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sudoku help
   LMI Essentials -> General Discussion11 posts • Page 1 of 1 • 1
Vishal
Subject: RE: sudoku help @ 2016-03-19 3:48 PM (#21313 - in reply to #21309) (#21313) Top




Posts: 22
20
Location: India		Not all possible pencil marks were there in previous image....
Here's the link to new image: http://i66.tinypic.com/6oipnp.jpg

One more sudoku:
link: http://i66.tinypic.com/2dpb2g.jpg

Stuck in both the above sudoku...
prasanna16391
Subject: Re: sudoku help @ 2016-03-19 5:15 PM (#21314 - in reply to #21309) (#21314) Top


2021 World Sudoku+Puzzle Convention Organizer

Posts: 1784
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Location: India		For the first one, if 2 is in R5C1, it will have to be in C5 for both R4 and R9. So, 2 cannot be in R5C1.
Vishal
Subject: Re: sudoku help @ 2016-03-20 10:30 AM (#21316 - in reply to #21314) (#21316) Top




Posts: 22
20
Location: India		Thanks Prasanna
I got what you're saying....but, I want to confirm that is that a logical way?? I mean, in this case one have to assume and deduce if 2 were to come in R2C1 then after 3-4 steps it would be a contradiction...
Though I myself use the aforesaid technique but I'm not sure about its rationality.
Vishal
Subject: RE: sudoku help @ 2016-03-20 10:31 AM (#21317 - in reply to #21312) (#21317) Top




Posts: 22
20
Location: India
kishy72 - 2016-03-19 2:42 PM

Vishal - 2016-03-19 2:13 PM

Here's the link to image: http://i68.tinypic.com/34r6mpv.jpg

By the way, its LMI puzzle( Classic Set -C #132).


Image and video hosting by TinyPic

6 in R4C6 means a 6 in R1C4 or R3C4 which takes off a 6 from R8C4 .Hence for the 8th row,you have a pair (48)in R8C1 and R8C4 ---->R8C8 becomes a 6 .



Thanks Kishore
Vishal
Subject: RE: sudoku help @ 2016-03-23 6:10 PM (#21335 - in reply to #21317) (#21335) Top




Posts: 22
20
Location: India		Stuck here...anyone please guide through next steps.

dp_94
Subject: RE: sudoku help @ 2016-03-23 7:11 PM (#21336 - in reply to #21335) (#21336) Top




Posts: 25
20
Location: India		you made a mistake at R9C4 possible candidates should be 579 and 6 can not be there since 6 is already in that box but this sudoku also requires some advanced sudoku techniques like colouring, XYZ Wing,X-Y Chain. In Completion Even the world best sudoku solver's guess in such kind of puzzles they just wait a few seconds if they dont get any clue they just guess at that point some even guess multiple times.


you can try this site for better understanding of these kind of advanced techniques http://www.sudokuwiki.org/sudoku.htm

and these for practice

http://www.mindoku.com/games
http://www.sudokucup.com/
http://www.fed-sudoku.eu/enindex.php?co=vysl&tab=easy
http://www.speedsudoku.com/public.php?mode=home&no_cookies=
Vishal
Subject: RE: sudoku help @ 2016-03-24 11:26 AM (#21338 - in reply to #21336) (#21338) Top




Posts: 22
20
Location: India
dp_94 - 2016-03-23 7:11 PM

you made a mistake at R9C4 possible candidates should be 579 and 6 can not be there since 6 is already in that box but this sudoku also requires some advanced sudoku techniques like colouring, XYZ Wing,X-Y Chain. In Completion Even the world best sudoku solver's guess in such kind of puzzles they just wait a few seconds if they dont get any clue they just guess at that point some even guess multiple times.


you can try this site for better understanding of these kind of advanced techniques http://www.sudokuwiki.org/sudoku.htm

and these for practice

http://www.mindoku.com/games
http://www.sudokucup.com/
http://www.fed-sudoku.eu/enindex.php?co=vysl&tab=easy
http://www.speedsudoku.com/public.php?mode=home&no_cookies=


Thanks @dp_94.
All the things you mentioned are really helpful in giving me a boost.
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