SudoCue Users
A forum for users of the SudoCue programs and the services of SudoCue.Net

Author Message
Nick
New kid on the Grid

Joined: 14 Nov 2006
Posts: 3

 Posted: Tue Nov 14, 2006 6:14 pm    Post subject: Sumocue hints Please explain "Elimination in inner-outie differences in Box..." I don't understand/can't work this out. I'm doing the latest Assassin Killer and looking at Box 2 Thanks
Ruud
Site Owner

Joined: 30 Dec 2005
Posts: 601

 Posted: Tue Nov 14, 2006 7:37 pm    Post subject: Hi Nick, here (I think) is the situation where you will first encounter an innie-outie difference in nonet 2: The 2 green cells are the outies. The red cell is the innie. The sum of the 3 cages covering nonet 2 is 43, so the 2 green cells together must be 2 less than the single innie. The minimum value for the 2 outies is 3 (1+2), so the innie must be at least 5. You can eliminate digits 1 through 4 in the innie. The maximum value for the innie is 9, so the 2 outies together can be a maximum of 7. This means that neither of them can be higher than 6. You can eliminate candidates 7 through 9 from these 2 cells. Hope this helps you understand the technique. Ruud_________________“If the human brain were so simple that we could understand it, we would be so simple that we couldn't.” - Emerson M Pugh
Nick
New kid on the Grid

Joined: 14 Nov 2006
Posts: 3

 Posted: Wed Nov 15, 2006 8:07 pm    Post subject: Sumocue hints Ruud - thanks for reply to my question on innie-outie differences on the latest Assassin Killer I'm still trying to get my head round this and seem to have a mental blockage! Could you run through Nonet 3 and Nonet 7 innie-outie difference for me as well? With a couple more examples it may well click for me - I seem to react intuitivelyto these kind of problems if I have more examples Many thanks Nick
emm
Hooked

Joined: 11 Oct 2006
Posts: 34

 Posted: Wed Nov 15, 2006 11:13 pm    Post subject: Hi Nick Here’s how I look at it. Total for N3 = 45 = 27 + 18 - outies + innies. => 45 = 45 - r4c8 + r13c7 (in this case the 1 outie = the 2 innies) From this you can make eliminations : The min possible for any two cells (the innies) is 3 => the min for the outie also = 3 => r4c8 <> 1 or 2 and you can eliminate them as candidates Conversely, the max possible for any one cell (the outie) is 9 so you know that the max possible for the 2 innies is also 9. ------------------------------------------------------------------------------------- Total for N7 = 45 = 22 + 24 - r6c1 (outie) + r7c23 (innies) => 45 = 46 - r6c1 + r7c23 => r6c1 = 1 + r7c23 ( in this case the outie = the 2 innies +1) The max for the outie = 9 => max for the innies = 8 => r7c23 <> 8 or 9 and you can eliminate them as candidates The min for the innies = 3 => min for the outie = 4 => r6c1 <> 1 or 2 or 3 and you can eliminate them as candidates
Nick
New kid on the Grid

Joined: 14 Nov 2006
Posts: 3

 Posted: Fri Nov 17, 2006 5:24 pm    Post subject: Sumocue hints Ruud Many thanks for your help - I think I am beginning to get the hang of it now. I love killers, having polished off the Times Killer Sudoku book, and finishing the Sudokulist Extreme Killer each week in fairly quick time. Strange how one gets a mental blockage sometimes! Nick
 Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First
 All times are GMT Page 1 of 1

 Jump to: Select a forum SudoCue - the Website----------------Daily Sudoku Nightmare & ArchiveClueless SpecialsClueless ExplosionsWeekly AssassinsTexas Jigsaw KillersSudoku LiteX-FilesDaily WindokuDaily Jigsaw SudokuSolving Guide & GlossarySamurai ContestGeneral Website Comments Sudoku - the Community----------------Help Me! I'm stuck!Solving Techniques & TipsWebsitesSoftwarePuzzlesPublicationsOff-Topic SudoCue - the Software----------------SupportWishlistCommentsReleases
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum