Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

I go out and pick up my morning paper as usual, come back in, get my coffee and set down at kitchen table and read through the articles that catch […] ...

Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...