10 Sudoku Tips and Tricks for Beginners
There are more than a few techniques to solve a Sudoku puzzle ... and can get players far into more difficult puzzles before ...
Scientific American10d
The Math Mystery That Connects Sudoku, Flight Schedules and Protein Folding
Yank one into the realm of feasibility and the whole NP edifice collapses, and a scientific revolution rises from the rubble, ...