* -----------------------------------------------------------------------
 * Additions: Significant Changes in average rating of the program on
 *            ICS's are noted in the form [chessnet, FICS].
 * -----------------------------------------------------------------------
 * April 21st, 1998.    - Major modifications to variable structures made
 *                        to ease future additions. Move history now saved
 *                        for up to 50 moves each side.
 * April 23rd, 1998.    - Castling & en passent are now valid moves.
 * April 28th, 1998.    - Move Lists implemented and History Converted so
 *                        there is no longer a limited # of moves
 * April 28th, 1998.    - Implemented the MiniMax Algorithm
 * May 1st, 1998.       - Implemented the Alpha-Beta algorithm
 * May 15th, 1998.      - Implemented Move Undo's and changed the position
 *                        back to a global structure for speed reasons.
 * May 16th, 1998.      - Interfaced the Program with xboard/winboard
 * June 8th, 1998.      - Fixed various bugs and made minor
 *                        performance enhancements v1.0.
 * June 26th, 1998.     - Basic Opening Book Completed v1.2
 *                        [1450, 1300]
 * October 25th, 1998.  - Better endgame king positioning. ICS Status 
 *                        whispers. v1.3
 * November 23rd, 1998. - Draw by repetition is now considered. v1.4
 * January 14th, 1999.  - Implemented Underpromotion 
 * January 16th, 1999.  - Algebraic Notation is accepted as input.
 * January 17th, 1999.  - Phased move generation added.
 * January 17th, 1999.  - Dynamic piece-square scoring added. 
 * January 21st, 1999.  - Partial quiescence search implemented. v1.5
 *                        [version did not play on ICS due to bugs]
 * April 15th, 1999.    - Completed the conversion to bitboard move
 *                        generation. Also made minor speed enhancements
 *                        such as king tracking.
 * April 18th, 1999.    - Changed the value of the queen in the PCSQ 
 *                        tables from 8 to 9. It was in error.
 *                      - Added an analysis command,... which scores
 *                        every possible move and gives it's best return.
 * April 20th, 1999.    - "Look for Check" algorithm was rewritten and
 *                        program speed increased slightly.
 * April 21st, 1999.    - FEN positional notation is accepted as input
 *                        for starting positions or to run tests from 
 *                        files.
 * April 23rd, 1999.    - Pierre can now output Algebraic Notation.
 *                      - Implemented the xboard 'hint' command.
 * April 24th, 1999.    - Full PGN Support added. Reading, Writing and 
 *                        building the opening book from them are all
 *                        now supported.
 * June 2nd, 1999.      - Search now returns a whole PV instead of just
 *                        the move to be made.
 * June 3rd, 1999.      - Implemented iteritive deepening with the 
 *                        previous PV being searched first.
 *                      - Converted from depth based to time based 
 *                        searching. Updated the analysis function to
 *                        reflect this change.
 * June 5th, 1999.      - Completed the zero-width PV search for inner
 *                        calls after the Principle Variation is searched.
 *                      - Implemented Aspiration Search. Window size 
 *                        defaults to 1/2 pawn but can be set in centi-
 *                        pawns from the command line.
 * June 22nd, 1999.     - Switched from using clock() to using
 *                        gettimeofday() for internal timings. It is now
 *                        accurate!
 * June 26th, 1999.     - Modified the analysis function to support 
 *                        Xboard's "show thinking" option. Also added
 *                        support for the "book" menu item.
 * June 27th, 1999.     - Fixed pgn logging. Date, time, time controls
 *                        are now logged and log file can be specified
 *                        on the command line.
 * July 22nd, 1999.     - Added some king safety into the evaluation.
 * July 24th, 1999.     - Switched to dynamic position checksums. Also
 *                        fixed a bug in repetition detection. It was 
 *                        actually looking for 4 reps because it wasn't
 *                        including the first occurence.
 * -----------------------------------------------------------------------