Our free and open source Mastermind V3.0 offers three challenges:
1. You are challenged to crack the computer generated secret code
2. You challenge the computer to crack your secret code
3. You challenge a friend to crack the your secret code.
Programmers are challenged to crack the program source logics. The program has a secret 'help key' that is not described in the manual.
The program requires MS Windows 7 and MS Excel 2010 or higher versions.