SudoCue Users

1. Resolved top center 3x3 box into {2, 7}, {3, 5}, and {1, 4} pairs. 2. Found {1, 4, 9} triplet in row 3, setting r3c1 = 6. 3. Found hidden pair {1, 3} in r7c1 & r9c1, setting r8c1 = 8. 4. The "4" in column 1 lies in middle left 3x3 box. 5. r5c4 = 8 (unique horizontal); r7c5 = 8 (uniq...

Hi, Ruud! Thanks for the explanation. After posting my message this morning I went back and looked at the SudoCue log for this puzzle. I spotted the pattern by looking at columns, though. .------------------.------------------.------------------. | 23 46 1 | 2789 2689 46789| 4689 3469 5 | | 23 8 46 ...

Did anyone come up with a slick way to solve this puzzle? I can get to the solution, but I'm not very happy with the approach I used. (A "4" in r1c2 cracks the puzzle wide open. But the best method I could find to prove that r1c2 must be "4" involves ruling out the possible "...

I really like this puzzle, Ruud! With 50 of the cells resolved and 31 still to go I reached a position that contains a lot of {2, 5} pairs. There are 3 unresolved instances of the digit "4" at this stage of the puzzle, and those can be entered in two different ways. Analysis of the "r...

Hi, Ruud! I like the rsstroom reader. It's cute. This is odd, though. When I view this page using Linux the image comes up fine. But when I view it in Windows the link to the image doesn't get resolved. I don't even get a broken graphic indicator. I looked at the html source for the page, and it loo...

(How did you know there was no 8 in r5c4? I am assuming this is a typo and putting it back in.) I think you meant to say r6c4. Laura, because I had an "8" (589} at r5c4 in my original post, but no "8" at r6c4. Anyway, there are two "8"s in column 1, and 2 "8"...

Ruud has stated that all his puzzles have a unique solution. Your refusal to use techniques that utilize or exploit this fact is interesting. Hi, Keith! I'm not refusing to use such techniques -- I just used a non-unique rectangle to solve this puzzle. I have an idea, though, that there will always...

I've been going back through the archives to see what I can learn from Ruud's excellent puzzles. I had to assume the solution for this puzzle is unique in order to solve it -- I'm wondering if someone else can find the solution without making that assumption. Here's how I attacked it. After completi...

I don't see any unique rectangles at all ... Hi, Laura! I did manage to find a "unique rectangle", and I could even use it to solve the rest of the puzzle. But I didn't spot any XY-Wings, and I'm not even sure what an "Intersection Removal" is. Anyway, after making a bunch of mo...

I find it fascinating that each time we found the same weak cell, but then did different things with it. I wonder if this is a coincidence, or if there is some proof ... One thing I've noticed in a lot of puzzles with the "non-unique rectangles" is that there is often a close connection b...

From now on I have promised to stick to puzzles that I can solve within 30 minutes. That's nice. But isn't it hard to know which puzzles those are? It reminds me of what Will Rogers said about the stock market: "I only buy stocks that go up. If they're going to go down, I don't buy them!"...

This puzzle is interesting because of multiple paths to the one solution. After completing just ten squares I arrived at this position. 569 3 4569 1456 25 8 259 7 19 567 8 1 9 257 567 245 245 3 2 47 459 1345 357 1357 6 1459 8 8 5 349 37 1 2 3479 349 6 79 47 2 8 6 35 1 35 49 167 16 36 357 4 9 357 8 2...

This is another "uniquitous" puzzle. After making the obvious moves, plus some others that are not so obvious (X-Wing in the "8"s, XY-Wing rooted in r6c6, a couple of connected pairs) I arrived at this position. 79 6 1 28 5 4 3 79 28 2 8 357 13 179 179 157 6 4 379 4 357 123 178 6...

Hi, Laura! I hadn't planned to do this, but since you asked I went ahead and gave it a try. After doing the obvious stuff the grid looks like this. 24 5 147 126 79 8 369 23469 36 3 278 6 25 4 79 58 29 1 248 9 148 1256 3 16 7 246 58 1 4678 478 9 568 2 3568 367 3568 5689 678 3 14 568 14 2 679 568 2568...

This puzzle is interesting, and very hard to solve, besides. 6 . . . 4 . . . 3 . 1 . . . . . 7 . . . 5 . . . 8 . . . . . 5 . 2 . . . 3 . . . 9 . . . 2 . . . 1 . 3 . . . . . 8 . . . 9 . . . 7 . . . . . 5 . 2 . . . 3 . . . 4 Enjoy! dcb