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lolumens
Joined: 25 Aug 2005
Posts: 5
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 Posted: Tue Sep 27, 2005 8:44 pm Post subject: Sept. 27 puzzle |
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I got this far:
X-3 9-- 87-
89- --- -6-
4-- --8 -59
6-- 2-- 983
31- -9- 62-
92- --6 -15
54- 183 -96
-36 --9 -48
-89 --4 53-
The hint was a 2 where I have an X
I don't understand the logic, can someone help me? |
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Louise56
Joined: 21 Sep 2005
Posts: 94
Location: El Cajon, California USA
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| Posted: Tue Sep 27, 2005 9:07 pm Post subject: Re: Sept. 27 puzzle |
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| lolumens wrote: | I got this far:
X-3 9-- 87-
89- --- -6-
4-- --8 -59
6-- 2-- 983
31- -9- 62-
92- --6 -15
54- 183 -96
-36 --9 -48
-89 --4 53-
The hint was a 2 where I have an X
I don't understand the logic, can someone help me? |
Look at the first column, bottom two spaces (c1r8, c1r9) In that 3x3 box, the 1's must be in either c1r8 or c1r9. Since a 1 must be in either of those two boxes, there cannot be a 1 in c1r1, otherwise there would be two 1's in the first column. You can now eliminate from c1r1 every number but a 2.
Good luck with the rest! |
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lolumens
Joined: 25 Aug 2005
Posts: 5
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| Posted: Tue Sep 27, 2005 11:50 pm Post subject: Thank you. |
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| Thank you, Louise. |
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zigzagpython
Joined: 27 Sep 2005
Posts: 4
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| Posted: Wed Sep 28, 2005 9:58 am Post subject: |
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| Thx for your hints. I solved it finally but still don't understand how to regonize only ' 2 ' in r1c1 |
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geoff h
Joined: 07 Aug 2005
Posts: 58
Location: Sydney
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| Posted: Wed Sep 28, 2005 10:49 am Post subject: |
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I'm assuming you have no problems in reaching the stage in solving the puzzle as shown in lolumen's posting. Consider Box Nr 7 ( r7c1 - r9c3 ).
The Nr 1 can not appear in r7c3 because it is already in r7c4. Therefore, Nr 1 MUST be in either r8c1 or r9c1 in order to satisfy Box Nr 7.
Therefore, we are now considering Column 1. The only possibilities for r1c1 are Nrs 1 and 2. However, since Nr 1 must be in either r8c1 or r9c1, we can delete it from r1c1 leaving Nr 2 as the only possibility.
Cheers. |
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Guest
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| Posted: Wed Sep 28, 2005 3:25 pm Post subject: |
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| Thx very much Geoff. now I clearly understand in where I got stuck. |
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