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germanboy
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PostPosted: Tue Oct 18, 2005 7:22 pm    Post subject: help Reply with quote

damn i can't solve this one. help needed. i need the next number which fits. plz explain why this number has its place. Im sure its right this far.



x7x 413 xxx
1x8 xx6 34x
x43 8x9 x2x

315 x47 xxx
xxx xx8 xxx
xxx 195 734

x2x xx4 89x
xxx 7x2 4x3
x3x 981 x7x
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David Bryant



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

PostPosted: Tue Oct 18, 2005 8:35 pm    Post subject: Here's a little hint Reply with quote

Try putting a "9" in r5c2.

Because you have six numbers in row 6, you can see that the contents of the last row in the middle left 3x3 box (r6c1, r6c2, & r6c3) are {5, 6, 8}, in some order. Therefore the contents of the middle row in that box (r5c1, r5c2, & r5c3) must be {4, 7, 9}, in some order.

You already have {4, 7} entered in column 2. So the only possible value at r5c2 is 9. dcb
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