romka@linux

Installed tesseract as an OSR engine.

It might require convert in_file -compression NONE -rotate _angle_ out_file.tif to convert graphical file to tif and properly rotate it

Afterwards tesseract file.tif file to generate file.txt with recognized image

There is a free version for Linux called pioneers. To add 3 computer players need to open new terminal and type:
pioneersai -n comp1 -s 127.0.0.1 & pioneersai -n comp2 -s 127.0.0.1 & pioneersai -n comp3 -s 127.0.0.1 &

found at http://ubuntuforums.org/showthread.php?t=1359342