.tar.gz in Knoppix

[Richard A. Franklin]

Problem installing a .tar.gz download in Knoppix. (BTW, thanks to all 
who helped during and after the install to the HD this last Tuesday at 
Foss).

Trying to install Knights, a KDE chess interface. Fair program in SUSE 
... good graphics and plays well with the Phalynx and Crafty chess 
engines. Phalynx and Crafty work with Xboard, but it Xboard is primitive.

After unziping the file and changing directories

"./configure" yeilds this message:

checking for Qt... configure: error: Qt (>= Qt 3.0) (headers and 
libraries) not found. Please check your installation!  

tried

apt-get install libqt3-mt-dev

(that advice posted at debian.org)

only to find that libqt3-mt-dev is already the newest version ... so, 
obviously not the solution ... what specifically needs to be installed 
and/or modified?

thx,
Rick