Unpack the archive file to a directory, say ~/chessbox_gnu4j,
and set that to your current directory.

Like GNU Chess, chessbox_gnu4j is a command line program. To run 
from the jar file, execute in the proper directory

  java -jar chessbox_gnu4j.jar 

Or compile the sources using javac or ant and run it.

Assuming ant:

  cd ~/chessbox_gnu4j
  ant -f chessbox_gnu4j.xml all
  java -cp classes org.chessbox.gnu4j.Main

You can also add command line options for chessbox_gnu4j to
the end of the last command, such as "--help".

Once the program begins, you'll see:

  chessbox_gnu4j 5.07
  Adjusting HashSize to 16384 slots
  Transposition table:  Entries=16K
  Pawn hash table:  Entries=8K
  White (1) : 

Enter commands or moves. "help" shows a command list.

Test gnuchess with the commands

	easy
	new
	post
	depth 8
	go
	quit

OR use the included IDEA project file...

I don't yet have the ant file building a jar file (because it's
auto-generated), but you can make one with the following command:

  jar cvmf MANIFEST.MF chessbox_gnu4j.jar -C classes/ .

XBoard
To use this engine with XBoard, copy the jar file into the XBoard directory and launch XBoard with:

   ./xboard -fcp "java -cp chessbox_gnu4j.jar org.chessbox.gnu4j.Main"

Author:
Xan Gregg
Bugs, comments: chessbox_gnu4j@chessbox.org