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 stuck in this sudoku | |
| LMI Essentials -> Solving Techniques | 159 posts • Page 5 of 7 • 1 2 3 4 5 6 7 |
prasanna16391 |
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2021 World Sudoku+Puzzle Convention Organizer Posts: 1784     Location: India | |||
| Administrator |
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 Location: India | |||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | aashay - 2015-06-22 8:40 AM I also thought the same, so I reset it and solved again from scratch, but reached the same point. Here's the solution to the sudoku that you had posted with the rule(all possible arrows are marked) that apparently you seem to have missed.  I will add a few differences between the search 9 in Fed sudoku and the one in the ISC so that you don't get confused. **First and foremost a Search 9 clue in FED doesn't necessarily mean the nearest 9 in the direction of the arrow.This obviously means that there may or may not be multiple 9s in the path of the arrow.However the one in ISC indicates the distance to the NEAREST 9 . **Also since all possible arrow clues are given in FED,you can't have a digit in cell which equals the distance to 9 in any of its eight directions.This need not necessarily be the case in ISC search 9 which means there is no restriction on the cells which don't have an arrow clue. I hope it's clear. Kishore | ||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | Diminutive and simple by its appearance yet very far from that........ True or False Sudoku from Sudoku Mania by Rishi Puri aka purifire(Rules :: In the cells with clues,the actual digit is one higher or one lower or same as the clue ) The following is the tipping point of the sudoku, where solvers can decide whether to take a guess and get it done and dusted or to wait and hunt for that beautiful elusive logic which seems to be hidden somewhere deep inside. I prefer the latter and hence would greatly appreciate some form of help at this point///.I spent close to 50 mins at this stage when I started getting desperate and decided that the logic is simply out of reach. If someone could see the logical continuation from here,please do share .....  Kishore Edited by kishy72 2015-06-25 12:27 AM | ||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | |||
| debmohanty |
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 Location: India | |||
| harmeet |
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SM 2020 (Converse and Odd Even) Author Posts: 85 Location: India | |||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | |||
| harmeet |
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SM 2020 (Converse and Odd Even) Author Posts: 85 Location: India | |||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | |||
| harmeet |
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SM 2020 (Converse and Odd Even) Author Posts: 85 Location: India | |||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | |||
| gaurav.kjain |
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SM 2020 (Irregular and Outside) Author Posts: 52 Location: India | someone please help me from this step, solving this I tried finding x, y wing but no success. sorry if numbers are messed up :)  Edited by gaurav.kjain 2015-07-05 7:12 PM | ||
| akash.doulani |
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SM 2020 (Math) Author Posts: 157 Location: India | |||
| gaurav.kjain |
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SM 2020 (Irregular and Outside) Author Posts: 52 Location: India | |||
| prasanna16391 |
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2021 World Sudoku+Puzzle Convention Organizer Posts: 1784 Location: India | |||
| vopani |
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WSPC Organizer Posts: 739 Location: India | |||
| prasanna16391 |
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2021 World Sudoku+Puzzle Convention Organizer Posts: 1784 Location: India | |||
| gaurav.kjain |
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SM 2020 (Irregular and Outside) Author Posts: 52 Location: India | |||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | A Consecutive Sudoku from the US Sudoku Team Qualification round by Wei-Hwa Huang.I greatly enjoyed this very delightful set ! All the sudokus had a unique solve path and were beautifully constructed.I was more or less sprinting through the test when I hit this one and spent around 27-28 mins on this single sudoku.I adopted a very mechanical approach and found that R2C6 was the start in my case.I eliminated digits one by one in R2C6 which was very tiresome.Surely, there must be an alternative easier solve than the one mentioned.If someone has a better start,please let me know.....  Kishore Edited by kishy72 2015-09-08 12:03 PM | ||
| prasanna16391 |
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2021 World Sudoku+Puzzle Convention Organizer Posts: 1784 Location: India | What I did was, 1. Mark odds/evens. In 2nd box, there are three distinct consecutive pairs, which would take one odd and one even each, meaning two odds and one even go in the series of 3. The series of 3 cannot have 7 and so cannot have 9 either and so must be 123 or 345. Either way, 3 is part of it, and there must be groups of 6-7 and 8-9 in that box elsewhere. 2. Then, note that R3C8 to R3C7 is a series of 6 and that R1C7 = R2C6. 3. Where can 8 be in the 3rd box? Can't be in R1C8 because that is odd (using C8). Can't be in R1C7 or R2C7 because both are 3rd/4th cells of a 6-cell series (considering R1C7=R2C6. 8 cannot be in R2C8 either because that causes a 5-6 pair in 2nd box which isn't allowed going by step 1. So, 8 is at an extreme of the 6-cell series. 4. The series has to be 8-7-6-5-4-3 or 3-4-5-6-7-8. Either way, R1C7, R2C7 will form a 5-6 pair, which means 7 cannot be in R2C9 or R3C9 because 6 is taken. So, 7 must be in R2C7 and the series of 6 is done. (Consecutive.png) Attachments ----------------  Consecutive.png (14KB - 6 downloads) | ||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | |||
| prasanna16391 |
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2021 World Sudoku+Puzzle Convention Organizer Posts: 1784 Location: India | |||
| kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India | |||
| abhi265645 |
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