SudoCue Users

MJ, Thanks for your comments, suggestions, and insight. It would have been more decent of me to acknowledge your treatise on AIC's, which I had seen a few months earlier. My excuse is that I didn't bookmark the link and I couldn't seem to find it quickly. I recently found it, and included it in anot...

istvan, I'm not the most authoritative forum member to answer you, but take this for what it's worth. It's happened to me many times -- when I make successive eliminations of the same digit based on empty rectangles, in retrospect I often find that there is a single fish structure that would have yi...

While plodding through the archives I found an interesting position in the March 30, 2006 Nightmare. Although I didn't come across the exact position below, which arises in Sudocue's solution, I'll use it since it illustrates the same points. One point of interest is that it provides an example whic...

While slowly working through the archives I decided to skip ahead to this one, since it figured to be challening if David found it tough. Indeed it was. I'm posting my solution since I came across what I expect is a rare configuration -- a continuous, cyclic XY chain. After some quick research on an...

Again, this puzzle is long forgotten, I'm sure, but while looking at this thread I saw the answer to the question Keith posed. +----------------------+----------------------+----------------------+ | 4 369 379 | 269 5 1 | 27 69 8 | | 69 1 79 | 269 8 4 | 3 5 27 | | 2 8 5 | 369 7 369 | 1 4 69 | +-----...

I realize this puzzle is long forgotten by this time, but I'm slowly working through the archives and consulting the forum for possible posts on any puzzles I've found interesting or more difficult than usual. Like some others, I found this one more time consuming than most Nightmares, so I'm happy ...

I agree with David's choice of "XY Chains"

Ron Moore

David, I'm like you in that it's still difficult for me to identify really useful "ALS XZ rule" configurations. For the simpler configurations (meaning the ones that I have some chance of spotting in practice), in most cases in one or the other of the two sets, there will be only one occur...

Laura, I'm relatively new on the forum and I am slowly working my way through the archive. I did not solve the Dec 31 nightmare using multi-colored chains, but I will express my comment in the context of what you did. For convenience I've copied below the second position you give in the solution for...

Generally I found the ALS Nightmares very difficult, but solvable. I want to comment on the Sept 4 Nightmare, as I found a somewhat simpler solution than what Sudocue found. .-----------------.------------------.------------------. | 1256 8 A15 | 26 59 7 | #129 4 3 | | #126 7 4 | 268 3 689 | 1289 B1...

As it happens, while browsing through the site shortly after my post above, I came across another example which Myth Jellies points out in this post: http://sudocue.net/forum/viewtopic.php?t=194 . By the way, David, I've seen many fine posts by you and you're familiar with some techniques that are n...

I just joined the forum, so I'm aware that this is very old business. I wouldn't have commented except that the solving guide states that no XYZ wing resulting in two eliminations had been discovered in practice. Well, here is one. r8c8 (pivot), r5c8, and r8c7 form the XYZ wing pattern (no need to c...