Said What Online games to play and an e-book to buy.
Online games with a new puzzle generated every time you want to play. There are also some great card games to play too.
Paul's Pages Website from Computor Journalist Paul Stevens includes Random Sudoku - The game is randomly selected and may be easy, an 'absolute mind-boggler' or anything in between. It can also be used as a solver.
Three games to play online, one each of easy, medium and hard.
Sudoku Quotes and Tips The only skill involved in sudoku is logical deduction. Cryptic crosswords require a fair amount of cultural knowledge; sudoku is cross-cultural. Dr Anuj Dawar - Cambridge University