Sudoku

This sudoku puzzle generator/solver features: * character based (curses) interface; * cross-platform (Minix, Unix, Windows) with full source code (ANSI C); * generates hints upon request; * classification of board difficulty (very easy, easy, medium, hard or fiendish); * generation of new boards; * easy entry of boards published in newspapers, Internet, ...; * multiple output formats (text, csv, HTML, PostScript).