse you had to look around so many 5 candidates to see it.

I'd be in favor of ratcheting up the definition of basic moves, too. T ...

Thanks David, I'll take a look. There was something not right about the pattern on the 2s, but I couldn't articulate it.

It took me a finned swordfish and a jellyfish to remove the 5 and 8, respectiv ...

I apologize for the technical error on the 2s (I just made a mistake with my pencil) and for the mental error on the 3s (although exercises in "fallacy" logic, which is what I did, can be instructiona ...

A transcription error. I fixed it. There is an {8} in r1c4. Thanks Marty.

... this is your puzzle! I have never come accross a puzzle more susceptible to advanced x-wing/fishy thingies and yet so impervious to solution. It is Krazydad's Insane, Book 78, Sudoku #1.

.6...... ...

Sorry, CT; I couldnt make out the link. Embarassed

I am working on a Krazydad insane right now, and it is pretty extreme...

I think that Ruud's puzzles are fairly described as nightmares from the average solvers point of view. I would say the next category after nightmares is "pros and extreme hobbyists only"... And I tota ...

CT Yankeee Wrote:

I don't know for sure, but I suspect the soduku found here are among the hardest anywhere.

Actually, CT, the puzzles here have a purposefully set difficulty limit. The are solvable ...

Thanks David. That was helpful for me, and instructive. "Spiral" is a better word than "loop" -- it implies more imagination -- and in the future I will look not only for direct links, but for links t ...

I started here:

http://www.brainbashers.com/sudoku.asp

If the super hards there aren't hard enough try here:

http://www.sudocue.net/daily.php

If the nightmare's aren't hard enough... well, wow, yo ...

David

Can you give us any insight as to how you "found" the DIC. This is how I determined that the <7> and the <9> were the numbers to be looking at, but I don't think I ever would have d ...

My two cents on when you start looking for more complicated solves:

I have done very difficult puzzles that were boring and very easy puzzles that were fascinating. As this forum demonstrates, I thin ...

Of course it's the xy-wing (doh!). Embarassed

Which is an excellent example of why I get confused by all the names and rules. I can't just apply a rule, I have to understand it on an intuitive level and ...

David

Don't give yet. I think I am seeing ALS as a way to identfy a linked group of cells without being distracted by the plethora of other cells for which the numbers in the group could be a candid ...

Well there was my problem, and it explains why some of Ruud's ALS's made perfect sense, while I couldn't grasp others. And now it all makes sense; I was stuck on ALS's in columns, rows, or boxes.

And ...