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Puzzle Solving Techniques
   LMI Essentials -> Solving Techniques74 posts • Page 3 of 3 • 1 2 3
debmohanty
Subject: Re: Puzzle Solving Techniques @ 2015-08-30 3:17 PM (#19204 - in reply to #19202) (#19204) Top



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kishy72 - 2015-08-30 2:49 PM

A Numberlink puzzle.I realized that this puzzle has many ways of completing itself.Where am I going wrong?

This was a broken puzzle (I suppose you have taken this from one old LMI test)


Talking about Numberlink in general, this write up (Numberlink Primer) by Palmer will be an eye-opener for most.
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-08-30 3:35 PM (#19205 - in reply to #19204) (#19205) Top




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This was a broken puzzle (I suppose you have taken this from one old LMI test)


Ah! I see.....It was taken from Nikoli Selection 2010 LMI monthly test.

Talking about Numberlink in general, this write up (Numberlink Primer) by Palmer will be an eye-opener for most.


Thanks a lot Deb!I will look through this primer.
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-08-31 6:45 PM (#19209 - in reply to #19205) (#19209) Top




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I ran into some problems in the following Hitori puzzle with just a few steps away from completion.Despite being so close,I fail to see a logical continuation here. Can someone post the solution ?

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Edited by kishy72 2015-08-31 7:10 PM
swaroop2011
Subject: Re: Puzzle Solving Techniques @ 2015-08-31 8:07 PM (#19210 - in reply to #19209) (#19210) Top


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kishy72 - 2015-08-31 6:45 PM

I ran into some problems in the following Hitori puzzle with just a few steps away from completion.Despite being so close,I fail to see a logical continuation here. Can someone post the solution ?



one quick next step: R1C2 will be shaded.
Reason: Either of R8C1 or R8C2 will be shaded so that means R7C2 is unshaded in any case. Hence above step.
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-08-31 9:36 PM (#19211 - in reply to #19210) (#19211) Top




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swaroop2011 - 2015-08-31 8:07 PM

kishy72 - 2015-08-31 6:45 PM

I ran into some problems in the following Hitori puzzle with just a few steps away from completion.Despite being so close,I fail to see a logical continuation here. Can someone post the solution ?



one quick next step: R1C2 will be shaded.
Reason: Either of R8C1 or R8C2 will be shaded so that means R7C2 is unshaded in any case. Hence above step.


Thank you ! I failed to see the 7 getting trapped.Done with the puzzle.
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-09-02 1:42 AM (#19216 - in reply to #19211) (#19216) Top




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A very difficult Hitori Puzzle ! Can someone please post the continuation here where I am stuck?
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Edited by kishy72 2015-09-02 1:43 AM
swaroop2011
Subject: Re: Puzzle Solving Techniques @ 2015-09-02 2:18 AM (#19217 - in reply to #19216) (#19217) Top


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hi,
can you share the original puzzle link ?
I am confused whether what you have circled or not.
E.g. Is R6C5 "4" clue circled or not ?
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-09-02 2:59 AM (#19218 - in reply to #19217) (#19218) Top




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swaroop2011 - 2015-09-02 2:18 AM

hi,
can you share the original puzzle link ?
I am confused whether what you have circled or not.
E.g. Is R6C5 "4" clue circled or not ?


Sorry.You are right.It's not something which I deduced logically.I forgot to erase it.
ashaash11ash
Subject: Re: Puzzle Solving Techniques @ 2015-09-02 8:57 AM (#19219 - in reply to #1525) (#19219) Top


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R6c5 "4:" clue should be unshaded only.
ashaash11ash
Subject: Re: Puzzle Solving Techniques @ 2015-09-02 9:18 AM (#19221 - in reply to #1525) (#19221) Top


Snakes (PR 2015/16) Author

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If u see all the digits above and below the numbers at R7C5/7/9/11. for each number the digits above and below is same.. so if R6C5 is shaded then for the other numbers if any of the above or
below clue is shaded the white cells get closed at top
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-09-02 12:27 PM (#19225 - in reply to #19221) (#19225) Top




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ashaash11ash - 2015-09-02 9:18 AM

If u see all the digits above and below the numbers at R7C5/7/9/11. for each number the digits above and below is same.. so if R6C5 is shaded then for the other numbers if any of the above or
below clue is shaded the white cells get closed at top


Indeed.I missed this totally.The puzzle is still very sticky even after this deduction.But it helped a lot and I completed it .Thanks.
puzzleduniya
Subject: RE: Puzzle Solving Techniques @ 2015-09-22 2:45 PM (#19441 - in reply to #1525) (#19441) Top





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Just gone through the puzzle solving techniques. It's just amazing and very knowledgeable. I have learned a lot from it.
kishy72
Subject: Re: Puzzle Solving Techniques @ 2015-12-22 6:58 PM (#20328 - in reply to #1525) (#20328) Top




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The incorrectly done Mochikoro puzzle where all islands are not connected solved in the last few mins of the test .Apparently,there are ways one can gain points by solving incorrectly too !

