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| bart
| Joined: 11 Aug 2005 | Posts: 46 | : | | Items |
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Posted: Tue Aug 30, 2005 10:00 pm Post subject: Pairs |
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I'm sorry if this is a stupid question (on this BB it probably is )
from Simple Sudoku
from copy/paste:
Code: |
*-----------*
|4..|.7.|8..|
|..1|5..|...|
|9..|.8.|.31|
|---+---+---|
|...|..4|.5.|
|7..|...|..2|
|.5.|3..|...|
|---+---+---|
|18.|.2.|..3|
|...|..5|9..|
|..3|.9.|..4|
*-----------*
*-----------*
|4..|.7.|8.5|
|8.1|54.|...|
|975|.8.|431|
|---+---+---|
|3..|..4|.5.|
|7..|.5.|3.2|
|.5.|3..|...|
|---+---+---|
|189|42.|5.3|
|.47|.35|9..|
|5.3|.9.|..4|
*-----------*
{4} {236} {26} {1269} {7} {12369} {8} {269} {5}
{8} {236} {1} {5} {4} {2369} {267} {2679} {679}
{9} {7} {5} {26} {8} {26} {4} {3} {1}
{3} {1269} {268} {126789} {16} {4} {167} {5} {6789}
{7} {169} {468} {1689} {5} {1689} {3} {14689} {2}
{26} {5} {2468} {3} {16} {126789} {167} {146789} {6789}
{1} {8} {9} {4} {2} {67} {5} {67} {3}
{26} {4} {7} {168} {3} {5} {9} {1268} {68}
{5} {26} {3} {1678} {9} {1678} {1267} {12678} {4}
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from SS-file:
Code: |
*-----------*
|4..|.7.|8..|
|..1|5..|...|
|9..|.8.|.31|
|---+---+---|
|...|..4|.5.|
|7..|...|..2|
|.5.|3..|...|
|---+---+---|
|18.|.2.|..3|
|...|..5|9..|
|..3|.9.|..4|
*-----------*
I673
I134
I244
I405
I725
I605
I085
I205
E64007
E73017
I197
I098
I569
E64002
E65012
E64006
E65016
I644
I657
I574
I273
I423
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or just the screenshot:
Now, I've noticed I can safely delete candidates 2 and 6 in the cells that are on the "crossroads" (in green) of the pairs (in blue)
can you always do this? or is it just coincidence? |
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| angusj Site Admin
| Joined: 18 Jun 2005 | Posts: 406 | : | | Items |
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Posted: Tue Aug 30, 2005 10:22 pm Post subject: Re: Pairs |
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bart wrote: | can you always do this? or is it just coincidence? |
It's almost certainly a coincidence.
(I certainly wouldn't use this as a 'technique' unless you could find a proof of its certainty.) |
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| bart
| Joined: 11 Aug 2005 | Posts: 46 | : | | Items |
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Posted: Tue Aug 30, 2005 10:36 pm Post subject: Re: Pairs |
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angusj wrote: | It's almost certainly a coincidence. |
I thought so
angusj wrote: | (I certainly wouldn't use this as a 'technique' unless you could find a proof of its certainty.) |
I'll try it when occurs, but I'm sure it'll fail
maybe it worked this time because there were so many 2-6 pairs |
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