Sudoku is fun, challenging, and sometimes frustratingly difficult-and those things make it tremendously addictive. Rodney L. Wagner, a retired businessman, pastor, and teacher knows that firsthand as he's completed thousands of puzzles of all ranges of difficulty. In this tutorial, he explains what Sudoku is and explains why it is so fun-but more importantly, he reveals helpful technique on solving puzzles that are particularly vexing. He knows the...