Greenstreet Software has produced a mobile phone version of its top- selling SuDoku Classic PC game – and the first 10 games are free. It will work on most modern mobiles with a WAP/Java enabled colour screen; additional games can be downloaded for £1.50 for 10 games. Check it out at www.m-sudoku.com/sudoku.jar or by texting “SuDoku”to 601999.