4digits is a guess-the-number puzzle game. It's also called Bulls and Cows, and in China people simply call it Guess-the-Number. The game's objective is to guess a four-digit number in 8 times.
+ 4digits 0.8 on Ubuntu Linux.
High score dialog.
4digits 1.1 on Windows 7 with hint table enabled.
4digits 0.4 on Windows XP.
Best record ever. The 1st time I tested it under Windows.