when I try to work through some of the positions by playing against the computer Java loads in such a way that I can only see 7 rows. Anyone else have this problem. Any idea how to fix it? Thanks for any help.

Try maximizing the window, then resizing it back to its original size.  If that doesn't work, restart your browser and try again.  If that doesn't work, try rebooting your computer.   If that doesn't work, you may have to uninstall your current version of Java, and reinstall the most recent version.

I have never seen this problem by the way.

OK thanks. I'll give it a go.