The JChess, a simple engine on the right, was developed in JAVA by Lokasoft. If you can beat the JChess engine five times consecutively, you are ready to pursue to the next phase. ATTENTION: If you get a message "Application Blocked" you have to authorize nutritionmodels.com website to use Java. Go to Windows Control Panel, JAVA, Security, add "http://www.nutritionmodels.com" and "http://nutritionmodels.com" in the exception site list, and Apply it. Restart the internet browser. Firefox browser still works really well with these Java applets. Always check for latest Java download.