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 Post subject: Long Gattai-11
PostPosted: Thu Oct 28, 2010 5:01 am 
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Joined: Tue Oct 26, 2010 6:08 am
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Image

Gattai-11 No.001:
Code:
000000012000056004000070000000300000065000000080000000000000000100000000250000000
300000012000000006000000000000000000000000000000000000000000000800000000130000000
000000037000000009000000000000000000000000000000000000000000000600000000190000000
000000029000000005000000000000000000000000000000000000000000000300000000180000000
000000098000000003000000000000000000000000000000000000000000000700000000960000000
000000048000000006000000000000000000000000000000000000000000000500000000310000000
000000094000000003000000000000000000000000000000000000000000000700000000130000000
000000065000000008000000000000000000000000000000000000000000000400000000620000000
000000026000000005000000000000000000000000000000000000000000000900000000250000000
000000095000000006000000000000000000000000000000000000000000000400000000250000001
000000036000000005000000000000000090000000460000001000000030000600120000470000000


http://puzzle.gr.jp/show/English/NPProblems/Image/Gattai-11


Last edited by ton on Tue Nov 02, 2010 7:27 am, edited 2 times in total.

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 Post subject: Re: Long Gattai-11
PostPosted: Thu Oct 28, 2010 9:14 am 
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Again thanks for an interesting puzzle.
Can you please explain what the POINTS specified for each puzzle indicate.
The HINTS are of course the number of given digits.


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 Post subject: Re: Long Gattai-11
PostPosted: Thu Oct 28, 2010 10:28 am 
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Børge wrote:
Can you please explain what the POINTS specified for each puzzle indicate.


The POINTS is difficulty of problem.

difficulty of problem = sum( difficulty of phase )
difficulty of phase = 1 / sum( 1 / difficulty of technique )
difficulty of technique = sum( difficulty of information )
difficulty of information = 1 or 2 or 3

difficulty of information
Please exclude the candidate of Number from all cells in the line that blocks, and relate relates and the relating column if Number is put in the cell.
Candidate elimination from cell is difficulty point 1.
Candidate elimination from block is difficulty point 2.
Candidate elimination from row or column is difficulty 3.


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 Post subject: Re: Long Gattai-11
PostPosted: Thu Oct 28, 2010 8:47 pm 
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I have printed this one out on a DIN A3 sheet and started solving it. Got 11 digits so far.
Very interesting puzzle. It does not seem to require any difficult techniques, but a lot of extremely forward looking combined intersections. 8-)
Using this "technique" I could place g4r5c5 as the very first solution. :D

EDIT @enxio27:
I can't be 100% sure yet but, I am now pretty sure that this puzzle does not require pencil marks at all.
Only (long) forward looking (combined) intersections, i.e. pure logic.
So doing it on a LETTER or A4 printout should not be a problem.


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 Post subject: Re: Long Gattai-11
PostPosted: Tue Nov 02, 2010 9:07 pm 
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Børge wrote:
EDIT @enxio27:
I can't be 100% sure yet but, I am now pretty sure that this puzzle does not require pencil marks at all.

Cool! I'll give it a shot without pencil marks, then.


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 Post subject: Re: Long Gattai-11
PostPosted: Fri Nov 12, 2010 6:20 pm 
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Børge wrote:
I am now pretty sure that this puzzle does not require pencil marks at all.

Unfortunately, I couldn't manage more than one solved cell without pencil marks. I'm now on my third try through the puzzle--I keep finding mistakes in my pencil marks. This time I used SudokuSolver's Double-Doku puzzle type to help with the pencil marks. I still have to do some manual work (since SS doesn't handle "Undecuple-Doku" or even "Quintuple-Doku"), but I'm hoping that I've now eliminated all the mistakes.


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