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14 March 2009 @ 11:09 am
3/14/09 - A Whole Lot Of Nothing  
Not a lot of people have been commenting during this second week of "regular" KenKen, so I thought I'd shake things up today for the Saturday puzzle. I like exploring variations, so here I'm going to break the standard formula a little bit, adding nothing to the puzzle, to make a very hard but original challenge:

7x7 "Zero KenKen"

Rules: Fill in the cells with digits from 0 to 6 so that each digit appears a single time in each row and column. The numbers in the upper-left corner of each bolded region indicate the value of an operation (+, -, x, /) applied to the cells in that region. For multi-cell subtraction and division, the largest number is used first and all other numbers are subtracted/divided from it. Division by zero is not allowed.
(Anonymous) on May 30th, 2011 06:06 pm (UTC)
don't get it
I'm assuming that we don't mix operations. Having laid out all the zeros, in column 6 "0:4" can only have 6-3-2-1. Hence row 6 "12:2" can now only have 3*4, with r6c6=4. Now r2c6 can only be 5. Now the "20:3" can only be 2*2*5, with r2c4=5.

Now we have 5 twice in row 2!

what am I doing wrong here
motrismotris on May 30th, 2011 06:28 pm (UTC)
Re: don't get it
I like all your steps until you say "Now the '20:3' can only be 2*2*5". There is another possible product for the 20:3 which wouldn't put the 5 into r2.