CrossWordPuzzle

Question

hi freinds
i want to make a crosspuzzle that have variety of appearence and a button for go to next puzzle and a button for show answers(all of answer in puzzle in one table) and a button for navigation and a button for cheat my mean is user don't remember one char of a word and with cheat button could see that char
what database i need? SQL or XML that it wasn't too haevy?
you think what algotithm is better for making this kind of puzzle?