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Audio games have finally cracked it. The numbers game which has been taking the world by storm - and I don't mean Countdown - is, at last, blind friendly. It's not a cumbersome board with wires and pegs, or something Braille-related - no, it's an accessible computer game version of Sudoku.

is an accessible version of the popular puzzle game. In case you didn't know, Sudoku is a logic-based placement puzzle, invented by a blind mathematician in the 18th century.

This accessible version is free, the key commands are dead simple, and there are enough sounds and graphics to rival the best of them. So if you want to know more, check it out on the website.