Phalanx is a chess playing program.  Phalanx is xboard compatible.
Running with xboard: 'xboard -fcp phalanx'.  Note that permanent brain
(pondering) is off by default.  Newer versions of xboard set it on with
the 'hard' command.  If this does not work, try 'xboard -fcp "phalanx -p+"'
or (for <4.0.0 versions of xboard) change your initString (see Xboard
documentation for details).  It's better to stop permanent brain in both
programs, when playing Phalanx against another program on a machine with
one CPU.
   It's also possible to run phalanx without xboard. Do "phalanx -h" to get
a list of command line options. One important command of phalanx's ASCII
interface is "help".

WWW: http://www.crosswinds.net/~dobes/phalanx/