This script is a treasure casket helper addon to be used with Windower for Final Fantasy XI.
You can report issues, get the latest version, and view the source at: https://github.com/svanheulen/boxdestroyer-windower-addon
Donations are welcome in the form of Alexandrite: Acacia on Odin (http://www.ffxiah.com/player/Odin/Acacia)
With this addon loaded, just click on any brown treasure casket and it will display info about possible combinations, the best number to guess and the worst case chance of guessing correctly.
The latest source and information for this addon can be found on GitHub.