Thanks! I have Arena 2.0.1; do you have a different version? Things aren't quite where you're saying. Also, are you left-handed? You keep telling me to left-click, but I have to right-click; maybe you've got your mouse configured for a left-hander...
The 3 different options you mention at the end; where do I find those? Thanks, again.
Yes I have Arena 2.0.1. Yes my mouse is backwards.
To use the "edit" and "analyze" buttons you have to make sure they are visible by right-clicking the chesboard and making sure the option "Display navigation bar under chessboard" is checked.
Have you downloaded Rybka 2.3?
PS LATEST UPDATE: Rybka just showed me a knight trap in another related variation where the natural 0-0? loses the knight to b4! because it has nowhere to go.