American Scientific has a nice history of sudoku which I found through the LJ sudoku community. The math is a little fishy, but it’s still worth the read.
And for my fellow nonomino addicts: check out the stairstep sudokus in the sudoku place archives.
I’m thinking of expanding my Sudoku addiction to include nonomino sudoku, which has random shapes for the sub-grids instead of squares. There are zillions of free nonomino puzzles in PDF format at Hans Boldt’s web site.
I had no idea there were Sudoku Dashboard Widgets out there. It’s the perfect NaNo break…
I was introduced to the Sudoku fad through the ever-disposable Metro, the newspaper of choice for Boston commuters. But you can also play on the web.