SudoCue Users

I don't see how you got to the point of knowing there were 2 red coloured candidates in row 1. I have to admit I didn't spot this right at first, but now that Ruud has pointed it out I think it's pretty slick. A new kind of formation! Thanks, Ruud! There are only three places for a "7" in...

Can someone explain what Leo said? I don't speak Dutch, and I can't read it, either. Shah, the best I can do is concentrate on the connection between the "9"s and "5"s in this puzzle. Setting r5c9 = 9 cracks the puzzle wide open. Ruling out the possibility of a "9" at r...

Hi, all! I just posted a description of an interesting way to solve this puzzle over on the Daily Sudoku site. Since it doesn't rely on coloring I thought I'd also post it here. Using only the standard techniques I arrived at this position: 2 149 59 149 159 3 6 7 8 3457 134 357 6 158 248 13 24 9 6 1...

I'm not sure this is a new technique. But in the course of solving today's "Nightmare" I hit an interesting formation -- I'm not sure I've ever encountered one exactly like it before. With 45 cells resolved and 36 still to go the puzzle looked like this (I had only made the obvious moves u...

So I write this on paper like this: (And here is where I am wondering if what I am doing is colouring, but I think not.) This step in your explanation is the technique most people call coloring. In this particular case the simple coloring doesn't gain you any new information, but it does emphasize ...

(Faster ways to do the jan 23rd also most welcome.) I sweated over this one for a while before I noticed something. After filling in 15 cells and doing some coloring I arrived at this position. 34 5 1 7 6 8 34 9 2 2 6 7 39 39 4 8 5 1 8 39 349 12 5 12 36 46 7 34 8 2 136 13 9 1567 167 45 9 34 5 1236 ...

Thanks for the quick response, Laura.

I'll have to think about what you said for a little bit. Maybe I'll have to read your "novel" again. Give me a day or two to puzzle it out ... I probably won't need the long-winded explanation, but you never know.

Have a great day! dcb

Hi, Ruud! I downloaded and installed the SudoCue program today. I had a couple of small problems, and thought you might like to hear about them. I'm dividing my time between Windows and Linux these days. So I tend to forget a couple of things that a regular Windows user might not overlook. Anyway, I...

Hi, all! I thought this puzzle was difficult, but maybe not as much fun as some of the other nightmares I've worked through. After finding a two-step XY-Wing in boxes 4 & 7 (the first one revealed the second one) and doing quite a bit of coloring I spotted a pattern (136 / 36 / 36 / 36) in r1c4,...

Hi, Lac! I don't think you're confused ... if you solved this puzzle, you have quite a head on your shoulders, no matter how you did it! No doubt there are many roads to the one solution. :) After I had filled in 19 cells, with 27 left to go, my copy of the puzzle looked like this. (None of the move...

Hello! I'm new to this forum ... this is my first post. I really liked this puzzle, Ruud. It had me scratching my head for quite a while. When I finally reduced the possibilities for the digit "6" to just 19 cells (I had to use coloring and a swordfish to get there) the solution became obv...