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May 10

 
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Roland M.



Joined: 13 May 2006
Posts: 1
Location: Graz, Austria

PostPosted: Sat May 13, 2006 5:41 pm    Post subject: May 10 Reply with quote

After the 11th move I was stuck. The online hint suggested a 1 in r9c6.

Is there a logical explanation for this hint?

Of course, placing a 1 in the other possible cell r9c5 results in a conflict of having only a pair {56} for 3 (!) cells in row 9, but for me it taste a little bit to much like trial and error...


Roland

PS: Sorry for my maybe unclear language, since English isn't my mother tounge... Wink
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George Woods



Joined: 28 Mar 2006
Posts: 233
Location: Dorset UK

PostPosted: Sat May 13, 2006 6:01 pm    Post subject: hidden triplet Reply with quote

My notes show that 3 of the cells in row 9 are attacked by 1,2 and 9 so it "factors into 129 (in 3 cells) and 567in the other 3 hence the 1!

I hope my terse note has allowed me to give the valid argument!
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