by **hana somekh** » Wed Aug 10, 2005 7:52 pm

Misprint error in my previous posting

Hi monkey,

In box 2 the digit 7 can only be placed in row 2 of that box.

This is because column 4 already has a 7 in box 8 at column 4 row 8 and therefore cannot be place in row 1 column 4.

Because the box 2 must have the 7's in row 2, ie either in row 2, column 4 or row 2 column 5, therefore, the digit 7 cannot be in column 2 of box 1.

This therefore means that the digit 7 in box 1 can only be in column 1 and column 3, ie row 1 column 1 and row 1 column 3.

Now -- in column 3, the digit 6 and 8 together can only be in row 2 and 8 and therefore can be eliminated from row 1 column 3, and hence leaving a 7 in row 1 column 3.

Hope this helps,

Hana.