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is this one difficult? https://www.calcudoku.org/forum/viewtopic.php?f=19&t=289 |
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Author: | pnm [ Fri Aug 03, 2012 11:27 pm ] |
Post subject: | is this one difficult? |
I'm testing the Killer Sudoku rating. The puzzle below is supposed to be (very) difficult. Is it? (puzzle removed, please see the new one 3 posts lower) |
Author: | arjen [ Sat Aug 04, 2012 12:15 pm ] |
Post subject: | Re: is this one difficult? |
Maybe difficult but not very difficult. |
Author: | pnm [ Sat Aug 04, 2012 12:28 pm ] |
Post subject: | Re: is this one difficult? |
arjen wrote: Maybe difficult but not very difficult. Thanks :) I tried it myself as well, made a mistake somewhere , but do agree it's not very difficult. |
Author: | pnm [ Sat Aug 04, 2012 1:37 pm ] |
Post subject: | Re: is this one difficult? |
This one is supposed to be more difficult than the first one: Is it? |
Author: | clm [ Sat Aug 04, 2012 2:50 pm ] |
Post subject: | Re: is this one difficult? |
pnm wrote: I'm testing the Killer Sudoku rating. The puzzle below is supposed to be (very) difficult. Is it? (puzzle removed, please see the new one 3 posts lower) I did the first (already removed), I think in fact it's easier than the typical everyday "medium". |
Author: | clm [ Sat Aug 04, 2012 8:40 pm ] |
Post subject: | Re: is this one difficult? |
pnm wrote: This one is supposed to be more difficult than the first one: ... Is it? Yes, it's more difficult and more interesting, doable, it takes some more time in the analysis, having increased the size of the cages (six 5-cell cages, two every three columns). The key for the solution is given, in my opinion, by the cage 20 (5-cell) located in d2. |
Author: | beaker [ Sat Aug 04, 2012 11:12 pm ] |
Post subject: | Re: is this one difficult? |
pnm wrote: I'm testing the Killer Sudoku rating. The puzzle below is supposed to be (very) difficult. Is it? (puzzle removed, please see the new one 3 posts lower) The original one was very difficult for me as i tried a number of different combinations and continually got stopped about 1/2 way through the puzzle.......once you put in cages of 3 cells or more and multiples of these cages, I AM DONE.......I will probably not be able to do any with the 3 or more celled cages.....and here I thought my IQ was going to increase with the calcudoku (after all isn't that what the site tells us ) |
Author: | pharosian [ Sat Aug 04, 2012 11:42 pm ] |
Post subject: | Re: is this one difficult? |
It looked like I was going to get it fairly quickly, based on how many cells I was able to determine in columns g, h, and i. The lower left 3x3 seemed fairly straightforward as well. But then I struggled with the rest of it--even after determining the value of cell e5 in the 20+ cage clm mentioned. In the end, I got all the rows, columns, and 3x3 grids to add up to 45, but the 31+ cage starting at a1 only contained 29 (-2), and the 28+ cage starting at d2 contained 30 (+2). Can't figure out how to resolve that. So yeah. Pretty hard. |
Author: | pnm [ Sun Aug 05, 2012 12:04 am ] |
Post subject: | Re: is this one difficult? |
Great, thanks to all so far, this gives me a good idea for various parameter settings for the generating algorithm |
Author: | clm [ Sun Aug 05, 2012 8:46 am ] |
Post subject: | Re: is this one difficult? |
pnm wrote: Great, thanks to all so far, this gives me a good idea for various parameter settings for the generating algorithm Now that you have the software adjusted (and even with colours! ) it's time for you to think in also publishing a new book with only "Killer's" (other people "outside" this wonderful Calcudoku world could be very interested). I give an initial idea: 50 easy, 50 medium and 101 difficult, with the same punctuation, 3, 5 and 7 for the solutions sent to this site. |
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