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Edited by kishy72 2015-12-22 6:59 PM
prasanna16391
Subject: Re: Puzzle Solving Techniques @ 2015-12-22 11:24 PM (#20332 - in reply to #1525) (#20332) Top


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I too gained points by solving incorrectly, in a more indirect way. I solved the Japanese Sums 25 pointer incorrectly by placing a digit by mistake where it shouldn't be, which enabled me to reach an incorrect solution and move to the 105 pointer much faster than I would have if I had solved correctly. Considering I solved the 105 pointer with 1 minute to spare, I'd say the mistake gained me 80 points
swaroop2011
Subject: Re: Puzzle Solving Techniques @ 2015-12-22 11:54 PM (#20333 - in reply to #20332) (#20333) Top


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kishy72 - 2015-12-22 6:58 PM

The incorrectly done Mochikoro puzzle where all islands are not connected solved in the last few mins of the test .Apparently,there are ways one can gain points by solving incorrectly too !

Image and video hosting by TinyPic



prasanna16391 - 2015-12-22 11:24 PM

I too gained points by solving incorrectly, in a more indirect way. I solved the Japanese Sums 25 pointer incorrectly by placing a digit by mistake where it shouldn't be, which enabled me to reach an incorrect solution and move to the 105 pointer much faster than I would have if I had solved correctly. Considering I solved the 105 pointer with 1 minute to spare, I'd say the mistake gained me 80 points


haha interesting things.
brecher92
Subject: Re: Puzzle Solving Techniques @ 2016-01-28 8:02 PM (#20841 - in reply to #1525) (#20841) Top




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Not sure where this question belongs, but I'm curious how much time a competitive puzzler might typically take to double-check their entries of the answer key during a timed competition. I just lost 78 points in GP Round 1 because I didn't double-check my entries. Do most people always set aside time at the end to double-check? Or after each puzzle? Or just continue to plow through the remaining puzzles and hope for the best?
prasanna16391
Subject: Re: Puzzle Solving Techniques @ 2016-01-28 10:16 PM (#20842 - in reply to #1525) (#20842) Top


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For me I just plow through and hope for the best. My accuracy has improved in general with more experience though.
rajeshk
Subject: Re: Puzzle Solving Techniques @ 2016-01-31 12:09 AM (#20864 - in reply to #20842) (#20864) Top


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I could not proceed much Logical in this Fillomino Stars puzzles. Please do help me to get any logical continuation to this puzzle.
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Edited by rajeshk 2016-01-31 12:17 AM
kishy72
Subject: Re: Puzzle Solving Techniques @ 2016-01-31 9:49 PM (#20870 - in reply to #20864) (#20870) Top




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rajeshk - 2016-01-31 12:09 AM

I could not proceed much Logical in this Fillomino Stars puzzles. Please do help me to get any logical continuation to this puzzle.
Image and video hosting by TinyPic


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You are missing a crucial deduction here just like I did when I solved it before .

1) R4C1 can't be a star .If it is a star,R3C1 can't be filled by anything.
2)Following the earlier deduction ,you have R5C2 not being a star.If it's a star,R4C2 can't take any digit 1,2 or 3.
3)Now we have R5C4 as a star as otherwise Rows 4 and 5 can't take a total of 4 stars.

Just a suggestion.Please post bigger images next time so that people find it easy to look where you are stuck : )

Edited by kishy72 2016-01-31 9:51 PM
kishy72
Subject: Re: Puzzle Solving Techniques @ 2016-01-31 9:54 PM (#20871 - in reply to #1525) (#20871) Top




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By the way,the bottom 3's can't yet be connected(logically).This image was taken from the same stuck puzzle posted earlier in LMI.

http://logicmastersindia.com/forum/forums/thread-view.asp?tid=126&s...
brecher92
Subject: Re: Puzzle Solving Techniques @ 2016-03-02 6:32 AM (#21172 - in reply to #1525) (#21172) Top




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Could someone point me in the right direction on Kropki #39 from the WPF GP Round 2? I'm not an expert on this puzzle type, so I'm sure I'm missing some elementary logic here, but I've gotten absolutely nowhere on this.
kishy72
Subject: Re: Puzzle Solving Techniques @ 2016-03-16 1:25 AM (#21280 - in reply to #1525) (#21280) Top




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Encountered this frustratingly irritating Linesweeper variant that plays around with the rules in the Loop PR round.I couldn't complete it during the test (and even later), discarded it in a corner and totally forgot about it until I saw it creeping up in the LMI fun contest again.So I decided to clear up this puzzle once and for all .I continued until this point unsure of whether it is right or wrong.Could someone post the steps until the end?

What is the logic for solving this particular puzzle other than the obvious ones at the lower right and top left and the not so apparent top right ?

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Edited by kishy72 2016-03-16 1:26 AM
swaroop2011
Subject: Re: Puzzle Solving Techniques @ 2016-03-16 2:10 AM (#21281 - in reply to #21280) (#21281) Top


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kishy72 - 2016-03-16 1:25 AM

Encountered this frustratingly irritating Linesweeper variant that plays around with the rules in the Loop PR round.I couldn't complete it during the test (and even later), discarded it in a corner and totally forgot about it until I saw it creeping up in the LMI fun contest again.So I decided to clear up this puzzle once and for all .I continued until this point unsure of whether it is right or wrong.Could someone post the steps until the end?

What is the logic for solving this particular puzzle other than the obvious ones at the lower right and top left and the not so apparent top right ?



Firstly, your bottom left part is wrong. I don't know how you got that.
These are starting steps, which i followed. I hope it helps.
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prasanna16391
Subject: Re: Puzzle Solving Techniques @ 2016-03-16 2:37 AM (#21282 - in reply to #1525) (#21282) Top


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I thought the top right counts as obvious, since there is no other way to satisfy the double 4. Swaroop has the intended start.
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