Huo Chess in Java
This is the Java edition of Huo Chess. The smallest and best open source chess program for educational purposes. The java file is only 48 KB in size. It can be used for educational purposes in order to understand how a simple chess program works. The Java edition can be used as the basis of the relevant Huo Chess Android edition if someone wishes so. Using the reusing the program in any way (including selling) is totally free, if the source is properly cited and attributed.
Seek relative chess programming tutorials based on Huo Chess either at Harmonia Philosophica or at chess-programming.com portal.
Important Note: The edition is still in beta version and some minor problems do exist. However the program can be used for tutorials!