nikoli.com

websudoku.com

dkmsoftware.com

sudoku.org.uk




bin-co.com

counton.org

sudoku-club.ru (rus)

absite.ru  (rus)

sudogo.com

timesonline.co.uk

jigsawdoku.com

logicgamesonline.com

sudoku-topical.com

www.domo-sudoku.com