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August 27th puzzle and hints

 
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Deano



Joined: 27 Aug 2005
Posts: 1
Location: pittsburgh, pa

PostPosted: Sat Aug 27, 2005 4:33 pm    Post subject: August 27th puzzle and hints Reply with quote

i have achieved the following for the august 27th puzzle:

623 -18 97-
817 9-2 6-3
-*- 763 821

78- 23- 1--
2-1 --- 3-7
-36 179 -82

372 691 --8
165 --7 239
948 325 716

the "Hint" given is for a "5" in the cell where i place the asterisk. can someone explain to me why this has to be a 5? i see the 5 being in either r3c1 or r3c2 and not just 23c2. i also have a 5 as a possibility in r6c1 or r5c2. help!
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David Bryant



Joined: 29 Jul 2005
Posts: 559
Location: Denver, Colorado

PostPosted: Sat Aug 27, 2005 7:43 pm    Post subject: Reply with quote

You need to analyze the "naked pairs" in this puzzle, Deano.

You can see already that r5c6 and r6c6 must contain the values {4, 6} in some order -- those are the only values missing in column 6. This means that the values {5, 8} must lie in the two cells r5c4 and r5c5, in some order.

Therefore the three remaining open cells in row 5 (that is, r5c2, r5c6, and r5c8) can only contain the values {4, 6, 9}. Now look at the second column -- since "4" and "6" are already entered there, r5c2 must be a "9".

This forces the "5" in r3c2, where you placed the *. dcb Smile
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geoff h



Joined: 07 Aug 2005
Posts: 58
Location: Sydney

PostPosted: Sun Aug 28, 2005 5:14 am    Post subject: August 27 puzzle Reply with quote

David,

I think you meant to say the pair of 4,6 are contained in r4c6 and r5c6 - r6c6 already contains the Nr 9!! This then leads to a pair of 5,8 in r5c4 and r5c5 as you said, which leads to placing the Nr 9 in r5c2.

The puzzle should be easily solved from there.

Cheers.
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Guest






PostPosted: Sun Aug 28, 2005 1:06 pm    Post subject: Reply with quote

You're right, Geoff -- my bad. Surprised Thanks for the clarification. dcb
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