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| Tempbow
| | Joined: 18 Apr 2005 | | Posts: 22 | | : | |
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 Posted: Sat Apr 30, 2005 12:49 pm Post subject: Smoking Gun Method |
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Posting invalid - withdrawn! 
Last edited by Tempbow on Sun May 01, 2005 9:28 pm; edited 3 times in total |
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| IJ
| | Joined: 15 Apr 2005 | | Posts: 16 | | : | |
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| Posted: Sat Apr 30, 2005 1:03 pm Post subject: |
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| Isn't this is rule 1? In your example, all the candidate cells for digit 6 in row 9 are in box 9, so the rest of box 9 can be cleared... |
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| Tempbow
| | Joined: 18 Apr 2005 | | Posts: 22 | | : | |
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| Posted: Sat Apr 30, 2005 9:45 pm Post subject: Smoking Gun Method - corrected |
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Another invalid posting, message withdrawn
Terry (NZ)
Last edited by Tempbow on Sun May 01, 2005 9:30 pm; edited 1 time in total |
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| Tempbow
| | Joined: 18 Apr 2005 | | Posts: 22 | | : | |
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| Posted: Sat Apr 30, 2005 10:05 pm Post subject: Re: Smoking Gun Method - corrected |
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Another generalised pattern:
| Code: | xxx xxx rrr
xxx xxx rrr
... ... 2/3 |
x represents the possibles
xxx represents 1, 2 or 3 possibles in that box row.
2/3 represent a box row that may contain 2 or 3 possibles (1 being trivial)
. represent s cells which cannot contain the possible
r represents the cells where that possible can be removed.
Terry (NZ) |
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| IJ
| | Joined: 15 Apr 2005 | | Posts: 16 | | : | |
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| Posted: Sat Apr 30, 2005 10:05 pm Post subject: Re: Smoking Gun Method - corrected |
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| Tempbow wrote: | The placement of any possible in the "rrr" areas would leave possibles restricted to the same two aligned box rows within the same row, which is invalid for a sudoku - you can't have the same value twice in the same row or column..
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I don't think this is true, is it? It would be valid in your example to have a 6 in r8c8 (accompanied, for example by r9c5, r7c3, r4c3 and r1c9). Similarly if r7c9 is a 6, then so are r9c5, r8c3, r4c3 and r1c9.
I think all you can infer from your ooo, eee layout (great names by the way  ) is that if there is a digit in either eee or ooo, then there must be one in the rrrs, or vice versa. I don't follow why placing the 6 in box 9, row 7 stops you putting one in box 7, row 8.
Your last post is rule 1 again ... |
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| Tempbow
| | Joined: 18 Apr 2005 | | Posts: 22 | | : | |
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| Posted: Sun May 01, 2005 5:13 am Post subject: Smoking Gun Method |
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I agree that I have not yet formulated it correctly. I just know there is something in there, but I can't generalise it.
I will come back to it, but I am tied up for a little while ....  |
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